From: Guoqi Chen <chenguoqi@loongson.cn>
Date: Tue, 28 Mar 2023 21:08:28 +0000 (+0800)
Subject: runtime: calculate nanoseconds in usleep on linux/loong64
X-Git-Tag: go1.21rc1~631
X-Git-Url: http://www.git.cypherpunks.su/?a=commitdiff_plain;h=93897960cb8462f5eefeaffeaa938fb9de5155e7;p=gostls13.git

runtime: calculate nanoseconds in usleep on linux/loong64

Change-Id: Ia4cfdea3df8834e6260527ce8e6e894a0547070f
Reviewed-on: https://go-review.googlesource.com/c/go/+/425299
Reviewed-by: xiaodong liu <teaofmoli@gmail.com>
Reviewed-by: Ian Lance Taylor <iant@google.com>
Auto-Submit: Ian Lance Taylor <iant@google.com>
Run-TryBot: WANG Xuerui <git@xen0n.name>
Reviewed-by: Bryan Mills <bcmills@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Run-TryBot: Ian Lance Taylor <iant@google.com>
Reviewed-by: WANG Xuerui <git@xen0n.name>
Reviewed-by: Meidan Li <limeidan@loongson.cn>
---

diff --git a/src/runtime/sys_linux_loong64.s b/src/runtime/sys_linux_loong64.s
index 006c4bf2d5..486a9b1570 100644
--- a/src/runtime/sys_linux_loong64.s
+++ b/src/runtime/sys_linux_loong64.s
@@ -120,19 +120,19 @@ TEXT runtime·pipe2(SB),NOSPLIT|NOFRAME,$0-20
 
 // func usleep(usec uint32)
 TEXT runtime·usleep(SB),NOSPLIT,$16-4
-	MOVWU	usec+0(FP), R6
-	MOVV	R6, R5
-	MOVW	$1000000, R4
-	DIVVU	R4, R6, R6
-	MOVV	R6, 8(R3)
-	MOVW	$1000, R4
-	MULVU	R6, R4, R4
-	SUBVU	R4, R5
-	MOVV	R5, 16(R3)
+	MOVWU	usec+0(FP), R7
+	MOVV	$1000, R6
+	MULVU	R6, R7, R7
+	MOVV	$1000000000, R6
+
+	DIVVU	R6, R7, R5	// ts->tv_sec
+	REMVU	R6, R7, R4	// ts->tv_nsec
+	MOVV	R5, 8(R3)
+	MOVV	R4, 16(R3)
 
 	// nanosleep(&ts, 0)
 	ADDV	$8, R3, R4
-	MOVW	$0, R5
+	MOVV	R0, R5
 	MOVV	$SYS_nanosleep, R11
 	SYSCALL
 	RET