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[NEON] optimize mask1bit128, get rid of simd_onebit_masks

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Konstantinos Margaritis 2022-09-07 10:20:01 +00:00
parent 02ae2a3cad
commit 0af2ba8616
1 changed files with 3 additions and 3 deletions
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6
src/util/arch/arm/simd_utils.h
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@ -577,9 +577,9 @@ m128 variable_byte_shift_m128(m128 in, s32 amount) {
static really_inline static really_inline
m128 mask1bit128(unsigned int n) { m128 mask1bit128(unsigned int n) {
assert(n < sizeof(m128) * 8); assert(n < sizeof(m128) * 8);
u32 mask_idx = ((n % 8) * 64) + 95; static m128 onebit = { 1, 0 };
mask_idx -= n / 8; m128 mask = lshiftbyte_m128( onebit, n / 8 );
return loadu128(&simd_onebit_masks[mask_idx]); return lshift64_m128( mask, n % 8 );
} }
// switches on bit N in the given vector. // switches on bit N in the given vector.