Added GLSL.std.450.hlsl

Author: Przemog1

include/nbl/builtin/hlsl/spirv_intrinsics/glsl.std.450.hlsl

@@ -0,0 +1,34 @@
+#ifndef _NBL_BUILTIN_HLSL_SPIRV_INTRINSICS_GLSL_STD_450_INCLUDED_
+#define _NBL_BUILTIN_HLSL_SPIRV_INTRINSICS_GLSL_STD_450_INCLUDED_
+
+#ifdef __HLSL_VERSION
+#include <nbl/builtin/hlsl/cpp_compat.hlsl>
+#include "spirv/unified1/GLSL.std.450.h"
+
+namespace nbl 
+{
+namespace hlsl
+{
+namespace spirv
+{
+
+// Find MSB and LSB restricted to 32-bit width component types https://registry.khronos.org/SPIR-V/specs/unified1/GLSL.std.450.html
+
+template<typename Integral NBL_FUNC_REQUIRES(is_integral_v<Integral> && (sizeof(scalar_type_t<Integral>) == 4))
+	[[vk::ext_instruction(GLSLstd450::GLSLstd450FindILsb, "GLSL.std.450")]]
+Integral findILsb(Integral value);
+
+template<typename Integral NBL_FUNC_REQUIRES(is_integral_v<Integral> && (sizeof(scalar_type_t<Integral>) == 4))
+	[[vk::ext_instruction(GLSLstd450::GLSLstd450FindSMsb, "GLSL.std.450")]]
+Integral findSMsb(Integral value);
+
+template<typename Integral NBL_FUNC_REQUIRES(is_integral_v<Integral> && (sizeof(scalar_type_t<Integral>) == 4))
+	[[vk::ext_instruction(GLSLstd450::GLSLstd450FindUMsb, "GLSL.std.450")]]
+Integral findUMsb(Integral value);
+
+}
+}
+}
+
+#endif
+#endif