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optabs.c (expand_float): Don't allow mode widening that causes double rounding. 

* optabs.c (expand_float): Don't allow mode widening that causes
double rounding.

From-SVN: r33894
This commit is contained in:
Geoff Keating 2000-05-14 21:18:13 +00:00 committed by Geoffrey Keating
parent fa06229fde
commit 5ba02ca647
2 changed files with 8 additions and 1 deletions
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5
gcc/ChangeLog
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@ -1,4 +1,7 @@
2000-05-13 Geoffrey Keating <geoffk@cygnus.com>
2000-05-14 Geoffrey Keating <geoffk@cygnus.com>
* optabs.c (expand_float): Don't allow mode widening that causes
double rounding.
* invoke.texi (RS/6000 and PowerPC Options): Update -m64/-m32
flags to their current names -maix64 and -maix32.

4
gcc/optabs.c
View File

@ -3888,6 +3888,10 @@ expand_float (to, from, unsignedp)
{
int doing_unsigned = unsignedp;
if (fmode != GET_MODE (to)
&& significand_size (fmode) < GET_MODE_BITSIZE (GET_MODE (from)))
continue;
icode = can_float_p (fmode, imode, unsignedp);
if (icode == CODE_FOR_nothing && imode != GET_MODE (from) && unsignedp)
icode = can_float_p (fmode, imode, 0), doing_unsigned = 0;