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gl_shader_decompiler: Implement SHL instruction.

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This commit is contained in:
bunnei 2018-06-04 22:15:19 -04:00
parent 00749f5ab3
commit c23c30c76f
2 changed files with 47 additions and 14 deletions
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30
src/video_core/engines/shader_bytecode.h
View file

@ -230,22 +230,19 @@ union Instruction {
std::memcpy(&result, &imm, sizeof(imm));
return result;
}
} alu;
union {
BitField<39, 5, u64> shift_amount;
BitField<20, 19, u64> immediate_low;
BitField<56, 1, u64> immediate_high;
BitField<48, 1, u64> negate_b;
BitField<49, 1, u64> negate_a;
s32 GetImmediate() const {
u32 immediate = static_cast<u32>(immediate_low | (immediate_high << 19));
s32 GetSignedImm20_20() const {
u32 immediate = static_cast<u32>(imm20_19 | (negate_imm << 19));
// Sign extend the 20-bit value.
u32 mask = 1U << (20 - 1);
return static_cast<s32>((immediate ^ mask) - mask);
}
} alu;
union {
BitField<39, 5, u64> shift_amount;
BitField<48, 1, u64> negate_b;
BitField<49, 1, u64> negate_a;
} iscadd;
union {
@ -402,6 +399,9 @@ public:
MOV_R,
MOV_IMM,
MOV32_IMM,
SHL_C,
SHL_R,
SHL_IMM,
SHR_C,
SHR_R,
SHR_IMM,
@ -424,6 +424,7 @@ public:
Trivial,
Arithmetic,
Logic,
Shift,
ScaledAdd,
Ffma,
Flow,
@ -565,13 +566,16 @@ private:
INST("0101110010011---", Id::MOV_R, Type::Arithmetic, "MOV_R"),
INST("0011100-10011---", Id::MOV_IMM, Type::Arithmetic, "MOV_IMM"),
INST("000000010000----", Id::MOV32_IMM, Type::Arithmetic, "MOV32_IMM"),
INST("0100110000101---", Id::SHR_C, Type::Arithmetic, "SHR_C"),
INST("0101110000101---", Id::SHR_R, Type::Arithmetic, "SHR_R"),
INST("0011100-00101---", Id::SHR_IMM, Type::Arithmetic, "SHR_IMM"),
INST("0100110001100---", Id::FMNMX_C, Type::Arithmetic, "FMNMX_C"),
INST("0101110001100---", Id::FMNMX_R, Type::Arithmetic, "FMNMX_R"),
INST("0011100-01100---", Id::FMNMX_IMM, Type::Arithmetic, "FMNMX_IMM"),
INST("000001----------", Id::LOP32I, Type::Logic, "LOP32I"),
INST("0100110001001---", Id::SHL_C, Type::Shift, "SHL_C"),
INST("0101110001001---", Id::SHL_R, Type::Shift, "SHL_R"),
INST("0011100-01001---", Id::SHL_IMM, Type::Shift, "SHL_IMM"),
INST("0100110000101---", Id::SHR_C, Type::Shift, "SHR_C"),
INST("0101110000101---", Id::SHR_R, Type::Shift, "SHR_R"),
INST("0011100-00101---", Id::SHR_IMM, Type::Shift, "SHR_IMM"),
INST("0100110011100---", Id::I2I_C, Type::Conversion, "I2I_C"),
INST("0101110011100---", Id::I2I_R, Type::Conversion, "I2I_R"),
INST("01110001-1000---", Id::I2I_IMM, Type::Conversion, "I2I_IMM"),

31
src/video_core/renderer_opengl/gl_shader_decompiler.cpp
View file

@ -884,6 +884,35 @@ private:
}
break;
}
case OpCode::Type::Shift: {
std::string op_a = regs.GetRegisterAsInteger(instr.gpr8, 0, false);
std::string op_b;
if (instr.is_b_imm) {
op_b += '(' + std::to_string(instr.alu.GetSignedImm20_20()) + ')';
} else {
if (instr.is_b_gpr) {
op_b += regs.GetRegisterAsInteger(instr.gpr20);
} else {
op_b += regs.GetUniform(instr.uniform, GLSLRegister::Type::Integer);
}
}
switch (opcode->GetId()) {
case OpCode::Id::SHL_C:
case OpCode::Id::SHL_R:
case OpCode::Id::SHL_IMM:
regs.SetRegisterToInteger(instr.gpr0, true, 0, op_a + " << " + op_b, 1, 1);
break;
default: {
NGLOG_CRITICAL(HW_GPU, "Unhandled shift instruction: {}", opcode->GetName());
UNREACHABLE();
}
}
break;
}
case OpCode::Type::ScaledAdd: {
std::string op_a = regs.GetRegisterAsInteger(instr.gpr8);
@ -893,7 +922,7 @@ private:
std::string op_b = instr.iscadd.negate_b ? "-" : "";
if (instr.is_b_imm) {
op_b += '(' + std::to_string(instr.iscadd.GetImmediate()) + ')';
op_b += '(' + std::to_string(instr.alu.GetSignedImm20_20()) + ')';
} else {
if (instr.is_b_gpr) {
op_b += regs.GetRegisterAsInteger(instr.gpr20);