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core/crypto/sha2: Remove the broken Intel intrinsic kludge

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Yawning Angel
2026-03-16 15:51:54 +09:00
parent 9051f5a075
commit a030fb6596
1 changed files with 2 additions and 12 deletions
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14
core/crypto/sha2/sha256_impl_hw_intel.odin
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@@ -70,8 +70,7 @@ sha256_transf_hw :: proc "contextless" (ctx: ^Context_256, data: []byte) #no_bou
tmp = x86._mm_shuffle_epi32(tmp, 0xb1) // CDAB
state_1 = x86._mm_shuffle_epi32(state_1, 0x1b) // EFGH
state_0 := x86._mm_alignr_epi8(tmp, state_1, 8) // ABEF
// state_1 = x86._mm_blend_epi16(state_1, tmp, 0xf0) // CDGH
state_1 = kludge_mm_blend_epi16_0xf0(state_1, tmp)
state_1 = x86._mm_blend_epi16(state_1, tmp, 0xf0) // CDGH
data := data
for len(data) >= BLOCK_SIZE_256 {
@@ -238,18 +237,9 @@ sha256_transf_hw :: proc "contextless" (ctx: ^Context_256, data: []byte) #no_bou
// Write back the updated state
tmp = x86._mm_shuffle_epi32(state_0, 0x1b) // FEBA
state_1 = x86._mm_shuffle_epi32(state_1, 0xb1) // DCHG
// state_0 = x86._mm_blend_epi16(tmp, state_1, 0xf0) // DCBA
state_0 = kludge_mm_blend_epi16_0xf0(tmp, state_1)
state_0 = x86._mm_blend_epi16(tmp, state_1, 0xf0) // DCBA
state_1 = x86._mm_alignr_epi8(state_1, tmp, 8) // ABEF
intrinsics.unaligned_store((^x86.__m128i)(&ctx.h[0]), state_0)
intrinsics.unaligned_store((^x86.__m128i)(&ctx.h[4]), state_1)
}
@(private = "file")
kludge_mm_blend_epi16_0xf0 :: #force_inline proc "contextless"(a, b: x86.__m128i) -> x86.__m128i {
// HACK HACK HACK: LLVM got rid of `llvm.x86.sse41.pblendw`.
a_ := simd.to_array(a)
b_ := simd.to_array(b)
return x86.__m128i{a_[0], b_[1]}
}