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Simplify pmovmskb

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This commit is contained in:
Fabian 2020-12-31 19:14:31 -06:00
parent 143f74fd9f
commit 1ff541997d
1 changed files with 8 additions and 24 deletions
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32
src/rust/cpu2/instructions_0f.rs
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@ -3515,14 +3515,10 @@ pub unsafe fn instr_0FD7_mem(addr: i32, r: i32) { trigger_ud(); }
pub unsafe fn instr_0FD7_reg(r1: i32, r2: i32) {
// pmovmskb r, mm
let x: [u8; 8] = std::mem::transmute(read_mmx64s(r1));
let result = x[0] as i32 >> 7 << 0
| x[1] as i32 >> 7 << 1
| x[2] as i32 >> 7 << 2
| x[3] as i32 >> 7 << 3
| x[4] as i32 >> 7 << 4
| x[5] as i32 >> 7 << 5
| x[6] as i32 >> 7 << 6
| x[7] as i32 >> 7 << 7;
let mut result = 0;
for i in 0..8 {
result |= x[i] as i32 >> 7 << i
}
write_reg32(r2, result);
transition_fpu_to_mmx();
}
@ -3532,22 +3528,10 @@ pub unsafe fn instr_660FD7_mem(addr: i32, r: i32) { trigger_ud(); }
pub unsafe fn instr_660FD7_reg(r1: i32, r2: i32) {
// pmovmskb reg, xmm
let x = read_xmm128s(r1);
let result = x.u8_0[0] as i32 >> 7 << 0
| x.u8_0[1] as i32 >> 7 << 1
| x.u8_0[2] as i32 >> 7 << 2
| x.u8_0[3] as i32 >> 7 << 3
| x.u8_0[4] as i32 >> 7 << 4
| x.u8_0[5] as i32 >> 7 << 5
| x.u8_0[6] as i32 >> 7 << 6
| x.u8_0[7] as i32 >> 7 << 7
| x.u8_0[8] as i32 >> 7 << 8
| x.u8_0[9] as i32 >> 7 << 9
| x.u8_0[10] as i32 >> 7 << 10
| x.u8_0[11] as i32 >> 7 << 11
| x.u8_0[12] as i32 >> 7 << 12
| x.u8_0[13] as i32 >> 7 << 13
| x.u8_0[14] as i32 >> 7 << 14
| x.u8_0[15] as i32 >> 7 << 15;
let mut result = 0;
for i in 0..16 {
result |= x.u8_0[i] as i32 >> 7 << i
}
write_reg32(r2, result);
}
#[no_mangle]