Bit extract (#5847)

* promoting bitfield extraction and insertion to become intrinsics for internal compiler use

* removing duplicate intrinsics from glsl.meta.slang

* refactor: update function signatures of bitfield extraction and insertion to use uint as the parameter type for offset and bits.

---------

Co-authored-by: Nate Morrical <natemorrical@gmail.com>
Co-authored-by: Yong He <yonghe@outlook.com>

1 files changed, 39 insertions, 0 deletions

diff --git a/source/slang/slang-emit-glsl.cpp b/source/slang/slang-emit-glsl.cpp
index f22419147..2c2447c53 100644
--- a/source/slang/slang-emit-glsl.cpp
+++ b/source/slang/slang-emit-glsl.cpp
@@ -2949,6 +2949,45 @@ void GLSLSourceEmitter::emitFuncDecorationImpl(IRDecoration* decoration)
     }
 }
 
+void GLSLSourceEmitter::emitBitfieldExtractImpl(IRInst* inst)
+{
+    m_writer->emit("bitfieldExtract(");
+
+    emitOperand(inst->getOperand(0), getInfo(EmitOp::General));
+    m_writer->emit(",");
+
+    m_writer->emit("int(");
+    emitOperand(inst->getOperand(1), getInfo(EmitOp::General));
+    m_writer->emit(")");
+    m_writer->emit(",");
+
+    m_writer->emit("int(");
+    emitOperand(inst->getOperand(2), getInfo(EmitOp::General));
+    m_writer->emit("))");
+}
+
+void GLSLSourceEmitter::emitBitfieldInsertImpl(IRInst* inst)
+{
+    m_writer->emit("bitfieldInsert(");
+
+    emitOperand(inst->getOperand(0), getInfo(EmitOp::General));
+    m_writer->emit(",");
+
+    emitOperand(inst->getOperand(1), getInfo(EmitOp::General));
+    m_writer->emit(",");
+
+    m_writer->emit("int(");
+    emitOperand(inst->getOperand(2), getInfo(EmitOp::General));
+    m_writer->emit(")");
+    m_writer->emit(",");
+
+    m_writer->emit("int(");
+    emitOperand(inst->getOperand(3), getInfo(EmitOp::General));
+    m_writer->emit(")");
+
+    m_writer->emit(")");
+}
+
 void GLSLSourceEmitter::emitSimpleTypeImpl(IRType* type)
 {
     switch (type->getOp())