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| author | Roger Sayle <roger@eyesopen.com> | 2005-02-03 06:44:35 +0000 |
|---|---|---|
| committer | Roger Sayle <sayle@gcc.gnu.org> | 2005-02-03 06:44:35 +0000 |
| commit | 762297d941e94600c6b81d5ccdd464872d9a9692 (patch) | |
| tree | fb250b8935df7ba966a9aeae4f38b4eca4fc2969 /gcc/real.h | |
| parent | 666158b9cecdc55cc2f2cf0c77f571220b5a10c3 (diff) | |
| download | gcc-762297d941e94600c6b81d5ccdd464872d9a9692.tar.gz | |
re PR middle-end/19405 (18_support/numeric_limits.cc fails on ppc-darwin (long doubles))
PR middle-end/19405
* real.h (REAL_MODE_FORMAT_COMPOSITE_P): New macro.
* fold-const.c (const_binop): Avoid constant folding floating
point operations in modes that use composite representations.
* simplify-rtx.c (simplify_binary_operation): Likewise.
From-SVN: r94653
Diffstat (limited to 'gcc/real.h')
| -rw-r--r-- | gcc/real.h | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/gcc/real.h b/gcc/real.h index 13f072e96a8..5c4e9c605d8 100644 --- a/gcc/real.h +++ b/gcc/real.h @@ -157,6 +157,12 @@ extern const struct real_format * #define REAL_MODE_FORMAT(MODE) (real_format_for_mode[(MODE) - MIN_MODE_FLOAT]) +/* The following macro determines whether the floating point format is + composite, i.e. may contain non-consecutive mantissa bits, in which + case compile-time FP overflow may not model run-time overflow. */ +#define REAL_MODE_FORMAT_COMPOSITE_P(MODE) \ + ((REAL_MODE_FORMAT(MODE))->pnan < (REAL_MODE_FORMAT (MODE))->p) + /* Declare functions in real.c. */ /* Binary or unary arithmetic on tree_code. */ |