From c858b8ba97d3ff79dcff0795c1184ee356f2cd1a Mon Sep 17 00:00:00 2001
From: ameerj <52414509+ameerj@users.noreply.github.com>
Date: Sun, 21 Mar 2021 02:09:14 -0400
Subject: shader: Implement DMUL and DFMA

Also add a missing const on DADD
---
 .../translate/impl/double_fused_multiply_add.cpp   | 53 ++++++++++++++++++++++
 1 file changed, 53 insertions(+)
 create mode 100644 src/shader_recompiler/frontend/maxwell/translate/impl/double_fused_multiply_add.cpp

(limited to 'src/shader_recompiler/frontend/maxwell/translate/impl/double_fused_multiply_add.cpp')

diff --git a/src/shader_recompiler/frontend/maxwell/translate/impl/double_fused_multiply_add.cpp b/src/shader_recompiler/frontend/maxwell/translate/impl/double_fused_multiply_add.cpp
new file mode 100644
index 000000000..ff7321862
--- /dev/null
+++ b/src/shader_recompiler/frontend/maxwell/translate/impl/double_fused_multiply_add.cpp
@@ -0,0 +1,53 @@
+// Copyright 2021 yuzu Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#include "common/common_types.h"
+#include "shader_recompiler/exception.h"
+#include "shader_recompiler/frontend/maxwell/translate/impl/common_encoding.h"
+#include "shader_recompiler/frontend/maxwell/translate/impl/impl.h"
+
+namespace Shader::Maxwell {
+namespace {
+
+void DFMA(TranslatorVisitor& v, u64 insn, const IR::F64& src_b, const IR::F64& src_c) {
+    union {
+        u64 raw;
+        BitField<0, 8, IR::Reg> dest_reg;
+        BitField<8, 8, IR::Reg> src_a_reg;
+        BitField<50, 2, FpRounding> fp_rounding;
+        BitField<48, 1, u64> neg_b;
+        BitField<49, 1, u64> neg_c;
+    } const dfma{insn};
+
+    const IR::F64 src_a{v.D(dfma.src_a_reg)};
+    const IR::F64 op_b{v.ir.FPAbsNeg(src_b, false, dfma.neg_b != 0)};
+    const IR::F64 op_c{v.ir.FPAbsNeg(src_c, false, dfma.neg_c != 0)};
+
+    const IR::FpControl control{
+        .no_contraction{true},
+        .rounding{CastFpRounding(dfma.fp_rounding)},
+        .fmz_mode{IR::FmzMode::None},
+    };
+
+    v.D(dfma.dest_reg, v.ir.FPFma(src_a, op_b, op_c, control));
+}
+} // Anonymous namespace
+
+void TranslatorVisitor::DFMA_reg(u64 insn) {
+    DFMA(*this, insn, GetDoubleReg20(insn), GetDoubleReg39(insn));
+}
+
+void TranslatorVisitor::DFMA_cr(u64 insn) {
+    DFMA(*this, insn, GetDoubleCbuf(insn), GetDoubleReg39(insn));
+}
+
+void TranslatorVisitor::DFMA_rc(u64 insn) {
+    DFMA(*this, insn, GetDoubleReg39(insn), GetDoubleCbuf(insn));
+}
+
+void TranslatorVisitor::DFMA_imm(u64 insn) {
+    DFMA(*this, insn, GetDoubleImm20(insn), GetDoubleReg39(insn));
+}
+
+} // namespace Shader::Maxwell
-- 
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