dawids/lang-bootstrap
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pommicket 2022-02-11 14:34:54 -05:00
parent b13e16b517
commit 81d6850539
3 changed files with 151 additions and 2 deletions
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README.md
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@ -112,6 +112,7 @@ ax bx cx dx sp bp si di
│ Instruction │ Encoding │ Description │
├──────────────────────┼───────────────────┼────────────────────────────────────────┤
│ mov rax, IMM64 │ 48 b8 IMM64 │ set rax to the 64-bit value IMM64 │
│ mov rbx, IMM64 │ 48 bb IMM64 │ set rbx to the 64-bit value IMM64 │
│ xor eax, eax │ 31 c0 │ set rax to 0 (shorter than mov rax, 0) │
│ xor edx, edx │ 31 d2 │ set rdx to 0 │
│ mov RDEST, RSRC │ 48 89 (DEST|SRC<<3|0xc0) │ set register DEST to current │
@ -184,11 +185,14 @@ ax bx cx dx sp bp si di
| movq rax, xmm0 | 66 48 0f 7e c0 | set rax to xmm0 |
| movq xmm0, rax | 66 48 0f 6e c0 | set xmm0 to rax |
| movq xmm1, rax | 66 48 0f 6e c8 | set xmm1 to rax |
| movq xmm1, xmm0 | f3 0f 7e c8 | set xmm1 to xmm0 |
| cvtss2sd xmm0, xmm0 | f3 0f 5a c0 | convert xmm0 from float to double |
| cvtsd2ss xmm0, xmm0 | f2 0f 5a c0 | convert xmm0 from double to float |
| cvttsd2si rax, xmm0 | f2 48 0f 2c c0 | convert double in xmm0 to int in rax |
| cvtsi2sd xmm0, rax | f2 48 0f 2a c0 | convert int in rax to double in xmm0 |
| comisd xmm0, xmm1 | 66 0f 2f c1 | compare xmm0 and xmm1 |
| addsd xmm0, xmm1 | f2 0f 58 c1 | add xmm1 to xmm0 |
| subsd xmm0, xmm1 | f2 0f 5c c1 | subtract xmm1 from xmm0 |
│ call rax │ ff d0 │ call the function at address rax │
│ ret │ c3 │ return from function │
│ syscall │ 0f 05 │ execute a system call │