aarch64: PR target/115475 Implement missing __ARM_FEATURE_SVE_BF16 macro

The ACLE requires __ARM_FEATURE_SVE_BF16 to be enabled when SVE and BF16
and the associated intrinsics are available.
GCC does support the required intrinsics for TARGET_SVE_BF16 so define
this macro too.

Bootstrapped and tested on aarch64-none-linux-gnu.

gcc/

	PR target/115475
	* config/aarch64/aarch64-c.cc (aarch64_update_cpp_builtins):
	Define __ARM_FEATURE_SVE_BF16 for TARGET_SVE_BF16.

gcc/testsuite/

	PR target/115475
	* gcc.target/aarch64/acle/bf16_sve_feature.c: New test.

Signed-off-by: Kyrylo Tkachov <ktkachov@nvidia.com>

diff --git a/gcc/config/aarch64/aarch64-c.cc b/gcc/config/aarch64/aarch64-c.cc
index f5d70339e4ee61e4b7bfede4a174d020410a73b3..2aff097dd33c1892d255f7227c72dc90892bc78a 100644 (file)
--- a/gcc/config/aarch64/aarch64-c.cc
+++ b/gcc/config/aarch64/aarch64-c.cc
@@ -254,6 +254,9 @@ aarch64_update_cpp_builtins (cpp_reader *pfile)
                        "__ARM_FEATURE_BF16_SCALAR_ARITHMETIC", pfile);
   aarch64_def_or_undef (TARGET_BF16_FP,
                        "__ARM_FEATURE_BF16", pfile);
+  aarch64_def_or_undef (TARGET_SVE_BF16,
+                       "__ARM_FEATURE_SVE_BF16", pfile);
+
   aarch64_def_or_undef (TARGET_LS64,
                        "__ARM_FEATURE_LS64", pfile);
   aarch64_def_or_undef (AARCH64_ISA_RCPC, "__ARM_FEATURE_RCPC", pfile);

diff --git a/gcc/testsuite/gcc.target/aarch64/acle/bf16_sve_feature.c b/gcc/testsuite/gcc.target/aarch64/acle/bf16_sve_feature.c
new file mode 100644 (file)
index 0000000..cb3ddac
--- /dev/null
+++ b/gcc/testsuite/gcc.target/aarch64/acle/bf16_sve_feature.c
@@ -0,0 +1,10 @@
+/* { dg-do compile } */
+
+#pragma GCC target "+sve+bf16"
+#ifndef __ARM_FEATURE_SVE_BF16
+#error "__ARM_FEATURE_SVE_BF16 is not defined but should be!"
+#endif
+
+void
+foo (void) {}
+