gcrecomp_core/runtime/
context.rs

1// CPU context
2#[derive(Debug, Clone)]
3pub struct CpuContext {
4    pub gpr: [u32; 32],        // General Purpose Registers (r0-r31)
5    pub pc: u32,               // Program Counter
6    pub lr: u32,               // Link Register
7    pub ctr: u32,              // Count Register
8    pub cr: u32,               // Condition Register
9    pub xer: u32,              // Fixed-Point Exception Register
10    pub fpscr: u32,            // Floating-Point Status and Control Register
11    pub fpr: [f64; 32],       // Floating-Point Registers
12    pub msr: u32,              // Machine State Register
13}
14
15impl CpuContext {
16    pub fn new() -> Self {
17        Self {
18            gpr: [0; 32],
19            pc: 0,
20            lr: 0,
21            ctr: 0,
22            cr: 0,
23            xer: 0,
24            fpscr: 0,
25            fpr: [0.0; 32],
26            msr: 0,
27        }
28    }
29
30    pub fn get_register(&self, reg: u8) -> u32 {
31        if reg < 32 {
32            self.gpr[reg as usize]
33        } else {
34            0
35        }
36    }
37
38    pub fn set_register(&mut self, reg: u8, value: u32) {
39        if reg < 32 {
40            self.gpr[reg as usize] = value;
41        }
42    }
43
44    pub fn get_cr_field(&self, field: u8) -> u8 {
45        if field < 8 {
46            ((self.cr >> (4 * field)) & 0xF) as u8
47        } else {
48            0
49        }
50    }
51
52    pub fn set_cr_field(&mut self, field: u8, value: u8) {
53        if field < 8 {
54            let mask = !(0xF << (4 * field));
55            self.cr = (self.cr & mask) | ((value as u32 & 0xF) << (4 * field));
56        }
57    }
58
59    pub fn get_fpr(&self, reg: u8) -> f64 {
60        if reg < 32 {
61            self.fpr[reg as usize]
62        } else {
63            0.0
64        }
65    }
66
67    pub fn set_fpr(&mut self, reg: u8, value: f64) {
68        if reg < 32 {
69            self.fpr[reg as usize] = value;
70        }
71    }
72}
73
74impl Default for CpuContext {
75    fn default() -> Self {
76        Self::new()
77    }
78}
79
gcrecomp_core/runtime/context.rs

gcrecomp_core/runtime/
context.rs
