diff options
| -rw-r--r-- | src/data.c | 12 |
1 files changed, 10 insertions, 2 deletions
diff --git a/src/data.c b/src/data.c index 1835404621..eb1cbf77bb 100644 --- a/src/data.c +++ b/src/data.c @@ -2481,8 +2481,12 @@ In this case, the sign bit is duplicated.") CHECK_NUMBER (value, 0); CHECK_NUMBER (count, 1); - if (XINT (count) > 0) + if (XINT (count) >= BITS_PER_EMACS_INT) + XSETINT (val, 0); + else if (XINT (count) > 0) XSETINT (val, XINT (value) << XFASTINT (count)); + else if (XINT (count) <= -BITS_PER_EMACS_INT) + XSETINT (val, XINT (value) < 0 ? -1 : 0); else XSETINT (val, XINT (value) >> -XINT (count)); return val; @@ -2500,8 +2504,12 @@ In this case, zeros are shifted in on the left.") CHECK_NUMBER (value, 0); CHECK_NUMBER (count, 1); - if (XINT (count) > 0) + if (XINT (count) >= BITS_PER_EMACS_INT) + XSETINT (val, 0); + else if (XINT (count) > 0) XSETINT (val, (EMACS_UINT) XUINT (value) << XFASTINT (count)); + else if (XINT (count) <= -BITS_PER_EMACS_INT) + XSETINT (val, 0); else XSETINT (val, (EMACS_UINT) XUINT (value) >> -XINT (count)); return val; |