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* math: fix expm1l on x86_64 (avoid underflow for large negative x)Szabolcs Nagy2013-09-051-1/+1
| | | | copy the fix from i386: return -1 instead of exp2l(x)-1 when x <= -65
* x86_64 math asm, long double functions onlyRich Felker2012-03-201-0/+1
this has not been tested heavily, but it's known to at least assemble and run in basic usage cases. it's nearly identical to the corresponding i386 code, and thus expected to be just as correct or just as incorrect.