[src/trunk]: src/sys/arch/macppc/stand/bootxx Avoid warning about dcbf, icbi ...

[uwe <uwe%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/a68a3982e53e
branches:  trunk
changeset: 848288:a68a3982e53e
user:      uwe <uwe%NetBSD.org@localhost>
date:      Thu Jan 23 17:23:03 2020 +0000

description:
Avoid warning about dcbf, icbi first argument.

as(1) is not quite happy when RA=0 argument to these instructions is
spelled as %r0 and emits a warning.  Spell that argument as 0 to
placate it.  Same object code is generated.

diffstat:

 sys/arch/macppc/stand/bootxx/bootxx.c |  6 +++---
 1 files changed, 3 insertions(+), 3 deletions(-)

diffs (20 lines):

diff -r ce726346ce5f -r a68a3982e53e sys/arch/macppc/stand/bootxx/bootxx.c
--- a/sys/arch/macppc/stand/bootxx/bootxx.c     Thu Jan 23 17:03:20 2020 +0000
+++ b/sys/arch/macppc/stand/bootxx/bootxx.c     Thu Jan 23 17:23:03 2020 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: bootxx.c,v 1.20 2019/10/28 18:13:40 joerg Exp $        */
+/*     $NetBSD: bootxx.c,v 1.21 2020/01/23 17:23:03 uwe Exp $  */
 
 /*
  * Copyright (C) 1995, 1996 Wolfgang Solfrank.
@@ -70,8 +70,8 @@
 "      li      %r9,0x40        \n"     /* loop 64 times (for 2048 bytes of bootxx) */
 "      mtctr   %r9             \n"
 "                              \n"
-"1:    dcbf    %r0,%r8         \n"
-"      icbi    %r0,%r8         \n"
+"1:    dcbf    0,%r8           \n"
+"      icbi    0,%r8           \n"
 "      addi    %r8,%r8,0x20    \n"
 "      bdnz    1b              \n"
 "      sync                    \n"