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| author | Steven Munroe <sjmunroe@us.ibm.com> | 2008-05-23 14:36:54 +0000 |
|---|---|---|
| committer | Nathan Froyd <froydnj@gcc.gnu.org> | 2008-05-23 14:36:54 +0000 |
| commit | c201998ae941d04578f1f54f1ce6bd7f41ac2668 (patch) | |
| tree | 80f96574206e65b4de70bf22b8c57bcf86e1fa3e /gcc | |
| parent | 430b2815a3ef5f81bc860582f2f32eebbd4ee9cb (diff) | |
| download | gcc-c201998ae941d04578f1f54f1ce6bd7f41ac2668.zip gcc-c201998ae941d04578f1f54f1ce6bd7f41ac2668.tar.gz gcc-c201998ae941d04578f1f54f1ce6bd7f41ac2668.tar.bz2 | |
darwin-ldouble.c (fmsub): Eliminate the full PACK/UNPACK between FP_SUB_Q and FD_TRUNC so that the result...
* config/rs6000/darwin-ldouble.c (fmsub): Eliminate the full
PACK/UNPACK between FP_SUB_Q and FD_TRUNC so that the result
is only rounded once.
From-SVN: r135815
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/ChangeLog | 6 | ||||
| -rw-r--r-- | gcc/config/rs6000/darwin-ldouble.c | 6 |
2 files changed, 8 insertions, 4 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index eace21c..cadf9d1 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,9 @@ +2008-05-23 Steven Munroe <sjmunroe@us.ibm.com> + + * config/rs6000/darwin-ldouble.c (fmsub): Eliminate the full + PACK/UNPACK between FP_SUB_Q and FD_TRUNC so that the result + is only rounded once. + 2008-05-23 Richard Guenther <rguenther@suse.de> * tree-ssa-operands.c (mark_difference_for_renaming): Use diff --git a/gcc/config/rs6000/darwin-ldouble.c b/gcc/config/rs6000/darwin-ldouble.c index 7aa15b6..15cac65 100644 --- a/gcc/config/rs6000/darwin-ldouble.c +++ b/gcc/config/rs6000/darwin-ldouble.c @@ -422,15 +422,13 @@ fmsub (double a, double b, double c) FP_UNPACK_SEMIRAW_Q(U,u); FP_UNPACK_SEMIRAW_Q(Z,z); FP_SUB_Q(V,U,Z); - FP_PACK_SEMIRAW_Q(v,V); - FP_HANDLE_EXCEPTIONS; /* Truncate quad to double. */ - FP_INIT_ROUNDMODE; - FP_UNPACK_SEMIRAW_Q(V,v); #if (2 * _FP_W_TYPE_SIZE) < _FP_FRACBITS_Q + V_f[3] &= 0x0007ffff; FP_TRUNC(D,Q,2,4,R,V); #else + V_f1 &= 0x0007ffffffffffffL; FP_TRUNC(D,Q,1,2,R,V); #endif FP_PACK_SEMIRAW_D(r,R); |