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| author | Nick Clifton <nickc@redhat.com> | 2012-07-31 09:09:29 +0000 |
|---|---|---|
| committer | Nick Clifton <nickc@gcc.gnu.org> | 2012-07-31 09:09:29 +0000 |
| commit | 0d13c974d946713065b57fdcd46d5d5b2af3beb0 (patch) | |
| tree | 8de31a6c11e026f1bf000f8dd3508a37466d9238 /libgcc | |
| parent | d555a90ebed1156180138ff9a1aabfa19ecc2d76 (diff) | |
| download | gcc-0d13c974d946713065b57fdcd46d5d5b2af3beb0.tar.gz | |
lib2funcs.c (__clrsbhi2): New function.
* config/stormy16/lib2funcs.c (__clrsbhi2): New function.
Implements __clrsb for an HImode argument.
* config/stormy16/clrsbhi2.c: New file:
* config/stormy16/t-stormy16 (LIB2ADD): Add clrsbhi2.c.
From-SVN: r189997
Diffstat (limited to 'libgcc')
| -rw-r--r-- | libgcc/ChangeLog | 7 | ||||
| -rw-r--r-- | libgcc/config/stormy16/clrsbhi2.c | 2 | ||||
| -rw-r--r-- | libgcc/config/stormy16/lib2funcs.c | 16 | ||||
| -rw-r--r-- | libgcc/config/stormy16/t-stormy16 | 1 |
4 files changed, 26 insertions, 0 deletions
diff --git a/libgcc/ChangeLog b/libgcc/ChangeLog index bcfd22b41f9..9d629e6ab8c 100644 --- a/libgcc/ChangeLog +++ b/libgcc/ChangeLog @@ -1,3 +1,10 @@ +2012-07-31 Nick Clifton <nickc@redhat.com> + + * config/stormy16/lib2funcs.c (__clrsbhi2): New function. + Implements __clrsb for an HImode argument. + * config/stormy16/clrsbhi2.c: New file: + * config/stormy16/t-stormy16 (LIB2ADD): Add clrsbhi2.c. + 2012-07-22 Steven Bosscher <steven@gcc.gnu.org> * libgcov.c (__gcov_ior_profiler): Benign comment fix. diff --git a/libgcc/config/stormy16/clrsbhi2.c b/libgcc/config/stormy16/clrsbhi2.c new file mode 100644 index 00000000000..3ce41aca061 --- /dev/null +++ b/libgcc/config/stormy16/clrsbhi2.c @@ -0,0 +1,2 @@ +#define XSTORMY16_CLRSBHI2 +#include "lib2funcs.c" diff --git a/libgcc/config/stormy16/lib2funcs.c b/libgcc/config/stormy16/lib2funcs.c index a10a9b28119..a996fd15e24 100644 --- a/libgcc/config/stormy16/lib2funcs.c +++ b/libgcc/config/stormy16/lib2funcs.c @@ -311,6 +311,22 @@ __ffshi2 (UHWtype u) } #endif +#ifdef XSTORMY16_CLRSBHI2 +/* Returns the number of leading redundant sign bits in X. + I.e. the number of bits following the most significant bit which are + identical to it. There are no special cases for 0 or other values. */ + +int +__clrsbhi2 (HWtype x) +{ + if (x < 0) + x = ~x; + if (x == 0) + return 15; + return __builtin_clz (x) - 1; +} +#endif + #ifdef XSTORMY16_UCMPSI2 /* Performs an unsigned comparison of two 32-bit values: A and B. If A is less than B, then 0 is returned. If A is greater than B, diff --git a/libgcc/config/stormy16/t-stormy16 b/libgcc/config/stormy16/t-stormy16 index d62d167d93d..48ded89d3bf 100644 --- a/libgcc/config/stormy16/t-stormy16 +++ b/libgcc/config/stormy16/t-stormy16 @@ -33,6 +33,7 @@ LIB2ADD = \ $(srcdir)/config/stormy16/clzhi2.c \ $(srcdir)/config/stormy16/ctzhi2.c \ $(srcdir)/config/stormy16/ffshi2.c \ + $(srcdir)/config/stormy16/clrsbhi2.c \ $(srcdir)/config/stormy16/cmpsi2.c \ $(srcdir)/config/stormy16/ucmpsi2.c |