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runtime: use all 64 bits of hash seed on arm64 

Fixes #33960

Change-Id: I4f8cf65dcf4140a97e7b368572b31c171c453316
Reviewed-on: https://go-review.googlesource.com/c/go/+/192498
Run-TryBot: Keith Randall <khr@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Cherry Zhang <cherryyz@google.com>
This commit is contained in:
Keith Randall 2019-08-29 16:21:58 -07:00 committed by Keith Randall
parent 5411953df5
commit f484e9699d
1 changed files with 5 additions and 5 deletions
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10
src/runtime/asm_arm64.s
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@ -504,7 +504,7 @@ TEXT runtime·memhash(SB),NOSPLIT|NOFRAME,$0-32
BEQ noaes
MOVD p+0(FP), R0
MOVD s+16(FP), R1
MOVWU h+8(FP), R3
MOVD h+8(FP), R3
MOVD $ret+24(FP), R2
B aeshashbody<>(SB)
noaes:
@ -517,20 +517,20 @@ TEXT runtime·strhash(SB),NOSPLIT|NOFRAME,$0-24
BEQ noaes
MOVD p+0(FP), R10 // string pointer
LDP (R10), (R0, R1) //string data/ length
MOVWU h+8(FP), R3
MOVD h+8(FP), R3
MOVD $ret+16(FP), R2 // return adddress
B aeshashbody<>(SB)
noaes:
B runtime·strhashFallback(SB)
// R0: data
// R1: length (maximum 32 bits)
// R1: length
// R2: address to put return value
// R3: seed data
TEXT aeshashbody<>(SB),NOSPLIT|NOFRAME,$0
VEOR V30.B16, V30.B16, V30.B16
VMOV R3, V30.S[0]
VMOV R1, V30.S[1] // load length into seed
VMOV R3, V30.D[0]
VMOV R1, V30.D[1] // load length into seed
MOVD $runtime·aeskeysched+0(SB), R4
VLD1.P 16(R4), [V0.B16]