diff options
| author |   Damjan Marion <damjan.marion@gmail.com> | 2020-02-13 18:14:06 +0100 |
|---|---|---|
| committer | Damjan Marion <damjan.marion@gmail.com> | 2020-02-13 18:17:54 +0100 |
| commit | f75defa7676759fa81ae75e7edd492572c6b8fd6 (patch) | |
| tree | da5eecdcdec868d14d81db8c59e2d1271899d49b /src/vppinfra/vector_sse42.h | |
| parent | adcfb15fa0b08403c5b5b170149f7d3662e65761 (diff) | |
vppinfra: add 128-bit and 512-bit a ^ b ^ c shortcut
This allows us to combine 2 XOR operations into signle instruction
which makes difference in crypto op:
- in x86, by using ternary logic instruction
- on ARM, by using EOR3 instruction (available with sha3 feature)
Type: refactor
Change-Id: Ibdf9001840399d2f838d491ca81b57cbd8430433
Signed-off-by: Damjan Marion <damjan.marion@gmail.com>
Diffstat (limited to 'src/vppinfra/vector_sse42.h')
| -rw-r--r-- | src/vppinfra/vector_sse42.h | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/src/vppinfra/vector_sse42.h b/src/vppinfra/vector_sse42.h index c22e86e7437..e75580e6026 100644 --- a/src/vppinfra/vector_sse42.h +++ b/src/vppinfra/vector_sse42.h @@ -746,6 +746,15 @@ u8x16_blend (u8x16 v1, u8x16 v2, u8x16 mask) return (u8x16) _mm_blendv_epi8 ((__m128i) v1, (__m128i) v2, (__m128i) mask); } +static_always_inline u8x16 +u8x16_xor3 (u8x16 a, u8x16 b, u8x16 c) +{ +#if __AVX512F__ + return (u8x16) _mm_ternarylogic_epi32 ((__m128i) a, (__m128i) b, + (__m128i) c, 0x96); +#endif + return a ^ b ^ c; +} #endif /* included_vector_sse2_h */ |