OpenBLAS/kernel/x86_64/lsame.S

/*********************************************************************/
/* Copyright 2009, 2010 The University of Texas at Austin.           */
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/*********************************************************************/

#define ASSEMBLER
#include "common.h"

#define X	ARG1	/* rdi */
#define Y	ARG2	/* rsi */
#define XX	ARG3
#define YY	ARG4

	PROLOGUE
	PROFCODE

	movzbq	(X), X
	movzbq	(Y), Y

	andq	$255, X
	andq	$255, Y

	leaq	-32(X), XX
	leaq	-32(Y), YY

	cmpq	$97, X
	cmovge	 XX, X

	cmpq	$97,Y
	cmovge	YY, Y

	movq	$0, %rax
	movq	$1, %r8

	cmpq	X, Y
	cmoveq	%r8, %rax
	ret

	EPILOGUE