runtime: use 64 bits of hash seed on arm64
This is the same issue as #33960, but on gofrontend. Reviewed-on: https://go-review.googlesource.com/c/gofrontend/+/220297
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@ -1,4 +1,4 @@
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89fbf55a409d37ae898e5c4ea4250035f86bed1b
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0fe7a277c5d22265a73a4d216bd5d81799634453
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The first line of this file holds the git revision number of the last
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merge done from the gofrontend repository.
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@ -596,7 +596,7 @@ uintptr aeshashbody(void* p, uintptr seed, uintptr size, Slice aeskeysched) {
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uintptr aeshashbody(void* p, uintptr seed, uintptr size, Slice aeskeysched) {
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uint8x16_t *pseed;
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uint32x4_t vinit32;
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uint64x2_t vinit64;
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uint8x16_t vinit;
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uint8x16_t vseed, vseed2, vseed3, vseed4;
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uint8x16_t vseed5, vseed6, vseed7, vseed8;
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@ -610,10 +610,10 @@ uintptr aeshashbody(void* p, uintptr seed, uintptr size, Slice aeskeysched) {
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pseed = (uint8x16_t*)(aeskeysched.__values);
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// Combined hash seed and length.
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vinit32 = vdupq_n_u32(0);
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vinit32[0] = (uint32)seed;
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vinit32[1] = (uint32)size;
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vinit = vreinterpretq_u8_u32(vinit32);
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vinit64 = vdupq_n_u64(0);
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vinit64[0] = (uint64)seed;
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vinit64[1] = (uint64)size;
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vinit = vreinterpretq_u8_u64(vinit64);
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// Mix in per-process seed.
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vseed = vaeseq_u8(*pseed, vinit);
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@ -626,7 +626,7 @@ uintptr aeshashbody(void* p, uintptr seed, uintptr size, Slice aeskeysched) {
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// Return 64 bits of scrambled input seed.
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return vreinterpretq_u64_u8(vseed)[0];
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} else if (size < 16) {
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vval = vreinterpretq_u8_u32(vdupq_n_u32(0));
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vval = vreinterpretq_u8_u64(vdupq_n_u64(0));
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if ((size & 8) != 0) {
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vval = vreinterpretq_u8_u64(vld1q_lane_u64((uint64_t*)(p), vreinterpretq_u64_u8(vval), 0));
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p = (void*)((uint64_t*)(p) + 1);
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