Module Name: src Committed By: rin Date: Wed Jul 15 08:29:07 UTC 2020
Modified Files: src/sys/arch/powerpc/fpu: fpu_emu.c Log Message: FPSCR[FEX] is not a sticky bit; it is always cleared when read from userland via mffs on real hardware. To generate a diff of this commit: cvs rdiff -u -r1.28 -r1.29 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:1.28 src/sys/arch/powerpc/fpu/fpu_emu.c:1.29 --- src/sys/arch/powerpc/fpu/fpu_emu.c:1.28 Wed Jul 15 08:10:41 2020 +++ src/sys/arch/powerpc/fpu/fpu_emu.c Wed Jul 15 08:29:07 2020 @@ -1,4 +1,4 @@ -/* $NetBSD: fpu_emu.c,v 1.28 2020/07/15 08:10:41 rin Exp $ */ +/* $NetBSD: fpu_emu.c,v 1.29 2020/07/15 08:29:07 rin Exp $ */ /* * Copyright 2001 Wasabi Systems, Inc. @@ -76,7 +76,7 @@ */ #include <sys/cdefs.h> -__KERNEL_RCSID(0, "$NetBSD: fpu_emu.c,v 1.28 2020/07/15 08:10:41 rin Exp $"); +__KERNEL_RCSID(0, "$NetBSD: fpu_emu.c,v 1.29 2020/07/15 08:29:07 rin Exp $"); #ifdef _KERNEL_OPT #include "opt_ddb.h" @@ -571,6 +571,8 @@ 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;