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Introduce NO_DENORMALS in fp-bit.c 

From-SVN: r32590
This commit is contained in:
Bernd Schmidt 2000-03-16 17:20:57 +00:00 committed by Bernd Schmidt
parent 22eb7dfafe
commit 2672543458
2 changed files with 10 additions and 2 deletions
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3
gcc/ChangeLog
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@ -1,5 +1,8 @@
2000-03-16 Bernd Schmidt <bernds@cygnus.co.uk>
* fp-bit.c (_unpack_d): If NO_DENORMALS is defined, anything that
has exponent 0 is a zero.
* simplify-rtx.c (hash_rtx, case MEM/REG): Take into account that
HASH may already be nonzero. Add code/mode into hash value
immediately after repeat label.

9
gcc/config/fp-bit.c
View File

@ -113,7 +113,8 @@ Boston, MA 02111-1307, USA. */
US Software goFast library. If this is not defined, the entry points use
the same names as libgcc1.c.
_DEBUG_BITFLOAT: This makes debugging the code a little easier, by adding
two integers to the FLO_union_type.
two integers to the FLO_union_type.
NO_DENORMALS: Disable handling of denormals.
NO_NANS: Disable nan and infinity handling
SMALL_MACHINE: Useful when operations on QIs and HIs are faster
than on an SI */
@ -615,7 +616,11 @@ unpack_d (FLO_union_type * src, fp_number_type * dst)
if (exp == 0)
{
/* Hmm. Looks like 0 */
if (fraction == 0)
if (fraction == 0
#ifdef NO_DENORMALS
|| 1
#endif
)
{
/* tastes like zero */
dst->class = CLASS_ZERO;