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MASM code for x64

pull/2/head
weidai 2007-04-16 00:45:21 +00:00
parent 517d6a55ca
commit 6f80838723
1 changed files with 83 additions and 0 deletions
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x64masm.asm Executable file
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PUBLIC Baseline_Add
PUBLIC Baseline_Sub
.CODE
ALIGN 8
Baseline_Add PROC
lea rdx, [rdx+8*rcx]
lea r8, [r8+8*rcx]
lea r9, [r9+8*rcx]
neg rcx ; rcx is negative index
test rcx, 2 ; this clears carry flag
jz $0@Baseline_Add
sub rcx, 2
jmp $1@Baseline_Add
$0@Baseline_Add:
jrcxz $2@Baseline_Add ; loop until rcx overflows and becomes zero
mov rax,[r8+8*rcx]
adc rax,[r9+8*rcx]
mov [rdx+8*rcx],rax
mov rax,[r8+8*rcx+8]
adc rax,[r9+8*rcx+8]
mov [rdx+8*rcx+8],rax
$1@Baseline_Add:
mov rax,[r8+8*rcx+16]
adc rax,[r9+8*rcx+16]
mov [rdx+8*rcx+16],rax
mov rax,[r8+8*rcx+24]
adc rax,[r9+8*rcx+24]
mov [rdx+8*rcx+24],rax
lea rcx,[rcx+4] ; advance index, avoid inc which causes slowdown on Intel Core 2
jmp $0@Baseline_Add
$2@Baseline_Add:
mov rax, 0
setc al ; store carry into rax (return result register)
ret
Baseline_Add ENDP
ALIGN 8
Baseline_Sub PROC
lea rdx, [rdx+8*rcx]
lea r8, [r8+8*rcx]
lea r9, [r9+8*rcx]
neg rcx ; rcx is negative index
test rcx, 2 ; this clears carry flag
jz $0@Baseline_Sub
sub rcx, 2
jmp $1@Baseline_Sub
$0@Baseline_Sub:
jrcxz $2@Baseline_Sub ; loop until rcx overflows and becomes zero
mov rax,[r8+8*rcx]
sbb rax,[r9+8*rcx]
mov [rdx+8*rcx],rax
mov rax,[r8+8*rcx+8]
sbb rax,[r9+8*rcx+8]
mov [rdx+8*rcx+8],rax
$1@Baseline_Sub:
mov rax,[r8+8*rcx+16]
sbb rax,[r9+8*rcx+16]
mov [rdx+8*rcx+16],rax
mov rax,[r8+8*rcx+24]
sbb rax,[r9+8*rcx+24]
mov [rdx+8*rcx+24],rax
lea rcx,[rcx+4] ; advance index, avoid inc which causes slowdown on Intel Core 2
jmp $0@Baseline_Sub
$2@Baseline_Sub:
mov rax, 0
setc al ; store carry into rax (return result register)
ret
Baseline_Sub ENDP
_TEXT ENDS
END