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Merge pull request #1763 from ReinUsesLisp/bfi 

gl_shader_decompiler: Implement BFI_IMM_R
This commit is contained in:
bunnei 2018-11-25 23:04:57 -05:00 committed by GitHub
parent ee764c3b4b 642dfeda2a
commit f9a211220c
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GPG Key ID: 4AEE18F83AFDEB23
2 changed files with 23 additions and 0 deletions
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3
src/video_core/engines/shader_bytecode.h
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@ -1269,6 +1269,7 @@ public:
BFE_C,
BFE_R,
BFE_IMM,
BFI_IMM_R,
BRA,
PBK,
LD_A,
@ -1410,6 +1411,7 @@ public:
ArithmeticHalf,
ArithmeticHalfImmediate,
Bfe,
Bfi,
Shift,
Ffma,
Hfma2,
@ -1628,6 +1630,7 @@ private:
INST("0100110000000---", Id::BFE_C, Type::Bfe, "BFE_C"),
INST("0101110000000---", Id::BFE_R, Type::Bfe, "BFE_R"),
INST("0011100-00000---", Id::BFE_IMM, Type::Bfe, "BFE_IMM"),
INST("0011011-11110---", Id::BFI_IMM_R, Type::Bfi, "BFI_IMM_R"),
INST("0100110001000---", Id::LOP_C, Type::ArithmeticInteger, "LOP_C"),
INST("0101110001000---", Id::LOP_R, Type::ArithmeticInteger, "LOP_R"),
INST("0011100001000---", Id::LOP_IMM, Type::ArithmeticInteger, "LOP_IMM"),

20
src/video_core/renderer_opengl/gl_shader_decompiler.cpp
View File

@ -1721,6 +1721,26 @@ private:
break;
}
case OpCode::Type::Bfi: {
UNIMPLEMENTED_IF(instr.generates_cc);
const auto [base, packed_shift] = [&]() -> std::tuple<std::string, std::string> {
switch (opcode->get().GetId()) {
case OpCode::Id::BFI_IMM_R:
return {regs.GetRegisterAsInteger(instr.gpr39, 0, false),
std::to_string(instr.alu.GetSignedImm20_20())};
default:
UNREACHABLE();
}
}();
const std::string offset = '(' + packed_shift + " & 0xff)";
const std::string bits = "((" + packed_shift + " >> 8) & 0xff)";
const std::string insert = regs.GetRegisterAsInteger(instr.gpr8, 0, false);
regs.SetRegisterToInteger(
instr.gpr0, false, 0,
"bitfieldInsert(" + base + ", " + insert + ", " + offset + ", " + bits + ')', 1, 1);
break;
}
case OpCode::Type::Shift: {
std::string op_a = regs.GetRegisterAsInteger(instr.gpr8, 0, true);
std::string op_b;