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| author | Mark H Weaver <mhw@netris.org> | 2013-03-03 04:35:09 -0500 |
|---|---|---|
| committer | Mark H Weaver <mhw@netris.org> | 2013-03-12 15:39:20 -0400 |
| commit | e08a12b5356c20ed0418bcaee136eb3632c5616f (patch) | |
| tree | ac3a759997554ee2889ffa8e0d1a09f6ce3023ee /libguile/numbers.h | |
| parent | a285b18ca820e089e2e5d02f8ed07a1e341dffc3 (diff) | |
| download | guile-e08a12b5356c20ed0418bcaee136eb3632c5616f.tar.gz | |
Add 'round-ash', a rounding arithmetic shift operator
* libguile/numbers.c (left_shift_exact_integer,
floor_right_shift_exact_integer, round_right_shift_exact_integer): New
static functions.
(scm_round_ash): New procedure.
(scm_ash): Reimplement in terms of 'left_shift_exact_integer' and
'floor_right_shift_exact_integer'.
* libguile/numbers.h: Add prototype for scm_round_ash. Rename the
second argument of 'scm_ash' from 'cnt' to 'count'.
* test-suite/tests/numbers.test (round-ash, ash): Add new unified
testing framework for 'ash' and 'round-ash'. Previously, the tests
for 'ash' were not very comprehensive; for example, they did not
include a single test where the number to be shifted was a bignum.
* doc/ref/api-data.texi (Bitwise Operations): Add documentation for
'round-ash'. Improve documentation for `ash'.
Diffstat (limited to 'libguile/numbers.h')
| -rw-r--r-- | libguile/numbers.h | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/libguile/numbers.h b/libguile/numbers.h index 2c8b2602e..912f287bb 100644 --- a/libguile/numbers.h +++ b/libguile/numbers.h @@ -206,7 +206,8 @@ SCM_API SCM scm_logbit_p (SCM n1, SCM n2); SCM_API SCM scm_lognot (SCM n); SCM_API SCM scm_modulo_expt (SCM n, SCM k, SCM m); SCM_API SCM scm_integer_expt (SCM z1, SCM z2); -SCM_API SCM scm_ash (SCM n, SCM cnt); +SCM_API SCM scm_ash (SCM n, SCM count); +SCM_API SCM scm_round_ash (SCM n, SCM count); SCM_API SCM scm_bit_extract (SCM n, SCM start, SCM end); SCM_API SCM scm_logcount (SCM n); SCM_API SCM scm_integer_length (SCM n); |