tmp/tmpdb_dcfra/{from.md → to.md}
RENAMED
|
@@ -0,0 +1,47 @@
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| 1 |
+
### Floating-point type properties <a id="fp.style">[[fp.style]]</a>
|
| 2 |
+
|
| 3 |
+
#### Type `float_round_style` <a id="round.style">[[round.style]]</a>
|
| 4 |
+
|
| 5 |
+
``` cpp
|
| 6 |
+
namespace std {
|
| 7 |
+
enum float_round_style {
|
| 8 |
+
round_indeterminate = -1,
|
| 9 |
+
round_toward_zero = 0,
|
| 10 |
+
round_to_nearest = 1,
|
| 11 |
+
round_toward_infinity = 2,
|
| 12 |
+
round_toward_neg_infinity = 3
|
| 13 |
+
};
|
| 14 |
+
}
|
| 15 |
+
```
|
| 16 |
+
|
| 17 |
+
The rounding mode for floating-point arithmetic is characterized by the
|
| 18 |
+
values:
|
| 19 |
+
|
| 20 |
+
- `round_indeterminate` if the rounding style is indeterminable
|
| 21 |
+
- `round_toward_zero` if the rounding style is toward zero
|
| 22 |
+
- `round_to_nearest` if the rounding style is to the nearest
|
| 23 |
+
representable value
|
| 24 |
+
- `round_toward_infinity` if the rounding style is toward infinity
|
| 25 |
+
- `round_toward_neg_infinity` if the rounding style is toward negative
|
| 26 |
+
infinity
|
| 27 |
+
|
| 28 |
+
#### Type `float_denorm_style` <a id="denorm.style">[[denorm.style]]</a>
|
| 29 |
+
|
| 30 |
+
``` cpp
|
| 31 |
+
namespace std {
|
| 32 |
+
enum float_denorm_style {
|
| 33 |
+
denorm_indeterminate = -1,
|
| 34 |
+
denorm_absent = 0,
|
| 35 |
+
denorm_present = 1
|
| 36 |
+
};
|
| 37 |
+
}
|
| 38 |
+
```
|
| 39 |
+
|
| 40 |
+
The presence or absence of subnormal numbers (variable number of
|
| 41 |
+
exponent bits) is characterized by the values:
|
| 42 |
+
|
| 43 |
+
- `denorm_indeterminate` if it cannot be determined whether or not the
|
| 44 |
+
type allows subnormal values
|
| 45 |
+
- `denorm_absent` if the type does not allow subnormal values
|
| 46 |
+
- `denorm_present` if the type does allow subnormal values
|
| 47 |
+
|