From fa2f6e38f4d465ba6e5efe6c6bd23d8ef39b080d Mon Sep 17 00:00:00 2001
From: ameerj <52414509+ameerj@users.noreply.github.com>
Date: Tue, 16 Mar 2021 00:57:07 -0400
Subject: shader: Implement FSET and FSETP

Also fix oversight with adding SignedZeroInfNanPreserve execution mode.
---
 .../maxwell/translate/impl/common_funcs.cpp        | 48 +++++++++++++++
 .../frontend/maxwell/translate/impl/common_funcs.h |  6 ++
 .../translate/impl/floating_point_compare.cpp      | 68 ----------------------
 .../impl/floating_point_compare_and_set.cpp        | 65 +++++++++++++++++++++
 .../impl/floating_point_set_predicate.cpp          | 60 +++++++++++++++++++
 .../frontend/maxwell/translate/impl/impl.h         | 19 ++++++
 .../maxwell/translate/impl/not_implemented.cpp     | 24 --------
 7 files changed, 198 insertions(+), 92 deletions(-)
 create mode 100644 src/shader_recompiler/frontend/maxwell/translate/impl/floating_point_compare_and_set.cpp
 create mode 100644 src/shader_recompiler/frontend/maxwell/translate/impl/floating_point_set_predicate.cpp

(limited to 'src/shader_recompiler/frontend/maxwell')

diff --git a/src/shader_recompiler/frontend/maxwell/translate/impl/common_funcs.cpp b/src/shader_recompiler/frontend/maxwell/translate/impl/common_funcs.cpp
index 9d4ac2e36..af9a8f82c 100644
--- a/src/shader_recompiler/frontend/maxwell/translate/impl/common_funcs.cpp
+++ b/src/shader_recompiler/frontend/maxwell/translate/impl/common_funcs.cpp
@@ -58,4 +58,52 @@ IR::U1 PredicateOperation(IR::IREmitter& ir, const IR::U32& result, PredicateOp
     }
 }
 
+bool IsCompareOpOrdered(FPCompareOp op) {
+    switch (op) {
+    case FPCompareOp::LTU:
+    case FPCompareOp::EQU:
+    case FPCompareOp::LEU:
+    case FPCompareOp::GTU:
+    case FPCompareOp::NEU:
+    case FPCompareOp::GEU:
+        return false;
+    default:
+        return true;
+    }
+}
+
+IR::U1 FloatingPointCompare(IR::IREmitter& ir, const IR::F32& operand_1, const IR::F32& operand_2,
+                            FPCompareOp compare_op, IR::FpControl control) {
+    const bool ordered{IsCompareOpOrdered(compare_op)};
+    switch (compare_op) {
+    case FPCompareOp::F:
+        return ir.Imm1(false);
+    case FPCompareOp::LT:
+    case FPCompareOp::LTU:
+        return ir.FPLessThan(operand_1, operand_2, control, ordered);
+    case FPCompareOp::EQ:
+    case FPCompareOp::EQU:
+        return ir.FPEqual(operand_1, operand_2, control, ordered);
+    case FPCompareOp::LE:
+    case FPCompareOp::LEU:
+        return ir.FPLessThanEqual(operand_1, operand_2, control, ordered);
+    case FPCompareOp::GT:
+    case FPCompareOp::GTU:
+        return ir.FPGreaterThan(operand_1, operand_2, control, ordered);
+    case FPCompareOp::NE:
+    case FPCompareOp::NEU:
+        return ir.FPNotEqual(operand_1, operand_2, control, ordered);
+    case FPCompareOp::GE:
+    case FPCompareOp::GEU:
+        return ir.FPGreaterThanEqual(operand_1, operand_2, control, ordered);
+    case FPCompareOp::NUM:
+        return ir.FPOrdered(operand_1, operand_2);
+    case FPCompareOp::Nan:
+        return ir.FPUnordered(operand_1, operand_2);
+    case FPCompareOp::T:
+        return ir.Imm1(true);
+    default:
+        throw NotImplementedException("Invalid FP compare op {}", compare_op);
+    }
+}
 } // namespace Shader::Maxwell
diff --git a/src/shader_recompiler/frontend/maxwell/translate/impl/common_funcs.h b/src/shader_recompiler/frontend/maxwell/translate/impl/common_funcs.h
index c9ae5c500..f8add3c34 100644
--- a/src/shader_recompiler/frontend/maxwell/translate/impl/common_funcs.h
+++ b/src/shader_recompiler/frontend/maxwell/translate/impl/common_funcs.h
@@ -15,4 +15,10 @@ namespace Shader::Maxwell {
                                       const IR::U1& predicate_2, BooleanOp bop);
 
 [[nodiscard]] IR::U1 PredicateOperation(IR::IREmitter& ir, const IR::U32& result, PredicateOp op);
+
+[[nodiscard]] bool IsCompareOpOrdered(FPCompareOp op);
+
+[[nodiscard]] IR::U1 FloatingPointCompare(IR::IREmitter& ir, const IR::F32& operand_1,
+                                          const IR::F32& operand_2, FPCompareOp compare_op,
+                                          IR::FpControl control = {});
 } // namespace Shader::Maxwell
diff --git a/src/shader_recompiler/frontend/maxwell/translate/impl/floating_point_compare.cpp b/src/shader_recompiler/frontend/maxwell/translate/impl/floating_point_compare.cpp
index f254ecb3a..e78e9c4e1 100644
--- a/src/shader_recompiler/frontend/maxwell/translate/impl/floating_point_compare.cpp
+++ b/src/shader_recompiler/frontend/maxwell/translate/impl/floating_point_compare.cpp
@@ -9,74 +9,6 @@
 
 namespace Shader::Maxwell {
 namespace {
-enum class FPCompareOp : u64 {
-    F,
-    LT,
-    EQ,
-    LE,
-    GT,
-    NE,
-    GE,
-    NUM,
-    Nan,
-    LTU,
-    EQU,
-    LEU,
-    GTU,
-    NEU,
-    GEU,
-    T,
-};
-
-bool IsCompareOpOrdered(FPCompareOp op) {
-    switch (op) {
-    case FPCompareOp::LTU:
-    case FPCompareOp::EQU:
-    case FPCompareOp::LEU:
-    case FPCompareOp::GTU:
-    case FPCompareOp::NEU:
-    case FPCompareOp::GEU:
-        return false;
-    default:
-        return true;
-    }
-}
-
-IR::U1 FloatingPointCompare(IR::IREmitter& ir, const IR::F32& operand_1, const IR::F32& operand_2,
-                            FPCompareOp compare_op, IR::FpControl control) {
-    const bool ordered{IsCompareOpOrdered(compare_op)};
-    switch (compare_op) {
-    case FPCompareOp::F:
-        return ir.Imm1(false);
-    case FPCompareOp::LT:
-    case FPCompareOp::LTU:
-        return ir.FPLessThan(operand_1, operand_2, control, ordered);
-    case FPCompareOp::EQ:
-    case FPCompareOp::EQU:
-        return ir.FPEqual(operand_1, operand_2, control, ordered);
-    case FPCompareOp::LE:
-    case FPCompareOp::LEU:
-        return ir.FPLessThanEqual(operand_1, operand_2, control, ordered);
-    case FPCompareOp::GT:
-    case FPCompareOp::GTU:
-        return ir.FPGreaterThan(operand_1, operand_2, control, ordered);
-    case FPCompareOp::NE:
-    case FPCompareOp::NEU:
-        return ir.FPNotEqual(operand_1, operand_2, control, ordered);
-    case FPCompareOp::GE:
-    case FPCompareOp::GEU:
-        return ir.FPGreaterThanEqual(operand_1, operand_2, control, ordered);
-    case FPCompareOp::NUM:
-        return ir.FPOrdered(operand_1, operand_2);
-    case FPCompareOp::Nan:
-        return ir.FPUnordered(operand_1, operand_2);
-    case FPCompareOp::T:
-        return ir.Imm1(true);
-    default:
-        throw NotImplementedException("Invalid compare op {}", compare_op);
-    }
-}
-
 void FCMP(TranslatorVisitor& v, u64 insn, const IR::U32& src_a, const IR::F32& operand) {
     union {
         u64 insn;
diff --git a/src/shader_recompiler/frontend/maxwell/translate/impl/floating_point_compare_and_set.cpp b/src/shader_recompiler/frontend/maxwell/translate/impl/floating_point_compare_and_set.cpp
new file mode 100644
index 000000000..c5417775e
--- /dev/null
+++ b/src/shader_recompiler/frontend/maxwell/translate/impl/floating_point_compare_and_set.cpp
@@ -0,0 +1,65 @@
+// Copyright 2021 yuzu Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#include "common/bit_field.h"
+#include "common/common_types.h"
+#include "shader_recompiler/frontend/maxwell/translate/impl/common_funcs.h"
+#include "shader_recompiler/frontend/maxwell/translate/impl/impl.h"
+
+namespace Shader::Maxwell {
+namespace {
+void FSET(TranslatorVisitor& v, u64 insn, const IR::F32& src_b) {
+    union {
+        u64 insn;
+        BitField<0, 8, IR::Reg> dest_reg;
+        BitField<8, 8, IR::Reg> src_a_reg;
+        BitField<39, 3, IR::Pred> pred;
+        BitField<42, 1, u64> neg_pred;
+        BitField<43, 1, u64> negate_a;
+        BitField<44, 1, u64> abs_b;
+        BitField<45, 2, BooleanOp> bop;
+        BitField<48, 4, FPCompareOp> compare_op;
+        BitField<52, 1, u64> bf;
+        BitField<53, 1, u64> negate_b;
+        BitField<54, 1, u64> abs_a;
+        BitField<55, 1, u64> ftz;
+    } const fset{insn};
+
+    const IR::F32 op_a{v.ir.FPAbsNeg(v.F(fset.src_a_reg), fset.abs_a != 0, fset.negate_a != 0)};
+    const IR::F32 op_b = v.ir.FPAbsNeg(src_b, fset.abs_b != 0, fset.negate_b != 0);
+    const IR::FpControl control{
+        .no_contraction{false},
+        .rounding{IR::FpRounding::DontCare},
+        .fmz_mode{fset.ftz != 0 ? IR::FmzMode::FTZ : IR::FmzMode::None},
+    };
+
+    IR::U1 pred{v.ir.GetPred(fset.pred)};
+    if (fset.neg_pred != 0) {
+        pred = v.ir.LogicalNot(pred);
+    }
+    const IR::U1 cmp_result{FloatingPointCompare(v.ir, op_a, op_b, fset.compare_op, control)};
+    const IR::U1 bop_result{PredicateCombine(v.ir, cmp_result, pred, fset.bop)};
+
+    const IR::U32 one_mask{v.ir.Imm32(-1)};
+    const IR::U32 fp_one{v.ir.Imm32(0x3f800000)};
+    const IR::U32 fail_result{v.ir.Imm32(0)};
+    const IR::U32 pass_result{fset.bf == 0 ? one_mask : fp_one};
+
+    v.X(fset.dest_reg, IR::U32{v.ir.Select(bop_result, pass_result, fail_result)});
+}
+} // Anonymous namespace
+
+void TranslatorVisitor::FSET_reg(u64 insn) {
+    FSET(*this, insn, GetFloatReg20(insn));
+}
+
+void TranslatorVisitor::FSET_cbuf(u64 insn) {
+    FSET(*this, insn, GetFloatCbuf(insn));
+}
+
+void TranslatorVisitor::FSET_imm(u64 insn) {
+    FSET(*this, insn, GetFloatImm20(insn));
+}
+
+} // namespace Shader::Maxwell
diff --git a/src/shader_recompiler/frontend/maxwell/translate/impl/floating_point_set_predicate.cpp b/src/shader_recompiler/frontend/maxwell/translate/impl/floating_point_set_predicate.cpp
new file mode 100644
index 000000000..8ff9db843
--- /dev/null
+++ b/src/shader_recompiler/frontend/maxwell/translate/impl/floating_point_set_predicate.cpp
@@ -0,0 +1,60 @@
+// Copyright 2021 yuzu Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#include "common/bit_field.h"
+#include "common/common_types.h"
+#include "shader_recompiler/frontend/maxwell/translate/impl/common_funcs.h"
+#include "shader_recompiler/frontend/maxwell/translate/impl/impl.h"
+
+namespace Shader::Maxwell {
+namespace {
+void FSETP(TranslatorVisitor& v, u64 insn, const IR::F32& src_b) {
+    union {
+        u64 insn;
+        BitField<0, 3, IR::Pred> dest_pred_b;
+        BitField<3, 3, IR::Pred> dest_pred_a;
+        BitField<6, 1, u64> negate_b;
+        BitField<7, 1, u64> abs_a;
+        BitField<8, 8, IR::Reg> src_a_reg;
+        BitField<39, 3, IR::Pred> bop_pred;
+        BitField<42, 1, u64> neg_bop_pred;
+        BitField<43, 1, u64> negate_a;
+        BitField<44, 1, u64> abs_b;
+        BitField<45, 2, BooleanOp> bop;
+        BitField<47, 1, u64> ftz;
+        BitField<48, 4, FPCompareOp> compare_op;
+    } const fsetp{insn};
+
+    const IR::F32 op_a{v.ir.FPAbsNeg(v.F(fsetp.src_a_reg), fsetp.abs_a != 0, fsetp.negate_a != 0)};
+    const IR::F32 op_b = v.ir.FPAbsNeg(src_b, fsetp.abs_b != 0, fsetp.negate_b != 0);
+    const IR::FpControl control{
+        .no_contraction{false},
+        .rounding{IR::FpRounding::DontCare},
+        .fmz_mode{fsetp.ftz != 0 ? IR::FmzMode::FTZ : IR::FmzMode::None},
+    };
+
+    const BooleanOp bop{fsetp.bop};
+    const FPCompareOp compare_op{fsetp.compare_op};
+    const IR::U1 comparison{FloatingPointCompare(v.ir, op_a, op_b, compare_op, control)};
+    const IR::U1 bop_pred{v.ir.GetPred(fsetp.bop_pred, fsetp.neg_bop_pred != 0)};
+    const IR::U1 result_a{PredicateCombine(v.ir, comparison, bop_pred, bop)};
+    const IR::U1 result_b{PredicateCombine(v.ir, v.ir.LogicalNot(comparison), bop_pred, bop)};
+    v.ir.SetPred(fsetp.dest_pred_a, result_a);
+    v.ir.SetPred(fsetp.dest_pred_b, result_b);
+}
+} // Anonymous namespace
+
+void TranslatorVisitor::FSETP_reg(u64 insn) {
+    FSETP(*this, insn, GetFloatReg20(insn));
+}
+
+void TranslatorVisitor::FSETP_cbuf(u64 insn) {
+    FSETP(*this, insn, GetFloatCbuf(insn));
+}
+
+void TranslatorVisitor::FSETP_imm(u64 insn) {
+    FSETP(*this, insn, GetFloatImm20(insn));
+}
+
+} // namespace Shader::Maxwell
diff --git a/src/shader_recompiler/frontend/maxwell/translate/impl/impl.h b/src/shader_recompiler/frontend/maxwell/translate/impl/impl.h
index 45d6f5e06..761b64666 100644
--- a/src/shader_recompiler/frontend/maxwell/translate/impl/impl.h
+++ b/src/shader_recompiler/frontend/maxwell/translate/impl/impl.h
@@ -35,6 +35,25 @@ enum class PredicateOp : u64 {
     NonZero,
 };
 
+enum class FPCompareOp : u64 {
+    F,
+    LT,
+    EQ,
+    LE,
+    GT,
+    NE,
+    GE,
+    NUM,
+    Nan,
+    LTU,
+    EQU,
+    LEU,
+    GTU,
+    NEU,
+    GEU,
+    T,
+};
+
 class TranslatorVisitor {
 public:
     explicit TranslatorVisitor(Environment& env_, IR::Block& block) : env{env_}, ir(block) {}
diff --git a/src/shader_recompiler/frontend/maxwell/translate/impl/not_implemented.cpp b/src/shader_recompiler/frontend/maxwell/translate/impl/not_implemented.cpp
index 9aa7b836c..b31928370 100644
--- a/src/shader_recompiler/frontend/maxwell/translate/impl/not_implemented.cpp
+++ b/src/shader_recompiler/frontend/maxwell/translate/impl/not_implemented.cpp
@@ -201,30 +201,6 @@ void TranslatorVisitor::FCHK_imm(u64) {
     ThrowNotImplemented(Opcode::FCHK_imm);
 }
 
-void TranslatorVisitor::FSET_reg(u64) {
-    ThrowNotImplemented(Opcode::FSET_reg);
-}
-
-void TranslatorVisitor::FSET_cbuf(u64) {
-    ThrowNotImplemented(Opcode::FSET_cbuf);
-}
-
-void TranslatorVisitor::FSET_imm(u64) {
-    ThrowNotImplemented(Opcode::FSET_imm);
-}
-
-void TranslatorVisitor::FSETP_reg(u64) {
-    ThrowNotImplemented(Opcode::FSETP_reg);
-}
-
-void TranslatorVisitor::FSETP_cbuf(u64) {
-    ThrowNotImplemented(Opcode::FSETP_cbuf);
-}
-
-void TranslatorVisitor::FSETP_imm(u64) {
-    ThrowNotImplemented(Opcode::FSETP_imm);
-}
-
 void TranslatorVisitor::FSWZADD(u64) {
     ThrowNotImplemented(Opcode::FSWZADD);
 }
-- 
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