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update meshoptimizer to 0.16

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This commit is contained in:
Hendrik Brucker
2021-04-18 16:15:43 +02:00
parent c05245f539
commit 9d18610190
8 changed files with 897 additions and 123 deletions
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14
thirdparty/meshoptimizer/vertexcodec.cpp vendored
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@@ -710,18 +710,12 @@ static v128_t decodeShuffleMask(unsigned char mask0, unsigned char mask1)
SIMD_TARGET
static void wasmMoveMask(v128_t mask, unsigned char& mask0, unsigned char& mask1)
{
v128_t mask_0 = wasm_v32x4_shuffle(mask, mask, 0, 2, 1, 3);
uint64_t mask_1a = wasm_i64x2_extract_lane(mask_0, 0) & 0x0804020108040201ull;
uint64_t mask_1b = wasm_i64x2_extract_lane(mask_0, 1) & 0x8040201080402010ull;
// magic constant found using z3 SMT assuming mask has 8 groups of 0xff or 0x00
const uint64_t magic = 0x000103070f1f3f80ull;
// TODO: This can use v8x16_bitmask in the future
uint64_t mask_2 = mask_1a | mask_1b;
uint64_t mask_4 = mask_2 | (mask_2 >> 16);
uint64_t mask_8 = mask_4 | (mask_4 >> 8);
mask0 = uint8_t(mask_8);
mask1 = uint8_t(mask_8 >> 32);
mask0 = uint8_t((wasm_i64x2_extract_lane(mask, 0) * magic) >> 56);
mask1 = uint8_t((wasm_i64x2_extract_lane(mask, 1) * magic) >> 56);
}
SIMD_TARGET