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| author | rth <rth@138bc75d-0d04-0410-961f-82ee72b054a4> | 2000-10-06 05:32:59 +0000 |
|---|---|---|
| committer | rth <rth@138bc75d-0d04-0410-961f-82ee72b054a4> | 2000-10-06 05:32:59 +0000 |
| commit | d0b85c45f700e6b6e97608db91b7f071a8acea17 (patch) | |
| tree | 042703dd3c9dafb35f6e957d0a09b09bb429bcb7 | |
| parent | 9ce1b52b3654f3d39a5560b8c2fc5864d556a54d (diff) | |
| download | gcc-d0b85c45f700e6b6e97608db91b7f071a8acea17.tar.gz | |
* longlong.h [alpha] (count_leading_zeros): Use cmpbge with
a zero instead of -1.
(count_trailing_zeros): Likewise.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@36745 138bc75d-0d04-0410-961f-82ee72b054a4
| -rw-r--r-- | gcc/ChangeLog | 4 | ||||
| -rw-r--r-- | gcc/longlong.h | 4 |
2 files changed, 6 insertions, 2 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 111b37d45fe..c1bb180bab2 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -5,6 +5,10 @@ (__clz_tab): Put in its own unit, non-static. * libgcc2.h: Always include longlong.h. + * longlong.h [alpha] (count_leading_zeros): Use cmpbge with + a zero instead of -1. + (count_trailing_zeros): Likewise. + 2000-10-05 Richard Henderson <rth@cygnus.com> * config/alpha/alpha.c (alpha_emit_setcc): Don't swap GT tests diff --git a/gcc/longlong.h b/gcc/longlong.h index 25b952c081c..bcd4abc843e 100644 --- a/gcc/longlong.h +++ b/gcc/longlong.h @@ -180,7 +180,7 @@ extern const UQItype __clz_tab[]; #define count_leading_zeros(COUNT,X) \ do { \ UDItype __xr = (X), __t, __a; \ - __asm__("cmpbge %1,%2,%0" : "=r"(__t) : "r"(~__xr), "r"(-1)); \ + __asm__("cmpbge $31,%1,%0" : "=r"(__t) : "r"(__xr)); \ __a = __clz_tab[__t ^ 0xff] - 1; \ __asm__("extbl %1,%2,%0" : "=r"(__t) : "r"(__xr), "r"(__a)); \ (COUNT) = 64 - (__clz_tab[__t] + __a*8); \ @@ -188,7 +188,7 @@ extern const UQItype __clz_tab[]; #define count_trailing_zeros(COUNT,X) \ do { \ UDItype __xr = (X), __t, __a; \ - __asm__("cmpbge %1,%2,%0" : "=r"(__t) : "r"(~__xr), "r"(-1)); \ + __asm__("cmpbge $31,%1,%0" : "=r"(__t) : "r"(__xr)); \ __t = ~__t & -~__t; \ __a = ((__t & 0xCC) != 0) * 2; \ __a += ((__t & 0xF0) != 0) * 4; \ |