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add missing v_swizzle_mask

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AzaezelX 2026-03-19 10:04:23 -05:00
parent 6fb3c84073
commit decab9210b
1 changed files with 18 additions and 0 deletions
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18
Engine/source/math/isa/neon/neon_intrinsics.h
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@ -59,6 +59,24 @@ namespace
); );
} }
inline f32x4 v_swizzle_mask(f32x4 v, const int x, const int y, const int z, const int w)
{
uint8x16_t table = vreinterpretq_u8_f32(v);
// Each float = 4 bytes, so build byte indices
uint8_t idx_data[16] = {
x * 4 + 0, x * 4 + 1, x * 4 + 2, x * 4 + 3,
y * 4 + 0, y * 4 + 1, y * 4 + 2, y * 4 + 3,
z * 4 + 0, z * 4 + 1, z * 4 + 2, z * 4 + 3,
w * 4 + 0, w * 4 + 1, w * 4 + 2, w * 4 + 3
};
uint8x16_t idx = vld1q_u8(idx_data);
uint8x16_t result = vqtbl1q_u8(table, idx);
return vreinterpretq_f32_u8(result);
}
inline f32x4 v_swizzle_singular_mask(f32x4 v, int x) inline f32x4 v_swizzle_singular_mask(f32x4 v, int x)
{ {
// base byte index of the float lane // base byte index of the float lane