Add intptr_t abs/min/max operations for CPU & CUDA targets (#6160)

* Add intptr_t abs/min/max operations for CPU & CUDA targets

* Define intptr_t and uintptr_t with CUDACC_RTC

---------

Co-authored-by: Yong He <yonghe@outlook.com>

Author: juliusikkala

prelude/slang-cpp-scalar-intrinsics.h

@@ -765,6 +765,39 @@ SLANG_FORCE_INLINE int64_t I64_max(int64_t a, int64_t b)
     return a > b ? a : b;
 }
 
+// ----------------------------- UPTR -----------------------------------------
+
+SLANG_FORCE_INLINE uintptr_t UPTR_abs(uintptr_t f)
+{
+    return f;
+}
+
+SLANG_FORCE_INLINE uintptr_t UPTR_min(uintptr_t a, uintptr_t b)
+{
+    return a < b ? a : b;
+}
+
+SLANG_FORCE_INLINE uintptr_t UPTR_max(uintptr_t a, uintptr_t b)
+{
+    return a > b ? a : b;
+}
+
+// ----------------------------- IPTR -----------------------------------------
+
+SLANG_FORCE_INLINE intptr_t IPTR_abs(intptr_t f)
+{
+    return (f < 0) ? -f : f;
+}
+
+SLANG_FORCE_INLINE intptr_t IPTR_min(intptr_t a, intptr_t b)
+{
+    return a < b ? a : b;
+}
+
+SLANG_FORCE_INLINE intptr_t IPTR_max(intptr_t a, intptr_t b)
+{
+    return a > b ? a : b;
+}
 
 // ----------------------------- Interlocked ---------------------------------
 

prelude/slang-cuda-prelude.h

@@ -205,11 +205,13 @@ typedef signed char int8_t;
 typedef short int16_t;
 typedef int int32_t;
 typedef long long int64_t;
+typedef ptrdiff_t intptr_t;
 
 typedef unsigned char uint8_t;
 typedef unsigned short uint16_t;
 typedef unsigned int uint32_t;
 typedef unsigned long long uint64_t;
+typedef size_t uintptr_t;
 
 #endif
 
@@ -1902,6 +1904,39 @@ SLANG_FORCE_INLINE SLANG_CUDA_CALL uint32_t U64_countbits(uint64_t v)
     return __popcll(v);
 }
 
+// ----------------------------- IPTR -----------------------------------------
+
+SLANG_FORCE_INLINE SLANG_CUDA_CALL intptr_t IPTR_abs(intptr_t f)
+{
+    return (f < 0) ? -f : f;
+}
+
+SLANG_FORCE_INLINE SLANG_CUDA_CALL intptr_t IPTR_min(intptr_t a, intptr_t b)
+{
+    return a < b ? a : b;
+}
+
+SLANG_FORCE_INLINE SLANG_CUDA_CALL intptr_t IPTR_max(intptr_t a, intptr_t b)
+{
+    return a > b ? a : b;
+}
+
+// ----------------------------- UPTR -----------------------------------------
+
+SLANG_FORCE_INLINE SLANG_CUDA_CALL uintptr_t UPTR_abs(uintptr_t f)
+{
+    return f;
+}
+
+SLANG_FORCE_INLINE SLANG_CUDA_CALL uintptr_t UPTR_min(uintptr_t a, uintptr_t b)
+{
+    return a < b ? a : b;
+}
+
+SLANG_FORCE_INLINE SLANG_CUDA_CALL uintptr_t UPTR_max(uintptr_t a, uintptr_t b)
+{
+    return a > b ? a : b;
+}
 
 // ----------------------------- ResourceType -----------------------------------------
 

source/slang/slang-intrinsic-expand.cpp

@@ -704,6 +704,8 @@ const char* IntrinsicExpandContext::_emitSpecial(const char* cursor)
                 CASE(UInt16Type, U16);
                 CASE(UIntType, U32);
                 CASE(UInt64Type, U64);
+                CASE(IntPtrType, IPTR);
+                CASE(UIntPtrType, UPTR);
                 CASE(HalfType, F16);
                 CASE(FloatType, F32);
                 CASE(DoubleType, F64);