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[ARM] vfp: fix leak of VFP_NAN_FLAG into FPSCR

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The VFP code can leak VFP_NAN_FLAG into the FPSCR. It doesn't correspond
to any real FPSCR bit (and overlaps one of the exception flags).

Bug report from Daniel Jacobowitz

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
This commit is contained in:
Russell King 2006-04-25 20:41:27 +01:00 committed by Russell King
parent c7fd84424f
commit 928bd1b470
3 changed files with 3 additions and 3 deletions
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2
arch/arm/vfp/vfpdouble.c
View File

@ -197,7 +197,7 @@ u32 vfp_double_normaliseround(int dd, struct vfp_double *vd, u32 fpscr, u32 exce
dd, d, exceptions); dd, d, exceptions);
vfp_put_double(dd, d); vfp_put_double(dd, d);
} }
return exceptions & ~VFP_NAN_FLAG; return exceptions;
} }
/* /*

2
arch/arm/vfp/vfpmodule.c
View File

@ -180,7 +180,7 @@ static u32 vfp_emulate_instruction(u32 inst, u32 fpscr, struct pt_regs *regs)
* emulate it. * emulate it.
*/ */
} }
return exceptions; return exceptions & ~VFP_NAN_FLAG;
} }
/* /*

2
arch/arm/vfp/vfpsingle.c
View File

@ -203,7 +203,7 @@ u32 vfp_single_normaliseround(int sd, struct vfp_single *vs, u32 fpscr, u32 exce
vfp_put_float(sd, d); vfp_put_float(sd, d);
} }
return exceptions & ~VFP_NAN_FLAG; return exceptions;
} }
/* /*