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runtime: use 64 bits of hash seed on arm64

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This is the same issue as #33960, but on gofrontend.

Reviewed-on: https://go-review.googlesource.com/c/gofrontend/+/220297
This commit is contained in:
eric fang
2020-02-20 06:57:11 +00:00
committed by Ian Lance Taylor
parent d43919bf88
commit 677ead3b34
2 changed files with 7 additions and 7 deletions
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2
gcc/go/gofrontend/MERGE
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@@ -1,4 +1,4 @@
89fbf55a409d37ae898e5c4ea4250035f86bed1b
0fe7a277c5d22265a73a4d216bd5d81799634453
The first line of this file holds the git revision number of the last
merge done from the gofrontend repository.

12
libgo/runtime/aeshash.c
View File

@@ -596,7 +596,7 @@ uintptr aeshashbody(void* p, uintptr seed, uintptr size, Slice aeskeysched) {
uintptr aeshashbody(void* p, uintptr seed, uintptr size, Slice aeskeysched) {
uint8x16_t *pseed;
uint32x4_t vinit32;
uint64x2_t vinit64;
uint8x16_t vinit;
uint8x16_t vseed, vseed2, vseed3, vseed4;
uint8x16_t vseed5, vseed6, vseed7, vseed8;
@@ -610,10 +610,10 @@ uintptr aeshashbody(void* p, uintptr seed, uintptr size, Slice aeskeysched) {
pseed = (uint8x16_t*)(aeskeysched.__values);
// Combined hash seed and length.
vinit32 = vdupq_n_u32(0);
vinit32[0] = (uint32)seed;
vinit32[1] = (uint32)size;
vinit = vreinterpretq_u8_u32(vinit32);
vinit64 = vdupq_n_u64(0);
vinit64[0] = (uint64)seed;
vinit64[1] = (uint64)size;
vinit = vreinterpretq_u8_u64(vinit64);
// Mix in per-process seed.
vseed = vaeseq_u8(*pseed, vinit);
@@ -626,7 +626,7 @@ uintptr aeshashbody(void* p, uintptr seed, uintptr size, Slice aeskeysched) {
// Return 64 bits of scrambled input seed.
return vreinterpretq_u64_u8(vseed)[0];
} else if (size < 16) {
vval = vreinterpretq_u8_u32(vdupq_n_u32(0));
vval = vreinterpretq_u8_u64(vdupq_n_u64(0));
if ((size & 8) != 0) {
vval = vreinterpretq_u8_u64(vld1q_lane_u64((uint64_t*)(p), vreinterpretq_u64_u8(vval), 0));
p = (void*)((uint64_t*)(p) + 1);