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shader_ir/conversion: Split int and float selector and implement F2F H1

This commit is contained in:
ReinUsesLisp 2019-08-28 16:09:33 -03:00
parent b13fbc25b8
commit e3534700d7
2 changed files with 24 additions and 19 deletions
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9
src/video_core/engines/shader_bytecode.h
View File

@ -1006,7 +1006,6 @@ union Instruction {
} iset;
union {
BitField<41, 2, u64> selector;
BitField<45, 1, u64> negate_a;
BitField<49, 1, u64> abs_a;
BitField<10, 2, Register::Size> src_size;
@ -1031,6 +1030,14 @@ union Instruction {
return static_cast<F2fRoundingOp>(rounding.Value() & rounding_mask);
}
} f2f;
union {
BitField<41, 2, u64> selector;
} int_src;
union {
BitField<41, 1, u64> selector;
} float_src;
} conversion;
union {

34
src/video_core/shader/decode/conversion.cpp
View File

@ -14,6 +14,12 @@ using Tegra::Shader::Instruction;
using Tegra::Shader::OpCode;
using Tegra::Shader::Register;
namespace {
constexpr OperationCode GetFloatSelector(u64 selector) {
return selector == 0 ? OperationCode::FCastHalf0 : OperationCode::FCastHalf1;
}
} // Anonymous namespace
u32 ShaderIR::DecodeConversion(NodeBlock& bb, u32 pc) {
const Instruction instr = {program_code[pc]};
const auto opcode = OpCode::Decode(instr);
@ -22,7 +28,7 @@ u32 ShaderIR::DecodeConversion(NodeBlock& bb, u32 pc) {
case OpCode::Id::I2I_R:
case OpCode::Id::I2I_C:
case OpCode::Id::I2I_IMM: {
UNIMPLEMENTED_IF(instr.conversion.selector.Value());
UNIMPLEMENTED_IF(instr.conversion.int_src.selector != 0);
UNIMPLEMENTED_IF(instr.conversion.dst_size != Register::Size::Word);
UNIMPLEMENTED_IF(instr.alu.saturate_d);
@ -57,7 +63,7 @@ u32 ShaderIR::DecodeConversion(NodeBlock& bb, u32 pc) {
case OpCode::Id::I2F_R:
case OpCode::Id::I2F_C:
case OpCode::Id::I2F_IMM: {
UNIMPLEMENTED_IF(instr.conversion.selector.Value());
UNIMPLEMENTED_IF(instr.conversion.int_src.selector != 0);
UNIMPLEMENTED_IF(instr.conversion.dst_size == Register::Size::Long);
UNIMPLEMENTED_IF_MSG(instr.generates_cc,
"Condition codes generation in I2F is not implemented");
@ -93,7 +99,6 @@ u32 ShaderIR::DecodeConversion(NodeBlock& bb, u32 pc) {
case OpCode::Id::F2F_R:
case OpCode::Id::F2F_C:
case OpCode::Id::F2F_IMM: {
UNIMPLEMENTED_IF(instr.conversion.selector.Value());
UNIMPLEMENTED_IF(instr.conversion.dst_size == Register::Size::Long);
UNIMPLEMENTED_IF(instr.conversion.src_size == Register::Size::Long);
UNIMPLEMENTED_IF_MSG(instr.generates_cc,
@ -114,8 +119,10 @@ u32 ShaderIR::DecodeConversion(NodeBlock& bb, u32 pc) {
}();
if (instr.conversion.src_size == Register::Size::Short) {
// TODO: figure where extract is sey in the encoding
value = Operation(OperationCode::FCastHalf0, PRECISE, value);
value = Operation(GetFloatSelector(instr.conversion.float_src.selector), NO_PRECISE,
std::move(value));
} else {
ASSERT(instr.conversion.float_src.selector == 0);
}
value = GetOperandAbsNegFloat(value, instr.conversion.abs_a, instr.conversion.negate_a);
@ -170,19 +177,10 @@ u32 ShaderIR::DecodeConversion(NodeBlock& bb, u32 pc) {
}();
if (instr.conversion.src_size == Register::Size::Short) {
const OperationCode cast = [instr] {
switch (instr.conversion.selector) {
case 0:
return OperationCode::FCastHalf0;
case 1:
return OperationCode::FCastHalf1;
default:
UNREACHABLE_MSG("Invalid selector={}",
static_cast<u32>(instr.conversion.selector));
return OperationCode::FCastHalf0;
}
}();
value = Operation(cast, NO_PRECISE, std::move(value));
value = Operation(GetFloatSelector(instr.conversion.float_src.selector), NO_PRECISE,
std::move(value));
} else {
ASSERT(instr.conversion.float_src.selector == 0);
}
value = GetOperandAbsNegFloat(value, instr.conversion.abs_a, instr.conversion.negate_a);