diff options
| author | Joseph Myers <joseph@codesourcery.com> | 2008-10-29 17:05:42 +0000 |
|---|---|---|
| committer | Joseph Myers <jsm28@gcc.gnu.org> | 2008-10-29 17:05:42 +0000 |
| commit | 20ded7a68b10f9c2d1aaa94e89df494bf0ce41a0 (patch) | |
| tree | f0bc48b745fe374d4990579d0ef02a2d88bb7799 /gcc/real.h | |
| parent | 669eeb28eaad6f3cb79d48a5e4176775befe0429 (diff) | |
re PR middle-end/36578 (cast to long double not taken into account when result stored to a double)
PR middle-end/36578
* convert.c (convert_to_real): Do not optimize conversions of
binary arithmetic operations between binary and decimal
floating-point types. Consider mode of target type in determining
decimal type for arithmetic. Unless
flag_unsafe_math_optimizations, do not optimize binary conversions
where this may change rounding behavior.
* real.c (real_can_shorten_arithmetic): New.
* real.h (real_can_shorten_arithmetic): Declare.
testsuite:
* gcc.dg/dfp/convert-bfp-13.c, gcc.dg/dfp/convert-bfp-14.c,
gcc.dg/dfp/convert-dfp-fold-2.c, gcc.target/i386/pr36578-1.c,
gcc.target/i386/pr36578-2.c: New tests.
From-SVN: r141432
Diffstat (limited to 'gcc/real.h')
| -rw-r--r-- | gcc/real.h | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/gcc/real.h b/gcc/real.h index 44e79c36e17..5a686536608 100644 --- a/gcc/real.h +++ b/gcc/real.h @@ -438,6 +438,11 @@ extern rtx const_double_from_real_value (REAL_VALUE_TYPE, enum machine_mode); /* Replace R by 1/R in the given machine mode, if the result is exact. */ extern bool exact_real_inverse (enum machine_mode, REAL_VALUE_TYPE *); +/* Return true if arithmetic on values in IMODE that were promoted + from values in TMODE is equivalent to direct arithmetic on values + in TMODE. */ +bool real_can_shorten_arithmetic (enum machine_mode, enum machine_mode); + /* In tree.c: wrap up a REAL_VALUE_TYPE in a tree node. */ extern tree build_real (tree, REAL_VALUE_TYPE); |