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| author | Neil Booth <neil@daikokuya.demon.co.uk> | 2002-06-02 19:37:34 +0000 |
|---|---|---|
| committer | Neil Booth <neil@gcc.gnu.org> | 2002-06-02 19:37:34 +0000 |
| commit | ceeedfc11a23c9223095ef4eace51f29fb036aa9 (patch) | |
| tree | 8660e3e7cbb02e35bffcba5d9bb626eaddc20430 /gcc/cppexp.c | |
| parent | 27e511e0d56e4968abd1549b50b62071f22a224f (diff) | |
| download | gcc-ceeedfc11a23c9223095ef4eace51f29fb036aa9.zip gcc-ceeedfc11a23c9223095ef4eace51f29fb036aa9.tar.gz gcc-ceeedfc11a23c9223095ef4eace51f29fb036aa9.tar.bz2 | |
c-common.c (c_common_init): Override cpplib's default warn_long_long setting.
* c-common.c (c_common_init): Override cpplib's default
warn_long_long setting.
* c-lex.c (lex_number): Replace with interpret_integer,
interpret_float, narrowest_unsigned_type and
narrowest_signed_type, taking advantage of the new
cpplib functionality.
* cpperror.c (_cpp_begin_message): If a warning is turned
into an error, avoid printing "warning:".
* cppexp.c (cpp_num_sign_extend): New.
* cppinit.c: Update comment.
* cpplib.h (cpp_num_sign_extend): New.
* tree.h: Update comment.
testsuite:
* gcc.dg/wtr-int-type-1.c, gcc.dg/wtr-suffix-1.c,
gcc.dg/cpp/paste4.c, gcc.dg/cpp/sysmac2.c:
Update for mofified diagnostics.
* gcc.dg/c99-intconst-1.c: No longer fail.
From-SVN: r54180
Diffstat (limited to 'gcc/cppexp.c')
| -rw-r--r-- | gcc/cppexp.c | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/gcc/cppexp.c b/gcc/cppexp.c index 1153768..e5f464e 100644 --- a/gcc/cppexp.c +++ b/gcc/cppexp.c @@ -995,6 +995,33 @@ num_positive (num, precision) return (num.low & (cpp_num_part) 1 << (precision - 1)) == 0; } +/* Sign extend a number, with PRECISION significant bits and all + others assumed clear, to fill out a cpp_num structure. */ +cpp_num +cpp_num_sign_extend (num, precision) + cpp_num num; + size_t precision; +{ + if (!num.unsignedp) + { + if (precision > PART_PRECISION) + { + precision -= PART_PRECISION; + if (precision < PART_PRECISION + && (num.high & (cpp_num_part) 1 << (precision - 1))) + num.high |= ~(~(cpp_num_part) 0 >> (PART_PRECISION - precision)); + } + else if (num.low & (cpp_num_part) 1 << (precision - 1)) + { + if (precision < PART_PRECISION) + num.low |= ~(~(cpp_num_part) 0 >> (PART_PRECISION - precision)); + num.high = ~(cpp_num_part) 0; + } + } + + return num; +} + /* Returns the negative of NUM. */ static cpp_num num_negate (num, precision) |