405b8029a6
Change-Id: I2864dea04b3faf2d919165dcaa600af5b16c41c8 Signed-off-by: Chris Dearman <chris@mips.com> Signed-off-by: Raghu Gandham <raghu@mips.com>
55 lines
1.8 KiB
ArmAsm
55 lines
1.8 KiB
ArmAsm
/*
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* Copyright (C) 2008 The Android Open Source Project
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
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* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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.text
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/*
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* u4 __memcmp16(const u2* s0, const u2* s1, size_t count);
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*/
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.type __memcmp16, @function
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.global __memcmp16
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.align 4
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.ent __memcmp16
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__memcmp16:
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li $t0,0
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li $t1,0
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beqz $a2,done /* 0 length string */
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beq $a0,$a1,done /* strings are identical */
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/* Unoptimised... */
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1: lhu $t0,0($a0)
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lhu $t1,0($a1)
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addu $a1,2
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bne $t0,$t1,done
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addu $a0,2
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subu $a2,1
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bnez $a2,1b
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done:
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subu $v0,$t0,$t1
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j $ra
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.end __memcmp16
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