diff options
Diffstat (limited to 'gcc/real.h')
| -rw-r--r-- | gcc/real.h | 18 |
1 files changed, 18 insertions, 0 deletions
@@ -161,6 +161,19 @@ struct real_format bool has_signed_zero; bool qnan_msb_set; bool canonical_nan_lsbs_set; + + /* This flag indicates whether the format is suitable for the optimized + code paths for the __builtin_fpclassify function and friends. For + this, the format must be a base 2 representation with the sign bit as + the most-significant bit followed by (exp <= 32) exponent bits + followed by the mantissa bits. It must be possible to interpret the + bits of the floating-point representation as an integer. NaNs and + INFs (if available) must be represented by the same schema used by + IEEE 754. (NaNs must be represented by an exponent with all bits 1, + any mantissa except all bits 0 and any sign bit. +INF and -INF must be + represented by an exponent with all bits 1, a mantissa with all bits 0 and + a sign bit of 0 and 1 respectively.) */ + bool is_binary_ieee_compatible; const char *name; }; @@ -511,6 +524,11 @@ extern bool real_isinteger (const REAL_VALUE_TYPE *, HOST_WIDE_INT *); float string. BUF must be large enough to contain the result. */ extern void get_max_float (const struct real_format *, char *, size_t); +/* Write into BUF the smallest positive normalized number x, + such that b**(x-1) is normalized. BUF must be large enough + to contain the result. */ +extern void get_min_float (const struct real_format *, char *, size_t); + #ifndef GENERATOR_FILE /* real related routines. */ extern wide_int real_to_integer (const REAL_VALUE_TYPE *, bool *, int); |