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dbcfbffc <https://reviews.llvm.org/rGdbcfbffc7ae46cc7b84257787681676144a1bd5f>
adds `ppc.readflm` and `ppc.setflm` intrinsics to read or write FPSCR register.
This patch adds them to Clang.
Repository:
rG LLVM Github Monorepo
https://reviews.llvm.org/D85874
Files:
clang/include/clang/Basic/BuiltinsPPC.def
clang/test/CodeGen/builtins-ppc.c
llvm/include/llvm/IR/IntrinsicsPowerPC.td
Index: llvm/include/llvm/IR/IntrinsicsPowerPC.td
===================================================================
--- llvm/include/llvm/IR/IntrinsicsPowerPC.td
+++ llvm/include/llvm/IR/IntrinsicsPowerPC.td
@@ -48,9 +48,11 @@
def int_ppc_eieio : Intrinsic<[],[],[]>;
// Get content from current FPSCR register
- def int_ppc_readflm : Intrinsic<[llvm_double_ty], [], [IntrNoMem]>;
+ def int_ppc_readflm : GCCBuiltin<"__builtin_readflm">,
+ Intrinsic<[llvm_double_ty], [], [IntrNoMem]>;
// Set FPSCR register, and return previous content
- def int_ppc_setflm : Intrinsic<[llvm_double_ty], [llvm_double_ty], []>;
+ def int_ppc_setflm : GCCBuiltin<"__builtin_setflm">,
+ Intrinsic<[llvm_double_ty], [llvm_double_ty], []>;
// Intrinsics for [double]word extended forms of divide instructions
def int_ppc_divwe : GCCBuiltin<"__builtin_divwe">,
Index: clang/test/CodeGen/builtins-ppc.c
===================================================================
--- clang/test/CodeGen/builtins-ppc.c
+++ clang/test/CodeGen/builtins-ppc.c
@@ -27,3 +27,12 @@
// CHECK: call double @llvm.ppc.setrnd(i32 %2)
res = __builtin_setrnd(x);
}
+
+void test_builtin_ppc_flm() {
+ volatile double res;
+ // CHECK: call double @llvm.ppc.readflm()
+ res = __builtin_readflm();
+
+ // CHECK: call double @llvm.ppc.setflm(double %1)
+ res = __builtin_setflm(res);
+}
Index: clang/include/clang/Basic/BuiltinsPPC.def
===================================================================
--- clang/include/clang/Basic/BuiltinsPPC.def
+++ clang/include/clang/Basic/BuiltinsPPC.def
@@ -549,6 +549,12 @@
// Set the floating point rounding mode
BUILTIN(__builtin_setrnd, "di", "")
+// Get content from current FPSCR
+BUILTIN(__builtin_readflm, "d", "")
+
+// Set content of FPSCR, and return its content before update
+BUILTIN(__builtin_setflm, "dd", "")
+
// Cache built-ins
BUILTIN(__builtin_dcbf, "vvC*", "")
Index: llvm/include/llvm/IR/IntrinsicsPowerPC.td
===================================================================
--- llvm/include/llvm/IR/IntrinsicsPowerPC.td
+++ llvm/include/llvm/IR/IntrinsicsPowerPC.td
@@ -48,9 +48,11 @@
def int_ppc_eieio : Intrinsic<[],[],[]>;
// Get content from current FPSCR register
- def int_ppc_readflm : Intrinsic<[llvm_double_ty], [], [IntrNoMem]>;
+ def int_ppc_readflm : GCCBuiltin<"__builtin_readflm">,
+ Intrinsic<[llvm_double_ty], [], [IntrNoMem]>;
// Set FPSCR register, and return previous content
- def int_ppc_setflm : Intrinsic<[llvm_double_ty], [llvm_double_ty], []>;
+ def int_ppc_setflm : GCCBuiltin<"__builtin_setflm">,
+ Intrinsic<[llvm_double_ty], [llvm_double_ty], []>;
// Intrinsics for [double]word extended forms of divide instructions
def int_ppc_divwe : GCCBuiltin<"__builtin_divwe">,
Index: clang/test/CodeGen/builtins-ppc.c
===================================================================
--- clang/test/CodeGen/builtins-ppc.c
+++ clang/test/CodeGen/builtins-ppc.c
@@ -27,3 +27,12 @@
// CHECK: call double @llvm.ppc.setrnd(i32 %2)
res = __builtin_setrnd(x);
}
+
+void test_builtin_ppc_flm() {
+ volatile double res;
+ // CHECK: call double @llvm.ppc.readflm()
+ res = __builtin_readflm();
+
+ // CHECK: call double @llvm.ppc.setflm(double %1)
+ res = __builtin_setflm(res);
+}
Index: clang/include/clang/Basic/BuiltinsPPC.def
===================================================================
--- clang/include/clang/Basic/BuiltinsPPC.def
+++ clang/include/clang/Basic/BuiltinsPPC.def
@@ -549,6 +549,12 @@
// Set the floating point rounding mode
BUILTIN(__builtin_setrnd, "di", "")
+// Get content from current FPSCR
+BUILTIN(__builtin_readflm, "d", "")
+
+// Set content of FPSCR, and return its content before update
+BUILTIN(__builtin_setflm, "dd", "")
+
// Cache built-ins
BUILTIN(__builtin_dcbf, "vvC*", "")
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