llama-cpp-sys-4 0.2.51

Low Level Bindings to llama.cpp
Documentation 
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#pragma OPENCL EXTENSION cl_khr_fp16 : enable
#pragma OPENCL EXTENSION cl_khr_subgroups : enable

#ifdef cl_qcom_reqd_sub_group_size
#pragma OPENCL EXTENSION cl_qcom_reqd_sub_group_size : enable
#define ADRENO_GPU 1
#define REQD_SUBGROUP_SIZE_64 __attribute__((qcom_reqd_sub_group_size("half")))
#endif

#define QK4_NL 32
#define NSUBGROUPS 4
#define SUBGROUP_SIZE 64

constant half kvalues_iq4nl[16] = {
    (half)-127.f, (half)-104.f, (half)-83.f, (half)-65.f,
    (half) -49.f, (half) -35.f, (half)-22.f, (half)-10.f,
    (half)   1.f, (half)  13.f, (half) 25.f, (half) 38.f,
    (half)  53.f, (half)  69.f, (half) 89.f, (half)113.f
};

// Packed LUT: 2 FP16 values per uint, 8 unique constant loads instead of 16
constant uint iq4nl_packed[8] = {
    0xD680D7F0u,  // idx 0,1: -127, -104
    0xD410D530u,  // idx 2,3: -83, -65
    0xD060D220u,  // idx 4,5: -49, -35
    0xC900CD80u,  // idx 6,7: -22, -10
    0x4A803C00u,  // idx 8,9: 1, 13
    0x50C04E40u,  // idx 10,11: 25, 38
    0x545052A0u,  // idx 12,13: 53, 69
    0x57105590u   // idx 14,15: 89, 113
};

// Packed dequant: 1 uint constant load (8-way divergence) + shift + as_half
#define IQ4_NL_DEQUANT(nibble) as_half((ushort)(iq4nl_packed[(nibble) >> 1] >> (((nibble) & 1u) << 4)))

#define dequantizeBlockAccum_ns_sgbroadcast_1_hi(total_sums, bits4, scale, y) \
    float shared_y; \
    shared_y = sub_group_broadcast(y.s0, 0); \
    total_sums.s0 += IQ4_NL_DEQUANT((bits4.s0 & 0x000F)) * scale.s0 * shared_y; \
    total_sums.s1 += IQ4_NL_DEQUANT((bits4.s1 & 0x000F)) * scale.s1 * shared_y; \
    shared_y = sub_group_broadcast(y.s1, 0); \
    total_sums.s0 += IQ4_NL_DEQUANT(((bits4.s0 & 0x00F0) >> 4)) * scale.s0 * shared_y; \
    total_sums.s1 += IQ4_NL_DEQUANT(((bits4.s1 & 0x00F0) >> 4)) * scale.s1 * shared_y; \
    shared_y = sub_group_broadcast(y.s2, 0); \
    total_sums.s0 += IQ4_NL_DEQUANT(((bits4.s0 & 0x0F00) >> 8)) * scale.s0 * shared_y; \
    total_sums.s1 += IQ4_NL_DEQUANT(((bits4.s1 & 0x0F00) >> 8)) * scale.s1 * shared_y; \
    shared_y = sub_group_broadcast(y.s3, 0); \
    total_sums.s0 += IQ4_NL_DEQUANT(((bits4.s0 & 0xF000) >> 12)) * scale.s0 * shared_y; \
    total_sums.s1 += IQ4_NL_DEQUANT(((bits4.s1 & 0xF000) >> 12)) * scale.s1 * shared_y; \
    shared_y = sub_group_broadcast(y.s4, 0); \
    total_sums.s0 += IQ4_NL_DEQUANT((bits4.s2 & 0x000F)) * scale.s0 * shared_y; \
    total_sums.s1 += IQ4_NL_DEQUANT((bits4.s3 & 0x000F)) * scale.s1 * shared_y; \
    shared_y = sub_group_broadcast(y.s5, 0); \
    total_sums.s0 += IQ4_NL_DEQUANT(((bits4.s2 & 0x00F0) >> 4)) * scale.s0 * shared_y; \
    total_sums.s1 += IQ4_NL_DEQUANT(((bits4.s3 & 0x00F0) >> 4)) * scale.s1 * shared_y; \
    shared_y = sub_group_broadcast(y.s6, 0); \
    total_sums.s0 += IQ4_NL_DEQUANT(((bits4.s2 & 0x0F00) >> 8)) * scale.s0 * shared_y; \
    total_sums.s1 += IQ4_NL_DEQUANT(((bits4.s3 & 0x0F00) >> 8)) * scale.s1 * shared_y; \
    shared_y = sub_group_broadcast(y.s7, 0); \
    total_sums.s0 += IQ4_NL_DEQUANT(((bits4.s2 & 0xF000) >> 12)) * scale.s0 * shared_y; \
    total_sums.s1 += IQ4_NL_DEQUANT(((bits4.s3 & 0xF000) >> 12)) * scale.s1 * shared_y; \
    shared_y = sub_group_broadcast(y.s0, 1); \
    total_sums.s0 += IQ4_NL_DEQUANT((bits4.s4 & 0x000F)) * scale.s0 * shared_y; \
    total_sums.s1 += IQ4_NL_DEQUANT((bits4.s5 & 0x000F)) * scale.s1 * shared_y; \
    shared_y = sub_group_broadcast(y.s1, 1); \
    total_sums.s0 += IQ4_NL_DEQUANT(((bits4.s4 & 0x00F0) >> 4)) * scale.s0 * shared_y; \
    total_sums.s1 += IQ4_NL_DEQUANT(((bits4.s5 & 0x00F0) >> 4)) * scale.s1 * shared_y; \
    shared_y = sub_group_broadcast(y.s2, 1); \
    total_sums.s0 += IQ4_NL_DEQUANT(((bits4.s4 & 0x0F00) >> 8)) * scale.s0 * shared_y; \
    total_sums.s1 += IQ4_NL_DEQUANT(((bits4.s5 & 0x0F00) >> 8)) * scale.s1 * shared_y; \
    shared_y = sub_group_broadcast(y.s3, 1); \
    total_sums.s0 += IQ4_NL_DEQUANT(((bits4.s4 & 0xF000) >> 12)) * scale.s0 * shared_y; \
    total_sums.s1 += IQ4_NL_DEQUANT(((bits4.s5 & 0xF000) >> 12)) * scale.s1 * shared_y; \
    shared_y = sub_group_broadcast(y.s4, 1); \
    total_sums.s0 += IQ4_NL_DEQUANT((bits4.s6 & 0x000F)) * scale.s0 * shared_y; \
    total_sums.s1 += IQ4_NL_DEQUANT((bits4.s7 & 0x000F)) * scale.s1 * shared_y; \
    shared_y = sub_group_broadcast(y.s5, 1); \
    total_sums.s0 += IQ4_NL_DEQUANT(((bits4.s6 & 0x00F0) >> 4)) * scale.s0 * shared_y; \
    total_sums.s1 += IQ4_NL_DEQUANT(((bits4.s7 & 0x00F0) >> 4)) * scale.s1 * shared_y; \
    shared_y = sub_group_broadcast(y.s6, 1); \
    total_sums.s0 += IQ4_NL_DEQUANT(((bits4.s6 & 0x0F00) >> 8)) * scale.s0 * shared_y; \
    total_sums.s1 += IQ4_NL_DEQUANT(((bits4.s7 & 0x0F00) >> 8)) * scale.s1 * shared_y; \
    shared_y = sub_group_broadcast(y.s7, 1); \
    total_sums.s0 += IQ4_NL_DEQUANT(((bits4.s6 & 0xF000) >> 12)) * scale.s0 * shared_y; \
    total_sums.s1 += IQ4_NL_DEQUANT(((bits4.s7 & 0xF000) >> 12)) * scale.s1 * shared_y; \


#define dequantizeBlockAccum_ns_sgbroadcast_1_lo(total_sums, bits4, scale, y) \
    shared_y = sub_group_broadcast(y.s0, 2); \
    total_sums.s0 += IQ4_NL_DEQUANT((bits4.s0 & 0x000F)) * scale.s0 * shared_y; \
    total_sums.s1 += IQ4_NL_DEQUANT((bits4.s1 & 0x000F)) * scale.s1 * shared_y; \
    shared_y = sub_group_broadcast(y.s1, 2); \
    total_sums.s0 += IQ4_NL_DEQUANT(((bits4.s0 & 0x00F0) >> 4)) * scale.s0 * shared_y; \
    total_sums.s1 += IQ4_NL_DEQUANT(((bits4.s1 & 0x00F0) >> 4)) * scale.s1 * shared_y; \
    shared_y = sub_group_broadcast(y.s2, 2); \
    total_sums.s0 += IQ4_NL_DEQUANT(((bits4.s0 & 0x0F00) >> 8)) * scale.s0 * shared_y; \
    total_sums.s1 += IQ4_NL_DEQUANT(((bits4.s1 & 0x0F00) >> 8)) * scale.s1 * shared_y; \
    shared_y = sub_group_broadcast(y.s3, 2); \
    total_sums.s0 += IQ4_NL_DEQUANT(((bits4.s0 & 0xF000) >> 12)) * scale.s0 * shared_y; \
    total_sums.s1 += IQ4_NL_DEQUANT(((bits4.s1 & 0xF000) >> 12)) * scale.s1 * shared_y; \
    shared_y = sub_group_broadcast(y.s4, 2); \
    total_sums.s0 += IQ4_NL_DEQUANT((bits4.s2 & 0x000F)) * scale.s0 * shared_y; \
    total_sums.s1 += IQ4_NL_DEQUANT((bits4.s3 & 0x000F)) * scale.s1 * shared_y; \
    shared_y = sub_group_broadcast(y.s5, 2); \
    total_sums.s0 += IQ4_NL_DEQUANT(((bits4.s2 & 0x00F0) >> 4)) * scale.s0 * shared_y; \
    total_sums.s1 += IQ4_NL_DEQUANT(((bits4.s3 & 0x00F0) >> 4)) * scale.s1 * shared_y; \
    shared_y = sub_group_broadcast(y.s6, 2); \
    total_sums.s0 += IQ4_NL_DEQUANT(((bits4.s2 & 0x0F00) >> 8)) * scale.s0 * shared_y; \
    total_sums.s1 += IQ4_NL_DEQUANT(((bits4.s3 & 0x0F00) >> 8)) * scale.s1 * shared_y; \
    shared_y = sub_group_broadcast(y.s7, 2); \
    total_sums.s0 += IQ4_NL_DEQUANT(((bits4.s2 & 0xF000) >> 12)) * scale.s0 * shared_y; \
    total_sums.s1 += IQ4_NL_DEQUANT(((bits4.s3 & 0xF000) >> 12)) * scale.s1 * shared_y; \
    shared_y = sub_group_broadcast(y.s0, 3); \
    total_sums.s0 += IQ4_NL_DEQUANT((bits4.s4 & 0x000F)) * scale.s0 * shared_y; \
    total_sums.s1 += IQ4_NL_DEQUANT((bits4.s5 & 0x000F)) * scale.s1 * shared_y; \
    shared_y = sub_group_broadcast(y.s1, 3); \
    total_sums.s0 += IQ4_NL_DEQUANT(((bits4.s4 & 0x00F0) >> 4)) * scale.s0 * shared_y; \
    total_sums.s1 += IQ4_NL_DEQUANT(((bits4.s5 & 0x00F0) >> 4)) * scale.s1 * shared_y; \
    shared_y = sub_group_broadcast(y.s2, 3); \
    total_sums.s0 += IQ4_NL_DEQUANT(((bits4.s4 & 0x0F00) >> 8)) * scale.s0 * shared_y; \
    total_sums.s1 += IQ4_NL_DEQUANT(((bits4.s5 & 0x0F00) >> 8)) * scale.s1 * shared_y; \
    shared_y = sub_group_broadcast(y.s3, 3); \
    total_sums.s0 += IQ4_NL_DEQUANT(((bits4.s4 & 0xF000) >> 12)) * scale.s0 * shared_y; \
    total_sums.s1 += IQ4_NL_DEQUANT(((bits4.s5 & 0xF000) >> 12)) * scale.s1 * shared_y; \
    shared_y = sub_group_broadcast(y.s4, 3); \
    total_sums.s0 += IQ4_NL_DEQUANT((bits4.s6 & 0x000F)) * scale.s0 * shared_y; \
    total_sums.s1 += IQ4_NL_DEQUANT((bits4.s7 & 0x000F)) * scale.s1 * shared_y; \
    shared_y = sub_group_broadcast(y.s5, 3); \
    total_sums.s0 += IQ4_NL_DEQUANT(((bits4.s6 & 0x00F0) >> 4)) * scale.s0 * shared_y; \
    total_sums.s1 += IQ4_NL_DEQUANT(((bits4.s7 & 0x00F0) >> 4)) * scale.s1 * shared_y; \
    shared_y = sub_group_broadcast(y.s6, 3); \
    total_sums.s0 += IQ4_NL_DEQUANT(((bits4.s6 & 0x0F00) >> 8)) * scale.s0 * shared_y; \
    total_sums.s1 += IQ4_NL_DEQUANT(((bits4.s7 & 0x0F00) >> 8)) * scale.s1 * shared_y; \
    shared_y = sub_group_broadcast(y.s7, 3); \
    total_sums.s0 += IQ4_NL_DEQUANT(((bits4.s6 & 0xF000) >> 12)) * scale.s0 * shared_y; \
    total_sums.s1 += IQ4_NL_DEQUANT(((bits4.s7 & 0xF000) >> 12)) * scale.s1 * shared_y; \


#define dequantizeBlockAccum_ns_sgbroadcast_8_hi(total_sums, bits4, scale, y) \
    float8 shared_y; \
    shared_y = sub_group_broadcast(y, 0); \
    total_sums.s0 += IQ4_NL_DEQUANT((bits4.s0 & 0x000F))         * scale.s0 * shared_y.s0; \
    total_sums.s0 += IQ4_NL_DEQUANT(((bits4.s0 & 0x00F0) >> 4))  * scale.s0 * shared_y.s1; \
    total_sums.s0 += IQ4_NL_DEQUANT(((bits4.s0 & 0x0F00) >> 8))  * scale.s0 * shared_y.s2; \
    total_sums.s0 += IQ4_NL_DEQUANT(((bits4.s0 & 0xF000) >> 12)) * scale.s0 * shared_y.s3; \
    total_sums.s0 += IQ4_NL_DEQUANT((bits4.s2 & 0x000F))         * scale.s0 * shared_y.s4; \
    total_sums.s0 += IQ4_NL_DEQUANT(((bits4.s2 & 0x00F0) >> 4))  * scale.s0 * shared_y.s5; \
    total_sums.s0 += IQ4_NL_DEQUANT(((bits4.s2 & 0x0F00) >> 8))  * scale.s0 * shared_y.s6; \
    total_sums.s0 += IQ4_NL_DEQUANT(((bits4.s2 & 0xF000) >> 12)) * scale.s0 * shared_y.s7; \
    total_sums.s1 += IQ4_NL_DEQUANT((bits4.s1 & 0x000F))         * scale.s1 * shared_y.s0; \
    total_sums.s1 += IQ4_NL_DEQUANT(((bits4.s1 & 0x00F0) >> 4))  * scale.s1 * shared_y.s1; \
    total_sums.s1 += IQ4_NL_DEQUANT(((bits4.s1 & 0x0F00) >> 8))  * scale.s1 * shared_y.s2; \
    total_sums.s1 += IQ4_NL_DEQUANT(((bits4.s1 & 0xF000) >> 12)) * scale.s1 * shared_y.s3; \
    total_sums.s1 += IQ4_NL_DEQUANT((bits4.s3 & 0x000F))         * scale.s1 * shared_y.s4; \
    total_sums.s1 += IQ4_NL_DEQUANT(((bits4.s3 & 0x00F0) >> 4))  * scale.s1 * shared_y.s5; \
    total_sums.s1 += IQ4_NL_DEQUANT(((bits4.s3 & 0x0F00) >> 8))  * scale.s1 * shared_y.s6; \
    total_sums.s1 += IQ4_NL_DEQUANT(((bits4.s3 & 0xF000) >> 12)) * scale.s1 * shared_y.s7; \
    shared_y = sub_group_broadcast(y, 1); \
    total_sums.s0 += IQ4_NL_DEQUANT((bits4.s4 & 0x000F))         * scale.s0 * shared_y.s0; \
    total_sums.s0 += IQ4_NL_DEQUANT(((bits4.s4 & 0x00F0) >> 4))  * scale.s0 * shared_y.s1; \
    total_sums.s0 += IQ4_NL_DEQUANT(((bits4.s4 & 0x0F00) >> 8))  * scale.s0 * shared_y.s2; \
    total_sums.s0 += IQ4_NL_DEQUANT(((bits4.s4 & 0xF000) >> 12)) * scale.s0 * shared_y.s3; \
    total_sums.s0 += IQ4_NL_DEQUANT((bits4.s6 & 0x000F))         * scale.s0 * shared_y.s4; \
    total_sums.s0 += IQ4_NL_DEQUANT(((bits4.s6 & 0x00F0) >> 4))  * scale.s0 * shared_y.s5; \
    total_sums.s0 += IQ4_NL_DEQUANT(((bits4.s6 & 0x0F00) >> 8))  * scale.s0 * shared_y.s6; \
    total_sums.s0 += IQ4_NL_DEQUANT(((bits4.s6 & 0xF000) >> 12)) * scale.s0 * shared_y.s7; \
    total_sums.s1 += IQ4_NL_DEQUANT((bits4.s5 & 0x000F))         * scale.s1 * shared_y.s0; \
    total_sums.s1 += IQ4_NL_DEQUANT(((bits4.s5 & 0x00F0) >> 4))  * scale.s1 * shared_y.s1; \
    total_sums.s1 += IQ4_NL_DEQUANT(((bits4.s5 & 0x0F00) >> 8))  * scale.s1 * shared_y.s2; \
    total_sums.s1 += IQ4_NL_DEQUANT(((bits4.s5 & 0xF000) >> 12)) * scale.s1 * shared_y.s3; \
    total_sums.s1 += IQ4_NL_DEQUANT((bits4.s7 & 0x000F))         * scale.s1 * shared_y.s4; \
    total_sums.s1 += IQ4_NL_DEQUANT(((bits4.s7 & 0x00F0) >> 4))  * scale.s1 * shared_y.s5; \
    total_sums.s1 += IQ4_NL_DEQUANT(((bits4.s7 & 0x0F00) >> 8))  * scale.s1 * shared_y.s6; \
    total_sums.s1 += IQ4_NL_DEQUANT(((bits4.s7 & 0xF000) >> 12)) * scale.s1 * shared_y.s7; \


#define dequantizeBlockAccum_ns_sgbroadcast_8_lo(total_sums, bits4, scale, y) \
    shared_y = sub_group_broadcast(y, 2); \
    total_sums.s0 += IQ4_NL_DEQUANT((bits4.s0 & 0x000F))         * scale.s0 * shared_y.s0; \
    total_sums.s0 += IQ4_NL_DEQUANT(((bits4.s0 & 0x00F0) >> 4))  * scale.s0 * shared_y.s1; \
    total_sums.s0 += IQ4_NL_DEQUANT(((bits4.s0 & 0x0F00) >> 8))  * scale.s0 * shared_y.s2; \
    total_sums.s0 += IQ4_NL_DEQUANT(((bits4.s0 & 0xF000) >> 12)) * scale.s0 * shared_y.s3; \
    total_sums.s0 += IQ4_NL_DEQUANT((bits4.s2 & 0x000F))         * scale.s0 * shared_y.s4; \
    total_sums.s0 += IQ4_NL_DEQUANT(((bits4.s2 & 0x00F0) >> 4))  * scale.s0 * shared_y.s5; \
    total_sums.s0 += IQ4_NL_DEQUANT(((bits4.s2 & 0x0F00) >> 8))  * scale.s0 * shared_y.s6; \
    total_sums.s0 += IQ4_NL_DEQUANT(((bits4.s2 & 0xF000) >> 12)) * scale.s0 * shared_y.s7; \
    total_sums.s1 += IQ4_NL_DEQUANT((bits4.s1 & 0x000F))         * scale.s1 * shared_y.s0; \
    total_sums.s1 += IQ4_NL_DEQUANT(((bits4.s1 & 0x00F0) >> 4))  * scale.s1 * shared_y.s1; \
    total_sums.s1 += IQ4_NL_DEQUANT(((bits4.s1 & 0x0F00) >> 8))  * scale.s1 * shared_y.s2; \
    total_sums.s1 += IQ4_NL_DEQUANT(((bits4.s1 & 0xF000) >> 12)) * scale.s1 * shared_y.s3; \
    total_sums.s1 += IQ4_NL_DEQUANT((bits4.s3 & 0x000F))         * scale.s1 * shared_y.s4; \
    total_sums.s1 += IQ4_NL_DEQUANT(((bits4.s3 & 0x00F0) >> 4))  * scale.s1 * shared_y.s5; \
    total_sums.s1 += IQ4_NL_DEQUANT(((bits4.s3 & 0x0F00) >> 8))  * scale.s1 * shared_y.s6; \
    total_sums.s1 += IQ4_NL_DEQUANT(((bits4.s3 & 0xF000) >> 12)) * scale.s1 * shared_y.s7; \
    shared_y = sub_group_broadcast(y, 3); \
    total_sums.s0 += IQ4_NL_DEQUANT((bits4.s4 & 0x000F))         * scale.s0 * shared_y.s0; \
    total_sums.s0 += IQ4_NL_DEQUANT(((bits4.s4 & 0x00F0) >> 4))  * scale.s0 * shared_y.s1; \
    total_sums.s0 += IQ4_NL_DEQUANT(((bits4.s4 & 0x0F00) >> 8))  * scale.s0 * shared_y.s2; \
    total_sums.s0 += IQ4_NL_DEQUANT(((bits4.s4 & 0xF000) >> 12)) * scale.s0 * shared_y.s3; \
    total_sums.s0 += IQ4_NL_DEQUANT((bits4.s6 & 0x000F))         * scale.s0 * shared_y.s4; \
    total_sums.s0 += IQ4_NL_DEQUANT(((bits4.s6 & 0x00F0) >> 4))  * scale.s0 * shared_y.s5; \
    total_sums.s0 += IQ4_NL_DEQUANT(((bits4.s6 & 0x0F00) >> 8))  * scale.s0 * shared_y.s6; \
    total_sums.s0 += IQ4_NL_DEQUANT(((bits4.s6 & 0xF000) >> 12)) * scale.s0 * shared_y.s7; \
    total_sums.s1 += IQ4_NL_DEQUANT((bits4.s5 & 0x000F))         * scale.s1 * shared_y.s0; \
    total_sums.s1 += IQ4_NL_DEQUANT(((bits4.s5 & 0x00F0) >> 4))  * scale.s1 * shared_y.s1; \
    total_sums.s1 += IQ4_NL_DEQUANT(((bits4.s5 & 0x0F00) >> 8))  * scale.s1 * shared_y.s2; \
    total_sums.s1 += IQ4_NL_DEQUANT(((bits4.s5 & 0xF000) >> 12)) * scale.s1 * shared_y.s3; \
    total_sums.s1 += IQ4_NL_DEQUANT((bits4.s7 & 0x000F))         * scale.s1 * shared_y.s4; \
    total_sums.s1 += IQ4_NL_DEQUANT(((bits4.s7 & 0x00F0) >> 4))  * scale.s1 * shared_y.s5; \
    total_sums.s1 += IQ4_NL_DEQUANT(((bits4.s7 & 0x0F00) >> 8))  * scale.s1 * shared_y.s6; \
    total_sums.s1 += IQ4_NL_DEQUANT(((bits4.s7 & 0xF000) >> 12)) * scale.s1 * shared_y.s7; \

#ifdef ADRENO_GPU
REQD_SUBGROUP_SIZE_64
#endif
kernel void kernel_gemv_noshuffle_iq4_nl_f32(
        read_only  image1d_buffer_t src0_q,
        global half2  * src0_d,
        read_only  image1d_buffer_t src1,
        global float * dst,
        ulong offsetd,
        int ne00,
        int ne01)
{
    uint groupId = get_local_id(1);
    uint gid     = get_global_id(0);
    ushort slid    = get_sub_group_local_id();

    uint K = ne00;
    uint M = ne01;

    uint LINE_STRIDE_A = M / 2;
    uint BLOCK_STRIDE_A = NSUBGROUPS * M;

    private uint4     regA;
    private half2     regS;
    private float8    regB;

    private float2 totalSum = (float2)(0.0f);

    // loop along K in block granularity, skip 4 blocks every iter
    for (uint k = groupId; k < (K / QK4_NL); k += NSUBGROUPS) {
        regS = src0_d[gid + k * LINE_STRIDE_A]; // each fiber loads scale of two rows
        // first 4 fibers in each wave load 8 B values to its private scope
        if (slid < 4) {
            regB.s0123 = read_imagef(src1, (slid * 2 + k * 8));
            regB.s4567 = read_imagef(src1, (1 + slid * 2 + k * 8));
        }

        // load half weights for two blocks in consecutive rows
        regA.s0 = read_imageui(src0_q, (gid + k * BLOCK_STRIDE_A + LINE_STRIDE_A * 0)).x;
        regA.s1 = read_imageui(src0_q, (gid + k * BLOCK_STRIDE_A + LINE_STRIDE_A * 1)).x;
        regA.s2 = read_imageui(src0_q, (gid + k * BLOCK_STRIDE_A + LINE_STRIDE_A * 2)).x;
        regA.s3 = read_imageui(src0_q, (gid + k * BLOCK_STRIDE_A + LINE_STRIDE_A * 3)).x;
#ifdef VECTOR_SUB_GROUP_BROADCAST
        dequantizeBlockAccum_ns_sgbroadcast_8_hi(totalSum, as_ushort8(regA), regS, regB);
#else
        dequantizeBlockAccum_ns_sgbroadcast_1_hi(totalSum, as_ushort8(regA), regS, regB);
#endif // VECTOR_SUB_GROUP_BROADCAST

        regA.s0 = read_imageui(src0_q, (gid + k * BLOCK_STRIDE_A + LINE_STRIDE_A * 4)).x;
        regA.s1 = read_imageui(src0_q, (gid + k * BLOCK_STRIDE_A + LINE_STRIDE_A * 5)).x;
        regA.s2 = read_imageui(src0_q, (gid + k * BLOCK_STRIDE_A + LINE_STRIDE_A * 6)).x;
        regA.s3 = read_imageui(src0_q, (gid + k * BLOCK_STRIDE_A + LINE_STRIDE_A * 7)).x;
#ifdef VECTOR_SUB_GROUP_BROADCAST
        dequantizeBlockAccum_ns_sgbroadcast_8_lo(totalSum, as_ushort8(regA), regS, regB);
#else
        dequantizeBlockAccum_ns_sgbroadcast_1_lo(totalSum, as_ushort8(regA), regS, regB);
#endif // VECTOR_SUB_GROUP_BROADCAST
    }

    // reduction in local memory, assumes #wave=4
    local float2 reduceLM[SUBGROUP_SIZE * 3];
    if (groupId == 1) {
        reduceLM[SUBGROUP_SIZE * 0 + slid] = totalSum;
    }
    if (groupId == 2) {
        reduceLM[SUBGROUP_SIZE * 1 + slid] = totalSum;
    }
    if (groupId == 3) {
        reduceLM[SUBGROUP_SIZE * 2 + slid] = totalSum;
    }

    barrier(CLK_LOCAL_MEM_FENCE);

    if (groupId == 0) {
        totalSum += reduceLM[SUBGROUP_SIZE * 0 + slid];
    }
    if (groupId == 0) {
        totalSum += reduceLM[SUBGROUP_SIZE * 1 + slid];
    }
    if (groupId == 0) {
        totalSum += reduceLM[SUBGROUP_SIZE * 2 + slid];
    }

    // 2 outputs per fiber in wave 0
    if (groupId == 0) {
        dst = (global float*)((global char*)dst + offsetd);
        vstore2(totalSum, 0, &(dst[gid * 2]));
    }

}