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Merge pull request #18219 from hrydgard/get-index-bounds-autovec

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Make GetIndexBounds friendlier to autovectorization. Works on x86 at least.
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Henrik Rydgård 2023-09-29 11:31:34 +02:00 committed by GitHub
commit cf48532ef5
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GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 24 additions and 16 deletions
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40
GPU/Common/VertexDecoderCommon.cpp
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@ -108,19 +108,10 @@ void DecVtxFormat::InitializeFromID(uint32_t id) {
void GetIndexBounds(const void *inds, int count, u32 vertType, u16 *indexLowerBound, u16 *indexUpperBound) {
// Find index bounds. Could cache this in display lists.
// Also, this could be greatly sped up with SSE2/NEON, although rarely a bottleneck.
int lowerBound = 0x7FFFFFFF;
int upperBound = 0;
u32 idx = vertType & GE_VTYPE_IDX_MASK;
if (idx == GE_VTYPE_IDX_8BIT) {
const u8 *ind8 = (const u8 *)inds;
for (int i = 0; i < count; i++) {
u8 value = ind8[i];
if (value > upperBound)
upperBound = value;
if (value < lowerBound)
lowerBound = value;
}
} else if (idx == GE_VTYPE_IDX_16BIT) {
if (idx == GE_VTYPE_IDX_16BIT) {
uint16_t upperBound = 0;
uint16_t lowerBound = 0xFFFF;
const u16_le *ind16 = (const u16_le *)inds;
for (int i = 0; i < count; i++) {
u16 value = ind16[i];
@ -129,7 +120,24 @@ void GetIndexBounds(const void *inds, int count, u32 vertType, u16 *indexLowerBo
if (value < lowerBound)
lowerBound = value;
}
*indexLowerBound = lowerBound;
*indexUpperBound = upperBound;
} else if (idx == GE_VTYPE_IDX_8BIT) {
uint8_t upperBound = 0;
uint8_t lowerBound = 0xFF;
const u8 *ind8 = (const u8 *)inds;
for (int i = 0; i < count; i++) {
u8 value = ind8[i];
if (value > upperBound)
upperBound = value;
if (value < lowerBound)
lowerBound = value;
}
*indexLowerBound = lowerBound;
*indexUpperBound = upperBound;
} else if (idx == GE_VTYPE_IDX_32BIT) {
int lowerBound = 0x7FFFFFFF;
int upperBound = 0;
WARN_LOG_REPORT_ONCE(indexBounds32, G3D, "GetIndexBounds: Decoding 32-bit indexes");
const u32_le *ind32 = (const u32_le *)inds;
for (int i = 0; i < count; i++) {
@ -143,12 +151,12 @@ void GetIndexBounds(const void *inds, int count, u32 vertType, u16 *indexLowerBo
if (value < lowerBound)
lowerBound = value;
}
*indexLowerBound = (u16)lowerBound;
*indexUpperBound = (u16)upperBound;
} else {
lowerBound = 0;
upperBound = count - 1;
*indexLowerBound = 0;
*indexUpperBound = count - 1;
}
*indexLowerBound = (u16)lowerBound;
*indexUpperBound = (u16)upperBound;
}
void PrintDecodedVertex(const VertexReader &vtx) {