Module Name: src
Committed By: rin
Date: Tue Aug 30 10:43:38 UTC 2022
Modified Files:
src/sys/arch/powerpc/fpu: fpu_emu.c
Log Message:
Revert rev 1.29:
http://cvsweb.netbsd.org/bsdweb.cgi/src/sys/arch/powerpc/fpu/fpu_emu.c#rev1.29
> FPSCR[FEX] is not a sticky bit; it is always cleared when read from
> userland via mffs on real hardware.
This turned out to be wrong. FEX is actually observed for 603e.
To generate a diff of this commit:
cvs rdiff -u -r1.36 -r1.37 src/sys/arch/powerpc/fpu/fpu_emu.c
Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.
Modified files:
Index: src/sys/arch/powerpc/fpu/fpu_emu.c
diff -u src/sys/arch/powerpc/fpu/fpu_emu.c:1.36 src/sys/arch/powerpc/fpu/fpu_emu.c:1.37
--- src/sys/arch/powerpc/fpu/fpu_emu.c:1.36 Wed Jul 27 04:17:02 2022
+++ src/sys/arch/powerpc/fpu/fpu_emu.c Tue Aug 30 10:43:38 2022
@@ -1,4 +1,4 @@
-/* $NetBSD: fpu_emu.c,v 1.36 2022/07/27 04:17:02 rin Exp $ */
+/* $NetBSD: fpu_emu.c,v 1.37 2022/08/30 10:43:38 rin Exp $ */
/*
* Copyright 2001 Wasabi Systems, Inc.
@@ -76,7 +76,7 @@
*/
#include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: fpu_emu.c,v 1.36 2022/07/27 04:17:02 rin Exp $");
+__KERNEL_RCSID(0, "$NetBSD: fpu_emu.c,v 1.37 2022/08/30 10:43:38 rin Exp $");
#ifdef _KERNEL_OPT
#include "opt_ddb.h"
@@ -583,8 +583,6 @@ fpu_execute(struct trapframe *tf, struct
case OPC63_MFFS:
FPU_EMU_EVCNT_INCR(mffs);
DPRINTF(FPE_INSN, ("fpu_execute: MFFS\n"));
- /* XXX FEX is not sticky */
- fs->fpscr &= ~FPSCR_FEX;
memcpy(&fs->fpreg[rt], &fs->fpscr,
sizeof(fs->fpscr));
break;
