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Issue #1291 - Part 2: Stop using the lib's sqrt() function

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Use <cmath>'s functions over fdlibm's for performance reasons.
No significant precision loss when doing this.
This commit is contained in:
wolfbeast 2019-11-15 14:00:18 +01:00 • committed by Roy Tam
commit b6c0bdd7da
10 changed files with 17 additions and 459 deletions
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3
modules/fdlibm/src/e_asin.cpp
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@ -44,6 +44,7 @@
*
*/
#include <cmath>
#include <float.h>
#include "math_private.h"
@ -95,7 +96,7 @@ __ieee754_asin(double x)
t = w*0.5;
p = t*(pS0+t*(pS1+t*(pS2+t*(pS3+t*(pS4+t*pS5)))));
q = one+t*(qS1+t*(qS2+t*(qS3+t*qS4)));
s = sqrt(t);
s = std::sqrt(t);
if(ix>=0x3FEF3333) { /* if |x| > 0.975 */
w = p/q;
t = pio2_hi-(2.0*(s+s*w)-pio2_lo);