JehanneOS
/
newlib
1
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

libm/math: Don't modify __ieee754_pow return values in pow 

The __ieee754 functions already return the right value in exception
cases, so don't modify those. Setting the library to _POSIX_/_IEEE_
mode now only affects whether errno is modified.

Signed-off-by: Keith Packard <keithp@keithp.com>
This commit is contained in:
Keith Packard via Newlib 2020-08-04 15:22:23 -07:00 committed by Corinna Vinschen
parent 98a4f8de47
commit e108d04432
2 changed files with 2 additions and 26 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

14
newlib/libm/math/w_pow.c
View File

@ -68,14 +68,6 @@ PORTABILITY
double z; double z;
z=__ieee754_pow(x,y); z=__ieee754_pow(x,y);
if(_LIB_VERSION == _IEEE_|| isnan(y)) return z; if(_LIB_VERSION == _IEEE_|| isnan(y)) return z;
if(isnan(x)) {
if(y==0.0) {
/* pow(NaN,0.0) */
/* Not an error. */
return 1.0;
} else
return z;
}
if(x==0.0){ if(x==0.0){
if(y==0.0) { if(y==0.0) {
/* pow(0.0,0.0) */ /* pow(0.0,0.0) */
@ -93,20 +85,16 @@ PORTABILITY
if(isnan(z)) { if(isnan(z)) {
/* neg**non-integral */ /* neg**non-integral */
errno = EDOM; errno = EDOM;
return 0.0/0.0;
} else { } else {
/* pow(x,y) overflow */ /* pow(x,y) overflow */
errno = ERANGE; errno = ERANGE;
if(x<0.0&&rint(y)!=y)
return -HUGE_VAL;
return HUGE_VAL;
} }
return z;
} }
} }
if(z==0.0&&finite(x)&&finite(y)) { if(z==0.0&&finite(x)&&finite(y)) {
/* pow(x,y) underflow */ /* pow(x,y) underflow */
errno = ERANGE; errno = ERANGE;
return 0.0;
} }
return z; return z;
#endif #endif

14
newlib/libm/math/wf_pow.c
View File

@ -34,14 +34,6 @@
float z; float z;
z=__ieee754_powf(x,y); z=__ieee754_powf(x,y);
if(_LIB_VERSION == _IEEE_|| isnan(y)) return z; if(_LIB_VERSION == _IEEE_|| isnan(y)) return z;
if(isnan(x)) {
if(y==0.0f) {
/* powf(NaN,0.0) */
/* Not an error. */
return 1.0f;
} else
return z;
}
if(x==0.0f){ if(x==0.0f){
if(y==0.0f) { if(y==0.0f) {
/* powf(0.0,0.0) */ /* powf(0.0,0.0) */
@ -61,20 +53,16 @@
errno = EDOM; errno = EDOM;
/* Use a float divide, to avoid a soft-float double /* Use a float divide, to avoid a soft-float double
divide call on single-float only targets. */ divide call on single-float only targets. */
return 0.0f/0.0f;
} else { } else {
/* powf(x,y) overflow */ /* powf(x,y) overflow */
errno = ERANGE; errno = ERANGE;
if(x<0.0f&&rintf(y)!=y)
return -HUGE_VALF;
return HUGE_VALF;
} }
return z;
} }
} }
if(z==0.0f&&finitef(x)&&finitef(y)) { if(z==0.0f&&finitef(x)&&finitef(y)) {
/* powf(x,y) underflow */ /* powf(x,y) underflow */
errno = ERANGE; errno = ERANGE;
return 0.0f;
} }
return z; return z;
#endif #endif