From: Joel Sing <joel@sing.id.au>
Date: Mon, 4 May 2020 17:15:58 +0000 (+1000)
Subject: runtime: use riscv64 RDTIME instruction
X-Git-Tag: go1.16beta1~1348
X-Git-Url: http://www.git.cypherpunks.su/?a=commitdiff_plain;h=cf9b4f63a57b4360be700831781885fc6cf5a0b1;p=gostls13.git

runtime: use riscv64 RDTIME instruction

Use the actual RDTIME instruction, rather than a WORD.
Generated code is the same.

Change-Id: I6f6f5a1836eae2d05af34d4a22db2ede4fdcb458
Reviewed-on: https://go-review.googlesource.com/c/go/+/231997
Reviewed-by: Cherry Zhang <cherryyz@google.com>
Run-TryBot: Cherry Zhang <cherryyz@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
---

diff --git a/src/runtime/asm_riscv64.s b/src/runtime/asm_riscv64.s
index d7c45a183d..8f6c8773eb 100644
--- a/src/runtime/asm_riscv64.s
+++ b/src/runtime/asm_riscv64.s
@@ -79,7 +79,7 @@ TEXT setg_gcc<>(SB),NOSPLIT,$0-0
 
 // func cputicks() int64
 TEXT runtime·cputicks(SB),NOSPLIT,$0-8
-	WORD	$0xc0102573	// rdtime a0
+	RDTIME	A0
 	MOV	A0, ret+0(FP)
 	RET