sha3.c: permute_n_avx2(): replace two instances of permute4x64_epi64() with shuffle_epi32()

1 files changed, 2 insertions, 4 deletions

diff --git a/sha3.c b/sha3.c
index b582cc2..cedd670 100644
--- a/sha3.c
+++ b/sha3.c
@@ -581,7 +581,6 @@ static const __m256i LM0 = { ~0,  0,  0,  0 }, // only lane 0
 #define PI_T3_LO 0x90 // 0b10010000 -> 0x90
 #define PI_T3_HI 0x03
 #define PI_T4_LO 0x0e // 0b00001110 -> 0x0e
-#define PI_T4_HI 0x01
 
 // chi blend mask
 #define CHI_MASK 0xc0 // 0b11000000
@@ -589,14 +588,13 @@ static const __m256i LM0 = { ~0,  0,  0,  0 }, // only lane 0
 // chi permute IDs
 #define CHI_I0_LO 0x39 // 1, 2, 3, 0 -> 0b00111001 -> 0x39
 #define CHI_I1_LO 0x0e // 2, 3, 0, 0 -> 0b00001110 -> 0x0e
-#define CHI_I1_HI 0x01 // 1, 0, 0, 0 -> 0b00000001 -> 0x01
 
 // chi step
 #define CHI(LO, HI) do { \
 	const __m256i a_lo = _mm256_blend_epi32(_mm256_permute4x64_epi64(LO, CHI_I0_LO), _mm256_permute4x64_epi64(HI, CHI_I0_LO), CHI_MASK), \
 								a_hi = LO, \
 								b_lo = (_mm256_permute4x64_epi64(LO, CHI_I1_LO) & ~LM2) | (_mm256_permute4x64_epi64(HI, CHI_I1_LO) & ~LM0), \
-								b_hi = _mm256_permute4x64_epi64(LO, CHI_I1_HI); \
+								b_hi = _mm256_shuffle_epi32(LO, 0x0e); \
   \
 	LO ^= _mm256_andnot_si256(a_lo, b_lo); HI ^= _mm256_andnot_si256(a_hi, b_hi); \
 } while (0)
@@ -713,7 +711,7 @@ static inline void permute_n_avx2(uint64_t s[static 25], const size_t num_rounds
                             (_mm256_permute4x64_epi64(r1_lo, PI_T4_LO) & LM1) |
                             (_mm256_permute4x64_epi64(r2_hi, PI_T4_LO) & LM2) |
                             (_mm256_permute4x64_epi64(r3_lo, PI_T4_LO) & LM3),
-                    t4_hi = _mm256_permute4x64_epi64(r4_lo, PI_T4_HI);
+                    t4_hi = _mm256_shuffle_epi32(r4_lo, 0x0e);
 
       r0_lo = t0_lo; r0_hi = t0_hi & LM0;
       r1_lo = t1_lo; r1_hi = t1_hi & LM0;