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shader: Add support for "negative" and unaligned offsets

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"Negative" offsets don't exist. They are shown as such due to a bug in
nvdisasm.

Unaligned offsets have been proved to read the aligned offset. For
example, when reading an U32, if the offset is 6, the offset read will
be 4.
This commit is contained in:
ReinUsesLisp 2021-05-30 23:08:17 -03:00 • committed by ameerj
parent 5d170de0b5
commit 05d41fa9b7
3 changed files with 13 additions and 8 deletions
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4
src/shader_recompiler/frontend/maxwell/translate/impl/impl.cpp
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@ -122,14 +122,14 @@ IR::F64 TranslatorVisitor::GetDoubleReg39(u64 insn) {
static std::pair<IR::U32, IR::U32> CbufAddr(u64 insn) {
union {
u64 raw;
BitField<20, 14, s64> offset;
BitField<20, 14, u64> offset;
BitField<34, 5, u64> binding;
} const cbuf{insn};
if (cbuf.binding >= 18) {
throw NotImplementedException("Out of bounds constant buffer binding {}", cbuf.binding);
}
if (cbuf.offset >= 0x10'000 || cbuf.offset < 0) {
if (cbuf.offset >= 0x10'000) {
throw NotImplementedException("Out of bounds constant buffer offset {}", cbuf.offset);
}
const IR::Value binding{static_cast<u32>(cbuf.binding)};