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This change exposes the asin library function for HLSL scalar types,
excluding long long doubles. Asin is supported for all scalar, vector,
and matrix types. This patch only adds a subset of scalar type support.
Long long double support is missing in this patch because that type
doesn't exist in HLSL.
The full documentation of the HLSL asin function is available here:
https://docs.microsoft.com/en-us/windows/win32/direct3dhlsl/dx-graphics-hlsl-asin
Repository:
rG LLVM Github Monorepo
https://reviews.llvm.org/D132612
Files:
clang/lib/Headers/hlsl/hlsl_intrinsics.h
clang/test/CodeGenHLSL/builtins/asin.hlsl
Index: clang/test/CodeGenHLSL/builtins/asin.hlsl
===================================================================
--- /dev/null
+++ clang/test/CodeGenHLSL/builtins/asin.hlsl
@@ -0,0 +1,19 @@
+// RUN: %clang_cc1 -std=hlsl2021 -finclude-default-header -x hlsl -triple \
+// RUN: dxil-pc-shadermodel6.3-library %s -emit-llvm -disable-llvm-passes \
+// RUN: -o - | FileCheck %s
+
+double asin_d(double x)
+{
+ return asin(x);
+}
+
+// CHECK: define noundef double @"?asin_d@@YANN@Z"(
+// CHECK: call noundef double @asin(double noundef %0) #2
+
+float asin_f(float x)
+{
+ return asin(x);
+}
+
+// CHECK: define noundef float @"?asin_f@@YAMM@Z"(
+// CHECK: call noundef float @asinf(float noundef %0)
Index: clang/lib/Headers/hlsl/hlsl_intrinsics.h
===================================================================
--- clang/lib/Headers/hlsl/hlsl_intrinsics.h
+++ clang/lib/Headers/hlsl/hlsl_intrinsics.h
@@ -12,4 +12,9 @@
__attribute__((clang_builtin_alias(__builtin_hlsl_wave_active_count_bits)))
uint
WaveActiveCountBits(bool bBit);
+
+__attribute__((clang_builtin_alias(__builtin_asin))) double asin(double In);
+__attribute__((clang_builtin_alias(__builtin_asinf))) float asin(float In);
+
+
#endif //_HLSL_HLSL_INTRINSICS_H_
Index: clang/test/CodeGenHLSL/builtins/asin.hlsl
===================================================================
--- /dev/null
+++ clang/test/CodeGenHLSL/builtins/asin.hlsl
@@ -0,0 +1,19 @@
+// RUN: %clang_cc1 -std=hlsl2021 -finclude-default-header -x hlsl -triple \
+// RUN: dxil-pc-shadermodel6.3-library %s -emit-llvm -disable-llvm-passes \
+// RUN: -o - | FileCheck %s
+
+double asin_d(double x)
+{
+ return asin(x);
+}
+
+// CHECK: define noundef double @"?asin_d@@YANN@Z"(
+// CHECK: call noundef double @asin(double noundef %0) #2
+
+float asin_f(float x)
+{
+ return asin(x);
+}
+
+// CHECK: define noundef float @"?asin_f@@YAMM@Z"(
+// CHECK: call noundef float @asinf(float noundef %0)
Index: clang/lib/Headers/hlsl/hlsl_intrinsics.h
===================================================================
--- clang/lib/Headers/hlsl/hlsl_intrinsics.h
+++ clang/lib/Headers/hlsl/hlsl_intrinsics.h
@@ -12,4 +12,9 @@
__attribute__((clang_builtin_alias(__builtin_hlsl_wave_active_count_bits))) uint
WaveActiveCountBits(bool bBit);
+
+__attribute__((clang_builtin_alias(__builtin_asin))) double asin(double In);
+__attribute__((clang_builtin_alias(__builtin_asinf))) float asin(float In);
+
+
#endif //_HLSL_HLSL_INTRINSICS_H_
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