Re: [Qemu-devel] [PATCH v2 0/6] target-arm: Fix bugs in fp exception flag setting

[Aurelien Jarno <aurelien@aurel32.net>]

On Thu, May 19, 2011 at 02:46:13PM +0100, Peter Maydell wrote:
> This patch series fixes a number of minor bugs in the ARM target where
> we were not correctly setting the cumulative exception flags in the
> FPSCR. It includes adding a new flag to softfloat indicating when a
> denormal result has been flushed to zero (as discussed previously on
> the list.)
> 
> Tested with the usual random instruction sequence testing (covering
> all the neon and vfp data processing instructions which can set FPSCR
> exception flags). These patches fix all the FPSCR flags bugs I found,
> with the exception of those in the VCVT float-int and float32-float16
> conversion routines, which are a bit trickier to fix because they are
> bugs in softfloat rather than merely in the arm helper functions.
> 
> v1->v2 changes:
>  patches 1,2,3,4,5 are unchanged (v2 patches 4,5 are v1's 6 and 7)
>  v2 patch 6 replaces the v1 patches 4,5, and makes the int-float
>  conversion helpers take just a pointer to the correct fp_status
>  rather than an entire CPUState pointer, as suggested by Paul Brook.
> 
> 
> Peter Maydell (6):
>   target-arm: Don't set FP exceptions in recip, recip_sqrt estimate fns
>   target-arm: Signal InputDenormal for VRECPE, VRSQRTE, VRECPS, VRSQRTS
>   target-arm: Signal InvalidOp for Neon GE and GT compares of QNaN
>   softfloat: Add new flag for when denormal result is flushed to zero
>   target-arm: Signal Underflow when denormal flushed to zero on output
>   target-arm: Use correct float status for Neon int-float conversions
> 
>  fpu/softfloat.c          |   41 ++++++++++--
>  fpu/softfloat.h          |    3 +-
>  target-arm/helper.c      |  158 +++++++++++++++++----------------------------
>  target-arm/helper.h      |   60 +++++++++---------
>  target-arm/neon_helper.c |   40 +++++-------
>  target-arm/translate.c   |  148 +++++++++++++++++++++++--------------------
>  6 files changed, 223 insertions(+), 227 deletions(-)
> 

Thanks, all applied.

-- 
Aurelien Jarno	                        GPG: 1024D/F1BCDB73
aurelien@aurel32.net                 http://www.aurel32.net