OpenBLAS/kernel/x86/lsame.S

/*********************************************************************/
/* Copyright 2009, 2010 The University of Texas at Austin.           */
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/* Redistribution and use in source and binary forms, with or        */
/* without modification, are permitted provided that the following   */
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/*      copyright notice, this list of conditions and the following  */
/*      disclaimer.                                                  */
/*                                                                   */
/*   2. Redistributions in binary form must reproduce the above      */
/*      copyright notice, this list of conditions and the following  */
/*      disclaimer in the documentation and/or other materials       */
/*      provided with the distribution.                              */
/*                                                                   */
/*    THIS  SOFTWARE IS PROVIDED  BY THE  UNIVERSITY OF  TEXAS AT    */
/*    AUSTIN  ``AS IS''  AND ANY  EXPRESS OR  IMPLIED WARRANTIES,    */
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/*********************************************************************/

#define ASSEMBLER
#include "common.h"

	PROLOGUE
	PROFCODE

	movl	 4(%esp), %eax
	movl	 8(%esp), %edx
	movb	  (%eax), %al		# a = *A
	movb	  (%edx), %dl		# b = *B

	andl	$255, %eax
	andl	$255, %edx

	subl	$65,  %eax
	subl	$65,  %edx

#ifndef HAVE_CMOV
	movl	%eax, %ecx
	subl	$32,  %ecx
	jle	.L1
	movl	%ecx, %eax
.L1:

	movl	%edx, %ecx
	subl	$32,  %ecx
	jle	.L2
	movl	%ecx, %edx
.L2:
	subl	%eax, %edx
	movl	$0,   %eax
	movl	$1,   %edx
	jne	.L3
	movl	%edx, %eax
.L3:
#else
	movl	%eax, %ecx
	subl	$32,  %ecx
	cmovg	%ecx, %eax

	movl	%edx, %ecx
	subl	$32,  %ecx
	cmovg	%ecx, %edx

	subl	%eax, %edx
	movl	$0,   %eax
	movl	$1,   %edx
	cmove	%edx, %eax
#endif
	ret

	EPILOGUE