diff options
| -rw-r--r-- | gcc/wide-int.cc | 13 |
1 files changed, 12 insertions, 1 deletions
diff --git a/gcc/wide-int.cc b/gcc/wide-int.cc index f61b9fefc13..1fee0788554 100644 --- a/gcc/wide-int.cc +++ b/gcc/wide-int.cc @@ -842,6 +842,13 @@ wi::shifted_mask (HOST_WIDE_INT *val, unsigned int start, unsigned int width, val[i++] = negate ? block : ~block; } + if (end >= prec) + { + if (!shift) + val[i++] = negate ? 0 : -1; + return i; + } + while (i < end / HOST_BITS_PER_WIDE_INT) /* 1111111 */ val[i++] = negate ? 0 : -1; @@ -853,7 +860,7 @@ wi::shifted_mask (HOST_WIDE_INT *val, unsigned int start, unsigned int width, HOST_WIDE_INT block = (HOST_WIDE_INT_1U << shift) - 1; val[i++] = negate ? ~block : block; } - else if (end < prec) + else val[i++] = negate ? -1 : 0; return i; @@ -2583,6 +2590,10 @@ wide_int_cc_tests () run_all_wide_int_tests <widest_int> (); test_overflow (); test_round_for_mask (); + ASSERT_EQ (wi::mask (128, false, 128), + wi::shifted_mask (0, 128, false, 128)); + ASSERT_EQ (wi::mask (128, true, 128), + wi::shifted_mask (0, 128, true, 128)); } } // namespace selftest |