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 ++++++++++++++++++++++
 1 file changed, 48 insertions(+)

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

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
-- 
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