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shader: implement RDNA2 subvector loop mask and branch semantics

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This commit is contained in:
nmzik
2026-09-09 19:04:03 +04:00
parent 3902b42096
commit c913951f7b
11 changed files with 167 additions and 1 deletions
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src/graphics/shader/recompiler/frontend/decode/ScalarAluOps.cpp
+6
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@@ -83,6 +83,7 @@ constexpr OpcodeMap SOPK_OPCODE_LIST[] = {
{0x0eu, Opcode::S_CMP_LE_U32}, {0x0fu, Opcode::S_ADD_I32}, {0x10u, Opcode::S_MULK_I32},
{0x13u, Opcode::S_SETREG_B32}, {0x17u, Opcode::S_WAITCNT}, {0x18u, Opcode::S_WAITCNT},
{0x19u, Opcode::S_WAITCNT}, {0x1au, Opcode::S_WAITCNT},
{0x1bu, Opcode::S_SUBVECTOR_LOOP_BEGIN}, {0x1cu, Opcode::S_SUBVECTOR_LOOP_END},
};
constexpr OpcodeMap SOPP_OPCODE_LIST[] = {
@@ -209,6 +210,11 @@ void DecodeSopk(uint32_t pc, std::span<const uint32_t> code, uint32_t word_index
switch (inst.opcode) {
case Opcode::S_MOVK_I32: DecodeScalarDestination(sdst, pc, inst.dst); return;
case Opcode::S_SUBVECTOR_LOOP_BEGIN:
case Opcode::S_SUBVECTOR_LOOP_END:
DecodeScalarDestination(sdst, pc, inst.dst);
inst.branch_target = pc + 4u + static_cast<uint32_t>(imm * 4);
return;
case Opcode::S_WAITCNT: {
const uint32_t waitcnt = word & 0xffffu;
inst.dst.kind = OperandKind::Null;