mirror of
https://github.com/nzp-team/dquakeplus.git
synced 2024-12-12 05:02:13 +00:00
20 lines
471 B
C
20 lines
471 B
C
#include "pspmath.h"
|
|
|
|
float vfpu_tanhf(float x) {
|
|
float result;
|
|
//y = exp(x+x);
|
|
//return (y-1)/(y+1);
|
|
__asm__ volatile (
|
|
"mtv %0, S000\n"
|
|
"vadd.s S000, S000, S000\n"
|
|
"vcst.s S001, VFPU_LN2\n"
|
|
"vrcp.s S001, S001\n"
|
|
"vmul.s S000, S000, S001\n"
|
|
"vexp2.s S000, S000\n"
|
|
"vone.s S001\n"
|
|
"vbfy1.p C002, C000\n"
|
|
"vdiv.s S000, S003, S002\n"
|
|
"mfv %0, S000\n"
|
|
: "=r"(result): "r"(x));
|
|
return result;
|
|
}
|