30 lines
522 B
ArmAsm
30 lines
522 B
ArmAsm
! sub64u() - unsigned from 64 bit subtraction Author: Kees J. Bot
|
|
! 24 Dec 1995
|
|
.sect .text
|
|
.define _sub64u, _sub64ul
|
|
|
|
_sub64u: ! u64_t sub64u(u64_t i, unsigned j);
|
|
push bp
|
|
mov bp, sp
|
|
xor cx, cx
|
|
jmp 0f
|
|
_sub64ul: ! u64_t sub64ul(u64_t i, unsigned long j);
|
|
push bp
|
|
mov bp, sp
|
|
mov cx, 16(bp)
|
|
0: mov bx, 4(bp)
|
|
mov ax, 6(bp)
|
|
sub ax, 14(bp)
|
|
mov (bx), ax
|
|
mov ax, 8(bp)
|
|
sbb ax, cx
|
|
mov 2(bx), ax
|
|
mov ax, 10(bp)
|
|
sbb ax, #0
|
|
mov 4(bx), ax
|
|
mov ax, 12(bp)
|
|
sbb ax, #0
|
|
mov 6(bx), ax
|
|
mov ax, bx
|
|
pop bp
|
|
ret
|