diff options
| author | jsm28 <jsm28@138bc75d-0d04-0410-961f-82ee72b054a4> | 2005-11-28 13:41:38 +0000 |
|---|---|---|
| committer | jsm28 <jsm28@138bc75d-0d04-0410-961f-82ee72b054a4> | 2005-11-28 13:41:38 +0000 |
| commit | 2a33161dade1a9b493ed07265861620dc3c82c94 (patch) | |
| tree | 739d354e74f2c75e38b0fcff7be1faa168423800 /gcc | |
| parent | 88eaee2d9e837474fca5895d712c4958305ca3f5 (diff) | |
| download | gcc-2a33161dade1a9b493ed07265861620dc3c82c94.tar.gz | |
* config/fp-bit.h (LSHIFT): Take shift count parameter.
* config/fp-bit.c (_fpadd_parts): Shift in one go instead of one
bit at a time.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@107602 138bc75d-0d04-0410-961f-82ee72b054a4
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/ChangeLog | 6 | ||||
| -rw-r--r-- | gcc/config/fp-bit.c | 17 | ||||
| -rw-r--r-- | gcc/config/fp-bit.h | 2 |
3 files changed, 16 insertions, 9 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index aaed30c8290..2320e10de95 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,9 @@ +2005-11-28 Joseph S. Myers <joseph@codesourcery.com> + + * config/fp-bit.h (LSHIFT): Take shift count parameter. + * config/fp-bit.c (_fpadd_parts): Shift in one go instead of one + bit at a time. + 2005-11-28 Bernd Schmidt <bernd.schmidt@analog.com> * config/bfin/bfin.c (bfin_secondary_reload): Renamed from diff --git a/gcc/config/fp-bit.c b/gcc/config/fp-bit.c index ccf927e8c3b..cf943daed91 100644 --- a/gcc/config/fp-bit.c +++ b/gcc/config/fp-bit.c @@ -649,6 +649,7 @@ _fpadd_parts (fp_number_type * a, they're the same */ { int diff; + int sdiff; a_normal_exp = a->normal_exp; b_normal_exp = b->normal_exp; @@ -656,21 +657,21 @@ _fpadd_parts (fp_number_type * a, b_fraction = b->fraction.ll; diff = a_normal_exp - b_normal_exp; + sdiff = diff; if (diff < 0) diff = -diff; if (diff < FRAC_NBITS) { - /* ??? This does shifts one bit at a time. Optimize. */ - while (a_normal_exp > b_normal_exp) + if (sdiff > 0) { - b_normal_exp++; - LSHIFT (b_fraction); + b_normal_exp += diff; + LSHIFT (b_fraction, diff); } - while (b_normal_exp > a_normal_exp) + else if (sdiff < 0) { - a_normal_exp++; - LSHIFT (a_fraction); + a_normal_exp += diff; + LSHIFT (a_fraction, diff); } } else @@ -731,7 +732,7 @@ _fpadd_parts (fp_number_type * a, if (tmp->fraction.ll >= IMPLICIT_2) { - LSHIFT (tmp->fraction.ll); + LSHIFT (tmp->fraction.ll, 1); tmp->normal_exp++; } return tmp; diff --git a/gcc/config/fp-bit.h b/gcc/config/fp-bit.h index 3f7a0dfb315..78d850b5d03 100644 --- a/gcc/config/fp-bit.h +++ b/gcc/config/fp-bit.h @@ -318,7 +318,7 @@ typedef unsigned int UTItype __attribute__ ((mode (TI))); #endif /* Preserve the sticky-bit when shifting fractions to the right. */ -#define LSHIFT(a) { a = (a & 1) | (a >> 1); } +#define LSHIFT(a, s) { a = (a >> s) | !!(a & (((fractype) 1 << s) - 1)); } /* numeric parameters */ /* F_D_BITOFF is the number of bits offset between the MSB of the mantissa |