[src] Improved some comments with "0", about its sign.

git-svn-id: svn://scm.gforge.inria.fr/svn/mpfr/trunk@8630 280ebfd0-de03-0410-8827-d642c229c3f4

4 files changed, 4 insertions, 4 deletions

diff --git a/src/acos.c b/src/acos.c
index 5ab3626a6..738002326 100644
--- a/src/acos.c
+++ b/src/acos.c
@@ -75,7 +75,7 @@ mpfr_acos (mpfr_ptr acos, mpfr_srcptr x, mpfr_rnd_t rnd_mode)
         }
       else
         {
-          if (MPFR_IS_POS_SIGN (sign)) /* acos(+1) = 0 */
+          if (MPFR_IS_POS_SIGN (sign)) /* acos(+1) = +0 */
             return mpfr_set_ui (acos, 0, rnd_mode);
           else /* acos(-1) = Pi */
             return mpfr_const_pi (acos, rnd_mode);
diff --git a/src/acosh.c b/src/acosh.c
index d58f73e4f..15cc3ecec 100644
--- a/src/acosh.c
+++ b/src/acosh.c
@@ -62,7 +62,7 @@ mpfr_acosh (mpfr_ptr y, mpfr_srcptr x , mpfr_rnd_t rnd_mode)
     }
   else if (MPFR_UNLIKELY (comp == 0))
     {
-      MPFR_SET_ZERO (y); /* acosh(1) = 0 */
+      MPFR_SET_ZERO (y); /* acosh(1) = +0 */
       MPFR_SET_POS (y);
       MPFR_RET (0);
     }
diff --git a/src/log.c b/src/log.c
index bb9701634..ff7834b66 100644
--- a/src/log.c
+++ b/src/log.c
@@ -93,7 +93,7 @@ mpfr_log (mpfr_ptr r, mpfr_srcptr a, mpfr_rnd_t rnd_mode)
       MPFR_SET_NAN (r);
       MPFR_RET_NAN;
     }
-  /* If a is 1, the result is 0 */
+  /* If a is 1, the result is +0 */
   else if (MPFR_UNLIKELY (MPFR_GET_EXP (a) == 1 && mpfr_cmp_ui (a, 1) == 0))
     {
       MPFR_SET_ZERO (r);
diff --git a/src/rec_sqrt.c b/src/rec_sqrt.c
index ca5050b92..1e1f46615 100644
--- a/src/rec_sqrt.c
+++ b/src/rec_sqrt.c
@@ -456,7 +456,7 @@ mpfr_rec_sqrt (mpfr_ptr r, mpfr_srcptr u, mpfr_rnd_t rnd_mode)
         }
       else if (MPFR_IS_ZERO(u)) /* 1/sqrt(+0) = 1/sqrt(-0) = +Inf */
         {
-          /* 0+ or 0- */
+          /* +0 or -0 */
           MPFR_SET_INF(r);
           MPFR_SET_POS(r);
           mpfr_set_divby0 ();