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(parent: eb405c4) | patch
re PR target/47989 (-mrecip causes 482.sphinx3, 464.h264ref and 481.wrf to miscompare)
authorUros Bizjak <uros@gcc.gnu.org>
Thu, 20 Oct 2011 15:13:30 +0000 (17:13 +0200)
committerUros Bizjak <uros@gcc.gnu.org>
Thu, 20 Oct 2011 15:13:30 +0000 (17:13 +0200)
commitbbe996ec7145da4d484bce0368ddd7b3aa5212bd
treeb2865b0329a5ef25c74c1e8566b4243511b4c51atree
parenteb405c4669307ce3b5026984e010faf78571e8b3commit | diff
re PR target/47989 (-mrecip causes 482.sphinx3, 464.h264ref and 481.wrf to miscompare)

PR target/47989
* config/i386/i386.h (RECIP_MASK_DEFAULT): New define.
* config/i386/i386.op (recip_mask): Initialize with RECIP_MASK_DEFAULT.
* doc/invoke.texi (ix86 Options, -mrecip): Document that GCC
implements vectorized single float division and vectorized sqrtf(x)
with reciprocal sequence with additional Newton-Raphson step with
-ffast-math.

From-SVN: r180256
gcc/ChangeLog diff | blob | history
gcc/config/i386/i386.h diff | blob | history
gcc/config/i386/i386.opt diff | blob | history
gcc/doc/invoke.texi diff | blob | history