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| author | Keith Randall <khr@golang.org> | 2018-03-03 14:24:54 -0800 |
|---|---|---|
| committer | Keith Randall <khr@golang.org> | 2018-03-04 17:49:39 +0000 |
| commit | f6332bb84ad87e958290ae23b29a2b13a41ee2a2 (patch) | |
| tree | f09ef9174bee3ae86920a113318f4a322a1a98ad /src/runtime/asm_arm64.s | |
| parent | 45964e4f9c950863adcaeb62fbe49f3fa913f27d (diff) | |
| download | go-f6332bb84ad87e958290ae23b29a2b13a41ee2a2.tar.gz go-f6332bb84ad87e958290ae23b29a2b13a41ee2a2.zip | |
internal/bytealg: move compare functions to bytealg
Move bytes.Compare and runtime·cmpstring to bytealg.
Update #19792
Change-Id: I139e6d7c59686bef7a3017e3dec99eba5fd10447
Reviewed-on: https://go-review.googlesource.com/98515
Run-TryBot: Keith Randall <khr@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Diffstat (limited to 'src/runtime/asm_arm64.s')
| -rw-r--r-- | src/runtime/asm_arm64.s | 52 |
1 files changed, 0 insertions, 52 deletions
diff --git a/src/runtime/asm_arm64.s b/src/runtime/asm_arm64.s index 00999d4664..ef32beecb5 100644 --- a/src/runtime/asm_arm64.s +++ b/src/runtime/asm_arm64.s @@ -712,58 +712,6 @@ TEXT runtime·abort(SB),NOSPLIT|NOFRAME,$0-0 B (ZR) UNDEF -TEXT runtime·cmpstring(SB),NOSPLIT|NOFRAME,$0-40 - MOVD s1_base+0(FP), R2 - MOVD s1_len+8(FP), R0 - MOVD s2_base+16(FP), R3 - MOVD s2_len+24(FP), R1 - ADD $40, RSP, R7 - B runtime·cmpbody<>(SB) - -TEXT bytes·Compare(SB),NOSPLIT|NOFRAME,$0-56 - MOVD s1+0(FP), R2 - MOVD s1+8(FP), R0 - MOVD s2+24(FP), R3 - MOVD s2+32(FP), R1 - ADD $56, RSP, R7 - B runtime·cmpbody<>(SB) - -// On entry: -// R0 is the length of s1 -// R1 is the length of s2 -// R2 points to the start of s1 -// R3 points to the start of s2 -// R7 points to return value (-1/0/1 will be written here) -// -// On exit: -// R4, R5, and R6 are clobbered -TEXT runtime·cmpbody<>(SB),NOSPLIT|NOFRAME,$0-0 - CMP R2, R3 - BEQ samebytes // same starting pointers; compare lengths - CMP R0, R1 - CSEL LT, R1, R0, R6 // R6 is min(R0, R1) - - ADD R2, R6 // R2 is current byte in s1, R6 is last byte in s1 to compare -loop: - CMP R2, R6 - BEQ samebytes // all compared bytes were the same; compare lengths - MOVBU.P 1(R2), R4 - MOVBU.P 1(R3), R5 - CMP R4, R5 - BEQ loop - // bytes differed - MOVD $1, R4 - CSNEG LT, R4, R4, R4 - MOVD R4, (R7) - RET -samebytes: - MOVD $1, R4 - CMP R0, R1 - CSNEG LT, R4, R4, R4 - CSEL EQ, ZR, R4, R4 - MOVD R4, (R7) - RET - TEXT runtime·return0(SB), NOSPLIT, $0 MOVW $0, R0 RET |