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authorNguyen Dac Nam <nam.kazt.91@gmail.com>2020-03-13 06:48:01 +0100
committerGitHub <noreply@github.com>2020-03-13 06:48:01 +0100
commit465ba30d08fd294a6ccc05f9257894241a5240fc (patch)
treef6946bd8f03d30c4739de63aeff02f2f3f4d8606 /src/video_core
parentMerge pull request #3483 from namkazt/patch-1 (diff)
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Diffstat (limited to 'src/video_core')
-rw-r--r--src/video_core/shader/decode/bfe.cpp52
1 files changed, 27 insertions, 25 deletions
diff --git a/src/video_core/shader/decode/bfe.cpp b/src/video_core/shader/decode/bfe.cpp
index e02bcd097..c3ef88373 100644
--- a/src/video_core/shader/decode/bfe.cpp
+++ b/src/video_core/shader/decode/bfe.cpp
@@ -17,32 +17,34 @@ u32 ShaderIR::DecodeBfe(NodeBlock& bb, u32 pc) {
const Instruction instr = {program_code[pc]};
const auto opcode = OpCode::Decode(instr);
- UNIMPLEMENTED_IF(instr.bfe.negate_b);
-
Node op_a = GetRegister(instr.gpr8);
- op_a = GetOperandAbsNegInteger(op_a, false, instr.bfe.negate_a, false);
-
- switch (opcode->get().GetId()) {
- case OpCode::Id::BFE_IMM: {
- UNIMPLEMENTED_IF_MSG(instr.generates_cc,
- "Condition codes generation in BFE is not implemented");
-
- const Node inner_shift_imm = Immediate(static_cast<u32>(instr.bfe.GetLeftShiftValue()));
- const Node outer_shift_imm =
- Immediate(static_cast<u32>(instr.bfe.GetLeftShiftValue() + instr.bfe.shift_position));
-
- const Node inner_shift =
- Operation(OperationCode::ILogicalShiftLeft, NO_PRECISE, op_a, inner_shift_imm);
- const Node outer_shift =
- Operation(OperationCode::ILogicalShiftRight, NO_PRECISE, inner_shift, outer_shift_imm);
-
- SetInternalFlagsFromInteger(bb, outer_shift, instr.generates_cc);
- SetRegister(bb, instr.gpr0, outer_shift);
- break;
- }
- default:
- UNIMPLEMENTED_MSG("Unhandled BFE instruction: {}", opcode->get().GetName());
- }
+ Node op_b = [&] {
+ switch (opcode->get().GetId()) {
+ case OpCode::Id::BFE_R:
+ return GetRegister(instr.gpr20);
+ case OpCode::Id::BFE_C:
+ return GetConstBuffer(instr.cbuf34.index, instr.cbuf34.GetOffset());
+ case OpCode::Id::BFE_IMM:
+ return Immediate(instr.alu.GetSignedImm20_20());
+ default:
+ UNREACHABLE();
+ return Immediate(0);
+ }
+ }();
+
+ UNIMPLEMENTED_IF_MSG(instr.bfe.rd_cc, "Condition codes in BFE is not implemented");
+ UNIMPLEMENTED_IF_MSG(instr.bfe.brev, "BREV in BFE is not implemented");
+
+ const bool is_signed = instr.bfe.is_signed;
+
+ const auto start_position = SignedOperation(OperationCode::IBitfieldExtract, is_signed, op_b,
+ Immediate(0), Immediate(8));
+ const auto bits = SignedOperation(OperationCode::IBitfieldExtract, is_signed, op_b,
+ Immediate(8), Immediate(8));
+
+ auto result =
+ SignedOperation(OperationCode::IBitfieldExtract, is_signed, op_a, start_position, bits);
+ SetRegister(bb, instr.gpr0, result);
return pc;
}