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internal/bytealg: port bytealg functions to reg ABI on s390x
This adds support for the reg ABI to the byte/string functions for s390x. These are initially under control of the GOEXPERIMENT macro until all changes are in. Updates #40724 Change-Id: Ia3532523fe3a839cc0370d6fe1544972327be514 Reviewed-on: https://go-review.googlesource.com/c/go/+/719481 Reviewed-by: Vishwanatha HD <vishwanatha.hd@ibm.com> Reviewed-by: David Chase <drchase@google.com> Reviewed-by: Keith Randall <khr@google.com> LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com> Reviewed-by: Keith Randall <khr@golang.org>
This commit is contained in:
Srinivas Pokala
Keith Randall
parent
4529c8fba6
commit
2fe0ba8d52
3 changed files with 225 additions and 155 deletions
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@ -5,65 +5,93 @@
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#include "go_asm.h"
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#include "go_asm.h"
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#include "textflag.h"
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#include "textflag.h"
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TEXT ·Compare(SB),NOSPLIT|NOFRAME,$0-56
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TEXT ·Compare<ABIInternal>(SB),NOSPLIT|NOFRAME,$0-56
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MOVD a_base+0(FP), R3
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#ifndef GOEXPERIMENT_regabiargs
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MOVD a_len+8(FP), R4
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MOVD a_base+0(FP), R2
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MOVD b_base+24(FP), R5
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MOVD a_len+8(FP), R3
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MOVD b_len+32(FP), R6
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MOVD b_base+24(FP), R4
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LA ret+48(FP), R7
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MOVD b_len+32(FP), R5
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LA ret+48(FP), R6
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#else
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// R2 = a_base
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// R3 = a_len
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// R4 = a_cap (unused)
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// R5 = b_base (want in R4)
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// R6 = b_len (want in R5)
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// R7 = b_cap (unused)
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MOVD R5, R4
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MOVD R6, R5
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#endif
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BR cmpbody<>(SB)
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BR cmpbody<>(SB)
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TEXT runtime·cmpstring(SB),NOSPLIT|NOFRAME,$0-40
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TEXT runtime·cmpstring<ABIInternal>(SB),NOSPLIT|NOFRAME,$0-40
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MOVD a_base+0(FP), R3
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#ifndef GOEXPERIMENT_regabiargs
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MOVD a_len+8(FP), R4
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MOVD a_base+0(FP), R2
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MOVD b_base+16(FP), R5
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MOVD a_len+8(FP), R3
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MOVD b_len+24(FP), R6
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MOVD b_base+16(FP), R4
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LA ret+32(FP), R7
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MOVD b_len+24(FP), R5
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LA ret+32(FP), R6
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#endif
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// R2 = a_base
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// R3 = a_len
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// R4 = b_base
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// R5 = b_len
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BR cmpbody<>(SB)
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BR cmpbody<>(SB)
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// input:
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// input:
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// R3 = a
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// R2 = a
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// R4 = alen
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// R3 = alen
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// R5 = b
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// R4 = b
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// R6 = blen
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// R5 = blen
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// R7 = address of output word (stores -1/0/1 here)
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// For regabiargs output value( -1/0/1 ) stored in R2
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// For !regabiargs address of output word( stores -1/0/1 ) stored in R6
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TEXT cmpbody<>(SB),NOSPLIT|NOFRAME,$0-0
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TEXT cmpbody<>(SB),NOSPLIT|NOFRAME,$0-0
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CMPBEQ R3, R5, cmplengths
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CMPBEQ R2, R4, cmplengths
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MOVD R4, R8
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MOVD R3, R7
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CMPBLE R4, R6, amin
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CMPBLE R3, R5, amin
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MOVD R6, R8
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MOVD R5, R7
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amin:
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amin:
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CMPBEQ R8, $0, cmplengths
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CMPBEQ R7, $0, cmplengths
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CMP R8, $256
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CMP R7, $256
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BLE tail
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BLE tail
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loop:
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loop:
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CLC $256, 0(R3), 0(R5)
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CLC $256, 0(R2), 0(R4)
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BGT gt
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BGT gt
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BLT lt
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BLT lt
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SUB $256, R8
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SUB $256, R7
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MOVD $256(R3), R3
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MOVD $256(R2), R2
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MOVD $256(R5), R5
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MOVD $256(R4), R4
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CMP R8, $256
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CMP R7, $256
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BGT loop
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BGT loop
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tail:
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tail:
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SUB $1, R8
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SUB $1, R7
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EXRL $cmpbodyclc<>(SB), R8
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EXRL $cmpbodyclc<>(SB), R7
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BGT gt
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BGT gt
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BLT lt
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BLT lt
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cmplengths:
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cmplengths:
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CMP R4, R6
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CMP R3, R5
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BEQ eq
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BEQ eq
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BLT lt
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BLT lt
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gt:
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gt:
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MOVD $1, 0(R7)
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MOVD $1, R2
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#ifndef GOEXPERIMENT_regabiargs
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MOVD R2, 0(R6)
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#endif
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RET
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RET
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lt:
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lt:
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MOVD $-1, 0(R7)
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MOVD $-1, R2
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#ifndef GOEXPERIMENT_regabiargs
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MOVD R2, 0(R6)
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#endif
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RET
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RET
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eq:
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eq:
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MOVD $0, 0(R7)
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MOVD $0, R2
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#ifndef GOEXPERIMENT_regabiargs
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MOVD R2, 0(R6)
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#endif
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RET
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RET
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TEXT cmpbodyclc<>(SB),NOSPLIT|NOFRAME,$0-0
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TEXT cmpbodyclc<>(SB),NOSPLIT|NOFRAME,$0-0
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CLC $1, 0(R3), 0(R5)
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CLC $1, 0(R2), 0(R4)
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RET
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RET
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@ -6,80 +6,92 @@
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#include "textflag.h"
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#include "textflag.h"
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// memequal(a, b unsafe.Pointer, size uintptr) bool
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// memequal(a, b unsafe.Pointer, size uintptr) bool
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TEXT runtime·memequal(SB),NOSPLIT|NOFRAME,$0-25
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TEXT runtime·memequal<ABIInternal>(SB),NOSPLIT|NOFRAME,$0-25
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MOVD a+0(FP), R3
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#ifndef GOEXPERIMENT_regabiargs
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MOVD b+8(FP), R5
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MOVD a+0(FP), R2
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MOVD size+16(FP), R6
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MOVD b+8(FP), R3
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LA ret+24(FP), R7
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MOVD size+16(FP), R4
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LA ret+24(FP), R5
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#endif
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BR memeqbody<>(SB)
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BR memeqbody<>(SB)
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// memequal_varlen(a, b unsafe.Pointer) bool
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// memequal_varlen(a, b unsafe.Pointer) bool
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TEXT runtime·memequal_varlen(SB),NOSPLIT|NOFRAME,$0-17
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TEXT runtime·memequal_varlen<ABIInternal>(SB),NOSPLIT|NOFRAME,$0-17
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MOVD a+0(FP), R3
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#ifndef GOEXPERIMENT_regabiargs
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MOVD b+8(FP), R5
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MOVD a+0(FP), R2
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MOVD 8(R12), R6 // compiler stores size at offset 8 in the closure
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MOVD b+8(FP), R3
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LA ret+16(FP), R7
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LA ret+16(FP), R5
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#endif
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MOVD 8(R12), R4 // compiler stores size at offset 8 in the closure
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BR memeqbody<>(SB)
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BR memeqbody<>(SB)
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// input:
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// input:
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// R3 = a
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// R2 = a
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// R5 = b
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// R3 = b
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// R6 = len
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// R4 = len
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// R7 = address of output byte (stores 0 or 1 here)
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// For regabiargs output value( 0/1 ) stored in R2
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// For !regabiargs address of output byte( stores 0/1 ) stored in R5
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// a and b have the same length
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// a and b have the same length
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TEXT memeqbody<>(SB),NOSPLIT|NOFRAME,$0-0
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TEXT memeqbody<>(SB),NOSPLIT|NOFRAME,$0-0
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CMPBEQ R3, R5, equal
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CMPBEQ R2, R3, equal
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loop:
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loop:
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CMPBEQ R6, $0, equal
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CMPBEQ R4, $0, equal
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CMPBLT R6, $32, tiny
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CMPBLT R4, $32, tiny
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CMP R6, $256
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CMP R4, $256
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BLT tail
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BLT tail
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CLC $256, 0(R3), 0(R5)
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CLC $256, 0(R2), 0(R3)
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BNE notequal
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BNE notequal
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SUB $256, R6
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SUB $256, R4
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LA 256(R2), R2
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LA 256(R3), R3
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LA 256(R3), R3
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LA 256(R5), R5
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BR loop
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BR loop
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tail:
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tail:
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SUB $1, R6, R8
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SUB $1, R4, R8
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EXRL $memeqbodyclc<>(SB), R8
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EXRL $memeqbodyclc<>(SB), R8
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BEQ equal
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BEQ equal
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notequal:
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notequal:
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MOVB $0, 0(R7)
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MOVD $0, R2
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#ifndef GOEXPERIMENT_regabiargs
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MOVB R2, 0(R5)
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#endif
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RET
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RET
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equal:
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equal:
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MOVB $1, 0(R7)
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MOVD $1, R2
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#ifndef GOEXPERIMENT_regabiargs
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MOVB R2, 0(R5)
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#endif
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RET
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RET
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tiny:
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tiny:
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MOVD $0, R2
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MOVD $0, R1
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CMPBLT R6, $16, lt16
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CMPBLT R4, $16, lt16
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MOVD 0(R3), R8
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MOVD 0(R2), R8
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MOVD 0(R5), R9
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MOVD 0(R3), R9
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CMPBNE R8, R9, notequal
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CMPBNE R8, R9, notequal
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MOVD 8(R3), R8
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MOVD 8(R2), R8
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MOVD 8(R5), R9
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MOVD 8(R3), R9
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CMPBNE R8, R9, notequal
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CMPBNE R8, R9, notequal
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LA 16(R2), R2
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LA 16(R1), R1
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SUB $16, R6
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SUB $16, R4
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lt16:
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lt16:
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CMPBLT R6, $8, lt8
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CMPBLT R4, $8, lt8
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MOVD 0(R3)(R2*1), R8
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MOVD 0(R2)(R1*1), R8
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MOVD 0(R5)(R2*1), R9
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MOVD 0(R3)(R1*1), R9
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CMPBNE R8, R9, notequal
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CMPBNE R8, R9, notequal
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LA 8(R2), R2
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LA 8(R1), R1
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SUB $8, R6
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SUB $8, R4
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lt8:
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lt8:
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CMPBLT R6, $4, lt4
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CMPBLT R4, $4, lt4
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MOVWZ 0(R3)(R2*1), R8
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MOVWZ 0(R2)(R1*1), R8
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MOVWZ 0(R5)(R2*1), R9
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MOVWZ 0(R3)(R1*1), R9
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CMPBNE R8, R9, notequal
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CMPBNE R8, R9, notequal
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LA 4(R2), R2
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LA 4(R1), R1
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SUB $4, R6
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SUB $4, R4
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lt4:
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lt4:
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#define CHECK(n) \
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#define CHECK(n) \
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CMPBEQ R6, $n, equal \
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CMPBEQ R4, $n, equal \
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MOVB n(R3)(R2*1), R8 \
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MOVB n(R2)(R1*1), R8 \
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MOVB n(R5)(R2*1), R9 \
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MOVB n(R3)(R1*1), R9 \
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CMPBNE R8, R9, notequal
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CMPBNE R8, R9, notequal
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CHECK(0)
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CHECK(0)
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CHECK(1)
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CHECK(1)
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@ -88,5 +100,5 @@ lt4:
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BR equal
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BR equal
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TEXT memeqbodyclc<>(SB),NOSPLIT|NOFRAME,$0-0
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TEXT memeqbodyclc<>(SB),NOSPLIT|NOFRAME,$0-0
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CLC $1, 0(R3), 0(R5)
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CLC $1, 0(R2), 0(R3)
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RET
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RET
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@ -5,104 +5,134 @@
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#include "go_asm.h"
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#include "go_asm.h"
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#include "textflag.h"
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#include "textflag.h"
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TEXT ·IndexByte(SB),NOSPLIT|NOFRAME,$0-40
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MOVD b_base+0(FP), R3// b_base => R3
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MOVD b_len+8(FP), R4 // b_len => R4
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MOVBZ c+24(FP), R5 // c => R5
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MOVD $ret+32(FP), R2 // &ret => R9
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BR indexbytebody<>(SB)
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TEXT ·IndexByteString(SB),NOSPLIT|NOFRAME,$0-32
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TEXT ·IndexByte<ABIInternal>(SB),NOSPLIT|NOFRAME,$0-40
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MOVD s_base+0(FP), R3// s_base => R3
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#ifndef GOEXPERIMENT_regabiargs
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MOVD s_len+8(FP), R4 // s_len => R4
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MOVD b_base+0(FP), R2// b_base => R2
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MOVBZ c+16(FP), R5 // c => R5
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MOVD b_len+8(FP), R3 // b_len => R3
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MOVD $ret+24(FP), R2 // &ret => R9
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MOVBZ c+24(FP), R4 // c => R4
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BR indexbytebody<>(SB)
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MOVD $ret+32(FP), R5 // &ret => R5
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#else
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MOVD R5, R4
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AND $0xff, R4
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#endif
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BR indexbytebody<>(SB)
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TEXT ·IndexByteString<ABIInternal>(SB),NOSPLIT|NOFRAME,$0-32
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#ifndef GOEXPERIMENT_regabiargs
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MOVD s_base+0(FP), R2 // s_base => R2
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MOVD s_len+8(FP), R3 // s_len => R3
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MOVBZ c+16(FP), R4 // c => R4
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MOVD $ret+24(FP), R5 // &ret => R5
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#else
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AND $0xff, R4
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#endif
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BR indexbytebody<>(SB)
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// input:
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// input:
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// R3: s
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// R2: s
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// R4: s_len
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// R3: s_len
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// R5: c -- byte sought
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// R4: c -- byte sought
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// R2: &ret -- address to put index into
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// For regabiargs output value(index) stored in R2
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// For !regabiargs address of output value(index) stored in R5
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TEXT indexbytebody<>(SB),NOSPLIT|NOFRAME,$0
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TEXT indexbytebody<>(SB),NOSPLIT|NOFRAME,$0
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CMPBEQ R4, $0, notfound
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CMPBEQ R3, $0, notfound
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MOVD R3, R6 // store base for later
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MOVD R2, R6 // store base for later
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ADD R3, R4, R8 // the address after the end of the string
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ADD R2, R3, R8 // the address after the end of the string
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//if the length is small, use loop; otherwise, use vector or srst search
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//if the length is small, use loop; otherwise, use vector or srst search
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CMPBGE R4, $16, large
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CMPBGE R3, $16, large
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residual:
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residual:
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CMPBEQ R3, R8, notfound
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CMPBEQ R2, R8, notfound
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MOVBZ 0(R3), R7
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MOVBZ 0(R2), R7
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LA 1(R3), R3
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LA 1(R2), R2
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CMPBNE R7, R5, residual
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CMPBNE R7, R4, residual
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found:
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found:
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SUB R6, R3
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SUB R6, R2
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SUB $1, R3
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SUB $1, R2
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MOVD R3, 0(R2)
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#ifndef GOEXPERIMENT_regabiargs
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RET
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MOVD R2, 0(R5)
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#endif
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RET
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notfound:
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notfound:
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MOVD $-1, 0(R2)
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#ifndef GOEXPERIMENT_regabiargs
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RET
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MOVD $-1, 0(R5)
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#else
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MOVD $-1, R2
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#endif
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RET
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large:
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large:
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MOVBZ internal∕cpu·S390X+const_offsetS390xHasVX(SB), R1
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MOVBZ internal∕cpu·S390X+const_offsetS390xHasVX(SB), R1
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CMPBNE R1, $0, vectorimpl
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CMPBNE R1, $0, vectorimpl
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srstimpl: // no vector facility
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srstimpl: // no vector facility
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MOVBZ R5, R0 // c needs to be in R0, leave until last minute as currently R0 is expected to be 0
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MOVBZ R4, R0 // c needs to be in R0, leave until last minute as currently R0 is expected to be 0
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srstloop:
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srstloop:
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WORD $0xB25E0083 // srst %r8, %r3 (search the range [R3, R8))
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WORD $0xB25E0082 // srst %r8, %r2 (search the range [R2, R8))
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BVS srstloop // interrupted - continue
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BVS srstloop // interrupted - continue
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BGT notfoundr0
|
BGT notfoundr0
|
||||||
foundr0:
|
foundr0:
|
||||||
XOR R0, R0 // reset R0
|
XOR R0, R0 // reset R0
|
||||||
SUB R6, R8 // remove base
|
SUB R6, R8 // remove base
|
||||||
MOVD R8, 0(R2)
|
#ifndef GOEXPERIMENT_regabiargs
|
||||||
RET
|
MOVD R8, 0(R5)
|
||||||
|
#else
|
||||||
|
MOVD R8, R2
|
||||||
|
#endif
|
||||||
|
RET
|
||||||
notfoundr0:
|
notfoundr0:
|
||||||
XOR R0, R0 // reset R0
|
XOR R0, R0 // reset R0
|
||||||
MOVD $-1, 0(R2)
|
#ifndef GOEXPERIMENT_regabiargs
|
||||||
RET
|
MOVD $-1, 0(R5)
|
||||||
|
#else
|
||||||
|
MOVD $-1, R2
|
||||||
|
#endif
|
||||||
|
RET
|
||||||
|
|
||||||
vectorimpl:
|
vectorimpl:
|
||||||
//if the address is not 16byte aligned, use loop for the header
|
//if the address is not 16byte aligned, use loop for the header
|
||||||
MOVD R3, R8
|
MOVD R2, R8
|
||||||
AND $15, R8
|
AND $15, R8
|
||||||
CMPBGT R8, $0, notaligned
|
CMPBGT R8, $0, notaligned
|
||||||
|
|
||||||
aligned:
|
aligned:
|
||||||
ADD R6, R4, R8
|
ADD R6, R3, R8
|
||||||
MOVD R8, R7
|
MOVD R8, R7
|
||||||
AND $-16, R7
|
AND $-16, R7
|
||||||
// replicate c across V17
|
// replicate c across V17
|
||||||
VLVGB $0, R5, V19
|
VLVGB $0, R4, V19
|
||||||
VREPB $0, V19, V17
|
VREPB $0, V19, V17
|
||||||
|
|
||||||
vectorloop:
|
vectorloop:
|
||||||
CMPBGE R3, R7, residual
|
CMPBGE R2, R7, residual
|
||||||
VL 0(R3), V16 // load string to be searched into V16
|
VL 0(R2), V16 // load string to be searched into V16
|
||||||
ADD $16, R3
|
ADD $16, R2
|
||||||
VFEEBS V16, V17, V18 // search V17 in V16 and set conditional code accordingly
|
VFEEBS V16, V17, V18 // search V17 in V16 and set conditional code accordingly
|
||||||
BVS vectorloop
|
BVS vectorloop
|
||||||
|
|
||||||
// when vector search found c in the string
|
// when vector search found c in the string
|
||||||
VLGVB $7, V18, R7 // load 7th element of V18 containing index into R7
|
VLGVB $7, V18, R7 // load 7th element of V18 containing index into R7
|
||||||
SUB $16, R3
|
SUB $16, R2
|
||||||
SUB R6, R3
|
SUB R6, R2
|
||||||
ADD R3, R7
|
ADD R2, R7
|
||||||
MOVD R7, 0(R2)
|
#ifndef GOEXPERIMENT_regabiargs
|
||||||
RET
|
MOVD R7, 0(R5)
|
||||||
|
#else
|
||||||
|
MOVD R7, R2
|
||||||
|
#endif
|
||||||
|
RET
|
||||||
|
|
||||||
notaligned:
|
notaligned:
|
||||||
MOVD R3, R8
|
MOVD R2, R8
|
||||||
AND $-16, R8
|
AND $-16, R8
|
||||||
ADD $16, R8
|
ADD $16, R8
|
||||||
notalignedloop:
|
notalignedloop:
|
||||||
CMPBEQ R3, R8, aligned
|
CMPBEQ R2, R8, aligned
|
||||||
MOVBZ 0(R3), R7
|
MOVBZ 0(R2), R7
|
||||||
LA 1(R3), R3
|
LA 1(R2), R2
|
||||||
CMPBNE R7, R5, notalignedloop
|
CMPBNE R7, R4, notalignedloop
|
||||||
BR found
|
BR found
|
||||||
|
|
||||||
|
|
|
||||||
Loading…
Add table
Add a link
Reference in a new issue