From 5a4e0d121ab199d8a2036b219065f30f9f7411a3 Mon Sep 17 00:00:00 2001
From: Ian Lance Taylor <iant@golang.org>
Date: Fri, 1 Jan 2021 12:05:39 -0800
Subject: [PATCH] internal/cpu: add aarch64 support functions
Patch from Andreas Schwab.
Reviewed-on: https://go-review.googlesource.com/c/gofrontend/+/281000
---
gcc/go/gofrontend/MERGE | 2 +-
libgo/go/internal/cpu/cpu_gccgo.c | 26 ++++++++++++++++++++++++++
2 files changed, 27 insertions(+), 1 deletion(-)
diff --git a/gcc/go/gofrontend/MERGE b/gcc/go/gofrontend/MERGE
index e51285c72142..f4c99756d25f 100644
--- a/gcc/go/gofrontend/MERGE
+++ b/gcc/go/gofrontend/MERGE
@@ -1,4 +1,4 @@
-fa161cb71880cf80ef53fb4bf35dba8ee01af648
+2b5bdd22b7ec2fc13ae0f644c781f64c1a209500
The first line of this file holds the git revision number of the last
merge done from the gofrontend repository.
diff --git a/libgo/go/internal/cpu/cpu_gccgo.c b/libgo/go/internal/cpu/cpu_gccgo.c
index da26f4d7407a..6a20b3944696 100644
--- a/libgo/go/internal/cpu/cpu_gccgo.c
+++ b/libgo/go/internal/cpu/cpu_gccgo.c
@@ -200,3 +200,29 @@ struct queryResult kdsaQuery() {
}
#endif /* defined(__s390x__) */
+
+#ifdef __aarch64__
+
+uint64_t getisar0(void)
+ __asm__(GOSYM_PREFIX "internal_1cpu.getisar0")
+ __attribute__((no_split_stack));
+
+uint64_t getisar0() {
+ uint64_t isar0;
+
+ __asm__("mrs %0,id_aa64isar0_el1" : "=r"(isar0));
+ return isar0;
+}
+
+uint64_t getMIDR(void)
+ __asm__(GOSYM_PREFIX "internal_1cpu.getMIDR")
+ __attribute__((no_split_stack));
+
+uint64_t getMIDR() {
+ uint64_t MIDR;
+
+ __asm__("mrs %0,midr_el1" : "=r"(MIDR));
+ return MIDR;
+}
+
+#endif /* defined(__aarch64__) */
--
GitLab