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libm/math: Make yx functions set errno=ERANGE for x=0 

The y0, y1 and yn functions need separate conditions when x is zero as
that returns ERANGE instead of EDOM.

Also stop adjusting the return value from the __ieee754_y* functions
as that is already correct and we were just breaking it.

Signed-off-by: Keith Packard <keithp@keithp.com>
This commit is contained in:
Keith Packard via Newlib 2020-08-04 15:22:21 -07:00 committed by Corinna Vinschen
parent 905aa4c013
commit 2eafcc78df
6 changed files with 52 additions and 42 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

14
newlib/libm/math/w_j0.c
View File

@ -128,17 +128,19 @@ None of the Bessel functions are in ANSI C.
double z;
z = __ieee754_y0(x);
if(_LIB_VERSION == _IEEE_ || isnan(x) ) return z;
if(x <= 0.0){
/* y0(0) = -inf or y0(x<0) = NaN */
if(x < 0.0){
/* y0(x<0) = NaN */
errno = EDOM;
return -HUGE_VAL;
}
if(x == 0.0){
/* y0(0) = -inf */
errno = ERANGE;
}
if(x>X_TLOSS) {
/* y0(x>X_TLOSS) */
errno = ERANGE;
return 0.0;
} else
return z;
}
return z;
#endif
}

14
newlib/libm/math/w_j1.c
View File

@ -55,17 +55,19 @@
double z;
z = __ieee754_y1(x);
if(_LIB_VERSION == _IEEE_ || isnan(x) ) return z;
if(x <= 0.0){
/* y1(0) = -inf or y1(x<0) = NaN */
if(x < 0.0){
/* y1(x<0) = NaN */
errno = EDOM;
return -HUGE_VAL;
}
if(x == 0.0){
/* y1(0) = -inf */
errno = ERANGE;
}
if(x>X_TLOSS) {
/* y1(x>X_TLOSS) */
errno = ERANGE;
return 0.0;
} else
return z;
}
return z;
#endif
}

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

@ -77,17 +77,19 @@
double z;
z = __ieee754_yn(n,x);
if(_LIB_VERSION == _IEEE_ || isnan(x) ) return z;
if(x <= 0.0){
/* yn(n,0) = -inf or yn(x<0) = NaN */
if(x < 0.0){
/* yn(x<0) = NaN */
errno = EDOM;
return -HUGE_VAL;
}
if(x == 0.0){
/* yn(0) = -inf */
errno = ERANGE;
}
if(x>X_TLOSS) {
/* yn(x>X_TLOSS) */
errno = ERANGE;
return 0.0;
} else
return z;
}
return z;
#endif
}

19
newlib/libm/math/wf_j0.c
View File

@ -35,9 +35,8 @@
if(fabsf(x)>(float)X_TLOSS) {
/* j0f(|x|>X_TLOSS) */
errno = ERANGE;
return 0.0f;
} else
return z;
}
return z;
#endif
}
@ -54,17 +53,19 @@
float z;
z = __ieee754_y0f(x);
if(_LIB_VERSION == _IEEE_ || isnan(x) ) return z;
if(x <= (float)0.0){
/* y0f(0) = -inf or y0f(x<0) = NaN */
if(x < 0.0f){
/* y0f(x<0) = NaN */
errno = EDOM;
return -HUGE_VALF;
}
if (x == 0.0f){
/* y0f(n,0) = -inf */
errno = ERANGE;
}
if(x>(float)X_TLOSS) {
/* y0f(x>X_TLOSS) */
errno = ERANGE;
return 0.0f;
} else
return z;
}
return z;
#endif
}

14
newlib/libm/math/wf_j1.c
View File

@ -56,17 +56,19 @@
float z;
z = __ieee754_y1f(x);
if(_LIB_VERSION == _IEEE_ || isnan(x) ) return z;
if(x <= 0.0f){
/* y1f(0) = -inf or y1f(x<0) = NaN */
if(x < 0.0f){
/* y1f(x<0) = NaN */
errno = EDOM;
return -HUGE_VALF;
}
if (x == 0.0f){
/* y1f(n,0) = -inf */
errno = ERANGE;
}
if(x>(float)X_TLOSS) {
/* y1f(x>X_TLOSS) */
errno = ERANGE;
return 0.0f;
} else
return z;
}
return z;
#endif
}

19
newlib/libm/math/wf_jn.c
View File

@ -33,9 +33,8 @@
if(fabsf(x)>(float)X_TLOSS) {
/* jnf(|x|>X_TLOSS) */
errno = ERANGE;
return 0.0f;
} else
return z;
}
return z;
#endif
}
@ -52,17 +51,19 @@
float z;
z = __ieee754_ynf(n,x);
if(_LIB_VERSION == _IEEE_ || isnan(x) ) return z;
if(x <= 0.0f){
/* ynf(n,0) = -inf or ynf(x<0) = NaN */
if(x < 0.0f){
/* ynf(x<0) = NaN */
errno = EDOM;
return -HUGE_VALF;
}
if (x == 0.0f){
/* ynf(n,0) = -inf */
errno = ERANGE;
}
if(x>(float)X_TLOSS) {
/* ynf(x>X_TLOSS) */
errno = ERANGE;
return 0.0f;
} else
return z;
}
return z;
#endif
}