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| author | Tejas Joshi <tejasjoshi9673@gmail.com> | 2019-08-26 12:32:29 +0000 |
|---|---|---|
| committer | Martin Jambor <jamborm@gcc.gnu.org> | 2019-08-26 14:32:29 +0200 |
| commit | 7d7b99f95bf2517caab5f9300090b471135b4fc0 (patch) | |
| tree | c215f66b35c9f3508ceb670fbaeae05b7d223c3d /gcc/real.h | |
| parent | 48a31a09839b12127ce7c40d7adc4bd5bf1d3407 (diff) | |
Builtin function roundeven folding implementation
2019-08-26 Tejas Joshi <tejasjoshi9673@gmail.com>
* builtins.c (mathfn_built_in_2): Added CASE_MATHFN_FLOATN
for ROUNDEVEN.
* builtins.def: Added function definitions for roundeven function
variants.
* fold-const-call.c (fold_const_call_ss): Added case for roundeven
function call. Adjust condition for floor, ceil, trunc and round.
* fold-const.c (negate_mathfn_p): Added case for roundeven function.
(tree_call_nonnegative_warnv_p): Added case for roundeven function.
(integer_valued_real_call_p): Added case for roundeven function.
* real.c (is_even): New function. Returns true if real number is even,
otherwise returns false.
(is_halfway_below): New function. Returns true if real number is
halfway between two integers, else return false.
(real_roundeven): New function. Round real number to nearest integer,
rounding halfway cases towards even.
* real.h (real_value): Added descriptive comments. Added function
declaration for roundeven function.
* doc/extend.texi (Other Builtins): List roundeven variants among
functions which can be handled as builtins.
gcc/testsuite/ChangeLog:
2019-08-26 Tejas Joshi <tejasjoshi9673@gmail.com>
* gcc.dg/torture/builtin-round-roundeven.c: New test.
* gcc.dg/torture/builtin-round-roundevenf128.c: New test.
From-SVN: r274927
Diffstat (limited to 'gcc/real.h')
| -rw-r--r-- | gcc/real.h | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/gcc/real.h b/gcc/real.h index 95b9db83d24..2f41834ecfd 100644 --- a/gcc/real.h +++ b/gcc/real.h @@ -41,11 +41,18 @@ struct GTY(()) real_value { sure they're packed together, otherwise REAL_VALUE_TYPE_SIZE will be miscomputed. */ unsigned int /* ENUM_BITFIELD (real_value_class) */ cl : 2; + /* 1 if number is decimal floating point. */ unsigned int decimal : 1; + /* 1 if number is negative. */ unsigned int sign : 1; + /* 1 if number is signalling. */ unsigned int signalling : 1; + /* 1 if number is canonical + All are generally used for handling cases in real.c. */ unsigned int canonical : 1; + /* unbiased exponent of the number. */ unsigned int uexp : EXP_BITS; + /* significand of the number. */ unsigned long sig[SIGSZ]; }; @@ -500,6 +507,8 @@ extern void real_ceil (REAL_VALUE_TYPE *, format_helper, const REAL_VALUE_TYPE *); extern void real_round (REAL_VALUE_TYPE *, format_helper, const REAL_VALUE_TYPE *); +extern void real_roundeven (REAL_VALUE_TYPE *, format_helper, + const REAL_VALUE_TYPE *); /* Set the sign of R to the sign of X. */ extern void real_copysign (REAL_VALUE_TYPE *, const REAL_VALUE_TYPE *); |