runtime: use 64 bits of hash seed on arm64
This is the same issue as #33960, but on gofrontend.
Change-Id: I949c2283cd2c26acece6b2ce79f3a5a26bddfd4a
Reviewed-on: https://go-review.googlesource.com/c/gofrontend/+/220297
Reviewed-by: Cherry Zhang <cherryyz@google.com>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
diff --git a/libgo/runtime/aeshash.c b/libgo/runtime/aeshash.c
index 00658d7..93f28fd 100644
--- a/libgo/runtime/aeshash.c
+++ b/libgo/runtime/aeshash.c
@@ -596,7 +596,7 @@
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 @@
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 @@
// 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);
