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core/crypto/_aes/hw_intel: Use a constant for the PSHUFB indicies

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Yawning Angel
2024-07-16 20:03:20 +09:00
parent b9293334ca
commit dfc4df9807
2 changed files with 3 additions and 7 deletions
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2
core/crypto/_aes/hw_intel/api.odin
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@@ -3,7 +3,7 @@ package aes_hw_intel
import "core:sys/info"
// is_supporte returns true iff hardware accelerated AES
// is_supported returns true iff hardware accelerated AES
// is supported.
is_supported :: proc "contextless" () -> bool {
features, ok := info.cpu_features.?

8
core/crypto/_aes/hw_intel/ghash.odin
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@@ -25,7 +25,6 @@ package aes_hw_intel
import "base:intrinsics"
import "core:crypto/_aes"
import "core:simd"
import "core:simd/x86"
@(private = "file")
@@ -58,14 +57,11 @@ GHASH_STRIDE_BYTES_HW :: GHASH_STRIDE_HW * _aes.GHASH_BLOCK_SIZE
// chunks. We number chunks from 0 to 3 in left to right order.
@(private = "file")
byteswap_index := transmute(x86.__m128i)simd.i8x16{
// Note: simd.i8x16 is reverse order from x86._mm_set_epi8.
15, 14, 13, 12, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1, 0,
}
_BYTESWAP_INDEX: x86.__m128i : { 0x08090a0b0c0d0e0f, 0x0001020304050607 }
@(private = "file", require_results, enable_target_feature = "sse2,ssse3")
byteswap :: #force_inline proc "contextless" (x: x86.__m128i) -> x86.__m128i {
return x86._mm_shuffle_epi8(x, byteswap_index)
return x86._mm_shuffle_epi8(x, _BYTESWAP_INDEX)
}
// From a 128-bit value kw, compute kx as the XOR of the two 64-bit