Adding upstream version 1.19.8.upstream/1.19.8upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 41 insertions, 0 deletions

diff --git a/src/runtime/memclr_loong64.s b/src/runtime/memclr_loong64.s
new file mode 100644
index 0000000..e4f2058
--- /dev/null
+++ b/src/runtime/memclr_loong64.s
@@ -0,0 +1,41 @@
+// Copyright 2022 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+#include "go_asm.h"
+#include "textflag.h"
+
+// func memclrNoHeapPointers(ptr unsafe.Pointer, n uintptr)
+TEXT runtime·memclrNoHeapPointers(SB),NOSPLIT,$0-16
+	MOVV	ptr+0(FP), R6
+	MOVV	n+8(FP), R7
+	ADDV	R6, R7, R4
+
+	// if less than 8 bytes, do one byte at a time
+	SGTU	$8, R7, R8
+	BNE	R8, out
+
+	// do one byte at a time until 8-aligned
+	AND	$7, R6, R8
+	BEQ	R8, words
+	MOVB	R0, (R6)
+	ADDV	$1, R6
+	JMP	-4(PC)
+
+words:
+	// do 8 bytes at a time if there is room
+	ADDV	$-7, R4, R7
+
+	SGTU	R7, R6, R8
+	BEQ	R8, out
+	MOVV	R0, (R6)
+	ADDV	$8, R6
+	JMP	-4(PC)
+
+out:
+	BEQ	R6, R4, done
+	MOVB	R0, (R6)
+	ADDV	$1, R6
+	JMP	-3(PC)
+done:
+	RET