dawids/lang-bootstrap
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return, integer literals

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pommicket 2022-02-10 18:09:32 -05:00
parent d8bb5b8957
commit bba56d2b51
4 changed files with 125 additions and 7 deletions
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@ -127,7 +127,7 @@ ax bx cx dx sp bp si di
│ mov [rbx], ax │ 66 89 03 │ store ax as 2 bytes at address rbx │
│ mov ax, [rbx] │ 66 8b 03 │ load 2 bytes from address rbx into eax │
│ mov [rbx], al │ 88 03 │ store al as 1 byte at address rbx │
│ mov al, [rbx] │ 8a 03 │ load 1 byte from addrress rbx into al │
│ mov al, [rbx] │ 8a 03 │ load 1 byte from address rbx into al │
│ mov rax, [rbp+IMM32] │ 48 8b 85 IMM32 │ load 8 bytes from address rbp+IMM32 │
│ │ │ into rax (note: IMM32 may be negative) │
│ mov rax, [rsp+IMM32] │ 48 8b 84 24 IMM32 │ load 8 bytes from address rsp+IMM32 │
@ -138,6 +138,9 @@ ax bx cx dx sp bp si di
│ mov rbp, [rsp] │ 48 8b 2c 24 │ load 8 bytes from rsp into rbp │
│ lea rax, [rbp+IMM32] │ 48 8d 85 IMM32 │ set rax to rbp+IMM32 │
│ lea rsp, [rbp+IMM32] │ 48 8d a5 IMM32 │ set rsp to rbp+IMM32 │
| movsq | 48 a5 | copy 8 bytes from rsi to rdi |
| rep movsb | f3 a4 | copy rcx bytes from rsi to rdi |
│ push rax │ 50 │ push rax onto the stack │
│ neg rax │ 48 f7 d8 │ set rax to -rax │
│ add rax, rbx │ 48 01 d8 │ add rbx to rax │
│ sub rax, rbx │ 48 29 d8 │ subtract rbx from rax │