From 6f57e47a9e1675b011f023277b47cfc768d30da8 Mon Sep 17 00:00:00 2001
From: kaizhangNV <149626564+kaizhangNV@users.noreply.github.com>
Date: Tue, 17 Dec 2024 19:06:30 -0600
Subject: Implement bitcast for 64-bit date type (#5895)

Close #5470

* implement bitcast for 64-bit date type
* Move 'ensurePrelude' to base class to remove duplication
* Assert on 'double' type for Metal target, as Metal doesn't have 'double' support
---
 source/slang/slang-emit-glsl.cpp | 26 ++++++++++++++++++++++++++
 1 file changed, 26 insertions(+)

(limited to 'source/slang/slang-emit-glsl.cpp')

diff --git a/source/slang/slang-emit-glsl.cpp b/source/slang/slang-emit-glsl.cpp
index 2c2447c53..d6f3795e3 100644
--- a/source/slang/slang-emit-glsl.cpp
+++ b/source/slang/slang-emit-glsl.cpp
@@ -2030,6 +2030,32 @@ bool GLSLSourceEmitter::tryEmitInstExprImpl(IRInst* inst, const EmitOpInfo& inOu
                     emitType(inst->getDataType());
                 }
                 break;
+            case BaseType::Int64:
+                if (fromType == BaseType::Double)
+                {
+                    m_writer->emit("int64_t(doubleBitsToInt64(");
+                    emitOperand(inst->getOperand(0), getInfo(EmitOp::General));
+                    m_writer->emit("))");
+                    return true;
+                }
+                else
+                {
+                    emitType(inst->getDataType());
+                }
+                break;
+            case BaseType::UInt64:
+                if (fromType == BaseType::Double)
+                {
+                    m_writer->emit("uint64_t(doubleBitsToUint64(");
+                    emitOperand(inst->getOperand(0), getInfo(EmitOp::General));
+                    m_writer->emit("))");
+                    return true;
+                }
+                else
+                {
+                    emitType(inst->getDataType());
+                }
+                break;
             case BaseType::Half:
                 switch (fromType)
                 {
-- 
cgit v1.2.3