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-rw-r--r--src/llvm_backend_proc.cpp13
1 files changed, 13 insertions, 0 deletions
diff --git a/src/llvm_backend_proc.cpp b/src/llvm_backend_proc.cpp
index ffa434278..3f5819b43 100644
--- a/src/llvm_backend_proc.cpp
+++ b/src/llvm_backend_proc.cpp
@@ -2809,6 +2809,19 @@ gb_internal lbValue lb_build_builtin_proc(lbProcedure *p, Ast *expr, TypeAndValu
}
return res;
}
+ case BuiltinProc_arm64_read_cycle_counter_frequency:
+ {
+ lbValue res = {};
+ res.type = tv.type;
+
+ LLVMTypeRef func_type = LLVMFunctionType(LLVMInt64TypeInContext(p->module->ctx), nullptr, 0, false);
+ bool has_side_effects = false;
+ LLVMValueRef the_asm = llvm_get_inline_asm(func_type, str_lit("mrs $0, cntfrq_el0"), str_lit("=r"), has_side_effects);
+ GB_ASSERT(the_asm != nullptr);
+ res.value = LLVMBuildCall2(p->builder, func_type, the_asm, nullptr, 0, "");
+
+ return res;
+ }
case BuiltinProc_count_trailing_zeros:
return lb_emit_count_trailing_zeros(p, lb_build_expr(p, ce->args[0]), tv.type);