fb41e04787
a return instruction. (The latter is discouraged by the Opteron optimization manual because it disables branch prediction for the return instruction.) Reviewed by: bde
25 lines
373 B
ArmAsm
25 lines
373 B
ArmAsm
#include <machine/asm.h>
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__FBSDID("$FreeBSD$");
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#if 0
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RCSID("$NetBSD: bcmp.S,v 1.1 2001/06/19 00:25:04 fvdl Exp $")
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#endif
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ENTRY(bcmp)
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cld /* set compare direction forward */
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movq %rdx,%rcx /* compare by words */
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shrq $3,%rcx
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repe
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cmpsq
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jne L1
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movq %rdx,%rcx /* compare remainder by bytes */
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andq $7,%rcx
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repe
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cmpsb
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L1:
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setne %al
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movsbl %al,%eax
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ret
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