mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-28 11:18:45 +07:00
236 lines
2.9 KiB
ArmAsm
236 lines
2.9 KiB
ArmAsm
/*
|
|
* Author: Anton Blanchard <anton@au.ibm.com>
|
|
* Copyright 2015 IBM Corporation.
|
|
*
|
|
* This program is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU General Public License
|
|
* as published by the Free Software Foundation; either version
|
|
* 2 of the License, or (at your option) any later version.
|
|
*/
|
|
#include <asm/ppc_asm.h>
|
|
#include <asm/export.h>
|
|
|
|
#define off8 r6
|
|
#define off16 r7
|
|
#define off24 r8
|
|
|
|
#define rA r9
|
|
#define rB r10
|
|
#define rC r11
|
|
#define rD r27
|
|
#define rE r28
|
|
#define rF r29
|
|
#define rG r30
|
|
#define rH r31
|
|
|
|
#ifdef __LITTLE_ENDIAN__
|
|
#define LD ldbrx
|
|
#else
|
|
#define LD ldx
|
|
#endif
|
|
|
|
_GLOBAL(memcmp)
|
|
cmpdi cr1,r5,0
|
|
|
|
/* Use the short loop if both strings are not 8B aligned */
|
|
or r6,r3,r4
|
|
andi. r6,r6,7
|
|
|
|
/* Use the short loop if length is less than 32B */
|
|
cmpdi cr6,r5,31
|
|
|
|
beq cr1,.Lzero
|
|
bne .Lshort
|
|
bgt cr6,.Llong
|
|
|
|
.Lshort:
|
|
mtctr r5
|
|
|
|
1: lbz rA,0(r3)
|
|
lbz rB,0(r4)
|
|
subf. rC,rB,rA
|
|
bne .Lnon_zero
|
|
bdz .Lzero
|
|
|
|
lbz rA,1(r3)
|
|
lbz rB,1(r4)
|
|
subf. rC,rB,rA
|
|
bne .Lnon_zero
|
|
bdz .Lzero
|
|
|
|
lbz rA,2(r3)
|
|
lbz rB,2(r4)
|
|
subf. rC,rB,rA
|
|
bne .Lnon_zero
|
|
bdz .Lzero
|
|
|
|
lbz rA,3(r3)
|
|
lbz rB,3(r4)
|
|
subf. rC,rB,rA
|
|
bne .Lnon_zero
|
|
|
|
addi r3,r3,4
|
|
addi r4,r4,4
|
|
|
|
bdnz 1b
|
|
|
|
.Lzero:
|
|
li r3,0
|
|
blr
|
|
|
|
.Lnon_zero:
|
|
mr r3,rC
|
|
blr
|
|
|
|
.Llong:
|
|
li off8,8
|
|
li off16,16
|
|
li off24,24
|
|
|
|
std r31,-8(r1)
|
|
std r30,-16(r1)
|
|
std r29,-24(r1)
|
|
std r28,-32(r1)
|
|
std r27,-40(r1)
|
|
|
|
srdi r0,r5,5
|
|
mtctr r0
|
|
andi. r5,r5,31
|
|
|
|
LD rA,0,r3
|
|
LD rB,0,r4
|
|
|
|
LD rC,off8,r3
|
|
LD rD,off8,r4
|
|
|
|
LD rE,off16,r3
|
|
LD rF,off16,r4
|
|
|
|
LD rG,off24,r3
|
|
LD rH,off24,r4
|
|
cmpld cr0,rA,rB
|
|
|
|
addi r3,r3,32
|
|
addi r4,r4,32
|
|
|
|
bdz .Lfirst32
|
|
|
|
LD rA,0,r3
|
|
LD rB,0,r4
|
|
cmpld cr1,rC,rD
|
|
|
|
LD rC,off8,r3
|
|
LD rD,off8,r4
|
|
cmpld cr6,rE,rF
|
|
|
|
LD rE,off16,r3
|
|
LD rF,off16,r4
|
|
cmpld cr7,rG,rH
|
|
bne cr0,.LcmpAB
|
|
|
|
LD rG,off24,r3
|
|
LD rH,off24,r4
|
|
cmpld cr0,rA,rB
|
|
bne cr1,.LcmpCD
|
|
|
|
addi r3,r3,32
|
|
addi r4,r4,32
|
|
|
|
bdz .Lsecond32
|
|
|
|
.balign 16
|
|
|
|
1: LD rA,0,r3
|
|
LD rB,0,r4
|
|
cmpld cr1,rC,rD
|
|
bne cr6,.LcmpEF
|
|
|
|
LD rC,off8,r3
|
|
LD rD,off8,r4
|
|
cmpld cr6,rE,rF
|
|
bne cr7,.LcmpGH
|
|
|
|
LD rE,off16,r3
|
|
LD rF,off16,r4
|
|
cmpld cr7,rG,rH
|
|
bne cr0,.LcmpAB
|
|
|
|
LD rG,off24,r3
|
|
LD rH,off24,r4
|
|
cmpld cr0,rA,rB
|
|
bne cr1,.LcmpCD
|
|
|
|
addi r3,r3,32
|
|
addi r4,r4,32
|
|
|
|
bdnz 1b
|
|
|
|
.Lsecond32:
|
|
cmpld cr1,rC,rD
|
|
bne cr6,.LcmpEF
|
|
|
|
cmpld cr6,rE,rF
|
|
bne cr7,.LcmpGH
|
|
|
|
cmpld cr7,rG,rH
|
|
bne cr0,.LcmpAB
|
|
|
|
bne cr1,.LcmpCD
|
|
bne cr6,.LcmpEF
|
|
bne cr7,.LcmpGH
|
|
|
|
.Ltail:
|
|
ld r31,-8(r1)
|
|
ld r30,-16(r1)
|
|
ld r29,-24(r1)
|
|
ld r28,-32(r1)
|
|
ld r27,-40(r1)
|
|
|
|
cmpdi r5,0
|
|
beq .Lzero
|
|
b .Lshort
|
|
|
|
.Lfirst32:
|
|
cmpld cr1,rC,rD
|
|
cmpld cr6,rE,rF
|
|
cmpld cr7,rG,rH
|
|
|
|
bne cr0,.LcmpAB
|
|
bne cr1,.LcmpCD
|
|
bne cr6,.LcmpEF
|
|
bne cr7,.LcmpGH
|
|
|
|
b .Ltail
|
|
|
|
.LcmpAB:
|
|
li r3,1
|
|
bgt cr0,.Lout
|
|
li r3,-1
|
|
b .Lout
|
|
|
|
.LcmpCD:
|
|
li r3,1
|
|
bgt cr1,.Lout
|
|
li r3,-1
|
|
b .Lout
|
|
|
|
.LcmpEF:
|
|
li r3,1
|
|
bgt cr6,.Lout
|
|
li r3,-1
|
|
b .Lout
|
|
|
|
.LcmpGH:
|
|
li r3,1
|
|
bgt cr7,.Lout
|
|
li r3,-1
|
|
|
|
.Lout:
|
|
ld r31,-8(r1)
|
|
ld r30,-16(r1)
|
|
ld r29,-24(r1)
|
|
ld r28,-32(r1)
|
|
ld r27,-40(r1)
|
|
blr
|
|
EXPORT_SYMBOL(memcmp)
|