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RSX: Use checksum with rotated inputs for shader hashing instead of FNV

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- Raises FPS from ~180 to ~200 in Ninja Gaiden
This commit is contained in:
Malcolm Jestadt 2025-02-14 15:26:16 -05:00 • committed by Elad
parent 7e10aa57c4
commit d891b83e4b
1 changed files with 21 additions and 19 deletions
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40
rpcs3/Emu/RSX/Program/ProgramStateCache.cpp
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@ -26,25 +26,26 @@ using namespace program_hash_util;
usz vertex_program_utils::get_vertex_program_ucode_hash(const RSXVertexProgram &program)
{
// 64-bit Fowler/Noll/Vo FNV-1a hash code
usz hash = 0xCBF29CE484222325ULL;
// Checksum as hash with rotated data
const void* instbuffer = program.data.data();
usz instIndex = 0;
u32 instIndex = 0;
usz acc0 = 0;
usz acc1 = 0;
for (unsigned i = 0; i < program.data.size() / 4; i++)
do
{
if (program.instruction_mask[i])
if (program.instruction_mask[instIndex])
{
const auto inst = v128::loadu(instbuffer, instIndex);
hash ^= inst._u64[0];
hash += (hash << 1) + (hash << 4) + (hash << 5) + (hash << 7) + (hash << 8) + (hash << 40);
hash ^= inst._u64[1];
hash += (hash << 1) + (hash << 4) + (hash << 5) + (hash << 7) + (hash << 8) + (hash << 40);
usz tmp0 = std::rotr(inst._u64[0], instIndex * 2);
acc0 += tmp0;
usz tmp1 = std::rotr(inst._u64[1], (instIndex * 2) + 1);
acc1 += tmp1;
}
instIndex++;
}
return hash;
} while (instIndex < (program.data.size() / 4));
return acc0 + acc1;
}
vertex_program_utils::vertex_program_metadata vertex_program_utils::analyse_vertex_program(const u32* data, u32 entry, RSXVertexProgram& dst_prog)
@ -516,17 +517,18 @@ fragment_program_utils::fragment_program_metadata fragment_program_utils::analys
usz fragment_program_utils::get_fragment_program_ucode_hash(const RSXFragmentProgram& program)
{
// 64-bit Fowler/Noll/Vo FNV-1a hash code
usz hash = 0xCBF29CE484222325ULL;
// Checksum as hash with rotated data
const void* instbuffer = program.get_data();
usz instIndex = 0;
u32 instIndex = 0;
usz acc0 = 0;
usz acc1 = 0;
while (true)
{
const auto inst = v128::loadu(instbuffer, instIndex);
hash ^= inst._u64[0];
hash += (hash << 1) + (hash << 4) + (hash << 5) + (hash << 7) + (hash << 8) + (hash << 40);
hash ^= inst._u64[1];
hash += (hash << 1) + (hash << 4) + (hash << 5) + (hash << 7) + (hash << 8) + (hash << 40);
usz tmp0 = std::rotr(inst._u64[0], instIndex * 2);
acc0 += tmp0;
usz tmp1 = std::rotr(inst._u64[1], (instIndex * 2) + 1);
acc1 += tmp1;
instIndex++;
// Skip constants
if (fragment_program_utils::is_constant(inst._u32[1]) ||
@ -536,7 +538,7 @@ usz fragment_program_utils::get_fragment_program_ucode_hash(const RSXFragmentPro
bool end = (inst._u32[0] >> 8) & 0x1;
if (end)
return hash;
return acc0 + acc1;
}
return 0;
}