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authorReinUsesLisp <reinuseslisp@airmail.cc>2018-12-23 06:26:35 +0100
committerReinUsesLisp <reinuseslisp@airmail.cc>2019-01-15 21:54:52 +0100
commitdd91650aaf217196a2b1ced17df24bd74349843d (patch)
tree537f6098b72cd7fa7ccccc0c44f294faf95e96e9 /src/video_core/shader/decode/hfma2.cpp
parentglsl_decompiler: Remove HNegate inlining (diff)
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Diffstat (limited to 'src/video_core/shader/decode/hfma2.cpp')
-rw-r--r--src/video_core/shader/decode/hfma2.cpp54
1 files changed, 53 insertions, 1 deletions
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;
}