spatel updated this revision to Diff 161325.
spatel added a comment.
Patch updated:
Fixed a docs typo.
https://reviews.llvm.org/D50924
Files:
docs/LanguageExtensions.rst
include/clang/Basic/Builtins.def
lib/CodeGen/CGBuiltin.cpp
test/CodeGen/builtin-rotate.c
Index: test/CodeGen/builtin-rotate.c
===================================================================
--- test/CodeGen/builtin-rotate.c
+++ test/CodeGen/builtin-rotate.c
@@ -0,0 +1,66 @@
+// RUN: %clang_cc1 %s -emit-llvm -o - | FileCheck %s
+
+unsigned char rotl8(unsigned char x, unsigned char y) {
+// CHECK-LABEL: rotl8
+// CHECK: [[F:%.*]] = call i8 @llvm.fshl.i8(i8 [[X:%.*]], i8 [[X]], i8 [[Y:%.*]])
+// CHECK-NEXT: ret i8 [[F]]
+
+ return __builtin_rotateleft8(x, y);
+}
+
+short rotl16(short x, short y) {
+// CHECK-LABEL: rotl16
+// CHECK: [[F:%.*]] = call i16 @llvm.fshl.i16(i16 [[X:%.*]], i16 [[X]], i16 [[Y:%.*]])
+// CHECK-NEXT: ret i16 [[F]]
+
+ return __builtin_rotateleft16(x, y);
+}
+
+int rotl32(int x, unsigned int y) {
+// CHECK-LABEL: rotl32
+// CHECK: [[F:%.*]] = call i32 @llvm.fshl.i32(i32 [[X:%.*]], i32 [[X]], i32 [[Y:%.*]])
+// CHECK-NEXT: ret i32 [[F]]
+
+ return __builtin_rotateleft32(x, y);
+}
+
+unsigned long long rotl64(unsigned long long x, long long y) {
+// CHECK-LABEL: rotl64
+// CHECK: [[F:%.*]] = call i64 @llvm.fshl.i64(i64 [[X:%.*]], i64 [[X]], i64 [[Y:%.*]])
+// CHECK-NEXT: ret i64 [[F]]
+
+ return __builtin_rotateleft64(x, y);
+}
+
+char rotr8(char x, char y) {
+// CHECK-LABEL: rotr8
+// CHECK: [[F:%.*]] = call i8 @llvm.fshr.i8(i8 [[X:%.*]], i8 [[X]], i8 [[Y:%.*]])
+// CHECK-NEXT: ret i8 [[F]]
+
+ return __builtin_rotateright8(x, y);
+}
+
+unsigned short rotr16(unsigned short x, unsigned short y) {
+// CHECK-LABEL: rotr16
+// CHECK: [[F:%.*]] = call i16 @llvm.fshr.i16(i16 [[X:%.*]], i16 [[X]], i16 [[Y:%.*]])
+// CHECK-NEXT: ret i16 [[F]]
+
+ return __builtin_rotateright16(x, y);
+}
+
+unsigned int rotr32(unsigned int x, int y) {
+// CHECK-LABEL: rotr32
+// CHECK: [[F:%.*]] = call i32 @llvm.fshr.i32(i32 [[X:%.*]], i32 [[X]], i32 [[Y:%.*]])
+// CHECK-NEXT: ret i32 [[F]]
+
+ return __builtin_rotateright32(x, y);
+}
+
+long long rotr64(long long x, unsigned long long y) {
+// CHECK-LABEL: rotr64
+// CHECK: [[F:%.*]] = call i64 @llvm.fshr.i64(i64 [[X:%.*]], i64 [[X]], i64 [[Y:%.*]])
+// CHECK-NEXT: ret i64 [[F]]
+
+ return __builtin_rotateright64(x, y);
+}
+
Index: lib/CodeGen/CGBuiltin.cpp
===================================================================
--- lib/CodeGen/CGBuiltin.cpp
+++ lib/CodeGen/CGBuiltin.cpp
@@ -1741,6 +1741,25 @@
case Builtin::BI__builtin_bitreverse64: {
return RValue::get(emitUnaryBuiltin(*this, E, Intrinsic::bitreverse));
}
+ case Builtin::BI__builtin_rotateleft8:
+ case Builtin::BI__builtin_rotateleft16:
+ case Builtin::BI__builtin_rotateleft32:
+ case Builtin::BI__builtin_rotateleft64: {
+ llvm::Value *Src = EmitScalarExpr(E->getArg(0));
+ llvm::Value *ShiftAmt = EmitScalarExpr(E->getArg(1));
+ Value *F = CGM.getIntrinsic(Intrinsic::fshl, Src->getType());
+ return RValue::get(Builder.CreateCall(F, { Src, Src, ShiftAmt }));
+ }
+ case Builtin::BI__builtin_rotateright8:
+ case Builtin::BI__builtin_rotateright16:
+ case Builtin::BI__builtin_rotateright32:
+ case Builtin::BI__builtin_rotateright64: {
+ llvm::Value *Src = EmitScalarExpr(E->getArg(0));
+ llvm::Value *ShiftAmt = EmitScalarExpr(E->getArg(1));
+ Value *F = CGM.getIntrinsic(Intrinsic::fshr, Src->getType());
+ return RValue::get(Builder.CreateCall(F, { Src, Src, ShiftAmt }));
+ }
+
case Builtin::BI__builtin_object_size: {
unsigned Type =
E->getArg(1)->EvaluateKnownConstInt(getContext()).getZExtValue();
Index: include/clang/Basic/Builtins.def
===================================================================
--- include/clang/Basic/Builtins.def
+++ include/clang/Basic/Builtins.def
@@ -428,6 +428,15 @@
BUILTIN(__builtin_bitreverse32, "UiUi", "nc")
BUILTIN(__builtin_bitreverse64, "ULLiULLi", "nc")
+BUILTIN(__builtin_rotateleft8, "UcUcUc", "nc")
+BUILTIN(__builtin_rotateleft16, "UsUsUs", "nc")
+BUILTIN(__builtin_rotateleft32, "UiUiUi", "nc")
+BUILTIN(__builtin_rotateleft64, "ULLiULLiULLi", "nc")
+BUILTIN(__builtin_rotateright8, "UcUcUc", "nc")
+BUILTIN(__builtin_rotateright16, "UsUsUs", "nc")
+BUILTIN(__builtin_rotateright32, "UiUiUi", "nc")
+BUILTIN(__builtin_rotateright64, "ULLiULLiULLi", "nc")
+
// Random GCC builtins
BUILTIN(__builtin_constant_p, "i.", "nctu")
BUILTIN(__builtin_classify_type, "i.", "nctu")
Index: docs/LanguageExtensions.rst
===================================================================
--- docs/LanguageExtensions.rst
+++ docs/LanguageExtensions.rst
@@ -1739,6 +1739,70 @@
the bitpattern of an integer value; for example ``0b10110110`` becomes
``0b01101101``.
+``__builtin_rotateleft``
+------------------------
+
+* ``__builtin_rotateleft8``
+* ``__builtin_rotateleft16``
+* ``__builtin_rotateleft32``
+* ``__builtin_rotateleft64``
+
+**Syntax**:
+
+.. code-block:: c++
+
+ __builtin_rotateleft32(x, y)
+
+**Examples**:
+
+.. code-block:: c++
+
+ uint8_t rot_x = __builtin_rotateleft8(x, y);
+ uint16_t rot_x = __builtin_rotateleft16(x, y);
+ uint32_t rot_x = __builtin_rotateleft32(x, y);
+ uint64_t rot_x = __builtin_rotateleft64(x, y);
+
+**Description**:
+
+The '``__builtin_rotateleft``' family of builtins is used to rotate
+the bits in the first argument by the amount in the second argument.
+For example, ``0b10000110`` rotated left by 11 becomes ``0b00110100``.
+The shift value is treated as an unsigned amount modulo the size of
+the arguments. Both arguments and the result have the bitwidth specified
+by the name of the builtin.
+
+``__builtin_rotateright``
+------------------------
+
+* ``__builtin_rotateright8``
+* ``__builtin_rotateright16``
+* ``__builtin_rotateright32``
+* ``__builtin_rotateright64``
+
+**Syntax**:
+
+.. code-block:: c++
+
+ __builtin_rotateright32(x, y)
+
+**Examples**:
+
+.. code-block:: c++
+
+ uint8_t rot_x = __builtin_rotateright8(x, y);
+ uint16_t rot_x = __builtin_rotateright16(x, y);
+ uint32_t rot_x = __builtin_rotateright32(x, y);
+ uint64_t rot_x = __builtin_rotateright64(x, y);
+
+**Description**:
+
+The '``__builtin_rotateright``' family of builtins is used to rotate
+the bits in the first argument by the amount in the second argument.
+For example, ``0b10000110`` rotated right by 3 becomes ``0b11010000``.
+The shift value is treated as an unsigned amount modulo the size of
+the arguments. Both arguments and the result have the bitwidth specified
+by the name of the builtin.
+
``__builtin_unreachable``
-------------------------
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