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-rw-r--r--src/video_core/engines/shader_bytecode.h1
-rw-r--r--src/video_core/shader/decode/hfma2.cpp54
-rw-r--r--src/video_core/shader/glsl_decompiler.cpp9
-rw-r--r--src/video_core/shader/shader_ir.h1
4 files changed, 60 insertions, 5 deletions
diff --git a/src/video_core/engines/shader_bytecode.h b/src/video_core/engines/shader_bytecode.h
index c4987b682..9cb23f375 100644
--- a/src/video_core/engines/shader_bytecode.h
+++ b/src/video_core/engines/shader_bytecode.h
@@ -648,6 +648,7 @@ union Instruction {
BitField<37, 2, HalfPrecision> precision;
BitField<32, 1, u64> saturate;
+ BitField<31, 1, u64> negate_b;
BitField<30, 1, u64> negate_c;
BitField<35, 2, HalfType> type_c;
} rr;
diff --git a/src/video_core/shader/decode/hfma2.cpp b/src/video_core/shader/decode/hfma2.cpp
index 5ce08481e..bf7491804 100644
--- a/src/video_core/shader/decode/hfma2.cpp
+++ b/src/video_core/shader/decode/hfma2.cpp
@@ -2,6 +2,8 @@
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
+#include <tuple>
+
#include "common/assert.h"
#include "common/common_types.h"
#include "video_core/engines/shader_bytecode.h"
@@ -9,6 +11,8 @@
namespace VideoCommon::Shader {
+using Tegra::Shader::HalfPrecision;
+using Tegra::Shader::HalfType;
using Tegra::Shader::Instruction;
using Tegra::Shader::OpCode;
@@ -16,7 +20,55 @@ u32 ShaderIR::DecodeHfma2(BasicBlock& bb, u32 pc) {
const Instruction instr = {program_code[pc]};
const auto opcode = OpCode::Decode(instr);
- UNIMPLEMENTED();
+ if (opcode->get().GetId() == OpCode::Id::HFMA2_RR) {
+ UNIMPLEMENTED_IF(instr.hfma2.rr.precision != HalfPrecision::None);
+ } else {
+ UNIMPLEMENTED_IF(instr.hfma2.precision != HalfPrecision::None);
+ }
+
+ constexpr auto identity = HalfType::H0_H1;
+
+ const HalfType type_a = instr.hfma2.type_a;
+ const Node op_a = GetRegister(instr.gpr8);
+
+ bool neg_b{}, neg_c{};
+ auto [saturate, type_b, op_b, type_c,
+ op_c] = [&]() -> std::tuple<bool, HalfType, Node, HalfType, Node> {
+ switch (opcode->get().GetId()) {
+ case OpCode::Id::HFMA2_CR:
+ neg_b = instr.hfma2.negate_b;
+ neg_c = instr.hfma2.negate_c;
+ return {instr.hfma2.saturate, instr.hfma2.type_b,
+ GetConstBuffer(instr.cbuf34.index, instr.cbuf34.offset), instr.hfma2.type_reg39,
+ GetRegister(instr.gpr39)};
+ case OpCode::Id::HFMA2_RC:
+ neg_b = instr.hfma2.negate_b;
+ neg_c = instr.hfma2.negate_c;
+ return {instr.hfma2.saturate, instr.hfma2.type_reg39, GetRegister(instr.gpr39),
+ instr.hfma2.type_b, GetConstBuffer(instr.cbuf34.index, instr.cbuf34.offset)};
+ case OpCode::Id::HFMA2_RR:
+ neg_b = instr.hfma2.rr.negate_b;
+ neg_c = instr.hfma2.rr.negate_c;
+ return {instr.hfma2.rr.saturate, instr.hfma2.type_b, GetRegister(instr.gpr20),
+ instr.hfma2.rr.type_c, GetRegister(instr.gpr39)};
+ case OpCode::Id::HFMA2_IMM_R:
+ neg_c = instr.hfma2.negate_c;
+ return {instr.hfma2.saturate, identity, UnpackHalfImmediate(instr, true),
+ instr.hfma2.type_reg39, GetRegister(instr.gpr39)};
+ default:
+ return {false, identity, Immediate(0), identity, Immediate(0)};
+ }
+ }();
+ UNIMPLEMENTED_IF_MSG(saturate, "HFMA2 saturation is not implemented");
+
+ op_b = GetOperandAbsNegHalf(op_b, false, neg_b);
+ op_c = GetOperandAbsNegHalf(op_c, false, neg_c);
+
+ MetaHalfArithmetic meta{true, {type_a, type_b, type_c}};
+ Node value = Operation(OperationCode::HFma, meta, op_a, op_b, op_c);
+ value = HalfMerge(GetRegister(instr.gpr0), value, instr.hfma2.merge);
+
+ SetRegister(bb, instr.gpr0, value);
return pc;
}
diff --git a/src/video_core/shader/glsl_decompiler.cpp b/src/video_core/shader/glsl_decompiler.cpp
index abc9a556d..c364a43ce 100644
--- a/src/video_core/shader/glsl_decompiler.cpp
+++ b/src/video_core/shader/glsl_decompiler.cpp
@@ -762,9 +762,9 @@ private:
return GenerateBinaryInfix(operation, "/", type, type, type);
}
- std::string FFma(Operation operation) {
- return GenerateTernary(operation, "fma", Type::Float, Type::Float, Type::Float,
- Type::Float);
+ template <Type type>
+ std::string Fma(Operation operation) {
+ return GenerateTernary(operation, "fma", type, type, type, type);
}
template <Type type>
@@ -1231,7 +1231,7 @@ private:
&Add<Type::Float>,
&Mul<Type::Float>,
&Div<Type::Float>,
- &FFma,
+ &Fma<Type::Float>,
&Negate<Type::Float>,
&Absolute<Type::Float>,
&FClamp,
@@ -1289,6 +1289,7 @@ private:
&Add<Type::HalfFloat>,
&Mul<Type::HalfFloat>,
+ &Fma<Type::HalfFloat>,
&Absolute<Type::HalfFloat>,
&HNegate,
&HMergeF32,
diff --git a/src/video_core/shader/shader_ir.h b/src/video_core/shader/shader_ir.h
index ccdf316ac..928e3e7d5 100644
--- a/src/video_core/shader/shader_ir.h
+++ b/src/video_core/shader/shader_ir.h
@@ -110,6 +110,7 @@ enum class OperationCode {
HAdd, /// (MetaHalfArithmetic, f16vec2 a, f16vec2 b) -> f16vec2
HMul, /// (MetaHalfArithmetic, f16vec2 a, f16vec2 b) -> f16vec2
+ HFma, /// (MetaHalfArithmetic, f16vec2 a, f16vec2 b, f16vec2 c) -> f16vec2
HAbsolute, /// (f16vec2 a) -> f16vec2
HNegate, /// (f16vec2 a, bool first, bool second) -> f16vec2
HMergeF32, /// (f16vec2 src) -> float