Difference between revisions of "Talk:Ieee arithmetic"
m (Added a note to use macros instead of functions) |
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Does it affect the benchmarks? | Does it affect the benchmarks? | ||
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| + | == Not IEEE arithmetic, nor maths == | ||
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| + | NaN = NaN is never true. | ||
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| + | And placing NaNs in a sort order isn't write either - REAL_32/64 are not totally ordered types. | ||
| + | --[[User:Colin-adams|Colin-adams]] 14:48, 3 February 2010 (UTC) | ||
Revision as of 06:48, 3 February 2010
Most probably C compilers inline functions, but just to be sure, I'd convert them into the macros:
#define to_raw_bits(d) *((EIF_NATURAL_64*)&(d)) #define eif_is_nan_bits(value) ((value & ~RTU64C(0x8000000000000000)) > RTU64C(0x7ff0000000000000)) #define eif_is_nan(v) ((*((EIF_NATURAL_64 *)&(v)) & ~RTU64C(0x8000000000000000)) > RTU64C(0x7ff0000000000000))
Does it affect the benchmarks?
Not IEEE arithmetic, nor maths
NaN = NaN is never true.
And placing NaNs in a sort order isn't write either - REAL_32/64 are not totally ordered types. --Colin-adams 14:48, 3 February 2010 (UTC)
