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Merge pull request #517 from Subv/iscadd 

GPU: Implement the ISCADD shader instruction.
master
bunnei 2018-06-04 21:59:55 +07:00 committed by GitHub
parent e8bfff7b4b 23b1e6eded
commit 81a16c073a
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GPG Key ID: 4AEE18F83AFDEB23
2 changed files with 47 additions and 0 deletions
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23
src/video_core/engines/shader_bytecode.h
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@ -232,6 +232,22 @@ union Instruction {
}
} 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));
// Sign extend the 20-bit value.
u32 mask = 1U << (20 - 1);
return static_cast<s32>((immediate ^ mask) - mask);
}
} iscadd;
union {
BitField<48, 1, u64> negate_b;
BitField<49, 1, u64> negate_c;
@ -362,6 +378,9 @@ public:
FMUL_R,
FMUL_IMM,
FMUL32_IMM,
ISCADD_C, // Scale and Add
ISCADD_R,
ISCADD_IMM,
MUFU, // Multi-Function Operator
RRO_C, // Range Reduction Operator
RRO_R,
@ -405,6 +424,7 @@ public:
Trivial,
Arithmetic,
Logic,
ScaledAdd,
Ffma,
Flow,
Memory,
@ -528,6 +548,9 @@ private:
INST("0101110001101---", Id::FMUL_R, Type::Arithmetic, "FMUL_R"),
INST("0011100-01101---", Id::FMUL_IMM, Type::Arithmetic, "FMUL_IMM"),
INST("00011110--------", Id::FMUL32_IMM, Type::Arithmetic, "FMUL32_IMM"),
INST("0100110000011---", Id::ISCADD_C, Type::ScaledAdd, "ISCADD_C"),
INST("0101110000011---", Id::ISCADD_R, Type::ScaledAdd, "ISCADD_R"),
INST("0011100-00011---", Id::ISCADD_IMM, Type::ScaledAdd, "ISCADD_IMM"),
INST("0101000010000---", Id::MUFU, Type::Arithmetic, "MUFU"),
INST("0100110010010---", Id::RRO_C, Type::Arithmetic, "RRO_C"),
INST("0101110010010---", Id::RRO_R, Type::Arithmetic, "RRO_R"),

24
src/video_core/renderer_opengl/gl_shader_decompiler.cpp
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@ -884,6 +884,30 @@ private:
}
break;
}
case OpCode::Type::ScaledAdd: {
std::string op_a = regs.GetRegisterAsInteger(instr.gpr8);
if (instr.iscadd.negate_a)
op_a = '-' + op_a;
std::string op_b = instr.iscadd.negate_b ? "-" : "";
if (instr.is_b_imm) {
op_b += '(' + std::to_string(instr.iscadd.GetImmediate()) + ')';
} else {
if (instr.is_b_gpr) {
op_b += regs.GetRegisterAsInteger(instr.gpr20);
} else {
op_b += regs.GetUniform(instr.uniform, instr.gpr0);
}
}
std::string shift = std::to_string(instr.iscadd.shift_amount.Value());
regs.SetRegisterToInteger(instr.gpr0, true, 0,
"((" + op_a + " << " + shift + ") + " + op_b + ')', 1, 1);
break;
}
case OpCode::Type::Ffma: {
std::string op_a = regs.GetRegisterAsFloat(instr.gpr8);
std::string op_b = instr.ffma.negate_b ? "-" : "";