shader: Implement ISET, add common_funcs

7 files changed, 147 insertions, 50 deletions

diff --git a/src/shader_recompiler/frontend/maxwell/translate/impl/common_funcs.cpp b/src/shader_recompiler/frontend/maxwell/translate/impl/common_funcs.cpp
new file mode 100644
index 000000000..3ec146b1a
--- /dev/null
+++ b/src/shader_recompiler/frontend/maxwell/translate/impl/common_funcs.cpp
@@ -0,0 +1,46 @@
+// Copyright 2021 yuzu Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#include "shader_recompiler/frontend/maxwell/translate/impl/common_funcs.h"
+
+namespace Shader::Maxwell {
+[[nodiscard]] IR::U1 IntegerCompare(TranslatorVisitor& v, const IR::U32& operand_1,
+                                    const IR::U32& operand_2, ComparisonOp compare_op,
+                                    bool is_signed) {
+    switch (compare_op) {
+    case ComparisonOp::False:
+        return v.ir.Imm1(false);
+    case ComparisonOp::LessThan:
+        return v.ir.ILessThan(operand_1, operand_2, is_signed);
+    case ComparisonOp::Equal:
+        return v.ir.IEqual(operand_1, operand_2);
+    case ComparisonOp::LessThanEqual:
+        return v.ir.ILessThanEqual(operand_1, operand_2, is_signed);
+    case ComparisonOp::GreaterThan:
+        return v.ir.IGreaterThan(operand_1, operand_2, is_signed);
+    case ComparisonOp::NotEqual:
+        return v.ir.INotEqual(operand_1, operand_2);
+    case ComparisonOp::GreaterThanEqual:
+        return v.ir.IGreaterThanEqual(operand_1, operand_2, is_signed);
+    case ComparisonOp::True:
+        return v.ir.Imm1(true);
+    default:
+        throw NotImplementedException("CMP");
+    }
+}
+
+[[nodiscard]] IR::U1 PredicateCombine(TranslatorVisitor& v, const IR::U1& predicate_1,
+                                      const IR::U1& predicate_2, BooleanOp bop) {
+    switch (bop) {
+    case BooleanOp::And:
+        return v.ir.LogicalAnd(predicate_1, predicate_2);
+    case BooleanOp::Or:
+        return v.ir.LogicalOr(predicate_1, predicate_2);
+    case BooleanOp::Xor:
+        return v.ir.LogicalXor(predicate_1, predicate_2);
+    default:
+        throw NotImplementedException("BOP");
+    }
+}
+} // 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
new file mode 100644
index 000000000..293fcce2e
--- /dev/null
+++ b/src/shader_recompiler/frontend/maxwell/translate/impl/common_funcs.h
@@ -0,0 +1,17 @@
+// Copyright 2021 yuzu Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include "common/common_types.h"
+#include "shader_recompiler/frontend/maxwell/translate/impl/impl.h"
+
+namespace Shader::Maxwell {
+[[nodiscard]] IR::U1 IntegerCompare(TranslatorVisitor& v, const IR::U32& operand_1,
+                                    const IR::U32& operand_2, ComparisonOp compare_op,
+                                    bool is_signed);
+
+[[nodiscard]] IR::U1 PredicateCombine(TranslatorVisitor& v, const IR::U1& predicate_1,
+                                      const IR::U1& predicate_2, BooleanOp bop);
+} // 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 672e140b2..232f8c894 100644
--- a/src/shader_recompiler/frontend/maxwell/translate/impl/impl.h
+++ b/src/shader_recompiler/frontend/maxwell/translate/impl/impl.h
@@ -2,6 +2,8 @@
 // Licensed under GPLv2 or any later version
 // Refer to the license.txt file included.
 
+#pragma once
+
 #include "shader_recompiler/environment.h"
 #include "shader_recompiler/frontend/ir/basic_block.h"
 #include "shader_recompiler/frontend/ir/ir_emitter.h"
@@ -9,6 +11,23 @@
 
 namespace Shader::Maxwell {
 
+enum class ComparisonOp : u64 {
+    False,
+    LessThan,
+    Equal,
+    LessThanEqual,
+    GreaterThan,
+    NotEqual,
+    GreaterThanEqual,
+    True,
+};
+
+enum class BooleanOp : u64 {
+    And,
+    Or,
+    Xor,
+};
+
 class TranslatorVisitor {
 public:
     explicit TranslatorVisitor(Environment& env_, IR::Block& block) : env{env_}, ir(block) {}
diff --git a/src/shader_recompiler/frontend/maxwell/translate/impl/integer_compare.cpp b/src/shader_recompiler/frontend/maxwell/translate/impl/integer_compare.cpp
index 1f604b0ee..d844974d8 100644
--- a/src/shader_recompiler/frontend/maxwell/translate/impl/integer_compare.cpp
+++ b/src/shader_recompiler/frontend/maxwell/translate/impl/integer_compare.cpp
@@ -4,46 +4,11 @@
 
 #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 {
-enum class ComparisonOp : u64 {
-    False,
-    LessThan,
-    Equal,
-    LessThanEqual,
-    GreaterThan,
-    NotEqual,
-    GreaterThanEqual,
-    True,
-};
-
-[[nodiscard]] IR::U1 CompareToZero(TranslatorVisitor& v, const IR::U32& operand,
-                                   ComparisonOp compare_op, bool is_signed) {
-    const IR::U32 zero{v.ir.Imm32(0)};
-    switch (compare_op) {
-    case ComparisonOp::False:
-        return v.ir.Imm1(false);
-    case ComparisonOp::LessThan:
-        return v.ir.ILessThan(operand, zero, is_signed);
-    case ComparisonOp::Equal:
-        return v.ir.IEqual(operand, zero);
-    case ComparisonOp::LessThanEqual:
-        return v.ir.ILessThanEqual(operand, zero, is_signed);
-    case ComparisonOp::GreaterThan:
-        return v.ir.IGreaterThan(operand, zero, is_signed);
-    case ComparisonOp::NotEqual:
-        return v.ir.INotEqual(operand, zero);
-    case ComparisonOp::GreaterThanEqual:
-        return v.ir.IGreaterThanEqual(operand, zero, is_signed);
-    case ComparisonOp::True:
-        return v.ir.Imm1(true);
-    default:
-        throw NotImplementedException("ICMP.CMP");
-    }
-}
-
 void ICMP(TranslatorVisitor& v, u64 insn, const IR::U32& src_a, const IR::U32& operand) {
     union {
         u64 insn;
@@ -55,7 +20,7 @@ void ICMP(TranslatorVisitor& v, u64 insn, const IR::U32& src_a, const IR::U32& o
 
     const IR::U32 zero{v.ir.Imm32(0)};
     const bool is_signed{icmp.is_signed != 0};
-    const IR::U1 cmp_result{CompareToZero(v, operand, icmp.compare_op, is_signed)};
+    const IR::U1 cmp_result{IntegerCompare(v, operand, zero, icmp.compare_op, is_signed)};
 
     const IR::U32 src_reg{v.X(icmp.src_reg)};
     const IR::U32 result{v.ir.Select(cmp_result, src_reg, src_a)};
diff --git a/src/shader_recompiler/frontend/maxwell/translate/impl/integer_compare_and_set.cpp b/src/shader_recompiler/frontend/maxwell/translate/impl/integer_compare_and_set.cpp
new file mode 100644
index 000000000..b6a7b593d
--- /dev/null
+++ b/src/shader_recompiler/frontend/maxwell/translate/impl/integer_compare_and_set.cpp
@@ -0,0 +1,62 @@
+// 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 ISET(TranslatorVisitor& v, u64 insn, const IR::U32& src_a) {
+    union {
+        u64 insn;
+        BitField<0, 8, IR::Reg> dest_reg;
+        BitField<8, 8, IR::Reg> src_reg;
+        BitField<39, 3, IR::Pred> pred;
+        BitField<42, 1, u64> neg_pred;
+        BitField<43, 1, u64> x;
+        BitField<44, 1, u64> bf;
+        BitField<45, 2, BooleanOp> bop;
+        BitField<48, 1, u64> is_signed;
+        BitField<49, 3, ComparisonOp> compare_op;
+    } const iset{insn};
+
+    if (iset.x != 0) {
+        throw NotImplementedException("ISET.X");
+    }
+
+    const IR::U32 src_reg{v.X(iset.src_reg)};
+    const bool is_signed{iset.is_signed != 0};
+    IR::U1 pred{v.ir.GetPred(iset.pred)};
+    if (iset.neg_pred != 0) {
+        pred = v.ir.LogicalNot(pred);
+    }
+    const IR::U1 cmp_result{IntegerCompare(v, src_reg, src_a, iset.compare_op, is_signed)};
+    const IR::U1 bop_result{PredicateCombine(v, cmp_result, pred, iset.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{iset.bf == 0 ? one_mask : fp_one};
+
+    const IR::U32 result{v.ir.Select(bop_result, pass_result, fail_result)};
+
+    v.X(iset.dest_reg, result);
+}
+} // Anonymous namespace
+
+void TranslatorVisitor::ISET_reg(u64 insn) {
+    ISET(*this, insn, GetReg20(insn));
+}
+
+void TranslatorVisitor::ISET_cbuf(u64 insn) {
+    ISET(*this, insn, GetCbuf(insn));
+}
+
+void TranslatorVisitor::ISET_imm(u64 insn) {
+    ISET(*this, insn, GetImm20(insn));
+}
+
+} // namespace Shader::Maxwell
diff --git a/src/shader_recompiler/frontend/maxwell/translate/impl/integer_minimum_maximum.cpp b/src/shader_recompiler/frontend/maxwell/translate/impl/integer_minimum_maximum.cpp
index 5303db612..40f14ab8a 100644
--- a/src/shader_recompiler/frontend/maxwell/translate/impl/integer_minimum_maximum.cpp
+++ b/src/shader_recompiler/frontend/maxwell/translate/impl/integer_minimum_maximum.cpp
@@ -23,7 +23,7 @@ void IMNMX(TranslatorVisitor& v, u64 insn, const IR::U32& op_b) {
         throw NotImplementedException("IMNMX.MODE");
     }
 
-    IR::U1 pred{v.ir.GetPred(imnmx.pred)};
+    const IR::U1 pred{v.ir.GetPred(imnmx.pred)};
     const IR::U32 op_a{v.X(imnmx.src_reg)};
     IR::U32 min;
     IR::U32 max;
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 8d4044ee8..f327e6fa5 100644
--- a/src/shader_recompiler/frontend/maxwell/translate/impl/not_implemented.cpp
+++ b/src/shader_recompiler/frontend/maxwell/translate/impl/not_implemented.cpp
@@ -457,18 +457,6 @@ void TranslatorVisitor::ISBERD(u64) {
     ThrowNotImplemented(Opcode::ISBERD);
 }
 
-void TranslatorVisitor::ISET_reg(u64) {
-    ThrowNotImplemented(Opcode::ISET_reg);
-}
-
-void TranslatorVisitor::ISET_cbuf(u64) {
-    ThrowNotImplemented(Opcode::ISET_cbuf);
-}
-
-void TranslatorVisitor::ISET_imm(u64) {
-    ThrowNotImplemented(Opcode::ISET_imm);
-}
-
 void TranslatorVisitor::JCAL(u64) {
     ThrowNotImplemented(Opcode::JCAL);
 }