minix/lib/libc/arch/i386/int64/cmp64.S

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/* cmp64*() - 64 bit compare Author: Kees J. Bot */
/* 7 Dec 1995 */
#include <machine/asm.h>
ENTRY(cmp64)
/* int cmp64(u64_t i, u64_t j); */
movl %esp, %ecx
0:
xorl %eax, %eax
movl 4(%ecx), %edx
subl 12(%ecx), %edx
movl 8(%ecx), %edx
sbbl 16(%ecx), %edx
sbbl %eax, %eax /* eax = - (i < j) */
movl 12(%ecx), %edx
subl 4(%ecx), %edx
movl 16(%ecx), %edx
sbbl 8(%ecx), %edx
adcl $0, %eax /* eax = (i > j) - (i < j) */
ret
ENTRY(cmp64u)
/* int cmp64u(u64_t i, unsigned j); */
ENTRY(cmp64ul)
/* int cmp64ul(u64_t i, unsigned long j); */
movl %esp, %ecx
push 16(%ecx)
movl $0, 16(%ecx)
call 0b
pop 16(%ecx)
ret
/* */
/* $PchId: cmp64.ack.s,v 1.2 1996/04/11 18:59:57 philip Exp $ */