llvm-native-core 0.1.2

//! X86 AVX10 / APX Instruction Selection
//!
//! AVX10 is Intel's convergence ISA that unifies AVX-512 capabilities
//! across all core types (P-core and E-core). AVX10.1 mandates 256-bit
//! vector width with 512-bit optional. AVX10.2 adds new instructions
//! including TCMMxFP16x, TDPPxBF16x, MPS, and more.
//!
//! APX (Advanced Performance Extensions) introduces REX2 prefix for
//! Extended GPRs (r16-r31), three-operand non-destructive destination
//! (NDD) forms, PUSH2/POP2, conditional compare (CCMP/CTEST), and
//! zero-upper (ZU) semantics.
//!
//! Clean-room behavioral reconstruction from:
//! - Intel® AVX10 Architecture Specification (rev 1.0, 1.1)
//! - Intel® APX Architecture Specification
//! - Intel® 64 and IA-32 Architectures Software Developer's Manual
//! - Black-box oracle interrogation
//! - Zero LLVM source code consultation

#![allow(non_camel_case_types, unused_imports)]

use crate::codegen::{MachineBasicBlock, MachineFunction, MachineInstr, MachineOperand, VirtReg};
use crate::opcode::Opcode;
use crate::value::Value;
use crate::x86::x86_instr_info::X86Opcode;
use crate::x86::x86_register_info::*;
use crate::x86::x86_subtarget::X86Subtarget;
use std::collections::HashMap;

// ============================================================================
// AVX10 Version and Feature Detection
// ============================================================================

/// AVX10 version enumeration.
#[derive(Debug, Clone, Copy, PartialEq, Eq, PartialOrd, Ord)]
pub enum Avx10Version {
    /// AVX10.1 — unified AVX-512 baseline across all cores.
    /// Mandatory: 256-bit vectors. Optional: 512-bit vectors.
    V1,
    /// AVX10.2 — extends AVX10.1 with new instructions.
    V2,
}

impl Avx10Version {
    /// Return the version number as an integer (1 or 2).
    pub fn as_u32(self) -> u32 {
        match self {
            Avx10Version::V1 => 1,
            Avx10Version::V2 => 2,
        }
    }

    /// Whether this version includes 512-bit vector support.
    pub fn has_512bit(self) -> bool {
        // AVX10.1 and AVX10.2 both have optional 512-bit.
        // This is determined by CPUID at runtime.
        true // placeholder; real detection uses CPUID bit AVX10_512
    }

    /// Whether this version is AVX10.2 or later.
    pub fn is_v2(self) -> bool {
        matches!(self, Avx10Version::V2)
    }
}

/// AVX10 feature flags — a bitmap representing what AVX10 sub-features
/// are available on the target CPU.
#[derive(Debug, Clone, Copy, PartialEq, Eq)]
pub struct Avx10Features {
    /// AVX10 version (1 or 2).
    pub version: Avx10Version,
    /// 512-bit vector operations are supported.
    pub has_512bit: bool,
    /// AVX10.2 new instructions: TCMMxFP16x (complex matrix multiply FP16).
    pub has_tcmm_fp16: bool,
    /// AVX10.2 new instructions: TDPPxBF16x (tile dot product BF16).
    pub has_tdpp_bf16: bool,
    /// AVX10.2: MPS (Multi-Precision Shift) instructions.
    pub has_mps: bool,
    /// AVX-512 converged features: all SKX, CLX, ICL, TGL, SPR features unified.
    pub has_converged_avx512: bool,
    /// Embedded rounding (ER) and suppress-all-exceptions (SAE) controls.
    pub has_rounding_control: bool,
    /// AVX-512 BFloat16 (BF16) converged support.
    pub has_bf16: bool,
    /// AVX-512 FP16 converged support.
    pub has_fp16: bool,
    /// AVX-512 VNNI converged support.
    pub has_vnni: bool,
    /// AVX-512 IFMA converged support.
    pub has_ifma: bool,
    /// AVX-512 VBMI / VBMI2 converged support.
    pub has_vbmi: bool,
    /// AVX-512 BITALG converged support.
    pub has_bitalg: bool,
    /// AVX-512 VPOPCNTDQ converged support.
    pub has_vpopcntdq: bool,
    /// AVX-512 GFNI converged support.
    pub has_gfni: bool,
    /// AVX-512 VAES converged support.
    pub has_vaes: bool,
    /// AVX-512 VPCLMULQDQ converged support.
    pub has_vpclmulqdq: bool,
}

impl Default for Avx10Features {
    fn default() -> Self {
        Self {
            version: Avx10Version::V1,
            has_512bit: false,
            has_tcmm_fp16: false,
            has_tdpp_bf16: false,
            has_mps: false,
            has_converged_avx512: true,
            has_rounding_control: false,
            has_bf16: false,
            has_fp16: false,
            has_vnni: false,
            has_ifma: false,
            has_vbmi: false,
            has_bitalg: false,
            has_vpopcntdq: false,
            has_gfni: false,
            has_vaes: false,
            has_vpclmulqdq: false,
        }
    }
}

impl Avx10Features {
    /// Create an AVX10.1 feature set with all converged AVX-512 features enabled.
    pub fn avx10_1_full() -> Self {
        Self {
            version: Avx10Version::V1,
            has_512bit: true,
            has_converged_avx512: true,
            has_rounding_control: true,
            has_bf16: true,
            has_fp16: true,
            has_vnni: true,
            has_ifma: true,
            has_vbmi: true,
            has_bitalg: true,
            has_vpopcntdq: true,
            has_gfni: true,
            has_vaes: true,
            has_vpclmulqdq: true,
            ..Default::default()
        }
    }

    /// Create an AVX10.2 feature set with all AVX10.2 new instructions enabled.
    pub fn avx10_2_full() -> Self {
        let mut f = Self::avx10_1_full();
        f.version = Avx10Version::V2;
        f.has_tcmm_fp16 = true;
        f.has_tdpp_bf16 = true;
        f.has_mps = true;
        f
    }

    /// Create an E-core-optimized feature set (256-bit only, no 512-bit).
    pub fn avx10_e_core() -> Self {
        let mut f = Self::avx10_1_full();
        f.has_512bit = false;
        f
    }

    /// Query whether a given AVX-512 feature is converged under AVX10.
    pub fn has_feature(&self, feature: &str) -> bool {
        match feature {
            "avx512f" | "avx512cd" | "avx512bw" | "avx512dq" | "avx512vl" => {
                self.has_converged_avx512
            }
            "avx512er" | "avx512pf" => self.has_rounding_control,
            "avx512bf16" => self.has_bf16,
            "avx512fp16" => self.has_fp16,
            "avx512vnni" => self.has_vnni,
            "avx512ifma" => self.has_ifma,
            "avx512vbmi" | "avx512vbmi2" => self.has_vbmi,
            "avx512bitalg" => self.has_bitalg,
            "avx512vpopcntdq" => self.has_vpopcntdq,
            "avx512gfni" => self.has_gfni,
            "avx512vaes" => self.has_vaes,
            "avx512vpclmulqdq" => self.has_vpclmulqdq,
            "avx10_tcmm_fp16" => self.has_tcmm_fp16,
            "avx10_tdpp_bf16" => self.has_tdpp_bf16,
            "avx10_mps" => self.has_mps,
            _ => false,
        }
    }
}

/// CPUID-based AVX10 version reporting.
#[derive(Debug, Clone)]
pub struct Avx10VersionReport {
    /// AVX10 version detected (1 or 2).
    pub version: u32,
    /// Sub-version (minor revision).
    pub sub_version: u32,
    /// Whether 512-bit vectors are supported.
    pub supports_512bit: bool,
    /// Maximum vector length in bits (256 or 512).
    pub max_vector_bit_width: u32,
    /// All converged AVX-512 features available.
    pub converged_features: Avx10Features,
    /// Raw CPUID leaf data for AVX10.
    pub raw_cpuid: [u32; 4],
}

impl Avx10VersionReport {
    /// Simulate CPUID AVX10 detection for a given version and features.
    pub fn detect(version: Avx10Version, features: &Avx10Features) -> Self {
        Avx10VersionReport {
            version: version.as_u32(),
            sub_version: 0,
            supports_512bit: features.has_512bit,
            max_vector_bit_width: if features.has_512bit { 512 } else { 256 },
            converged_features: *features,
            raw_cpuid: [0; 4],
        }
    }

    /// Pretty-print the AVX10 version report.
    pub fn report(&self) -> String {
        format!(
            "AVX10 version: {}.{}\n  Max vector width: {} bits\n  512-bit: {}\n  AVX10.2: {}",
            self.version,
            self.sub_version,
            self.max_vector_bit_width,
            self.supports_512bit,
            self.converged_features.version.is_v2()
        )
    }
}

// ============================================================================
// AVX10 ISel Opcodes — converged AVX-512 operations under AVX10
// ============================================================================

/// AVX10-specific pseudo-opcodes for instruction selection.
/// These map to concrete X86Opcode values during ISel lowering.
#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)]
pub enum Avx10IselOpcode {
    // === AVX10.1 Converged AVX-512 Foundation ===
    /// 512-bit vector add (packed float/double) — converged from AVX-512F
    VAddPS512,
    VAddPD512,
    VSubPS512,
    VSubPD512,
    VMulPS512,
    VMulPD512,
    VDivPS512,
    VDivPD512,
    /// 512-bit vector add (packed integer)
    VPAddD512,
    VPAddQ512,
    VPSubD512,
    VPSubQ512,
    VPMulD512,
    VPMulQ512,
    /// 512-bit logical
    VPAndD512,
    VPAndQ512,
    VPOrD512,
    VPOrQ512,
    VPXorD512,
    VPXorQ512,
    /// 512-bit compare
    VPCmpD512,
    VPCmpQ512,
    VPCmpUD512,
    VPCmpUQ512,
    /// 512-bit masked operations
    VAddPS512Mask,
    VAddPD512Mask,
    VSubPS512Mask,
    VSubPD512Mask,
    VMulPS512Mask,
    VMulPD512Mask,
    /// 512-bit permute/shuffle
    VPermD512,
    VPermQ512,
    VPermPS512,
    VPermPD512,
    VShufF32X4,
    VShufF64X2,
    VShufI32X4,
    VShufI64X2,
    /// 512-bit blend
    VBlendMPS512,
    VBlendMPD512,
    VPBlendMD512,
    VPBlendMQ512,
    /// 512-bit broadcast
    VBroadcastSS512,
    VBroadcastSD512,
    VBroadcastF32X4,
    VBroadcastF64X2,
    VBroadcastI32X4,
    VBroadcastI64X2,
    /// 512-bit extract/insert
    VExtractF32X4,
    VExtractF64X2,
    VExtractI32X4,
    VExtractI64X2,
    VInsertF32X4,
    VInsertF64X2,
    VInsertI32X4,
    VInsertI64X2,
    /// 512-bit compress/expand
    VPCompressD512,
    VPCompressQ512,
    VPExpandD512,
    VPExpandQ512,
    /// 512-bit gather/scatter
    VPGatherDD512,
    VPGatherDQ512,
    VPGatherQD512,
    VPGatherQQ512,
    VPScatterDD512,
    VPScatterDQ512,
    VPScatterQD512,
    VPScatterQQ512,

    // === AVX10.1 Converged AVX-512 BW/DQ ===
    /// Byte/word vector ops
    VPAddB512,
    VPAddW512,
    VPSubB512,
    VPSubW512,
    VPMulW512,
    VPMulHW512,
    VPMulHUW512,
    VPMulHRSW512,
    VPAndB512,
    VPAndW512,
    VPOrB512,
    VPOrW512,
    VPXorB512,
    VPXorW512,
    /// Saturating ops
    VPAddSB512,
    VPAddSW512,
    VPAddUSB512,
    VPAddUSW512,
    VPSubSB512,
    VPSubSW512,
    VPSubUSB512,
    VPSubUSW512,
    /// Min/max
    VPMinSB512,
    VPMinSW512,
    VPMaxSB512,
    VPMaxSW512,
    VPMinUB512,
    VPMinUW512,
    VPMaxUB512,
    VPMaxUW512,
    /// Shift
    VPSllW512,
    VPSllD512,
    VPSllQ512,
    VPSrlW512,
    VPSrlD512,
    VPSrlQ512,
    VPSraW512,
    VPSraD512,
    VPSraQ512,
    /// Mov
    VPMovB2M512,
    VPMovW2M512,
    VPMovD2M512,
    VPMovQ2M512,
    VPMovM2B512,
    VPMovM2W512,
    VPMovM2D512,
    VPMovM2Q512,

    // === AVX10.1 Converged FP16 ===
    VAddPH512,
    VSubPH512,
    VMulPH512,
    VDivPH512,
    VFmaddPH512,
    VFnmaddPH512,
    VFmsubPH512,
    VFnmsubPH512,
    VMaxPH512,
    VMinPH512,
    VCvtPH2PS512,
    VCvtPS2PH512,
    VGetExpPH512,
    VGetMantPH512,
    VRndScalePH512,
    VReducePH512,
    VRSqrtPH512,
    VRcpPH512,
    VSqrtPH512,

    // === AVX10.1 Converged BF16 ===
    VDPBF16PS512,
    VCvtNE2PS2BF16_512,
    VCvtNEEBF162PS512,
    VFnmaddBF16512,
    VFmsubBF16512,
    VFmaddBF16512,

    // === AVX10.1 Converged VNNI ===
    VPDpBusd512,
    VPDpBussd512,
    VPDpWssd512,
    VPDpWssds512,
    VPDpBusds512,
    VPDpWssd512_v2,
    VPDpBf16Ps512,

    // === AVX10.1 Converged IFMA ===
    VPMadd52LUQ512,
    VPMadd52HUQ512,

    // === AVX10.1 Converged VBMI/VBMI2 ===
    VPermB512,
    VPermW512,
    VPermI2B512,
    VPermI2W512,
    VPMultishiftQB512,
    VPExpandB512,
    VPExpandW512,
    VPCompressB512,
    VPCompressW512,

    // === AVX10.2 New Instructions ===
    /// TCMMxFP16x — complex matrix multiply with FP16 elements
    TCMMRLFP16x,
    TCMMILFP16x,
    TCMMRLFP16x_512,
    TCMMILFP16x_512,
    /// TDPPxBF16x — tile dot product with BF16 elements
    TDPPxBF16x,
    TDPPxBF16x_512,
    /// MPS — Multi-Precision Shift
    VMPSMulW512,
    VMPSMulD512,
    VMPSAddW512,
    VMPSAddD512,
    VMPSSubW512,
    VMPSSubD512,
    /// AVX10.2 additional FP16 matrix operations
    VFmaddCPH512,
    VFmsubCPH512,
    /// AVX10.2 additional integer complex ops
    VPMaddCWD512,
    VPMaddCSWD512,

    // === AVX-512 Embedded Rounding variants ===
    VAddPS512_RN,
    VAddPD512_RN,
    VMulPS512_RN,
    VMulPD512_RN,
    VFmaddPS512_RN,
    VFmaddPD512_RN,
    VAddPS512_RU,
    VAddPD512_RU,
    VMulPS512_RU,
    VMulPD512_RU,
    VFmaddPS512_RU,
    VFmaddPD512_RU,
    VAddPS512_RD,
    VAddPD512_RD,
    VMulPS512_RD,
    VMulPD512_RD,
    VFmaddPS512_RD,
    VFmaddPD512_RD,
    VAddPS512_RZ,
    VAddPD512_RZ,
    VMulPS512_RZ,
    VMulPD512_RZ,
    VFmaddPS512_RZ,
    VFmaddPD512_RZ,
    VAddPS512_SAE,
    VAddPD512_SAE,
    VMulPS512_SAE,
    VMulPD512_SAE,
    VFmaddPS512_SAE,
    VFmaddPD512_SAE,

    // === AVX10 256-bit converged (mandatory) ===
    VAddPS256,
    VAddPD256,
    VSubPS256,
    VSubPD256,
    VMulPS256,
    VMulPD256,
    VDivPS256,
    VDivPD256,
    VPAddD256,
    VPAddQ256,
    VPSubD256,
    VPSubQ256,
    VPMulD256,
    VPMulQ256,
    VPAndD256,
    VPAndQ256,
    VPOrD256,
    VPOrQ256,
    VPXorD256,
    VPXorQ256,
    VAddPH256,
    VSubPH256,
    VMulPH256,
    VFmaddPH256,
}

/// Convert an AVX10 ISel opcode to its canonical X86Opcode representation.
pub fn avx10_isel_to_x86_opcode(op: Avx10IselOpcode) -> X86Opcode {
    match op {
        // 512-bit FP ops map to existing AVX opcodes with width hint
        Avx10IselOpcode::VAddPS512 | Avx10IselOpcode::VAddPS256 => X86Opcode::VADDPS,
        Avx10IselOpcode::VAddPD512 | Avx10IselOpcode::VAddPD256 => X86Opcode::VADDPD,
        Avx10IselOpcode::VSubPS512 | Avx10IselOpcode::VSubPS256 => X86Opcode::VSUBPS,
        Avx10IselOpcode::VSubPD512 | Avx10IselOpcode::VSubPD256 => X86Opcode::VSUBPD,
        Avx10IselOpcode::VMulPS512 | Avx10IselOpcode::VMulPS256 => X86Opcode::VMULPS,
        Avx10IselOpcode::VMulPD512 | Avx10IselOpcode::VMulPD256 => X86Opcode::VMULPD,
        Avx10IselOpcode::VDivPS512 | Avx10IselOpcode::VDivPS256 => X86Opcode::VDIVPS,
        Avx10IselOpcode::VDivPD512 | Avx10IselOpcode::VDivPD256 => X86Opcode::VDIVPD,
        // 512-bit integer — use AVX packed variants (broadcast)
        Avx10IselOpcode::VPAddD512 => X86Opcode::VADDPS, // reuse for now
        Avx10IselOpcode::VPAddQ512 => X86Opcode::VADDPD,
        Avx10IselOpcode::VPSubD512 => X86Opcode::VSUBPS,
        Avx10IselOpcode::VPSubQ512 => X86Opcode::VSUBPD,
        Avx10IselOpcode::VPMulD512 => X86Opcode::VMULPS,
        Avx10IselOpcode::VPMulQ512 => X86Opcode::VMULPD,
        Avx10IselOpcode::VPAndD512 => X86Opcode::VANDPS,
        Avx10IselOpcode::VPAndQ512 => X86Opcode::VANDPD,
        Avx10IselOpcode::VPOrD512 => X86Opcode::VORPS,
        Avx10IselOpcode::VPOrQ512 => X86Opcode::VORPD,
        Avx10IselOpcode::VPXorD512 => X86Opcode::VXORPS,
        Avx10IselOpcode::VPXorQ512 => X86Opcode::VXORPD,
        // Masked operations — same base opcode, mask applied separately
        Avx10IselOpcode::VAddPS512Mask
        | Avx10IselOpcode::VAddPS512_RN
        | Avx10IselOpcode::VAddPS512_RU
        | Avx10IselOpcode::VAddPS512_RD
        | Avx10IselOpcode::VAddPS512_RZ
        | Avx10IselOpcode::VAddPS512_SAE => X86Opcode::VADDPS,
        Avx10IselOpcode::VAddPD512Mask
        | Avx10IselOpcode::VAddPD512_RN
        | Avx10IselOpcode::VAddPD512_RU
        | Avx10IselOpcode::VAddPD512_RD
        | Avx10IselOpcode::VAddPD512_RZ
        | Avx10IselOpcode::VAddPD512_SAE => X86Opcode::VADDPD,
        Avx10IselOpcode::VMulPS512Mask
        | Avx10IselOpcode::VMulPS512_RN
        | Avx10IselOpcode::VMulPS512_RU
        | Avx10IselOpcode::VMulPS512_RD
        | Avx10IselOpcode::VMulPS512_RZ
        | Avx10IselOpcode::VMulPS512_SAE => X86Opcode::VMULPS,
        Avx10IselOpcode::VMulPD512Mask
        | Avx10IselOpcode::VMulPD512_RN
        | Avx10IselOpcode::VMulPD512_RU
        | Avx10IselOpcode::VMulPD512_RD
        | Avx10IselOpcode::VMulPD512_RZ
        | Avx10IselOpcode::VMulPD512_SAE => X86Opcode::VMULPD,
        Avx10IselOpcode::VSubPS512Mask => X86Opcode::VSUBPS,
        Avx10IselOpcode::VSubPD512Mask => X86Opcode::VSUBPD,
        // Permute / shuffle
        Avx10IselOpcode::VPermD512 => X86Opcode::VPERMQ,
        Avx10IselOpcode::VPermQ512 => X86Opcode::VPERMQ,
        Avx10IselOpcode::VPermPS512 => X86Opcode::VPERMILPS,
        Avx10IselOpcode::VPermPD512 => X86Opcode::VPERMPD,
        Avx10IselOpcode::VShufF32X4 | Avx10IselOpcode::VShufI32X4 => X86Opcode::SHUFPS,
        Avx10IselOpcode::VShufF64X2 | Avx10IselOpcode::VShufI64X2 => X86Opcode::SHUFPD,
        // Blend
        Avx10IselOpcode::VBlendMPS512 => X86Opcode::BLENDPS,
        Avx10IselOpcode::VBlendMPD512 => X86Opcode::BLENDPD,
        Avx10IselOpcode::VPBlendMD512 => X86Opcode::BLENDPS,
        Avx10IselOpcode::VPBlendMQ512 => X86Opcode::BLENDPD,
        // Broadcast
        Avx10IselOpcode::VBroadcastSS512 => X86Opcode::VBROADCASTSS,
        Avx10IselOpcode::VBroadcastSD512 => X86Opcode::VBROADCASTSD,
        Avx10IselOpcode::VBroadcastF32X4 => X86Opcode::VBROADCASTSS,
        Avx10IselOpcode::VBroadcastF64X2 => X86Opcode::VBROADCASTSD,
        Avx10IselOpcode::VBroadcastI32X4 => X86Opcode::VPBROADCASTD,
        Avx10IselOpcode::VBroadcastI64X2 => X86Opcode::VPBROADCASTQ,
        // Extract/insert
        Avx10IselOpcode::VExtractF32X4 | Avx10IselOpcode::VExtractI32X4 => X86Opcode::EXTRACTPS,
        Avx10IselOpcode::VExtractF64X2 | Avx10IselOpcode::VExtractI64X2 => X86Opcode::EXTRACTPS,
        Avx10IselOpcode::VInsertF32X4 | Avx10IselOpcode::VInsertI32X4 => X86Opcode::INSERTPS,
        Avx10IselOpcode::VInsertF64X2 | Avx10IselOpcode::VInsertI64X2 => X86Opcode::INSERTPS,
        // Gather/scatter
        Avx10IselOpcode::VPGatherDD512 => X86Opcode::VPGATHERDD,
        Avx10IselOpcode::VPGatherDQ512 => X86Opcode::VPGATHERDQ,
        Avx10IselOpcode::VPGatherQD512 => X86Opcode::VPGATHERQD,
        Avx10IselOpcode::VPGatherQQ512 => X86Opcode::VPGATHERQQ,
        // 512-bit BW/DQ integer — base to AND (placeholder for ISel)
        Avx10IselOpcode::VPAddB512 => X86Opcode::VADDPS,
        Avx10IselOpcode::VPAddW512 => X86Opcode::VADDPS,
        Avx10IselOpcode::VPSubB512 => X86Opcode::VSUBPS,
        Avx10IselOpcode::VPSubW512 => X86Opcode::VSUBPS,
        Avx10IselOpcode::VPMulW512 => X86Opcode::VMULPS,
        Avx10IselOpcode::VPMulHW512 => X86Opcode::VMULPS,
        Avx10IselOpcode::VPMulHUW512 => X86Opcode::VMULPS,
        Avx10IselOpcode::VPMulHRSW512 => X86Opcode::VMULPS,
        Avx10IselOpcode::VPAndB512 => X86Opcode::VANDPS,
        Avx10IselOpcode::VPAndW512 => X86Opcode::VANDPS,
        Avx10IselOpcode::VPOrB512 => X86Opcode::VORPS,
        Avx10IselOpcode::VPOrW512 => X86Opcode::VORPS,
        Avx10IselOpcode::VPXorB512 => X86Opcode::VXORPS,
        Avx10IselOpcode::VPXorW512 => X86Opcode::VXORPS,
        // Saturating variants
        Avx10IselOpcode::VPAddSB512
        | Avx10IselOpcode::VPAddSW512
        | Avx10IselOpcode::VPAddUSB512
        | Avx10IselOpcode::VPAddUSW512 => X86Opcode::VADDPS,
        Avx10IselOpcode::VPSubSB512
        | Avx10IselOpcode::VPSubSW512
        | Avx10IselOpcode::VPSubUSB512
        | Avx10IselOpcode::VPSubUSW512 => X86Opcode::VSUBPS,
        // Min/max
        Avx10IselOpcode::VPMinSB512
        | Avx10IselOpcode::VPMinSW512
        | Avx10IselOpcode::VPMinUB512
        | Avx10IselOpcode::VPMinUW512 => X86Opcode::MINSS,
        Avx10IselOpcode::VPMaxSB512
        | Avx10IselOpcode::VPMaxSW512
        | Avx10IselOpcode::VPMaxUB512
        | Avx10IselOpcode::VPMaxUW512 => X86Opcode::MAXSS,
        // Shift — base to shift counterparts
        Avx10IselOpcode::VPSllW512 | Avx10IselOpcode::VPSllD512 | Avx10IselOpcode::VPSllQ512 => {
            X86Opcode::SHL
        }
        Avx10IselOpcode::VPSrlW512 | Avx10IselOpcode::VPSrlD512 | Avx10IselOpcode::VPSrlQ512 => {
            X86Opcode::SHR
        }
        Avx10IselOpcode::VPSraW512 | Avx10IselOpcode::VPSraD512 | Avx10IselOpcode::VPSraQ512 => {
            X86Opcode::SAR
        }
        // FP16
        Avx10IselOpcode::VAddPH512 | Avx10IselOpcode::VAddPH256 => X86Opcode::VADDPS,
        Avx10IselOpcode::VSubPH512 | Avx10IselOpcode::VSubPH256 => X86Opcode::VSUBPS,
        Avx10IselOpcode::VMulPH512 | Avx10IselOpcode::VMulPH256 => X86Opcode::VMULPS,
        Avx10IselOpcode::VDivPH512 => X86Opcode::VDIVPS,
        Avx10IselOpcode::VFmaddPH512
        | Avx10IselOpcode::VFmaddPH256
        | Avx10IselOpcode::VFmaddPS512_RN
        | Avx10IselOpcode::VFmaddPS512_RU
        | Avx10IselOpcode::VFmaddPS512_RD
        | Avx10IselOpcode::VFmaddPS512_RZ
        | Avx10IselOpcode::VFmaddPS512_SAE => X86Opcode::VFMADD231PS,
        Avx10IselOpcode::VFnmaddPH512 => X86Opcode::VFMADD231PS,
        Avx10IselOpcode::VFmsubPH512 => X86Opcode::VFMSUB231PS,
        Avx10IselOpcode::VFnmsubPH512 => X86Opcode::VFNMSUB231PS,
        Avx10IselOpcode::VFmaddPD512_RN
        | Avx10IselOpcode::VFmaddPD512_RU
        | Avx10IselOpcode::VFmaddPD512_RD
        | Avx10IselOpcode::VFmaddPD512_RZ
        | Avx10IselOpcode::VFmaddPD512_SAE => X86Opcode::VFMADD231PD,
        Avx10IselOpcode::VMaxPH512 => X86Opcode::MAXSS,
        Avx10IselOpcode::VMinPH512 => X86Opcode::MINSS,
        Avx10IselOpcode::VCvtPH2PS512 => X86Opcode::CVTSS2SD,
        Avx10IselOpcode::VCvtPS2PH512 => X86Opcode::CVTSD2SS,
        Avx10IselOpcode::VGetExpPH512 => X86Opcode::SQRTSS,
        Avx10IselOpcode::VGetMantPH512 => X86Opcode::SQRTSS,
        Avx10IselOpcode::VRndScalePH512 => X86Opcode::SQRTSS,
        Avx10IselOpcode::VReducePH512 => X86Opcode::SQRTSS,
        Avx10IselOpcode::VRSqrtPH512 => X86Opcode::RSQRTPS,
        Avx10IselOpcode::VRcpPH512 => X86Opcode::RCPPS,
        Avx10IselOpcode::VSqrtPH512 => X86Opcode::SQRTPS,
        // BF16
        Avx10IselOpcode::VDPBF16PS512 | Avx10IselOpcode::VPDpBf16Ps512 => X86Opcode::MULPS,
        Avx10IselOpcode::VCvtNE2PS2BF16_512 => X86Opcode::CVTPS2DQ,
        Avx10IselOpcode::VCvtNEEBF162PS512 => X86Opcode::CVTDQ2PS,
        Avx10IselOpcode::VFnmaddBF16512
        | Avx10IselOpcode::VFmsubBF16512
        | Avx10IselOpcode::VFmaddBF16512 => X86Opcode::VFMADD231PS,
        // VNNI
        Avx10IselOpcode::VPDpBusd512
        | Avx10IselOpcode::VPDpBussd512
        | Avx10IselOpcode::VPDpWssd512
        | Avx10IselOpcode::VPDpWssds512
        | Avx10IselOpcode::VPDpBusds512
        | Avx10IselOpcode::VPDpWssd512_v2 => X86Opcode::MULPS,
        // IFMA
        Avx10IselOpcode::VPMadd52LUQ512 | Avx10IselOpcode::VPMadd52HUQ512 => X86Opcode::MULPS,
        // VBMI
        Avx10IselOpcode::VPermB512 | Avx10IselOpcode::VPermI2B512 => X86Opcode::PSHUFD,
        Avx10IselOpcode::VPermW512 | Avx10IselOpcode::VPermI2W512 => X86Opcode::PSHUFD,
        Avx10IselOpcode::VPMultishiftQB512 => X86Opcode::AND,
        Avx10IselOpcode::VPExpandB512 | Avx10IselOpcode::VPExpandW512 => X86Opcode::AND,
        Avx10IselOpcode::VPCompressB512 | Avx10IselOpcode::VPCompressW512 => X86Opcode::AND,
        Avx10IselOpcode::VPCompressD512 | Avx10IselOpcode::VPCompressQ512 => X86Opcode::AND,
        Avx10IselOpcode::VPExpandD512 | Avx10IselOpcode::VPExpandQ512 => X86Opcode::AND,
        // Mask move
        Avx10IselOpcode::VPMovB2M512
        | Avx10IselOpcode::VPMovW2M512
        | Avx10IselOpcode::VPMovD2M512
        | Avx10IselOpcode::VPMovQ2M512 => X86Opcode::MOV,
        Avx10IselOpcode::VPMovM2B512
        | Avx10IselOpcode::VPMovM2W512
        | Avx10IselOpcode::VPMovM2D512
        | Avx10IselOpcode::VPMovM2Q512 => X86Opcode::MOV,
        // AVX10.2 complex
        Avx10IselOpcode::TCMMRLFP16x
        | Avx10IselOpcode::TCMMILFP16x
        | Avx10IselOpcode::TCMMRLFP16x_512
        | Avx10IselOpcode::TCMMILFP16x_512 => X86Opcode::VFMADD231PS,
        // AVX10.2 TDPP
        Avx10IselOpcode::TDPPxBF16x | Avx10IselOpcode::TDPPxBF16x_512 => X86Opcode::VMULPS,
        // AVX10.2 MPS
        Avx10IselOpcode::VMPSMulW512 | Avx10IselOpcode::VMPSMulD512 => X86Opcode::VMULPS,
        Avx10IselOpcode::VMPSAddW512 | Avx10IselOpcode::VMPSAddD512 => X86Opcode::VADDPS,
        Avx10IselOpcode::VMPSSubW512 | Avx10IselOpcode::VMPSSubD512 => X86Opcode::VSUBPS,
        // FP16 complex
        Avx10IselOpcode::VFmaddCPH512 => X86Opcode::VFMADD231PS,
        Avx10IselOpcode::VFmsubCPH512 => X86Opcode::VFMSUB231PS,
        // Integer complex
        Avx10IselOpcode::VPMaddCWD512 | Avx10IselOpcode::VPMaddCSWD512 => X86Opcode::MULPS,
        // 256-bit placeholders
        Avx10IselOpcode::VAddPS256 => X86Opcode::VADDPS,
        Avx10IselOpcode::VAddPD256 => X86Opcode::VADDPD,
        Avx10IselOpcode::VSubPS256 => X86Opcode::VSUBPS,
        Avx10IselOpcode::VSubPD256 => X86Opcode::VSUBPD,
        Avx10IselOpcode::VMulPS256 => X86Opcode::VMULPS,
        Avx10IselOpcode::VMulPD256 => X86Opcode::VMULPD,
        Avx10IselOpcode::VDivPS256 => X86Opcode::VDIVPS,
        Avx10IselOpcode::VDivPD256 => X86Opcode::VDIVPD,
        Avx10IselOpcode::VPAddD256 => X86Opcode::VADDPS,
        Avx10IselOpcode::VPAddQ256 => X86Opcode::VADDPD,
        Avx10IselOpcode::VPSubD256 => X86Opcode::VSUBPS,
        Avx10IselOpcode::VPSubQ256 => X86Opcode::VSUBPD,
        Avx10IselOpcode::VPMulD256 => X86Opcode::VMULPS,
        Avx10IselOpcode::VPMulQ256 => X86Opcode::VMULPD,
        Avx10IselOpcode::VPAndD256 => X86Opcode::VANDPS,
        Avx10IselOpcode::VPAndQ256 => X86Opcode::VANDPD,
        Avx10IselOpcode::VPOrD256 => X86Opcode::VORPS,
        Avx10IselOpcode::VPOrQ256 => X86Opcode::VORPD,
        Avx10IselOpcode::VPXorD256 => X86Opcode::VXORPS,
        Avx10IselOpcode::VPXorQ256 => X86Opcode::VXORPD,
        Avx10IselOpcode::VSubPH256 => X86Opcode::VSUBPS,
        // VPCmp cases — base to CMP/ICmp combos
        Avx10IselOpcode::VPCmpD512
        | Avx10IselOpcode::VPCmpQ512
        | Avx10IselOpcode::VPCmpUD512
        | Avx10IselOpcode::VPCmpUQ512 => X86Opcode::CMP,
        // Scatter — base to STORE
        Avx10IselOpcode::VPScatterDD512
        | Avx10IselOpcode::VPScatterDQ512
        | Avx10IselOpcode::VPScatterQD512
        | Avx10IselOpcode::VPScatterQQ512 => X86Opcode::MOV,
    }
}

// ============================================================================
// AVX10 ISel Pattern Table
// ============================================================================

/// AVX10 ISel pattern descriptor.
#[derive(Debug, Clone)]
pub struct Avx10IselPattern {
    /// The IR opcode matched.
    pub ir_opcode: Opcode,
    /// Human-readable description.
    pub description: &'static str,
    /// AVX10 ISel opcode to emit.
    pub result_opcode: Avx10IselOpcode,
    /// Priority — lower is preferred when multiple patterns match.
    pub priority: u32,
    /// Number of source operands.
    pub num_src_operands: u8,
    /// Whether this is a 512-bit variant (requires has_512bit).
    pub is_512bit: bool,
    /// Whether this is a masked form.
    pub is_masked: bool,
    /// Required AVX10 feature string.
    pub required_feature: Option<&'static str>,
    /// Minimum AVX10 version.
    pub min_avx10_version: Avx10Version,
    /// Embedded rounding mode (None if not applicable).
    pub rounding_mode: Option<Avx10RoundingMode>,
}

/// Embedded rounding modes supported by AVX-512/AVX10.
#[derive(Debug, Clone, Copy, PartialEq, Eq)]
pub enum Avx10RoundingMode {
    /// Round to nearest even (default).
    RN,
    /// Round toward negative infinity.
    RD,
    /// Round toward positive infinity.
    RU,
    /// Round toward zero (truncate).
    RZ,
    /// Suppress all exceptions (SAE) — no rounding, just suppress.
    SAE,
}

impl Avx10RoundingMode {
    /// Encode the rounding mode as the immediate field for EVEX.
    pub fn encode(self) -> u8 {
        match self {
            Avx10RoundingMode::RN => 0b00,
            Avx10RoundingMode::RD => 0b01,
            Avx10RoundingMode::RU => 0b10,
            Avx10RoundingMode::RZ => 0b11,
            Avx10RoundingMode::SAE => 0b00, // SAE uses RC=00 with SAE bit set
        }
    }
}

/// Complete AVX10 ISel table.
pub struct Avx10IselTable {
    /// All AVX10 ISel patterns.
    pub patterns: Vec<Avx10IselPattern>,
    /// AVX10 ISel statistics.
    pub total_patterns: usize,
    pub patterns_512bit: usize,
    pub patterns_256bit: usize,
    pub patterns_masked: usize,
    pub patterns_avx10_2: usize,
    pub patterns_rounding: usize,
}

/// Create the AVX10 ISel pattern table.
pub fn avx10_isel_table() -> Vec<Avx10IselPattern> {
    let mut table = Vec::new();

    // ================================================================
    // AVX10.1 — 512-bit FP Arithmetic (Converged AVX-512F)
    // ================================================================
    table.push(Avx10IselPattern {
        ir_opcode: Opcode::FAdd,
        description: "vaddps zmm, zmm, zmm — AVX10 512-bit packed SP add",
        result_opcode: Avx10IselOpcode::VAddPS512,
        priority: 100,
        num_src_operands: 2,
        is_512bit: true,
        is_masked: false,
        required_feature: Some("avx10_512"),
        min_avx10_version: Avx10Version::V1,
        rounding_mode: None,
    });
    table.push(Avx10IselPattern {
        ir_opcode: Opcode::FAdd,
        description: "vaddpd zmm, zmm, zmm — AVX10 512-bit packed DP add",
        result_opcode: Avx10IselOpcode::VAddPD512,
        priority: 101,
        num_src_operands: 2,
        is_512bit: true,
        is_masked: false,
        required_feature: Some("avx10_512"),
        min_avx10_version: Avx10Version::V1,
        rounding_mode: None,
    });
    table.push(Avx10IselPattern {
        ir_opcode: Opcode::FSub,
        description: "vsubps zmm, zmm, zmm — AVX10 512-bit packed SP sub",
        result_opcode: Avx10IselOpcode::VSubPS512,
        priority: 100,
        num_src_operands: 2,
        is_512bit: true,
        is_masked: false,
        required_feature: Some("avx10_512"),
        min_avx10_version: Avx10Version::V1,
        rounding_mode: None,
    });
    table.push(Avx10IselPattern {
        ir_opcode: Opcode::FSub,
        description: "vsubpd zmm, zmm, zmm — AVX10 512-bit packed DP sub",
        result_opcode: Avx10IselOpcode::VSubPD512,
        priority: 101,
        num_src_operands: 2,
        is_512bit: true,
        is_masked: false,
        required_feature: Some("avx10_512"),
        min_avx10_version: Avx10Version::V1,
        rounding_mode: None,
    });
    table.push(Avx10IselPattern {
        ir_opcode: Opcode::FMul,
        description: "vmulps zmm, zmm, zmm — AVX10 512-bit packed SP mul",
        result_opcode: Avx10IselOpcode::VMulPS512,
        priority: 100,
        num_src_operands: 2,
        is_512bit: true,
        is_masked: false,
        required_feature: Some("avx10_512"),
        min_avx10_version: Avx10Version::V1,
        rounding_mode: None,
    });
    table.push(Avx10IselPattern {
        ir_opcode: Opcode::FMul,
        description: "vmulpd zmm, zmm, zmm — AVX10 512-bit packed DP mul",
        result_opcode: Avx10IselOpcode::VMulPD512,
        priority: 101,
        num_src_operands: 2,
        is_512bit: true,
        is_masked: false,
        required_feature: Some("avx10_512"),
        min_avx10_version: Avx10Version::V1,
        rounding_mode: None,
    });
    table.push(Avx10IselPattern {
        ir_opcode: Opcode::FDiv,
        description: "vdivps zmm, zmm, zmm — AVX10 512-bit packed SP div",
        result_opcode: Avx10IselOpcode::VDivPS512,
        priority: 100,
        num_src_operands: 2,
        is_512bit: true,
        is_masked: false,
        required_feature: Some("avx10_512"),
        min_avx10_version: Avx10Version::V1,
        rounding_mode: None,
    });
    table.push(Avx10IselPattern {
        ir_opcode: Opcode::FDiv,
        description: "vdivpd zmm, zmm, zmm — AVX10 512-bit packed DP div",
        result_opcode: Avx10IselOpcode::VDivPD512,
        priority: 101,
        num_src_operands: 2,
        is_512bit: true,
        is_masked: false,
        required_feature: Some("avx10_512"),
        min_avx10_version: Avx10Version::V1,
        rounding_mode: None,
    });

    // ================================================================
    // AVX10.1 — 512-bit Masked FP Arithmetic
    // ================================================================
    table.push(Avx10IselPattern {
        ir_opcode: Opcode::FAdd,
        description: "vaddps zmm{k1}, zmm, zmm — AVX10 512-bit masked SP add",
        result_opcode: Avx10IselOpcode::VAddPS512Mask,
        priority: 200,
        num_src_operands: 3,
        is_512bit: true,
        is_masked: true,
        required_feature: Some("avx10_512"),
        min_avx10_version: Avx10Version::V1,
        rounding_mode: None,
    });
    table.push(Avx10IselPattern {
        ir_opcode: Opcode::FAdd,
        description: "vaddpd zmm{k1}, zmm, zmm — AVX10 512-bit masked DP add",
        result_opcode: Avx10IselOpcode::VAddPD512Mask,
        priority: 201,
        num_src_operands: 3,
        is_512bit: true,
        is_masked: true,
        required_feature: Some("avx10_512"),
        min_avx10_version: Avx10Version::V1,
        rounding_mode: None,
    });
    table.push(Avx10IselPattern {
        ir_opcode: Opcode::FSub,
        description: "vsubps zmm{k1}, zmm, zmm — AVX10 512-bit masked SP sub",
        result_opcode: Avx10IselOpcode::VSubPS512Mask,
        priority: 200,
        num_src_operands: 3,
        is_512bit: true,
        is_masked: true,
        required_feature: Some("avx10_512"),
        min_avx10_version: Avx10Version::V1,
        rounding_mode: None,
    });
    table.push(Avx10IselPattern {
        ir_opcode: Opcode::FSub,
        description: "vsubpd zmm{k1}, zmm, zmm — AVX10 512-bit masked DP sub",
        result_opcode: Avx10IselOpcode::VSubPD512Mask,
        priority: 201,
        num_src_operands: 3,
        is_512bit: true,
        is_masked: true,
        required_feature: Some("avx10_512"),
        min_avx10_version: Avx10Version::V1,
        rounding_mode: None,
    });
    table.push(Avx10IselPattern {
        ir_opcode: Opcode::FMul,
        description: "vmulps zmm{k1}, zmm, zmm — AVX10 512-bit masked SP mul",
        result_opcode: Avx10IselOpcode::VMulPS512Mask,
        priority: 200,
        num_src_operands: 3,
        is_512bit: true,
        is_masked: true,
        required_feature: Some("avx10_512"),
        min_avx10_version: Avx10Version::V1,
        rounding_mode: None,
    });
    table.push(Avx10IselPattern {
        ir_opcode: Opcode::FMul,
        description: "vmulpd zmm{k1}, zmm, zmm — AVX10 512-bit masked DP mul",
        result_opcode: Avx10IselOpcode::VMulPD512Mask,
        priority: 201,
        num_src_operands: 3,
        is_512bit: true,
        is_masked: true,
        required_feature: Some("avx10_512"),
        min_avx10_version: Avx10Version::V1,
        rounding_mode: None,
    });

    // ================================================================
    // AVX10.1 — 512-bit Integer Arithmetic
    // ================================================================
    table.push(Avx10IselPattern {
        ir_opcode: Opcode::Add,
        description: "vpaddd zmm, zmm, zmm — AVX10 512-bit packed int32 add",
        result_opcode: Avx10IselOpcode::VPAddD512,
        priority: 100,
        num_src_operands: 2,
        is_512bit: true,
        is_masked: false,
        required_feature: Some("avx10_512"),
        min_avx10_version: Avx10Version::V1,
        rounding_mode: None,
    });
    table.push(Avx10IselPattern {
        ir_opcode: Opcode::Add,
        description: "vpaddq zmm, zmm, zmm — AVX10 512-bit packed int64 add",
        result_opcode: Avx10IselOpcode::VPAddQ512,
        priority: 101,
        num_src_operands: 2,
        is_512bit: true,
        is_masked: false,
        required_feature: Some("avx10_512"),
        min_avx10_version: Avx10Version::V1,
        rounding_mode: None,
    });
    table.push(Avx10IselPattern {
        ir_opcode: Opcode::Sub,
        description: "vpsubd zmm, zmm, zmm — AVX10 512-bit packed int32 sub",
        result_opcode: Avx10IselOpcode::VPSubD512,
        priority: 100,
        num_src_operands: 2,
        is_512bit: true,
        is_masked: false,
        required_feature: Some("avx10_512"),
        min_avx10_version: Avx10Version::V1,
        rounding_mode: None,
    });
    table.push(Avx10IselPattern {
        ir_opcode: Opcode::Sub,
        description: "vpsubq zmm, zmm, zmm — AVX10 512-bit packed int64 sub",
        result_opcode: Avx10IselOpcode::VPSubQ512,
        priority: 101,
        num_src_operands: 2,
        is_512bit: true,
        is_masked: false,
        required_feature: Some("avx10_512"),
        min_avx10_version: Avx10Version::V1,
        rounding_mode: None,
    });
    table.push(Avx10IselPattern {
        ir_opcode: Opcode::Mul,
        description: "vpmulld zmm, zmm, zmm — AVX10 512-bit packed int32 mul",
        result_opcode: Avx10IselOpcode::VPMulD512,
        priority: 100,
        num_src_operands: 2,
        is_512bit: true,
        is_masked: false,
        required_feature: Some("avx10_512"),
        min_avx10_version: Avx10Version::V1,
        rounding_mode: None,
    });
    table.push(Avx10IselPattern {
        ir_opcode: Opcode::Mul,
        description: "vpmullq zmm, zmm, zmm — AVX10 512-bit packed int64 mul",
        result_opcode: Avx10IselOpcode::VPMulQ512,
        priority: 101,
        num_src_operands: 2,
        is_512bit: true,
        is_masked: false,
        required_feature: Some("avx10_512"),
        min_avx10_version: Avx10Version::V1,
        rounding_mode: None,
    });
    table.push(Avx10IselPattern {
        ir_opcode: Opcode::And,
        description: "vpandd zmm, zmm, zmm — AVX10 512-bit packed int32 and",
        result_opcode: Avx10IselOpcode::VPAndD512,
        priority: 100,
        num_src_operands: 2,
        is_512bit: true,
        is_masked: false,
        required_feature: Some("avx10_512"),
        min_avx10_version: Avx10Version::V1,
        rounding_mode: None,
    });
    table.push(Avx10IselPattern {
        ir_opcode: Opcode::Or,
        description: "vpord zmm, zmm, zmm — AVX10 512-bit packed int32 or",
        result_opcode: Avx10IselOpcode::VPOrD512,
        priority: 100,
        num_src_operands: 2,
        is_512bit: true,
        is_masked: false,
        required_feature: Some("avx10_512"),
        min_avx10_version: Avx10Version::V1,
        rounding_mode: None,
    });
    table.push(Avx10IselPattern {
        ir_opcode: Opcode::Xor,
        description: "vpxord zmm, zmm, zmm — AVX10 512-bit packed int32 xor",
        result_opcode: Avx10IselOpcode::VPXorD512,
        priority: 100,
        num_src_operands: 2,
        is_512bit: true,
        is_masked: false,
        required_feature: Some("avx10_512"),
        min_avx10_version: Avx10Version::V1,
        rounding_mode: None,
    });

    // ================================================================
    // AVX10.1 — 512-bit BW/DQ Integer Byte/Word ops
    // ================================================================
    table.push(Avx10IselPattern {
        ir_opcode: Opcode::Add,
        description: "vpaddb zmm, zmm, zmm — AVX10 512-bit packed int8 add",
        result_opcode: Avx10IselOpcode::VPAddB512,
        priority: 110,
        num_src_operands: 2,
        is_512bit: true,
        is_masked: false,
        required_feature: Some("avx10_bw"),
        min_avx10_version: Avx10Version::V1,
        rounding_mode: None,
    });
    table.push(Avx10IselPattern {
        ir_opcode: Opcode::Add,
        description: "vpaddw zmm, zmm, zmm — AVX10 512-bit packed int16 add",
        result_opcode: Avx10IselOpcode::VPAddW512,
        priority: 111,
        num_src_operands: 2,
        is_512bit: true,
        is_masked: false,
        required_feature: Some("avx10_bw"),
        min_avx10_version: Avx10Version::V1,
        rounding_mode: None,
    });
    table.push(Avx10IselPattern {
        ir_opcode: Opcode::Sub,
        description: "vpsubb zmm, zmm, zmm — AVX10 512-bit packed int8 sub",
        result_opcode: Avx10IselOpcode::VPSubB512,
        priority: 110,
        num_src_operands: 2,
        is_512bit: true,
        is_masked: false,
        required_feature: Some("avx10_bw"),
        min_avx10_version: Avx10Version::V1,
        rounding_mode: None,
    });
    table.push(Avx10IselPattern {
        ir_opcode: Opcode::Sub,
        description: "vpsubw zmm, zmm, zmm — AVX10 512-bit packed int16 sub",
        result_opcode: Avx10IselOpcode::VPSubW512,
        priority: 111,
        num_src_operands: 2,
        is_512bit: true,
        is_masked: false,
        required_feature: Some("avx10_bw"),
        min_avx10_version: Avx10Version::V1,
        rounding_mode: None,
    });
    // Saturating add
    table.push(Avx10IselPattern {
        ir_opcode: Opcode::Add,
        description: "vpaddsb zmm, zmm, zmm — AVX10 512-bit saturating signed int8 add",
        result_opcode: Avx10IselOpcode::VPAddSB512,
        priority: 120,
        num_src_operands: 2,
        is_512bit: true,
        is_masked: false,
        required_feature: Some("avx10_bw"),
        min_avx10_version: Avx10Version::V1,
        rounding_mode: None,
    });
    table.push(Avx10IselPattern {
        ir_opcode: Opcode::Add,
        description: "vpaddsw zmm, zmm, zmm — AVX10 512-bit saturating signed int16 add",
        result_opcode: Avx10IselOpcode::VPAddSW512,
        priority: 121,
        num_src_operands: 2,
        is_512bit: true,
        is_masked: false,
        required_feature: Some("avx10_bw"),
        min_avx10_version: Avx10Version::V1,
        rounding_mode: None,
    });
    table.push(Avx10IselPattern {
        ir_opcode: Opcode::Add,
        description: "vpaddusb zmm, zmm, zmm — AVX10 512-bit saturating unsigned int8 add",
        result_opcode: Avx10IselOpcode::VPAddUSB512,
        priority: 122,
        num_src_operands: 2,
        is_512bit: true,
        is_masked: false,
        required_feature: Some("avx10_bw"),
        min_avx10_version: Avx10Version::V1,
        rounding_mode: None,
    });
    table.push(Avx10IselPattern {
        ir_opcode: Opcode::Add,
        description: "vpaddusw zmm, zmm, zmm — AVX10 512-bit saturating unsigned int16 add",
        result_opcode: Avx10IselOpcode::VPAddUSW512,
        priority: 123,
        num_src_operands: 2,
        is_512bit: true,
        is_masked: false,
        required_feature: Some("avx10_bw"),
        min_avx10_version: Avx10Version::V1,
        rounding_mode: None,
    });
    // Saturating sub
    table.push(Avx10IselPattern {
        ir_opcode: Opcode::Sub,
        description: "vpsubsb zmm, zmm, zmm — AVX10 512-bit saturating signed int8 sub",
        result_opcode: Avx10IselOpcode::VPSubSB512,
        priority: 120,
        num_src_operands: 2,
        is_512bit: true,
        is_masked: false,
        required_feature: Some("avx10_bw"),
        min_avx10_version: Avx10Version::V1,
        rounding_mode: None,
    });
    table.push(Avx10IselPattern {
        ir_opcode: Opcode::Sub,
        description: "vpsubsw zmm, zmm, zmm — AVX10 512-bit saturating signed int16 sub",
        result_opcode: Avx10IselOpcode::VPSubSW512,
        priority: 121,
        num_src_operands: 2,
        is_512bit: true,
        is_masked: false,
        required_feature: Some("avx10_bw"),
        min_avx10_version: Avx10Version::V1,
        rounding_mode: None,
    });
    table.push(Avx10IselPattern {
        ir_opcode: Opcode::Sub,
        description: "vpsubusb zmm, zmm, zmm — AVX10 512-bit saturating unsigned int8 sub",
        result_opcode: Avx10IselOpcode::VPSubUSB512,
        priority: 122,
        num_src_operands: 2,
        is_512bit: true,
        is_masked: false,
        required_feature: Some("avx10_bw"),
        min_avx10_version: Avx10Version::V1,
        rounding_mode: None,
    });
    table.push(Avx10IselPattern {
        ir_opcode: Opcode::Sub,
        description: "vpsubusw zmm, zmm, zmm — AVX10 512-bit saturating unsigned int16 sub",
        result_opcode: Avx10IselOpcode::VPSubUSW512,
        priority: 123,
        num_src_operands: 2,
        is_512bit: true,
        is_masked: false,
        required_feature: Some("avx10_bw"),
        min_avx10_version: Avx10Version::V1,
        rounding_mode: None,
    });

    // ================================================================
    // AVX10.1 — 512-bit Min/Max
    // ================================================================
    table.push(Avx10IselPattern {
        ir_opcode: Opcode::ICmp,
        description: "vpminsb zmm, zmm, zmm — AVX10 512-bit signed int8 min",
        result_opcode: Avx10IselOpcode::VPMinSB512,
        priority: 130,
        num_src_operands: 2,
        is_512bit: true,
        is_masked: false,
        required_feature: Some("avx10_bw"),
        min_avx10_version: Avx10Version::V1,
        rounding_mode: None,
    });
    table.push(Avx10IselPattern {
        ir_opcode: Opcode::ICmp,
        description: "vpmaxsb zmm, zmm, zmm — AVX10 512-bit signed int8 max",
        result_opcode: Avx10IselOpcode::VPMaxSB512,
        priority: 131,
        num_src_operands: 2,
        is_512bit: true,
        is_masked: false,
        required_feature: Some("avx10_bw"),
        min_avx10_version: Avx10Version::V1,
        rounding_mode: None,
    });
    table.push(Avx10IselPattern {
        ir_opcode: Opcode::ICmp,
        description: "vpminub zmm, zmm, zmm — AVX10 512-bit unsigned int8 min",
        result_opcode: Avx10IselOpcode::VPMinUB512,
        priority: 132,
        num_src_operands: 2,
        is_512bit: true,
        is_masked: false,
        required_feature: Some("avx10_bw"),
        min_avx10_version: Avx10Version::V1,
        rounding_mode: None,
    });
    table.push(Avx10IselPattern {
        ir_opcode: Opcode::ICmp,
        description: "vpmaxub zmm, zmm, zmm — AVX10 512-bit unsigned int8 max",
        result_opcode: Avx10IselOpcode::VPMaxUB512,
        priority: 133,
        num_src_operands: 2,
        is_512bit: true,
        is_masked: false,
        required_feature: Some("avx10_bw"),
        min_avx10_version: Avx10Version::V1,
        rounding_mode: None,
    });
    table.push(Avx10IselPattern {
        ir_opcode: Opcode::ICmp,
        description: "vpminsw zmm, zmm, zmm — AVX10 512-bit signed int16 min",
        result_opcode: Avx10IselOpcode::VPMinSW512,
        priority: 134,
        num_src_operands: 2,
        is_512bit: true,
        is_masked: false,
        required_feature: Some("avx10_bw"),
        min_avx10_version: Avx10Version::V1,
        rounding_mode: None,
    });
    table.push(Avx10IselPattern {
        ir_opcode: Opcode::ICmp,
        description: "vpmaxsw zmm, zmm, zmm — AVX10 512-bit signed int16 max",
        result_opcode: Avx10IselOpcode::VPMaxSW512,
        priority: 135,
        num_src_operands: 2,
        is_512bit: true,
        is_masked: false,
        required_feature: Some("avx10_bw"),
        min_avx10_version: Avx10Version::V1,
        rounding_mode: None,
    });
    table.push(Avx10IselPattern {
        ir_opcode: Opcode::ICmp,
        description: "vpminuw zmm, zmm, zmm — AVX10 512-bit unsigned int16 min",
        result_opcode: Avx10IselOpcode::VPMinUW512,
        priority: 136,
        num_src_operands: 2,
        is_512bit: true,
        is_masked: false,
        required_feature: Some("avx10_bw"),
        min_avx10_version: Avx10Version::V1,
        rounding_mode: None,
    });
    table.push(Avx10IselPattern {
        ir_opcode: Opcode::ICmp,
        description: "vpmaxuw zmm, zmm, zmm — AVX10 512-bit unsigned int16 max",
        result_opcode: Avx10IselOpcode::VPMaxUW512,
        priority: 137,
        num_src_operands: 2,
        is_512bit: true,
        is_masked: false,
        required_feature: Some("avx10_bw"),
        min_avx10_version: Avx10Version::V1,
        rounding_mode: None,
    });

    // ================================================================
    // AVX10.1 — 512-bit Permute / Shuffle / Blend
    // ================================================================
    table.push(Avx10IselPattern {
        ir_opcode: Opcode::ShuffleVector,
        description: "vpermq zmm, zmm, imm8 — AVX10 512-bit qword permute",
        result_opcode: Avx10IselOpcode::VPermQ512,
        priority: 100,
        num_src_operands: 2,
        is_512bit: true,
        is_masked: false,
        required_feature: Some("avx10_512"),
        min_avx10_version: Avx10Version::V1,
        rounding_mode: None,
    });
    table.push(Avx10IselPattern {
        ir_opcode: Opcode::ShuffleVector,
        description: "vpermd zmm, zmm, zmm — AVX10 512-bit dword permute",
        result_opcode: Avx10IselOpcode::VPermD512,
        priority: 101,
        num_src_operands: 2,
        is_512bit: true,
        is_masked: false,
        required_feature: Some("avx10_512"),
        min_avx10_version: Avx10Version::V1,
        rounding_mode: None,
    });
    table.push(Avx10IselPattern {
        ir_opcode: Opcode::ShuffleVector,
        description: "vshuff32x4 zmm, zmm, zmm, imm8 — AVX10 512-bit shuffle f32x4",
        result_opcode: Avx10IselOpcode::VShufF32X4,
        priority: 102,
        num_src_operands: 2,
        is_512bit: true,
        is_masked: false,
        required_feature: Some("avx10_512"),
        min_avx10_version: Avx10Version::V1,
        rounding_mode: None,
    });
    table.push(Avx10IselPattern {
        ir_opcode: Opcode::ShuffleVector,
        description: "vshuff64x2 zmm, zmm, zmm, imm8 — AVX10 512-bit shuffle f64x2",
        result_opcode: Avx10IselOpcode::VShufF64X2,
        priority: 103,
        num_src_operands: 2,
        is_512bit: true,
        is_masked: false,
        required_feature: Some("avx10_512"),
        min_avx10_version: Avx10Version::V1,
        rounding_mode: None,
    });
    table.push(Avx10IselPattern {
        ir_opcode: Opcode::ShuffleVector,
        description: "vshufi32x4 zmm, zmm, zmm, imm8 — AVX10 512-bit shuffle i32x4",
        result_opcode: Avx10IselOpcode::VShufI32X4,
        priority: 104,
        num_src_operands: 2,
        is_512bit: true,
        is_masked: false,
        required_feature: Some("avx10_512"),
        min_avx10_version: Avx10Version::V1,
        rounding_mode: None,
    });
    table.push(Avx10IselPattern {
        ir_opcode: Opcode::ShuffleVector,
        description: "vshufi64x2 zmm, zmm, zmm, imm8 — AVX10 512-bit shuffle i64x2",
        result_opcode: Avx10IselOpcode::VShufI64X2,
        priority: 105,
        num_src_operands: 2,
        is_512bit: true,
        is_masked: false,
        required_feature: Some("avx10_512"),
        min_avx10_version: Avx10Version::V1,
        rounding_mode: None,
    });
    // Blend
    table.push(Avx10IselPattern {
        ir_opcode: Opcode::Select,
        description: "vblendmps zmm{k1}, zmm, zmm — AVX10 512-bit masked blend PS",
        result_opcode: Avx10IselOpcode::VBlendMPS512,
        priority: 100,
        num_src_operands: 3,
        is_512bit: true,
        is_masked: true,
        required_feature: Some("avx10_512"),
        min_avx10_version: Avx10Version::V1,
        rounding_mode: None,
    });
    table.push(Avx10IselPattern {
        ir_opcode: Opcode::Select,
        description: "vblendmpd zmm{k1}, zmm, zmm — AVX10 512-bit masked blend PD",
        result_opcode: Avx10IselOpcode::VBlendMPD512,
        priority: 101,
        num_src_operands: 3,
        is_512bit: true,
        is_masked: true,
        required_feature: Some("avx10_512"),
        min_avx10_version: Avx10Version::V1,
        rounding_mode: None,
    });
    table.push(Avx10IselPattern {
        ir_opcode: Opcode::Select,
        description: "vpblendmd zmm{k1}, zmm, zmm — AVX10 512-bit masked blend D",
        result_opcode: Avx10IselOpcode::VPBlendMD512,
        priority: 102,
        num_src_operands: 3,
        is_512bit: true,
        is_masked: true,
        required_feature: Some("avx10_512"),
        min_avx10_version: Avx10Version::V1,
        rounding_mode: None,
    });
    table.push(Avx10IselPattern {
        ir_opcode: Opcode::Select,
        description: "vpblendmq zmm{k1}, zmm, zmm — AVX10 512-bit masked blend Q",
        result_opcode: Avx10IselOpcode::VPBlendMQ512,
        priority: 103,
        num_src_operands: 3,
        is_512bit: true,
        is_masked: true,
        required_feature: Some("avx10_512"),
        min_avx10_version: Avx10Version::V1,
        rounding_mode: None,
    });

    // ================================================================
    // AVX10.1 — Broadcast
    // ================================================================
    table.push(Avx10IselPattern {
        ir_opcode: Opcode::InsertElement,
        description: "vbroadcastss zmm, xmm — AVX10 512-bit broadcast float32",
        result_opcode: Avx10IselOpcode::VBroadcastSS512,
        priority: 100,
        num_src_operands: 1,
        is_512bit: true,
        is_masked: false,
        required_feature: Some("avx10_512"),
        min_avx10_version: Avx10Version::V1,
        rounding_mode: None,
    });
    table.push(Avx10IselPattern {
        ir_opcode: Opcode::InsertElement,
        description: "vbroadcastsd zmm, xmm — AVX10 512-bit broadcast float64",
        result_opcode: Avx10IselOpcode::VBroadcastSD512,
        priority: 101,
        num_src_operands: 1,
        is_512bit: true,
        is_masked: false,
        required_feature: Some("avx10_512"),
        min_avx10_version: Avx10Version::V1,
        rounding_mode: None,
    });
    table.push(Avx10IselPattern {
        ir_opcode: Opcode::InsertElement,
        description: "vbroadcasti32x4 zmm, mem128 — AVX10 512-bit broadcast 4×i32",
        result_opcode: Avx10IselOpcode::VBroadcastI32X4,
        priority: 102,
        num_src_operands: 1,
        is_512bit: true,
        is_masked: false,
        required_feature: Some("avx10_512"),
        min_avx10_version: Avx10Version::V1,
        rounding_mode: None,
    });
    table.push(Avx10IselPattern {
        ir_opcode: Opcode::InsertElement,
        description: "vbroadcasti64x2 zmm, mem128 — AVX10 512-bit broadcast 2×i64",
        result_opcode: Avx10IselOpcode::VBroadcastI64X2,
        priority: 103,
        num_src_operands: 1,
        is_512bit: true,
        is_masked: false,
        required_feature: Some("avx10_512"),
        min_avx10_version: Avx10Version::V1,
        rounding_mode: None,
    });

    // ================================================================
    // AVX10.1 — Extract/Insert
    // ================================================================
    table.push(Avx10IselPattern {
        ir_opcode: Opcode::ExtractElement,
        description: "vextractf32x4 xmm, zmm, imm8 — AVX10 extract 128-bit float32 from 512-bit",
        result_opcode: Avx10IselOpcode::VExtractF32X4,
        priority: 100,
        num_src_operands: 2,
        is_512bit: true,
        is_masked: false,
        required_feature: Some("avx10_512"),
        min_avx10_version: Avx10Version::V1,
        rounding_mode: None,
    });
    table.push(Avx10IselPattern {
        ir_opcode: Opcode::ExtractElement,
        description: "vextractf64x2 xmm, zmm, imm8 — AVX10 extract 128-bit float64 from 512-bit",
        result_opcode: Avx10IselOpcode::VExtractF64X2,
        priority: 101,
        num_src_operands: 2,
        is_512bit: true,
        is_masked: false,
        required_feature: Some("avx10_512"),
        min_avx10_version: Avx10Version::V1,
        rounding_mode: None,
    });
    table.push(Avx10IselPattern {
        ir_opcode: Opcode::ExtractElement,
        description: "vextracti32x4 xmm, zmm, imm8 — AVX10 extract 128-bit int32 from 512-bit",
        result_opcode: Avx10IselOpcode::VExtractI32X4,
        priority: 102,
        num_src_operands: 2,
        is_512bit: true,
        is_masked: false,
        required_feature: Some("avx10_512"),
        min_avx10_version: Avx10Version::V1,
        rounding_mode: None,
    });
    table.push(Avx10IselPattern {
        ir_opcode: Opcode::InsertElement,
        description: "vinsertf32x4 zmm, zmm, xmm, imm8 — AVX10 insert 128-bit float32 into 512-bit",
        result_opcode: Avx10IselOpcode::VInsertF32X4,
        priority: 104,
        num_src_operands: 3,
        is_512bit: true,
        is_masked: false,
        required_feature: Some("avx10_512"),
        min_avx10_version: Avx10Version::V1,
        rounding_mode: None,
    });
    table.push(Avx10IselPattern {
        ir_opcode: Opcode::InsertElement,
        description: "vinsertf64x2 zmm, zmm, xmm, imm8 — AVX10 insert 128-bit float64 into 512-bit",
        result_opcode: Avx10IselOpcode::VInsertF64X2,
        priority: 105,
        num_src_operands: 3,
        is_512bit: true,
        is_masked: false,
        required_feature: Some("avx10_512"),
        min_avx10_version: Avx10Version::V1,
        rounding_mode: None,
    });

    // ================================================================
    // AVX10.1 — Gather / Scatter
    // ================================================================
    table.push(Avx10IselPattern {
        ir_opcode: Opcode::Load,
        description: "vpgatherdd zmm, [base+zmm*scale] — AVX10 512-bit gather dword to dword",
        result_opcode: Avx10IselOpcode::VPGatherDD512,
        priority: 100,
        num_src_operands: 2,
        is_512bit: true,
        is_masked: false,
        required_feature: Some("avx10_512"),
        min_avx10_version: Avx10Version::V1,
        rounding_mode: None,
    });
    table.push(Avx10IselPattern {
        ir_opcode: Opcode::Load,
        description: "vpgatherdq zmm, [base+ymm*scale] — AVX10 512-bit gather dword to qword",
        result_opcode: Avx10IselOpcode::VPGatherDQ512,
        priority: 101,
        num_src_operands: 2,
        is_512bit: true,
        is_masked: false,
        required_feature: Some("avx10_512"),
        min_avx10_version: Avx10Version::V1,
        rounding_mode: None,
    });
    table.push(Avx10IselPattern {
        ir_opcode: Opcode::Load,
        description: "vpgatherqd xmm, [base+zmm*scale] — AVX10 512-bit gather qword to dword",
        result_opcode: Avx10IselOpcode::VPGatherQD512,
        priority: 102,
        num_src_operands: 2,
        is_512bit: true,
        is_masked: false,
        required_feature: Some("avx10_512"),
        min_avx10_version: Avx10Version::V1,
        rounding_mode: None,
    });
    table.push(Avx10IselPattern {
        ir_opcode: Opcode::Load,
        description: "vpgatherqq zmm, [base+zmm*scale] — AVX10 512-bit gather qword to qword",
        result_opcode: Avx10IselOpcode::VPGatherQQ512,
        priority: 103,
        num_src_operands: 2,
        is_512bit: true,
        is_masked: false,
        required_feature: Some("avx10_512"),
        min_avx10_version: Avx10Version::V1,
        rounding_mode: None,
    });
    table.push(Avx10IselPattern {
        ir_opcode: Opcode::Store,
        description: "vpscatterdd [base+zmm*scale], zmm — AVX10 512-bit scatter dword",
        result_opcode: Avx10IselOpcode::VPScatterDD512,
        priority: 100,
        num_src_operands: 2,
        is_512bit: true,
        is_masked: false,
        required_feature: Some("avx10_512"),
        min_avx10_version: Avx10Version::V1,
        rounding_mode: None,
    });
    table.push(Avx10IselPattern {
        ir_opcode: Opcode::Store,
        description: "vpscatterdq [base+ymm*scale], zmm — AVX10 512-bit scatter dword to qword ptr",
        result_opcode: Avx10IselOpcode::VPScatterDQ512,
        priority: 101,
        num_src_operands: 2,
        is_512bit: true,
        is_masked: false,
        required_feature: Some("avx10_512"),
        min_avx10_version: Avx10Version::V1,
        rounding_mode: None,
    });
    table.push(Avx10IselPattern {
        ir_opcode: Opcode::Store,
        description: "vpscatterqd [base+zmm*scale], xmm — AVX10 512-bit scatter qword ptr to dword",
        result_opcode: Avx10IselOpcode::VPScatterQD512,
        priority: 102,
        num_src_operands: 2,
        is_512bit: true,
        is_masked: false,
        required_feature: Some("avx10_512"),
        min_avx10_version: Avx10Version::V1,
        rounding_mode: None,
    });
    table.push(Avx10IselPattern {
        ir_opcode: Opcode::Store,
        description: "vpscatterqq [base+zmm*scale], zmm — AVX10 512-bit scatter qword to qword ptr",
        result_opcode: Avx10IselOpcode::VPScatterQQ512,
        priority: 103,
        num_src_operands: 2,
        is_512bit: true,
        is_masked: false,
        required_feature: Some("avx10_512"),
        min_avx10_version: Avx10Version::V1,
        rounding_mode: None,
    });

    // ================================================================
    // AVX10.1 — FP16 Converged
    // ================================================================
    table.push(Avx10IselPattern {
        ir_opcode: Opcode::FAdd,
        description: "vaddph zmm, zmm, zmm — AVX10 FP16 512-bit packed add",
        result_opcode: Avx10IselOpcode::VAddPH512,
        priority: 150,
        num_src_operands: 2,
        is_512bit: true,
        is_masked: false,
        required_feature: Some("avx10_fp16"),
        min_avx10_version: Avx10Version::V1,
        rounding_mode: None,
    });
    table.push(Avx10IselPattern {
        ir_opcode: Opcode::FSub,
        description: "vsubph zmm, zmm, zmm — AVX10 FP16 512-bit packed sub",
        result_opcode: Avx10IselOpcode::VSubPH512,
        priority: 150,
        num_src_operands: 2,
        is_512bit: true,
        is_masked: false,
        required_feature: Some("avx10_fp16"),
        min_avx10_version: Avx10Version::V1,
        rounding_mode: None,
    });
    table.push(Avx10IselPattern {
        ir_opcode: Opcode::FMul,
        description: "vmulph zmm, zmm, zmm — AVX10 FP16 512-bit packed mul",
        result_opcode: Avx10IselOpcode::VMulPH512,
        priority: 150,
        num_src_operands: 2,
        is_512bit: true,
        is_masked: false,
        required_feature: Some("avx10_fp16"),
        min_avx10_version: Avx10Version::V1,
        rounding_mode: None,
    });
    table.push(Avx10IselPattern {
        ir_opcode: Opcode::FDiv,
        description: "vdivph zmm, zmm, zmm — AVX10 FP16 512-bit packed div",
        result_opcode: Avx10IselOpcode::VDivPH512,
        priority: 150,
        num_src_operands: 2,
        is_512bit: true,
        is_masked: false,
        required_feature: Some("avx10_fp16"),
        min_avx10_version: Avx10Version::V1,
        rounding_mode: None,
    });
    table.push(Avx10IselPattern {
        ir_opcode: Opcode::FAdd,
        description: "vfmadd231ph zmm, zmm, zmm — AVX10 FP16 FMA",
        result_opcode: Avx10IselOpcode::VFmaddPH512,
        priority: 151,
        num_src_operands: 3,
        is_512bit: true,
        is_masked: false,
        required_feature: Some("avx10_fp16"),
        min_avx10_version: Avx10Version::V1,
        rounding_mode: None,
    });
    table.push(Avx10IselPattern {
        ir_opcode: Opcode::FAdd,
        description: "vfnmadd231ph zmm, zmm, zmm — AVX10 FP16 negated FMA",
        result_opcode: Avx10IselOpcode::VFnmaddPH512,
        priority: 152,
        num_src_operands: 3,
        is_512bit: true,
        is_masked: false,
        required_feature: Some("avx10_fp16"),
        min_avx10_version: Avx10Version::V1,
        rounding_mode: None,
    });
    table.push(Avx10IselPattern {
        ir_opcode: Opcode::FAdd,
        description: "vfmsub231ph zmm, zmm, zmm — AVX10 FP16 FMS",
        result_opcode: Avx10IselOpcode::VFmsubPH512,
        priority: 153,
        num_src_operands: 3,
        is_512bit: true,
        is_masked: false,
        required_feature: Some("avx10_fp16"),
        min_avx10_version: Avx10Version::V1,
        rounding_mode: None,
    });
    table.push(Avx10IselPattern {
        ir_opcode: Opcode::FAdd,
        description: "vfnmsub231ph zmm, zmm, zmm — AVX10 FP16 negated FMS",
        result_opcode: Avx10IselOpcode::VFnmsubPH512,
        priority: 154,
        num_src_operands: 3,
        is_512bit: true,
        is_masked: false,
        required_feature: Some("avx10_fp16"),
        min_avx10_version: Avx10Version::V1,
        rounding_mode: None,
    });

    // ================================================================
    // AVX10.1 — BF16 Converged
    // ================================================================
    table.push(Avx10IselPattern {
        ir_opcode: Opcode::Mul,
        description: "vdpbf16ps zmm, zmm, zmm — AVX10 BF16 dot product",
        result_opcode: Avx10IselOpcode::VDPBF16PS512,
        priority: 160,
        num_src_operands: 3,
        is_512bit: true,
        is_masked: false,
        required_feature: Some("avx10_bf16"),
        min_avx10_version: Avx10Version::V1,
        rounding_mode: None,
    });
    table.push(Avx10IselPattern {
        ir_opcode: Opcode::FPTrunc,
        description: "vcvtne2ps2bf16 zmm, zmm, zmm — AVX10 convert 2×FP32 to BF16",
        result_opcode: Avx10IselOpcode::VCvtNE2PS2BF16_512,
        priority: 161,
        num_src_operands: 2,
        is_512bit: true,
        is_masked: false,
        required_feature: Some("avx10_bf16"),
        min_avx10_version: Avx10Version::V1,
        rounding_mode: None,
    });

    // ================================================================
    // AVX10.1 — VNNI Converged
    // ================================================================
    table.push(Avx10IselPattern {
        ir_opcode: Opcode::Add,
        description: "vpdpbusd zmm, zmm, zmm — AVX10 VNNI u8×s8→s32 dot product",
        result_opcode: Avx10IselOpcode::VPDpBusd512,
        priority: 170,
        num_src_operands: 3,
        is_512bit: true,
        is_masked: false,
        required_feature: Some("avx10_vnni"),
        min_avx10_version: Avx10Version::V1,
        rounding_mode: None,
    });
    table.push(Avx10IselPattern {
        ir_opcode: Opcode::Add,
        description: "vpdpbussd zmm, zmm, zmm — AVX10 VNNI s8×s8→s32 dot product",
        result_opcode: Avx10IselOpcode::VPDpBussd512,
        priority: 171,
        num_src_operands: 3,
        is_512bit: true,
        is_masked: false,
        required_feature: Some("avx10_vnni"),
        min_avx10_version: Avx10Version::V1,
        rounding_mode: None,
    });
    table.push(Avx10IselPattern {
        ir_opcode: Opcode::Add,
        description: "vpdpwssd zmm, zmm, zmm — AVX10 VNNI u16×s16→s32 dot product",
        result_opcode: Avx10IselOpcode::VPDpWssd512,
        priority: 172,
        num_src_operands: 3,
        is_512bit: true,
        is_masked: false,
        required_feature: Some("avx10_vnni"),
        min_avx10_version: Avx10Version::V1,
        rounding_mode: None,
    });
    table.push(Avx10IselPattern {
        ir_opcode: Opcode::Add,
        description: "vpdpwssds zmm, zmm, zmm — AVX10 VNNI s16×s16→s32+s32 dot product",
        result_opcode: Avx10IselOpcode::VPDpWssds512,
        priority: 173,
        num_src_operands: 3,
        is_512bit: true,
        is_masked: false,
        required_feature: Some("avx10_vnni"),
        min_avx10_version: Avx10Version::V1,
        rounding_mode: None,
    });

    // ================================================================
    // AVX10.2 — TCMMxFP16x (Complex Matrix Multiply FP16)
    // ================================================================
    table.push(Avx10IselPattern {
        ir_opcode: Opcode::FAdd,
        description: "tcmmlfp16ps — AVX10.2 real-part complex FP16 matrix multiply",
        result_opcode: Avx10IselOpcode::TCMMRLFP16x,
        priority: 200,
        num_src_operands: 3,
        is_512bit: true,
        is_masked: false,
        required_feature: Some("avx10_2_tcmm_fp16"),
        min_avx10_version: Avx10Version::V2,
        rounding_mode: None,
    });
    table.push(Avx10IselPattern {
        ir_opcode: Opcode::FAdd,
        description: "tcmmilfp16ps — AVX10.2 imaginary-part complex FP16 matrix multiply",
        result_opcode: Avx10IselOpcode::TCMMILFP16x,
        priority: 201,
        num_src_operands: 3,
        is_512bit: true,
        is_masked: false,
        required_feature: Some("avx10_2_tcmm_fp16"),
        min_avx10_version: Avx10Version::V2,
        rounding_mode: None,
    });

    // ================================================================
    // AVX10.2 — TDPPxBF16x (Tile Dot Product BF16)
    // ================================================================
    table.push(Avx10IselPattern {
        ir_opcode: Opcode::FAdd,
        description: "tdppbf16ps — AVX10.2 tile dot product with BF16 accumulation",
        result_opcode: Avx10IselOpcode::TDPPxBF16x,
        priority: 200,
        num_src_operands: 3,
        is_512bit: true,
        is_masked: false,
        required_feature: Some("avx10_2_tdpp_bf16"),
        min_avx10_version: Avx10Version::V2,
        rounding_mode: None,
    });

    // ================================================================
    // AVX10.2 — MPS (Multi-Precision Shift)
    // ================================================================
    table.push(Avx10IselPattern {
        ir_opcode: Opcode::Mul,
        description: "vmpsmulvw — AVX10.2 MPS multiply vector word",
        result_opcode: Avx10IselOpcode::VMPSMulW512,
        priority: 200,
        num_src_operands: 2,
        is_512bit: true,
        is_masked: false,
        required_feature: Some("avx10_2_mps"),
        min_avx10_version: Avx10Version::V2,
        rounding_mode: None,
    });
    table.push(Avx10IselPattern {
        ir_opcode: Opcode::Mul,
        description: "vmpsmulvd — AVX10.2 MPS multiply vector dword",
        result_opcode: Avx10IselOpcode::VMPSMulD512,
        priority: 201,
        num_src_operands: 2,
        is_512bit: true,
        is_masked: false,
        required_feature: Some("avx10_2_mps"),
        min_avx10_version: Avx10Version::V2,
        rounding_mode: None,
    });
    table.push(Avx10IselPattern {
        ir_opcode: Opcode::Add,
        description: "vmpsaddvw — AVX10.2 MPS add vector word",
        result_opcode: Avx10IselOpcode::VMPSAddW512,
        priority: 202,
        num_src_operands: 2,
        is_512bit: true,
        is_masked: false,
        required_feature: Some("avx10_2_mps"),
        min_avx10_version: Avx10Version::V2,
        rounding_mode: None,
    });
    table.push(Avx10IselPattern {
        ir_opcode: Opcode::Add,
        description: "vmpsaddvd — AVX10.2 MPS add vector dword",
        result_opcode: Avx10IselOpcode::VMPSAddD512,
        priority: 203,
        num_src_operands: 2,
        is_512bit: true,
        is_masked: false,
        required_feature: Some("avx10_2_mps"),
        min_avx10_version: Avx10Version::V2,
        rounding_mode: None,
    });

    // ================================================================
    // AVX10.1 — 256-bit Mandatory (E-core)
    // ================================================================
    table.push(Avx10IselPattern {
        ir_opcode: Opcode::FAdd,
        description: "vaddps ymm, ymm, ymm — AVX10 256-bit packed SP add (mandatory)",
        result_opcode: Avx10IselOpcode::VAddPS256,
        priority: 50,
        num_src_operands: 2,
        is_512bit: false,
        is_masked: false,
        required_feature: Some("avx10"),
        min_avx10_version: Avx10Version::V1,
        rounding_mode: None,
    });
    table.push(Avx10IselPattern {
        ir_opcode: Opcode::FAdd,
        description: "vaddpd ymm, ymm, ymm — AVX10 256-bit packed DP add (mandatory)",
        result_opcode: Avx10IselOpcode::VAddPD256,
        priority: 51,
        num_src_operands: 2,
        is_512bit: false,
        is_masked: false,
        required_feature: Some("avx10"),
        min_avx10_version: Avx10Version::V1,
        rounding_mode: None,
    });
    table.push(Avx10IselPattern {
        ir_opcode: Opcode::FSub,
        description: "vsubps ymm, ymm, ymm — AVX10 256-bit packed SP sub (mandatory)",
        result_opcode: Avx10IselOpcode::VSubPS256,
        priority: 50,
        num_src_operands: 2,
        is_512bit: false,
        is_masked: false,
        required_feature: Some("avx10"),
        min_avx10_version: Avx10Version::V1,
        rounding_mode: None,
    });
    table.push(Avx10IselPattern {
        ir_opcode: Opcode::FSub,
        description: "vsubpd ymm, ymm, ymm — AVX10 256-bit packed DP sub (mandatory)",
        result_opcode: Avx10IselOpcode::VSubPD256,
        priority: 51,
        num_src_operands: 2,
        is_512bit: false,
        is_masked: false,
        required_feature: Some("avx10"),
        min_avx10_version: Avx10Version::V1,
        rounding_mode: None,
    });
    table.push(Avx10IselPattern {
        ir_opcode: Opcode::FMul,
        description: "vmulps ymm, ymm, ymm — AVX10 256-bit packed SP mul (mandatory)",
        result_opcode: Avx10IselOpcode::VMulPS256,
        priority: 50,
        num_src_operands: 2,
        is_512bit: false,
        is_masked: false,
        required_feature: Some("avx10"),
        min_avx10_version: Avx10Version::V1,
        rounding_mode: None,
    });
    table.push(Avx10IselPattern {
        ir_opcode: Opcode::FMul,
        description: "vmulpd ymm, ymm, ymm — AVX10 256-bit packed DP mul (mandatory)",
        result_opcode: Avx10IselOpcode::VMulPD256,
        priority: 51,
        num_src_operands: 2,
        is_512bit: false,
        is_masked: false,
        required_feature: Some("avx10"),
        min_avx10_version: Avx10Version::V1,
        rounding_mode: None,
    });
    table.push(Avx10IselPattern {
        ir_opcode: Opcode::Add,
        description: "vpaddd ymm, ymm, ymm — AVX10 256-bit packed int32 add (mandatory)",
        result_opcode: Avx10IselOpcode::VPAddD256,
        priority: 50,
        num_src_operands: 2,
        is_512bit: false,
        is_masked: false,
        required_feature: Some("avx10"),
        min_avx10_version: Avx10Version::V1,
        rounding_mode: None,
    });
    table.push(Avx10IselPattern {
        ir_opcode: Opcode::Add,
        description: "vpaddq ymm, ymm, ymm — AVX10 256-bit packed int64 add (mandatory)",
        result_opcode: Avx10IselOpcode::VPAddQ256,
        priority: 51,
        num_src_operands: 2,
        is_512bit: false,
        is_masked: false,
        required_feature: Some("avx10"),
        min_avx10_version: Avx10Version::V1,
        rounding_mode: None,
    });

    // ================================================================
    // AVX10.1 — Embedded Rounding variants
    // ================================================================
    for (op, rounding, desc_suffix, prio_base) in &[
        (
            Avx10IselOpcode::VAddPS512_RN,
            Avx10RoundingMode::RN,
            "RN",
            300u32,
        ),
        (
            Avx10IselOpcode::VAddPS512_RU,
            Avx10RoundingMode::RU,
            "RU",
            301,
        ),
        (
            Avx10IselOpcode::VAddPS512_RD,
            Avx10RoundingMode::RD,
            "RD",
            302,
        ),
        (
            Avx10IselOpcode::VAddPS512_RZ,
            Avx10RoundingMode::RZ,
            "RZ",
            303,
        ),
        (
            Avx10IselOpcode::VAddPS512_SAE,
            Avx10RoundingMode::SAE,
            "SAE",
            304,
        ),
        (
            Avx10IselOpcode::VAddPD512_RN,
            Avx10RoundingMode::RN,
            "RN",
            305,
        ),
        (
            Avx10IselOpcode::VAddPD512_RU,
            Avx10RoundingMode::RU,
            "RU",
            306,
        ),
        (
            Avx10IselOpcode::VAddPD512_RD,
            Avx10RoundingMode::RD,
            "RD",
            307,
        ),
        (
            Avx10IselOpcode::VAddPD512_RZ,
            Avx10RoundingMode::RZ,
            "RZ",
            308,
        ),
        (
            Avx10IselOpcode::VAddPD512_SAE,
            Avx10RoundingMode::SAE,
            "SAE",
            309,
        ),
        (
            Avx10IselOpcode::VMulPS512_RN,
            Avx10RoundingMode::RN,
            "RN",
            310,
        ),
        (
            Avx10IselOpcode::VMulPS512_RU,
            Avx10RoundingMode::RU,
            "RU",
            311,
        ),
        (
            Avx10IselOpcode::VMulPS512_RD,
            Avx10RoundingMode::RD,
            "RD",
            312,
        ),
        (
            Avx10IselOpcode::VMulPS512_RZ,
            Avx10RoundingMode::RZ,
            "RZ",
            313,
        ),
        (
            Avx10IselOpcode::VMulPS512_SAE,
            Avx10RoundingMode::SAE,
            "SAE",
            314,
        ),
        (
            Avx10IselOpcode::VMulPD512_RN,
            Avx10RoundingMode::RN,
            "RN",
            315,
        ),
        (
            Avx10IselOpcode::VMulPD512_RU,
            Avx10RoundingMode::RU,
            "RU",
            316,
        ),
        (
            Avx10IselOpcode::VMulPD512_RD,
            Avx10RoundingMode::RD,
            "RD",
            317,
        ),
        (
            Avx10IselOpcode::VMulPD512_RZ,
            Avx10RoundingMode::RZ,
            "RZ",
            318,
        ),
        (
            Avx10IselOpcode::VMulPD512_SAE,
            Avx10RoundingMode::SAE,
            "SAE",
            319,
        ),
        (
            Avx10IselOpcode::VFmaddPS512_RN,
            Avx10RoundingMode::RN,
            "RN",
            320,
        ),
        (
            Avx10IselOpcode::VFmaddPS512_RU,
            Avx10RoundingMode::RU,
            "RU",
            321,
        ),
        (
            Avx10IselOpcode::VFmaddPS512_RD,
            Avx10RoundingMode::RD,
            "RD",
            322,
        ),
        (
            Avx10IselOpcode::VFmaddPS512_RZ,
            Avx10RoundingMode::RZ,
            "RZ",
            323,
        ),
        (
            Avx10IselOpcode::VFmaddPS512_SAE,
            Avx10RoundingMode::SAE,
            "SAE",
            324,
        ),
    ] {
        table.push(Avx10IselPattern {
            ir_opcode: Opcode::FAdd,
            description: "AVX10 512-bit FP arithmetic with embedded rounding",
            result_opcode: *op,
            priority: *prio_base,
            num_src_operands: 2,
            is_512bit: true,
            is_masked: false,
            required_feature: Some("avx10_512_er"),
            min_avx10_version: Avx10Version::V1,
            rounding_mode: Some(*rounding),
        });
    }

    table
}

/// Construct a full AVX10 ISel table from the pattern vector.
pub fn build_avx10_isel_table() -> Avx10IselTable {
    let patterns = avx10_isel_table();
    let total = patterns.len();
    let p512 = patterns.iter().filter(|p| p.is_512bit).count();
    let p256 = patterns.iter().filter(|p| !p.is_512bit).count();
    let pmasked = patterns.iter().filter(|p| p.is_masked).count();
    let pavx102 = patterns
        .iter()
        .filter(|p| p.min_avx10_version.is_v2())
        .count();
    let pround = patterns
        .iter()
        .filter(|p| p.rounding_mode.is_some())
        .count();

    Avx10IselTable {
        patterns,
        total_patterns: total,
        patterns_512bit: p512,
        patterns_256bit: p256,
        patterns_masked: pmasked,
        patterns_avx10_2: pavx102,
        patterns_rounding: pround,
    }
}

// ============================================================================
// AVX10 ISel Engine
// ============================================================================

/// AVX10 instruction selection engine.
/// Consults the AVX10 ISel table and target features to lower IR ops
/// to AVX10 machine operations.
pub struct Avx10IselEngine {
    /// Pre-built AVX10 ISel table.
    pub table: Avx10IselTable,
    /// Target AVX10 features.
    pub features: Avx10Features,
    /// Virtual register map.
    pub vreg_map: HashMap<usize, VirtReg>,
}

impl Avx10IselEngine {
    /// Create a new AVX10 ISel engine with the given features.
    pub fn new(features: Avx10Features) -> Self {
        let table = build_avx10_isel_table();
        Self {
            table,
            features,
            vreg_map: HashMap::new(),
        }
    }

    /// Check whether a pattern is applicable to the current target.
    pub fn is_pattern_applicable(&self, pattern: &Avx10IselPattern) -> bool {
        if pattern.min_avx10_version > self.features.version {
            return false;
        }
        if pattern.is_512bit && !self.features.has_512bit {
            return false;
        }
        if let Some(feat) = pattern.required_feature {
            if !self.features.has_feature(feat) {
                return false;
            }
        }
        true
    }

    /// Select the best AVX10 pattern for a given IR opcode.
    /// Returns the pattern with the lowest priority among applicable patterns.
    pub fn select_pattern(&self, ir_opcodes: &[Opcode]) -> Option<&Avx10IselPattern> {
        let mut best: Option<&Avx10IselPattern> = None;
        for p in &self.table.patterns {
            if ir_opcodes.contains(&p.ir_opcode) && self.is_pattern_applicable(p) {
                match best {
                    None => best = Some(p),
                    Some(b) if p.priority < b.priority => best = Some(p),
                    _ => {}
                }
            }
        }
        best
    }

    /// Emit a machine instruction from an AVX10 ISel pattern.
    pub fn emit_instr(
        &self,
        pattern: &Avx10IselPattern,
        dest: VirtReg,
        srcs: &[VirtReg],
    ) -> MachineInstr {
        let x86_op = avx10_isel_to_x86_opcode(pattern.result_opcode);
        let mut mi = MachineInstr::new(x86_op as u32);
        mi.def = Some(dest);
        mi.push_reg(dest);
        for &s in srcs {
            mi.push_reg(s);
        }
        mi
    }

    /// Get statistics about the AVX10 ISel table.
    pub fn stats(&self) -> String {
        format!(
            "AVX10 ISel: {} patterns (512-bit: {}, 256-bit: {}, masked: {}, AVX10.2: {}, rounding: {})",
            self.table.total_patterns,
            self.table.patterns_512bit,
            self.table.patterns_256bit,
            self.table.patterns_masked,
            self.table.patterns_avx10_2,
            self.table.patterns_rounding,
        )
    }
}

// ============================================================================
// APX — Advanced Performance Extensions
// ============================================================================

/// APX feature flags.
#[derive(Debug, Clone, Copy, PartialEq, Eq)]
pub struct ApxFeatures {
    /// REX2 prefix support (EGPR r16-r31 accessible).
    pub has_rex2: bool,
    /// Non-destructive destination (NDD) three-operand forms.
    pub has_ndd: bool,
    /// PUSH2/POP2 instructions (push/pop two GPRs at once).
    pub has_push2_pop2: bool,
    /// Conditional compare (CCMP) and conditional test (CTEST).
    pub has_ccmp_ctest: bool,
    /// Zero-upper (ZU) semantics for GPR writes that zero upper bits.
    pub has_zero_upper: bool,
    /// Extended GPR count (32 vs 16).
    pub egpr_count: u8,
}

impl Default for ApxFeatures {
    fn default() -> Self {
        Self {
            has_rex2: false,
            has_ndd: false,
            has_push2_pop2: false,
            has_ccmp_ctest: false,
            has_zero_upper: false,
            egpr_count: 16,
        }
    }
}

impl ApxFeatures {
    /// Create a full APX feature set with all extensions enabled.
    pub fn apx_full() -> Self {
        Self {
            has_rex2: true,
            has_ndd: true,
            has_push2_pop2: true,
            has_ccmp_ctest: true,
            has_zero_upper: true,
            egpr_count: 32,
        }
    }

    /// Whether EGPR registers (r16-r31) are available.
    pub fn has_egpr(&self) -> bool {
        self.has_rex2 && self.egpr_count > 16
    }

    /// Return the available GPR register range as (min, max+1).
    pub fn gpr_range(&self) -> (u8, u8) {
        if self.has_egpr() {
            (0, 32)
        } else {
            (0, 16)
        }
    }
}

/// APX opcode variants for instruction selection.
#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)]
pub enum ApxIselOpcode {
    // === NDD (non-destructive destination) forms ===
    /// ADD with NDD: `add ndd, src1, src2` — 3-operand, non-destructive
    AddNDD,
    SubNDD,
    AndNDD,
    OrNDD,
    XorNDD,
    AdcNDD,
    SbbNDD,
    IMulNDD,
    ShlNDD,
    ShrNDD,
    SarNDD,
    RolNDD,
    RorNDD,
    /// NEG with NDD: `neg ndd, src`
    NegNDD,
    /// NOT with NDD: `not ndd, src`
    NotNDD,
    /// INC/DEC with NDD
    IncNDD,
    DecNDD,

    // === PUSH2/POP2 ===
    /// PUSH2: push two GPRs in a single instruction
    PUSH2,
    /// POP2: pop two GPRs in a single instruction
    POP2,

    // === CCMP/CTEST ===
    /// CCMP: conditional compare — sets flags based on sub of src1, src2,
    /// masked by the given condition code.
    CCMP,
    /// CTEST: conditional test — sets flags based on AND of src1, src2,
    /// masked by the given condition code.
    CTEST,

    // === Zero-Upper (ZU) ===
    /// ADD with zero-upper semantics: upper 32 bits of dest zeroed.
    AddZU,
    SubZU,
    IMulZU,
    /// MOV with ZU: zero upper 32 bits of dest.
    MovZU,
    /// IMUL with ZU.
    MulZU,

    // === EGPR (r16-r31) register allocation hints ===
    /// MOV to/from EGPR (r16-r31).
    MovEGPR,
    /// ADD using EGPR.
    AddEGPR,
    /// SUB using EGPR.
    SubEGPR,
    /// LEA with EGPR base/index.
    LeaEGPR,
}

/// Convert an APX ISel opcode to its canonical X86Opcode.
pub fn apx_isel_to_x86_opcode(op: ApxIselOpcode) -> X86Opcode {
    match op {
        ApxIselOpcode::AddNDD | ApxIselOpcode::AddZU | ApxIselOpcode::AddEGPR => X86Opcode::ADD,
        ApxIselOpcode::SubNDD | ApxIselOpcode::SubZU | ApxIselOpcode::SubEGPR => X86Opcode::SUB,
        ApxIselOpcode::AndNDD => X86Opcode::AND,
        ApxIselOpcode::OrNDD => X86Opcode::OR,
        ApxIselOpcode::XorNDD => X86Opcode::XOR,
        ApxIselOpcode::AdcNDD => X86Opcode::ADC,
        ApxIselOpcode::SbbNDD => X86Opcode::SBB,
        ApxIselOpcode::IMulNDD | ApxIselOpcode::MulZU | ApxIselOpcode::IMulZU => X86Opcode::IMUL,
        ApxIselOpcode::ShlNDD => X86Opcode::SHL,
        ApxIselOpcode::ShrNDD => X86Opcode::SHR,
        ApxIselOpcode::SarNDD => X86Opcode::SAR,
        ApxIselOpcode::RolNDD => X86Opcode::ROL,
        ApxIselOpcode::RorNDD => X86Opcode::ROR,
        ApxIselOpcode::NegNDD => X86Opcode::NEG,
        ApxIselOpcode::NotNDD => X86Opcode::NOT,
        ApxIselOpcode::IncNDD => X86Opcode::INC,
        ApxIselOpcode::DecNDD => X86Opcode::DEC,
        ApxIselOpcode::PUSH2 => X86Opcode::PUSH,
        ApxIselOpcode::POP2 => X86Opcode::POP,
        ApxIselOpcode::CCMP => X86Opcode::CMP,
        ApxIselOpcode::CTEST => X86Opcode::TEST,
        ApxIselOpcode::MovZU | ApxIselOpcode::MovEGPR => X86Opcode::MOV,
        ApxIselOpcode::LeaEGPR => X86Opcode::LEA,
    }
}

/// APX ISel pattern descriptor.
#[derive(Debug, Clone)]
pub struct ApxIselPattern {
    /// The IR opcode matched.
    pub ir_opcode: Opcode,
    /// Human-readable description.
    pub description: &'static str,
    /// APX ISel opcode to emit.
    pub result_opcode: ApxIselOpcode,
    /// Priority.
    pub priority: u32,
    /// Number of source operands.
    pub num_src_operands: u8,
    /// Required APX sub-feature.
    pub required_feature: Option<&'static str>,
    /// Whether EGPR registers are preferred for this pattern.
    pub prefer_egpr: bool,
}

/// Complete APX ISel table.
pub struct ApxIselTable {
    pub patterns: Vec<ApxIselPattern>,
    pub total_patterns: usize,
    pub ndd_patterns: usize,
    pub push2_pop2_patterns: usize,
    pub ccmp_ctest_patterns: usize,
    pub zu_patterns: usize,
}

/// Create the APX ISel pattern table.
pub fn apx_isel_table() -> Vec<ApxIselPattern> {
    let mut table = Vec::new();

    // ================================================================
    // APX NDD — Non-Destructive Destination three-operand forms
    // ================================================================
    table.push(ApxIselPattern {
        ir_opcode: Opcode::Add,
        description: "add ndd, src1, src2 — APX NDD 3-operand add",
        result_opcode: ApxIselOpcode::AddNDD,
        priority: 100,
        num_src_operands: 3,
        required_feature: Some("apx_ndd"),
        prefer_egpr: false,
    });
    table.push(ApxIselPattern {
        ir_opcode: Opcode::Sub,
        description: "sub ndd, src1, src2 — APX NDD 3-operand sub",
        result_opcode: ApxIselOpcode::SubNDD,
        priority: 100,
        num_src_operands: 3,
        required_feature: Some("apx_ndd"),
        prefer_egpr: false,
    });
    table.push(ApxIselPattern {
        ir_opcode: Opcode::And,
        description: "and ndd, src1, src2 — APX NDD 3-operand and",
        result_opcode: ApxIselOpcode::AndNDD,
        priority: 100,
        num_src_operands: 3,
        required_feature: Some("apx_ndd"),
        prefer_egpr: false,
    });
    table.push(ApxIselPattern {
        ir_opcode: Opcode::Or,
        description: "or ndd, src1, src2 — APX NDD 3-operand or",
        result_opcode: ApxIselOpcode::OrNDD,
        priority: 100,
        num_src_operands: 3,
        required_feature: Some("apx_ndd"),
        prefer_egpr: false,
    });
    table.push(ApxIselPattern {
        ir_opcode: Opcode::Xor,
        description: "xor ndd, src1, src2 — APX NDD 3-operand xor",
        result_opcode: ApxIselOpcode::XorNDD,
        priority: 100,
        num_src_operands: 3,
        required_feature: Some("apx_ndd"),
        prefer_egpr: false,
    });
    table.push(ApxIselPattern {
        ir_opcode: Opcode::Mul,
        description: "imul ndd, src1, src2 — APX NDD 3-operand signed mul",
        result_opcode: ApxIselOpcode::IMulNDD,
        priority: 100,
        num_src_operands: 3,
        required_feature: Some("apx_ndd"),
        prefer_egpr: false,
    });
    table.push(ApxIselPattern {
        ir_opcode: Opcode::Shl,
        description: "shl ndd, src1, src2 — APX NDD 3-operand shift left",
        result_opcode: ApxIselOpcode::ShlNDD,
        priority: 100,
        num_src_operands: 3,
        required_feature: Some("apx_ndd"),
        prefer_egpr: false,
    });
    table.push(ApxIselPattern {
        ir_opcode: Opcode::LShr,
        description: "shr ndd, src1, src2 — APX NDD 3-operand logical shift right",
        result_opcode: ApxIselOpcode::ShrNDD,
        priority: 100,
        num_src_operands: 3,
        required_feature: Some("apx_ndd"),
        prefer_egpr: false,
    });
    table.push(ApxIselPattern {
        ir_opcode: Opcode::AShr,
        description: "sar ndd, src1, src2 — APX NDD 3-operand arithmetic shift right",
        result_opcode: ApxIselOpcode::SarNDD,
        priority: 100,
        num_src_operands: 3,
        required_feature: Some("apx_ndd"),
        prefer_egpr: false,
    });
    table.push(ApxIselPattern {
        ir_opcode: Opcode::Sub,
        description: "neg ndd, src — APX NDD 2-operand neg",
        result_opcode: ApxIselOpcode::NegNDD,
        priority: 101,
        num_src_operands: 2,
        required_feature: Some("apx_ndd"),
        prefer_egpr: false,
    });
    table.push(ApxIselPattern {
        ir_opcode: Opcode::Xor,
        description: "not ndd, src — APX NDD 2-operand not",
        result_opcode: ApxIselOpcode::NotNDD,
        priority: 101,
        num_src_operands: 2,
        required_feature: Some("apx_ndd"),
        prefer_egpr: false,
    });
    table.push(ApxIselPattern {
        ir_opcode: Opcode::Add,
        description: "inc ndd, src — APX NDD 2-operand inc",
        result_opcode: ApxIselOpcode::IncNDD,
        priority: 102,
        num_src_operands: 2,
        required_feature: Some("apx_ndd"),
        prefer_egpr: false,
    });
    table.push(ApxIselPattern {
        ir_opcode: Opcode::Sub,
        description: "dec ndd, src — APX NDD 2-operand dec",
        result_opcode: ApxIselOpcode::DecNDD,
        priority: 102,
        num_src_operands: 2,
        required_feature: Some("apx_ndd"),
        prefer_egpr: false,
    });

    // ================================================================
    // APX PUSH2/POP2
    // ================================================================
    table.push(ApxIselPattern {
        ir_opcode: Opcode::Call,
        description: "push2 r1, r2 — APX push two GPRs for function prologue",
        result_opcode: ApxIselOpcode::PUSH2,
        priority: 200,
        num_src_operands: 2,
        required_feature: Some("apx_push2_pop2"),
        prefer_egpr: false,
    });
    table.push(ApxIselPattern {
        ir_opcode: Opcode::Ret,
        description: "pop2 r1, r2 — APX pop two GPRs for function epilogue",
        result_opcode: ApxIselOpcode::POP2,
        priority: 200,
        num_src_operands: 2,
        required_feature: Some("apx_push2_pop2"),
        prefer_egpr: false,
    });

    // ================================================================
    // APX CCMP/CTEST — Conditional Compare and Test
    // ================================================================
    table.push(ApxIselPattern {
        ir_opcode: Opcode::ICmp,
        description: "ccmp src1, src2, cond — APX conditional compare",
        result_opcode: ApxIselOpcode::CCMP,
        priority: 300,
        num_src_operands: 3,
        required_feature: Some("apx_ccmp_ctest"),
        prefer_egpr: false,
    });
    table.push(ApxIselPattern {
        ir_opcode: Opcode::And,
        description: "ctest src1, src2, cond — APX conditional test",
        result_opcode: ApxIselOpcode::CTEST,
        priority: 300,
        num_src_operands: 3,
        required_feature: Some("apx_ccmp_ctest"),
        prefer_egpr: false,
    });

    // ================================================================
    // APX Zero-Upper (ZU) forms
    // ================================================================
    table.push(ApxIselPattern {
        ir_opcode: Opcode::Add,
        description: "addzu ndd, src1, src2 — APX add with zero upper 32 bits",
        result_opcode: ApxIselOpcode::AddZU,
        priority: 400,
        num_src_operands: 3,
        required_feature: Some("apx_zu"),
        prefer_egpr: false,
    });
    table.push(ApxIselPattern {
        ir_opcode: Opcode::Sub,
        description: "subzu ndd, src1, src2 — APX sub with zero upper 32 bits",
        result_opcode: ApxIselOpcode::SubZU,
        priority: 400,
        num_src_operands: 3,
        required_feature: Some("apx_zu"),
        prefer_egpr: false,
    });
    table.push(ApxIselPattern {
        ir_opcode: Opcode::Mul,
        description: "imulzu ndd, src1, src2 — APX mul with zero upper 32 bits",
        result_opcode: ApxIselOpcode::IMulZU,
        priority: 400,
        num_src_operands: 3,
        required_feature: Some("apx_zu"),
        prefer_egpr: false,
    });

    // ================================================================
    // APX EGPR — Extended GPR (r16-r31) register allocation hints
    // ================================================================
    table.push(ApxIselPattern {
        ir_opcode: Opcode::Add,
        description: "add r_dst(EGPR), r_src1, r_src2 — APX EGPR add",
        result_opcode: ApxIselOpcode::AddEGPR,
        priority: 500,
        num_src_operands: 3,
        required_feature: Some("apx_rex2"),
        prefer_egpr: true,
    });
    table.push(ApxIselPattern {
        ir_opcode: Opcode::Sub,
        description: "sub r_dst(EGPR), r_src1, r_src2 — APX EGPR sub",
        result_opcode: ApxIselOpcode::SubEGPR,
        priority: 500,
        num_src_operands: 3,
        required_feature: Some("apx_rex2"),
        prefer_egpr: true,
    });
    table.push(ApxIselPattern {
        ir_opcode: Opcode::Load,
        description: "mov r_dst(EGPR), [mem] — APX EGPR load",
        result_opcode: ApxIselOpcode::MovEGPR,
        priority: 500,
        num_src_operands: 2,
        required_feature: Some("apx_rex2"),
        prefer_egpr: true,
    });
    table.push(ApxIselPattern {
        ir_opcode: Opcode::Store,
        description: "mov [mem], r_src(EGPR) — APX EGPR store",
        result_opcode: ApxIselOpcode::MovEGPR,
        priority: 501,
        num_src_operands: 2,
        required_feature: Some("apx_rex2"),
        prefer_egpr: true,
    });
    table.push(ApxIselPattern {
        ir_opcode: Opcode::GetElementPtr,
        description: "lea r_dst(EGPR), [base+index*scale+disp] — APX EGPR LEA",
        result_opcode: ApxIselOpcode::LeaEGPR,
        priority: 500,
        num_src_operands: 3,
        required_feature: Some("apx_rex2"),
        prefer_egpr: true,
    });

    table
}

/// Build the APX ISel table from the pattern vector.
pub fn build_apx_isel_table() -> ApxIselTable {
    let patterns = apx_isel_table();
    let total = patterns.len();
    let ndd = patterns
        .iter()
        .filter(|p| matches!(p.required_feature, Some("apx_ndd")))
        .count();
    let push2 = patterns
        .iter()
        .filter(|p| matches!(p.required_feature, Some("apx_push2_pop2")))
        .count();
    let ccmp = patterns
        .iter()
        .filter(|p| matches!(p.required_feature, Some("apx_ccmp_ctest")))
        .count();
    let zu = patterns
        .iter()
        .filter(|p| matches!(p.required_feature, Some("apx_zu")))
        .count();

    ApxIselTable {
        patterns,
        total_patterns: total,
        ndd_patterns: ndd,
        push2_pop2_patterns: push2,
        ccmp_ctest_patterns: ccmp,
        zu_patterns: zu,
    }
}

/// APX instruction selection engine.
pub struct ApxIselEngine {
    pub table: ApxIselTable,
    pub features: ApxFeatures,
    pub vreg_map: HashMap<usize, VirtReg>,
}

impl ApxIselEngine {
    /// Create a new APX ISel engine.
    pub fn new(features: ApxFeatures) -> Self {
        let table = build_apx_isel_table();
        Self {
            table,
            features,
            vreg_map: HashMap::new(),
        }
    }

    /// Check whether a pattern is applicable to the current target.
    pub fn is_pattern_applicable(&self, pattern: &ApxIselPattern) -> bool {
        match pattern.required_feature {
            Some("apx_ndd") if !self.features.has_ndd => false,
            Some("apx_push2_pop2") if !self.features.has_push2_pop2 => false,
            Some("apx_ccmp_ctest") if !self.features.has_ccmp_ctest => false,
            Some("apx_zu") if !self.features.has_zero_upper => false,
            Some("apx_rex2") if !self.features.has_rex2 => false,
            _ => true,
        }
    }

    /// Select the best APX pattern for a given IR opcode.
    pub fn select_pattern(&self, ir_opcodes: &[Opcode]) -> Option<&ApxIselPattern> {
        let mut best: Option<&ApxIselPattern> = None;
        for p in &self.table.patterns {
            if ir_opcodes.contains(&p.ir_opcode) && self.is_pattern_applicable(p) {
                match best {
                    None => best = Some(p),
                    Some(b) if p.priority < b.priority => best = Some(p),
                    _ => {}
                }
            }
        }
        best
    }

    /// Emit a machine instruction from an APX ISel pattern.
    pub fn emit_instr(
        &self,
        pattern: &ApxIselPattern,
        dest: VirtReg,
        srcs: &[VirtReg],
    ) -> MachineInstr {
        let x86_op = apx_isel_to_x86_opcode(pattern.result_opcode);
        let mut mi = MachineInstr::new(x86_op as u32);
        mi.def = Some(dest);
        mi.push_reg(dest);
        for &s in srcs {
            mi.push_reg(s);
        }
        mi
    }

    /// Get statistics about the APX ISel table.
    pub fn stats(&self) -> String {
        format!(
            "APX ISel: {} patterns (NDD: {}, PUSH2/POP2: {}, CCMP/CTEST: {}, ZU: {})",
            self.table.total_patterns,
            self.table.ndd_patterns,
            self.table.push2_pop2_patterns,
            self.table.ccmp_ctest_patterns,
            self.table.zu_patterns,
        )
    }
}

// ============================================================================
// AVX10 + APX Combined ISel Dispatch
// ============================================================================

/// Combined AVX10 + APX instruction selection dispatcher.
/// Queries both engines and selects the best pattern.
pub struct Avx10ApxCombinedISel {
    pub avx10_engine: Avx10IselEngine,
    pub apx_engine: ApxIselEngine,
}

impl Avx10ApxCombinedISel {
    /// Create a new combined ISel dispatcher.
    pub fn new(avx10_features: Avx10Features, apx_features: ApxFeatures) -> Self {
        Self {
            avx10_engine: Avx10IselEngine::new(avx10_features),
            apx_engine: ApxIselEngine::new(apx_features),
        }
    }

    /// Select the best machine instruction for a given IR opcode.
    /// Tries APX patterns first (higher priority for GPR ops), then AVX10.
    pub fn select_combined(&self, ir_opcode: Opcode) -> Option<(String, MachineInstr)> {
        let opcodes = &[ir_opcode];
        // Check APX first for GPR ops
        if let Some(pat) = self.apx_engine.select_pattern(opcodes) {
            let mi = self.apx_engine.emit_instr(pat, 0, &[]);
            return Some((format!("APX: {}", pat.description), mi));
        }
        // Then AVX10 for vector ops
        if let Some(pat) = self.avx10_engine.select_pattern(opcodes) {
            let mi = self.avx10_engine.emit_instr(pat, 0, &[]);
            return Some((format!("AVX10: {}", pat.description), mi));
        }
        None
    }

    /// Combined statistics.
    pub fn combined_stats(&self) -> String {
        format!(
            "Combined ISel:\n  {}\n  {}\n  Total: {} patterns",
            self.avx10_engine.stats(),
            self.apx_engine.stats(),
            self.avx10_engine.table.total_patterns + self.apx_engine.table.total_patterns,
        )
    }
}

#[cfg(test)]
mod tests {
    use super::*;

    #[test]
    fn test_avx10_version_ordering() {
        assert!(Avx10Version::V2 > Avx10Version::V1);
        assert_eq!(Avx10Version::V1.as_u32(), 1);
        assert_eq!(Avx10Version::V2.as_u32(), 2);
    }

    #[test]
    fn test_avx10_features_default() {
        let f = Avx10Features::default();
        assert_eq!(f.version, Avx10Version::V1);
        assert!(!f.has_512bit);
    }

    #[test]
    fn test_avx10_features_full() {
        let f = Avx10Features::avx10_2_full();
        assert_eq!(f.version, Avx10Version::V2);
        assert!(f.has_512bit);
        assert!(f.has_tcmm_fp16);
        assert!(f.has_tdpp_bf16);
        assert!(f.has_mps);
    }

    #[test]
    fn test_avx10_e_core() {
        let f = Avx10Features::avx10_e_core();
        assert!(!f.has_512bit);
        assert!(f.has_converged_avx512);
    }

    #[test]
    fn test_avx10_feature_query() {
        let f = Avx10Features::avx10_1_full();
        assert!(f.has_feature("avx512f"));
        assert!(f.has_feature("avx512bf16"));
        assert!(!f.has_feature("avx10_tcmm_fp16"));
    }

    #[test]
    fn test_avx10_version_report() {
        let f = Avx10Features::avx10_1_full();
        let report = Avx10VersionReport::detect(Avx10Version::V1, &f);
        assert_eq!(report.version, 1);
        assert_eq!(report.max_vector_bit_width, 512);
    }

    #[test]
    fn test_apx_features_default() {
        let f = ApxFeatures::default();
        assert!(!f.has_rex2);
        assert_eq!(f.egpr_count, 16);
    }

    #[test]
    fn test_apx_features_full() {
        let f = ApxFeatures::apx_full();
        assert!(f.has_rex2);
        assert!(f.has_egpr());
        assert_eq!(f.egpr_count, 32);
    }

    #[test]
    fn test_apx_gpr_range() {
        let f_default = ApxFeatures::default();
        assert_eq!(f_default.gpr_range(), (0, 16));

        let f_full = ApxFeatures::apx_full();
        assert_eq!(f_full.gpr_range(), (0, 32));
    }

    #[test]
    fn test_avx10_isel_table_builds() {
        let table = build_avx10_isel_table();
        assert!(table.total_patterns > 50);
        assert!(table.patterns_512bit > 0);
        assert!(table.patterns_256bit > 0);
    }

    #[test]
    fn test_apx_isel_table_builds() {
        let table = build_apx_isel_table();
        assert!(table.total_patterns > 10);
        assert!(table.ndd_patterns > 0);
    }

    #[test]
    fn test_avx10_isel_engine_select() {
        let engine = Avx10IselEngine::new(Avx10Features::avx10_1_full());
        let pat = engine.select_pattern(&[Opcode::FAdd]);
        assert!(pat.is_some());
        assert!(pat.unwrap().is_512bit);
    }

    #[test]
    fn test_avx10_isel_engine_e_core_select() {
        let engine = Avx10IselEngine::new(Avx10Features::avx10_e_core());
        let pat = engine.select_pattern(&[Opcode::FAdd]);
        assert!(pat.is_some());
        // E-core should pick 256-bit patterns (non-512bit)
        assert!(!pat.unwrap().is_512bit);
    }

    #[test]
    fn test_apx_isel_engine_select() {
        let engine = ApxIselEngine::new(ApxFeatures::apx_full());
        let pat = engine.select_pattern(&[Opcode::Add]);
        assert!(pat.is_some());
        // Should prefer NDD over EGPR (lower priority)
        assert!(pat.unwrap().priority < 500);
    }

    #[test]
    fn test_combined_isel() {
        let combined =
            Avx10ApxCombinedISel::new(Avx10Features::avx10_1_full(), ApxFeatures::apx_full());
        // Integer add should hit APX first
        let result = combined.select_combined(Opcode::Add);
        assert!(result.is_some());
        assert!(result.unwrap().0.contains("APX"));

        // Float add should hit AVX10
        let result = combined.select_combined(Opcode::FAdd);
        assert!(result.is_some());
        assert!(result.unwrap().0.contains("AVX10"));
    }

    #[test]
    fn test_avx10_isel_opcode_conversion() {
        assert_eq!(
            avx10_isel_to_x86_opcode(Avx10IselOpcode::VAddPS512),
            X86Opcode::VADDPS
        );
        assert_eq!(
            avx10_isel_to_x86_opcode(Avx10IselOpcode::VAddPD256),
            X86Opcode::VADDPD
        );
        assert_eq!(
            avx10_isel_to_x86_opcode(Avx10IselOpcode::VPSubD512),
            X86Opcode::VSUBPS
        );
    }

    #[test]
    fn test_apx_isel_opcode_conversion() {
        assert_eq!(
            apx_isel_to_x86_opcode(ApxIselOpcode::AddNDD),
            X86Opcode::ADD
        );
        assert_eq!(
            apx_isel_to_x86_opcode(ApxIselOpcode::PUSH2),
            X86Opcode::PUSH
        );
        assert_eq!(apx_isel_to_x86_opcode(ApxIselOpcode::CCMP), X86Opcode::CMP);
    }

    #[test]
    fn test_rounding_mode_encode() {
        assert_eq!(Avx10RoundingMode::RN.encode(), 0b00);
        assert_eq!(Avx10RoundingMode::RD.encode(), 0b01);
        assert_eq!(Avx10RoundingMode::RU.encode(), 0b10);
        assert_eq!(Avx10RoundingMode::RZ.encode(), 0b11);
    }

    #[test]
    fn test_avx10_isel_pattern_applicability() {
        let engine = Avx10IselEngine::new(Avx10Features::avx10_e_core());
        // 512-bit pattern should not be applicable on E-core
        let pat512 = Avx10IselPattern {
            ir_opcode: Opcode::FAdd,
            description: "test",
            result_opcode: Avx10IselOpcode::VAddPS512,
            priority: 100,
            num_src_operands: 2,
            is_512bit: true,
            is_masked: false,
            required_feature: Some("avx10_512"),
            min_avx10_version: Avx10Version::V1,
            rounding_mode: None,
        };
        assert!(!engine.is_pattern_applicable(&pat512));

        // 256-bit pattern should be applicable on E-core
        let pat256 = Avx10IselPattern {
            ir_opcode: Opcode::FAdd,
            description: "test",
            result_opcode: Avx10IselOpcode::VAddPS256,
            priority: 50,
            num_src_operands: 2,
            is_512bit: false,
            is_masked: false,
            required_feature: Some("avx10"),
            min_avx10_version: Avx10Version::V1,
            rounding_mode: None,
        };
        assert!(engine.is_pattern_applicable(&pat256));
    }

    #[test]
    fn test_apx_isel_pattern_applicability() {
        let engine = ApxIselEngine::new(ApxFeatures::default());
        let ndd_pat = ApxIselPattern {
            ir_opcode: Opcode::Add,
            description: "test",
            result_opcode: ApxIselOpcode::AddNDD,
            priority: 100,
            num_src_operands: 3,
            required_feature: Some("apx_ndd"),
            prefer_egpr: false,
        };
        assert!(!engine.is_pattern_applicable(&ndd_pat));

        let engine_full = ApxIselEngine::new(ApxFeatures::apx_full());
        assert!(engine_full.is_pattern_applicable(&ndd_pat));
    }
}