archive/ruby
1
0
Fork 0
mirror of https://github.com/ruby/ruby.git synced 2025-08-15 13:39:04 +02:00
Code Issues Projects Releases Packages Wiki Activity Actions 4

Align RFloat at VALUE boundary

Browse source
This commit is contained in:
Nobuyoshi Nakada 2021-10-26 23:39:43 +09:00
parent afdca0e780
commit e3a783b141
Notes: git 2021-10-27 02:05:34 +09:00
3 changed files with 27 additions and 19 deletions
Download patch file Download diff file Expand all files Collapse all files

27
internal/numeric.h
View file

@ -35,9 +35,18 @@ enum ruby_num_rounding_mode {
RUBY_NUM_ROUND_DEFAULT = ROUND_DEFAULT,
};
#if SIZEOF_DOUBLE < SIZEOF_VALUE
typedef double rb_float_value_type;
#else
typedef struct {
VALUE values[(SIZEOF_DOUBLE + SIZEOF_VALUE - 1) / SIZEOF_VALUE];
/* roomof() needs internal.h, and the order of some macros may matter */
} rb_float_value_type;
#endif
struct RFloat {
struct RBasic basic;
double float_value;
rb_float_value_type float_value;
};
#define RFLOAT(obj) ((struct RFloat *)(obj))
@ -206,21 +215,17 @@ rb_float_flonum_value(VALUE v)
return 0.0;
}
#if SIZEOF_VALUE >= SIZEOF_DOUBLE || defined(UNALIGNED_WORD_ACCESS)
# define UNALIGNED_DOUBLE_ACCESS 1
#else
# define UNALIGNED_DOUBLE_ACCESS 0
#endif
static inline double
rb_float_noflonum_value(VALUE v)
{
#if UNALIGNED_DOUBLE_ACCESS
#if SIZEOF_DOUBLE < SIZEOF_VALUE
return RFLOAT(v)->float_value;
#else
double d;
memcpy(&d, &RFLOAT(v)->float_value, sizeof(double));
return d;
union {
rb_float_value_type v;
double d;
} u = {RFLOAT(v)->float_value};
return u.d;
#endif
}