================
@@ -1600,6 +1600,25 @@ void SVEEmitter::createSMEHeader(raw_ostream &OS) {
OS << "extern \"C\" {\n";
OS << "#endif\n\n";
+ OS << "void __arm_za_disable(void) __arm_streaming_compatible;\n\n";
+
+ OS << "__ai bool __arm_has_sme(void) __arm_streaming_compatible {\n";
+ OS << " uint64_t x0, x1;\n";
+ OS << " __builtin_arm_get_sme_state(&x0, &x1);\n";
+ OS << " return x0 & (1ULL << 63);\n";
+ OS << "}\n\n";
+
+ OS << "__ai bool __arm_in_streaming_mode(void) __arm_streaming_compatible "
+ "{\n";
+ OS << " uint64_t x0, x1;\n";
+ OS << " __builtin_arm_get_sme_state(&x0, &x1);\n";
+ OS << " return x0 & 1;\n";
+ OS << "}\n\n";
+
+ OS << "__ai __attribute__((target(\"sme\"))) void svundef_za(void) "
----------------
paulwalker-arm wrote:
Why is the target attribute required? From reading the ACLE this builtin is not
expected to emit any SME instructions?
https://github.com/llvm/llvm-project/pull/75791
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