[HLSL] Implementation of tan intrinsic

clang/docs/LanguageExtensions.rst

@@ -665,6 +665,7 @@ Unless specified otherwise operation(±0) = ±0 and operation(±infinity) = ±in
  T __builtin_elementwise_exp2(T x)           returns the base-2 exponential, 2^x, of the specified value      floating point types
 
  T __builtin_elementwise_sqrt(T x)           return the square root of a floating-point number                floating point types
+ T __builtin_elementwise_tan(T x)            return the tangent of x interpreted as an angle in radians       floating point types
  T __builtin_elementwise_roundeven(T x)      round x to the nearest integer value in floating point format,   floating point types
                                              rounding halfway cases to even (that is, to the nearest value
                                              that is an even integer), regardless of the current rounding

clang/include/clang/Basic/Builtins.td

@@ -1284,6 +1284,12 @@ def ElementwiseSqrt : Builtin {
   let Prototype = "void(...)";
 }
 
+def ElementwiseTan : Builtin {
+  let Spellings = ["__builtin_elementwise_tan"];
+  let Attributes = [NoThrow, Const, CustomTypeChecking];
+  let Prototype = "void(...)";
+}
+
 def ElementwiseTrunc : Builtin {
   let Spellings = ["__builtin_elementwise_trunc"];
   let Attributes = [NoThrow, Const, CustomTypeChecking];

clang/lib/CodeGen/CGBuiltin.cpp

@@ -3682,7 +3682,9 @@ RValue CodeGenFunction::EmitBuiltinExpr(const GlobalDecl GD, unsigned BuiltinID,
   case Builtin::BI__builtin_elementwise_sin:
     return RValue::get(
         emitUnaryBuiltin(*this, E, llvm::Intrinsic::sin, "elt.sin"));
-
+  case Builtin::BI__builtin_elementwise_tan:
+    return RValue::get(
+        emitUnaryBuiltin(*this, E, llvm::Intrinsic::tan, "elt.tan"));
   case Builtin::BI__builtin_elementwise_trunc:
     return RValue::get(
         emitUnaryBuiltin(*this, E, llvm::Intrinsic::trunc, "elt.trunc"));

clang/lib/Headers/hlsl/hlsl_intrinsics.h

@@ -581,6 +581,38 @@ float sqrt(float In);
 _HLSL_BUILTIN_ALIAS(__builtin_sqrt)
 double sqrt(double In);
 
+//===----------------------------------------------------------------------===//
+// tan builtins
+//===----------------------------------------------------------------------===//
+#ifdef __HLSL_ENABLE_16_BIT
+_HLSL_BUILTIN_ALIAS(__builtin_elementwise_tan)
+half tan(half);
+_HLSL_BUILTIN_ALIAS(__builtin_elementwise_tan)
+half2 tan(half2);
+_HLSL_BUILTIN_ALIAS(__builtin_elementwise_tan)
+half3 tan(half3);
+_HLSL_BUILTIN_ALIAS(__builtin_elementwise_tan)
+half4 tan(half4);
+#endif
+
+_HLSL_BUILTIN_ALIAS(__builtin_elementwise_tan)
+float tan(float);
+_HLSL_BUILTIN_ALIAS(__builtin_elementwise_tan)
+float2 tan(float2);
+_HLSL_BUILTIN_ALIAS(__builtin_elementwise_tan)
+float3 tan(float3);
+_HLSL_BUILTIN_ALIAS(__builtin_elementwise_tan)
+float4 tan(float4);
+
+_HLSL_BUILTIN_ALIAS(__builtin_elementwise_tan)
+double tan(double);
+_HLSL_BUILTIN_ALIAS(__builtin_elementwise_tan)
+double2 tan(double2);
+_HLSL_BUILTIN_ALIAS(__builtin_elementwise_tan)
+double3 tan(double3);
+_HLSL_BUILTIN_ALIAS(__builtin_elementwise_tan)
+double4 tan(double4);
+
 //===----------------------------------------------------------------------===//
 // trunc builtins
 //===----------------------------------------------------------------------===//

clang/lib/Sema/SemaChecking.cpp

@@ -2782,6 +2782,7 @@ Sema::CheckBuiltinFunctionCall(FunctionDecl *FDecl, unsigned BuiltinID,
   case Builtin::BI__builtin_elementwise_nearbyint:
   case Builtin::BI__builtin_elementwise_sin:
   case Builtin::BI__builtin_elementwise_sqrt:
+  case Builtin::BI__builtin_elementwise_tan:
   case Builtin::BI__builtin_elementwise_trunc:
   case Builtin::BI__builtin_elementwise_canonicalize: {
     if (PrepareBuiltinElementwiseMathOneArgCall(TheCall))

clang/test/CodeGen/builtins-elementwise-math.c

@@ -604,6 +604,22 @@ void test_builtin_elementwise_sqrt(float f1, float f2, double d1, double d2,
   vf2 = __builtin_elementwise_sqrt(vf1);
 }
 
+void test_builtin_elementwise_tan(float f1, float f2, double d1, double d2,
+                                  float4 vf1, float4 vf2) {
+  // CHECK-LABEL: define void @test_builtin_elementwise_tan(
+  // CHECK:      [[F1:%.+]] = load float, ptr %f1.addr, align 4
+  // CHECK-NEXT:  call float @llvm.tan.f32(float [[F1]])
+  f2 = __builtin_elementwise_tan(f1);
+
+  // CHECK:      [[D1:%.+]] = load double, ptr %d1.addr, align 8
+  // CHECK-NEXT: call double @llvm.tan.f64(double [[D1]])
+  d2 = __builtin_elementwise_tan(d1);
+
+  // CHECK:      [[VF1:%.+]] = load <4 x float>, ptr %vf1.addr, align 16
+  // CHECK-NEXT: call <4 x float> @llvm.tan.v4f32(<4 x float> [[VF1]])
+  vf2 = __builtin_elementwise_tan(vf1);
+}
+
 void test_builtin_elementwise_trunc(float f1, float f2, double d1, double d2,
                                     float4 vf1, float4 vf2) {
   // CHECK-LABEL: define void @test_builtin_elementwise_trunc(

clang/test/CodeGen/strictfp-elementwise-bulitins.cpp

@@ -187,6 +187,16 @@ float4 strict_elementwise_sqrt(float4 a) {
   return __builtin_elementwise_sqrt(a);
 }
 
+// CHECK-LABEL: define dso_local noundef <4 x float> @_Z22strict_elementwise_tanDv4_f
+// CHECK-SAME: (<4 x float> noundef [[A:%.*]]) local_unnamed_addr #[[ATTR2]] {
+// CHECK-NEXT:  entry:
+// CHECK-NEXT:    [[ELT_TAN:%.*]] = tail call <4 x float> @llvm.tan.v4f32(<4 x float> [[A]]) #[[ATTR4]]
+// CHECK-NEXT:    ret <4 x float> [[ELT_TAN]]
+//
+float4 strict_elementwise_tan(float4 a) {
+  return __builtin_elementwise_tan(a);
+}
+
 // CHECK-LABEL: define dso_local noundef <4 x float> @_Z24strict_elementwise_truncDv4_f
 // CHECK-SAME: (<4 x float> noundef [[A:%.*]]) local_unnamed_addr #[[ATTR2]] {
 // CHECK-NEXT:  entry:

clang/test/CodeGenHLSL/builtins/tan.hlsl

@@ -0,0 +1,56 @@
+// RUN: %clang_cc1 -std=hlsl2021 -finclude-default-header -x hlsl -triple \
+// RUN:   dxil-pc-shadermodel6.3-library %s -fnative-half-type \
+// RUN:   -emit-llvm -disable-llvm-passes -O3 -o - | FileCheck %s
+// RUN: %clang_cc1 -std=hlsl2021 -finclude-default-header -x hlsl -triple \
+// RUN:   dxil-pc-shadermodel6.3-library %s -emit-llvm -disable-llvm-passes \
+// RUN:   -D__HLSL_ENABLE_16_BIT -o - | FileCheck %s --check-prefix=NO_HALF
+
+// CHECK: define noundef half @
+// CHECK: call half @llvm.tan.f16(
+// NO_HALF: define noundef float @"?test_tan_half@@YA$halff@$halff@@Z"(
+// NO_HALF: call float @llvm.tan.f32(
+half test_tan_half ( half p0 ) {
+  return tan ( p0 );
+}
+// CHECK: define noundef <2 x half> @
+// CHECK: call <2 x half> @llvm.tan.v2f16
+// NO_HALF: define noundef <2 x float> @"?test_tan_float2@@YAT?$__vector@M$01@__clang@@T12@@Z"(
+// NO_HALF: call <2 x float> @llvm.tan.v2f32(
+half2 test_tan_half2 ( half2 p0 ) {
+  return tan ( p0 );
+}
+// CHECK: define noundef <3 x half> @
+// CHECK: call <3 x half> @llvm.tan.v3f16
+// NO_HALF: define noundef <3 x float> @"?test_tan_float3@@YAT?$__vector@M$02@__clang@@T12@@Z"(
+// NO_HALF: call <3 x float> @llvm.tan.v3f32(
+half3 test_tan_half3 ( half3 p0 ) {
+  return tan ( p0 );
+}
+// CHECK: define noundef <4 x half> @
+// CHECK: call <4 x half> @llvm.tan.v4f16
+// NO_HALF: define noundef <4 x float> @"?test_tan_float4@@YAT?$__vector@M$03@__clang@@T12@@Z"(
+// NO_HALF: call <4 x float> @llvm.tan.v4f32(
+half4 test_tan_half4 ( half4 p0 ) {
+  return tan ( p0 );
+}
+
+// CHECK: define noundef float @
+// CHECK: call float @llvm.tan.f32(
+float test_tan_float ( float p0 ) {
+  return tan ( p0 );
+}
+// CHECK: define noundef <2 x float> @
+// CHECK: call <2 x float> @llvm.tan.v2f32
+float2 test_tan_float2 ( float2 p0 ) {
+  return tan ( p0 );
+}
+// CHECK: define noundef <3 x float> @
+// CHECK: call <3 x float> @llvm.tan.v3f32
+float3 test_tan_float3 ( float3 p0 ) {
+  return tan ( p0 );
+}
+// CHECK: define noundef <4 x float> @
+// CHECK: call <4 x float> @llvm.tan.v4f32
+float4 test_tan_float4 ( float4 p0 ) {
+  return tan ( p0 );
+}

clang/test/Sema/aarch64-sve-vector-trig-ops.c

@@ -16,3 +16,9 @@ svfloat32_t test_cos_vv_i8mf8(svfloat32_t v) {
   return __builtin_elementwise_cos(v);
   // expected-error@-1 {{1st argument must be a vector, integer or floating point type}}
 }
+
+svfloat32_t test_tan_vv_i8mf8(svfloat32_t v) {
+
+  return __builtin_elementwise_tan(v);
+  // expected-error@-1 {{1st argument must be a vector, integer or floating point type}}
+}

clang/test/Sema/builtins-elementwise-math.c

@@ -622,6 +622,27 @@ void test_builtin_elementwise_sqrt(int i, float f, double d, float4 v, int3 iv,
   // expected-error@-1 {{1st argument must be a floating point type (was 'unsigned4' (vector of 4 'unsigned int' values))}}
 }
 
+void test_builtin_elementwise_tan(int i, float f, double d, float4 v, int3 iv, unsigned u, unsigned4 uv) {
+
+  struct Foo s = __builtin_elementwise_tan(f);
+  // expected-error@-1 {{initializing 'struct Foo' with an expression of incompatible type 'float'}}
+
+  i = __builtin_elementwise_tan();
+  // expected-error@-1 {{too few arguments to function call, expected 1, have 0}}
+
+  i = __builtin_elementwise_tan(i);
+  // expected-error@-1 {{1st argument must be a floating point type (was 'int')}}
+
+  i = __builtin_elementwise_tan(f, f);
+  // expected-error@-1 {{too many arguments to function call, expected 1, have 2}}
+
+  u = __builtin_elementwise_tan(u);
+  // expected-error@-1 {{1st argument must be a floating point type (was 'unsigned int')}}
+
+  uv = __builtin_elementwise_tan(uv);
+  // expected-error@-1 {{1st argument must be a floating point type (was 'unsigned4' (vector of 4 'unsigned int' values))}}
+}
+
 void test_builtin_elementwise_trunc(int i, float f, double d, float4 v, int3 iv, unsigned u, unsigned4 uv) {
 
   struct Foo s = __builtin_elementwise_trunc(f);

clang/test/Sema/riscv-rvv-vector-trig-ops.c

@@ -17,3 +17,9 @@ vfloat32mf2_t test_cos_vv_i8mf8(vfloat32mf2_t v) {
   return __builtin_elementwise_cos(v);
   // expected-error@-1 {{1st argument must be a vector, integer or floating point type}}
 }
+
+vfloat32mf2_t test_tan_vv_i8mf8(vfloat32mf2_t v) {
+
+  return __builtin_elementwise_tan(v);
+  // expected-error@-1 {{1st argument must be a vector, integer or floating point type}}
+}

clang/test/SemaCXX/builtins-elementwise-math.cpp

@@ -118,6 +118,13 @@ void test_builtin_elementwise_sqrt() {
   static_assert(!is_const<decltype(__builtin_elementwise_sqrt(b))>::value);
 }
 
+void test_builtin_elementwise_tan() {
+  const float a = 42.0;
+  float b = 42.3;
+  static_assert(!is_const<decltype(__builtin_elementwise_tan(a))>::value);
+  static_assert(!is_const<decltype(__builtin_elementwise_tan(b))>::value);
+}
+
 void test_builtin_elementwise_log() {
   const float a = 42.0;
   float b = 42.3;

llvm/include/llvm/IR/Intrinsics.td

@@ -1010,6 +1010,7 @@ let IntrProperties = [IntrNoMem, IntrSpeculatable, IntrWillReturn] in {
   def int_powi : DefaultAttrsIntrinsic<[llvm_anyfloat_ty], [LLVMMatchType<0>, llvm_anyint_ty]>;
   def int_sin  : DefaultAttrsIntrinsic<[llvm_anyfloat_ty], [LLVMMatchType<0>]>;
   def int_cos  : DefaultAttrsIntrinsic<[llvm_anyfloat_ty], [LLVMMatchType<0>]>;
+  def int_tan  : DefaultAttrsIntrinsic<[llvm_anyfloat_ty], [LLVMMatchType<0>]>;
   def int_pow  : DefaultAttrsIntrinsic<[llvm_anyfloat_ty],
                            [LLVMMatchType<0>, LLVMMatchType<0>]>;
   def int_log  : DefaultAttrsIntrinsic<[llvm_anyfloat_ty], [LLVMMatchType<0>]>;