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cleaned up float16_4 case

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Jillian To 2025-03-20 17:41:02 -04:00
parent 3b1e68f9d7
commit bdcc5024e2
1 changed files with 4 additions and 4 deletions
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8
XenonRecomp/recompiler.cpp
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@ -2022,16 +2022,16 @@ bool Recompiler::Recompile(
// Strip sign from source
println("\t{}.u32 = ({}.u32[{}]&0x7FFFFFFF);", temp(), v(insn.operands[1]), i);
// If |source| is > 65504, clamp output to 0x7FFF, else save 8 exponent bits
println("\t{}.u8[0] = ({}.f32 != {}.f32) || ({}.f32 > 65504.0f) ? 0xFF : (({}.u32[{}]&0x7f800000)>>23);", vTemp(), temp(), temp(), temp(), v(insn.operands[1]), i);
println("\t{0}.u8[0] = ({1}.f32 != {1}.f32) || ({1}.f32 > 65504.0f) ? 0xFF : (({2}.u32[{3}]&0x7f800000)>>23);", vTemp(), temp(), v(insn.operands[1]), i);
// If 8 exponent bits were saved, it can only be 0x8E at most
// If saved, save first 10 bits of mantissa
println("\t{}.u16[1] = {}.u8[0] != 0xFF ? (({}.u32[{}]&0x7FE000)>>13) : 0x0;", vTemp(), vTemp(), v(insn.operands[1]), i);
println("\t{}.u16 = {}.u8[0] != 0xFF ? (({}.u32[{}]&0x7FE000)>>13) : 0x0;", temp(), vTemp(), v(insn.operands[1]), i);
// If saved and > 127-15, exponent is converted from 8 to 5-bit by subtracting 0x70
// If saved but not > 127-15, clamp exponent at 0, add 0x400 to mantissa and shift right by (0x71-exponent)
// If right shift is greater than 31 bits, manually clamp mantissa to 0 or else the output of the shift will be wrong
println("\t{}.u16 = {}.u8[0] != 0xFF ? ({}.u8[0] > 0x70 ? ((({}.u8[0]-0x70)<<10)+{}.u16[1]) : (0x71-{}.u8[0] > 31 ? 0x0 : ((0x400+{}.u16[1])>>(0x71-{}.u8[0])))) : 0x7FFF;", temp(), vTemp(), vTemp(), vTemp(), vTemp(), vTemp(), vTemp(), vTemp());
println("\t{0}.u16[{1}] = {2}.u8[0] != 0xFF ? ({2}.u8[0] > 0x70 ? ((({2}.u8[0]-0x70)<<10)+{3}.u16) : (0x71-{2}.u8[0] > 31 ? 0x0 : ((0x400+{3}.u16)>>(0x71-{2}.u8[0])))) : 0x7FFF;", v(insn.operands[0]), i+4, vTemp(), temp());
// Add back original sign
println("\t{}.u16[{}] = (({}.u32[{}]&0x80000000)>>16)+{}.u16;", v(insn.operands[0]), i+4, v(insn.operands[1]), i, temp());
println("\t{}.u16[{}] |= (({}.u32[{}]&0x80000000)>>16);", v(insn.operands[0]), i+4, v(insn.operands[1]), i);
}
break;