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[shader_recompiler] Rewrite ISBERD (#2541)

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I tried to simplify ISBERD a little bit, and remove unneeded data shifting, and unneeded complexity through helper functions I previously added.

Reviewed-on: #2541
Reviewed-by: MaranBr <maranbr@eden-emu.dev>
Reviewed-by: crueter <crueter@eden-emu.dev>
Co-authored-by: SDK Chan <sdkchan@eden-emu.dev>
Co-committed-by: SDK Chan <sdkchan@eden-emu.dev>
This commit is contained in:
SDK Chan 2025-09-22 17:55:41 +02:00 • committed by crueter
parent f33a771d58
commit 49f29e5071
Signed by: crueter
GPG key ID: 425ACD2D4830EBC6
3 changed files with 94 additions and 100 deletions
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36
src/shader_recompiler/frontend/maxwell/translate/impl/impl.cpp
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@ -271,40 +271,4 @@ void TranslatorVisitor::ResetOFlag() {
SetOFlag(ir.Imm1(false));
}
IR::U32 TranslatorVisitor::apply_ISBERD_shift(IR::U32 result, Isberd::Shift shift_value) {
if (shift_value != Isberd::Shift::Default) {
return ir.ShiftLeftLogical(result, ir.Imm32(1));
}
return result;
}
IR::U32 TranslatorVisitor::apply_ISBERD_size_read(IR::U32 address, Isberd::SZ sz) {
switch (sz) {
case Isberd::SZ::U8:
return ir.LoadGlobalU8(ir.UConvert(64, address));
case Isberd::SZ::U16:
return ir.LoadGlobalU16(ir.UConvert(64, address));
case Isberd::SZ::U32:
case Isberd::SZ::F32:
return ir.LoadGlobal32(ir.UConvert(64, address));
default:
UNREACHABLE();
}
}
IR::U32 TranslatorVisitor::compute_ISBERD_address(IR::Reg src_reg, u32 src_reg_num, u32 imm, u64 skew_value) {
IR::U32 address{};
if (src_reg_num == 0xFF) {
address = ir.Imm32(imm);
} else {
auto offset = ir.Imm32(imm);
address = ir.IAdd(X(src_reg), offset);
if (skew_value != 0) {
address = ir.IAdd(address, ir.LaneId());
}
}
return address;
};
} // namespace Shader::Maxwell