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feat: added more missing instructions

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Ran-j
2025-05-29 17:28:29 -03:00
parent a0314c9847
commit e3ed780196
1 changed files with 34 additions and 2 deletions
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ps2xRecomp/src/code_generator.cpp
+34 -2
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@@ -2118,12 +2118,44 @@ namespace ps2recomp
std::string CodeGenerator::translateVU_VRINIT(const Instruction &inst)
{
return fmt::format("// Unhandled VU0 VRINIT instruction: 0x{:X}", inst.function);
uint8_t fs_reg = inst.rs;
return fmt::format(
"{{ "
" uint32_t seed = *(uint32_t*)&ctx->vu0_vf[{}]; "
" "
" // PS2 uses a specific LFSR initialization pattern "
" if (seed == 0) seed = 1; " // Prevent zero seed
" "
" uint32_t r0 = seed; "
" uint32_t r1 = seed * 0x41C64E6D + 0x3039; " // PS2-like LCG constants
" uint32_t r2 = r1 * 0x41C64E6D + 0x3039; "
" uint32_t r3 = r2 * 0x41C64E6D + 0x3039; "
" "
" ctx->vu0_r = _mm_set_epi32(r3, r2, r1, r0); "
"}}",
fs_reg);
}
std::string CodeGenerator::translateVU_VRXOR(const Instruction &inst)
{
return fmt::format("// Unhandled VU0 VRXOR instruction: 0x{:X}", inst.function);
uint8_t fs_reg = inst.rs;
return fmt::format(
"{{ "
" __m128i r_current = (__m128i)ctx->vu0_r; "
" __m128i fs_data = (__m128i)ctx->vu0_vf[{}]; "
" "
" // XOR the current random value with the data from the VU vector register "
" __m128i xored = _mm_xor_si128(r_current, fs_data); "
" "
" // Apply a simple mixing function similar to PS2's LFSR "
" __m128i mixed = _mm_xor_si128(xored, _mm_slli_epi32(xored, 7)); "
" mixed = _mm_xor_si128(mixed, _mm_srli_epi32(mixed, 9)); "
" "
" ctx->vu0_r = (__m128)mixed; "
"}}",
fs_reg);
}
std::string CodeGenerator::translateQFSRV(const Instruction &inst)