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Diffstat (limited to 'sysdeps/ieee754/dbl-64/s_sin.c')
-rw-r--r--sysdeps/ieee754/dbl-64/s_sin.c109
1 files changed, 75 insertions, 34 deletions
diff --git a/sysdeps/ieee754/dbl-64/s_sin.c b/sysdeps/ieee754/dbl-64/s_sin.c
index 5b79854004..32ba66d1a0 100644
--- a/sysdeps/ieee754/dbl-64/s_sin.c
+++ b/sysdeps/ieee754/dbl-64/s_sin.c
@@ -53,6 +53,7 @@
#include "usncs.h"
#include "MathLib.h"
#include "math_private.h"
+#include <fenv.h>
#ifndef SECTION
# define SECTION
@@ -107,12 +108,16 @@ __sin(double x){
#if 0
int4 nn;
#endif
+ fenv_t env;
+ double retval = 0;
+
+ libc_feholdexcept_setround (&env, FE_TONEAREST);
u.x = x;
m = u.i[HIGH_HALF];
k = 0x7fffffff&m; /* no sign */
if (k < 0x3e500000) /* if x->0 =>sin(x)=x */
- return x;
+ { retval = x; goto ret; }
/*---------------------------- 2^-26 < |x|< 0.25 ----------------------*/
else if (k < 0x3fd00000){
xx = x*x;
@@ -120,7 +125,8 @@ __sin(double x){
t = ((((s5.x*xx + s4.x)*xx + s3.x)*xx + s2.x)*xx + s1.x)*(xx*x);
res = x+t;
cor = (x-res)+t;
- return (res == res + 1.07*cor)? res : slow(x);
+ retval = (res == res + 1.07*cor)? res : slow(x);
+ goto ret;
} /* else if (k < 0x3fd00000) */
/*---------------------------- 0.25<|x|< 0.855469---------------------- */
else if (k < 0x3feb6000) {
@@ -137,7 +143,8 @@ __sin(double x){
cor=(ssn+s*ccs-sn*c)+cs*s;
res=sn+cor;
cor=(sn-res)+cor;
- return (res==res+1.096*cor)? res : slow1(x);
+ retval = (res==res+1.096*cor)? res : slow1(x);
+ goto ret;
} /* else if (k < 0x3feb6000) */
/*----------------------- 0.855469 <|x|<2.426265 ----------------------*/
@@ -163,7 +170,8 @@ __sin(double x){
cor=(ccs-s*ssn-cs*c)-sn*s;
res=cs+cor;
cor=(cs-res)+cor;
- return (res==res+1.020*cor)? ((m>0)?res:-res) : slow2(x);
+ retval = (res==res+1.020*cor)? ((m>0)?res:-res) : slow2(x);
+ goto ret;
} /* else if (k < 0x400368fd) */
/*-------------------------- 2.426265<|x|< 105414350 ----------------------*/
@@ -189,7 +197,8 @@ __sin(double x){
res = a+t;
cor = (a-res)+t;
cor = (cor>0)? 1.02*cor+eps : 1.02*cor -eps;
- return (res == res + cor)? res : sloww(a,da,x);
+ retval = (res == res + cor)? res : sloww(a,da,x);
+ goto ret;
}
else {
if (a>0)
@@ -210,7 +219,8 @@ __sin(double x){
res=sn+cor;
cor=(sn-res)+cor;
cor = (cor>0)? 1.035*cor+eps : 1.035*cor-eps;
- return (res==res+cor)? ((m)?res:-res) : sloww1(a,da,x);
+ retval = (res==res+cor)? ((m)?res:-res) : sloww1(a,da,x);
+ goto ret;
}
break;
@@ -232,7 +242,8 @@ __sin(double x){
res=cs+cor;
cor=(cs-res)+cor;
cor = (cor>0)? 1.025*cor+eps : 1.025*cor-eps;
- return (res==res+cor)? ((n&2)?-res:res) : sloww2(a,da,x,n);
+ retval = (res==res+cor)? ((n&2)?-res:res) : sloww2(a,da,x,n);
+ goto ret;
break;
@@ -268,7 +279,8 @@ __sin(double x){
res = a+t;
cor = (a-res)+t;
cor = (cor>0)? 1.02*cor+eps : 1.02*cor -eps;
- return (res == res + cor)? res : bsloww(a,da,x,n);
+ retval = (res == res + cor)? res : bsloww(a,da,x,n);
+ goto ret;
}
else {
if (a>0) {m=1;t=a;db=da;}
@@ -287,7 +299,8 @@ __sin(double x){
res=sn+cor;
cor=(sn-res)+cor;
cor = (cor>0)? 1.035*cor+eps : 1.035*cor-eps;
- return (res==res+cor)? ((m)?res:-res) : bsloww1(a,da,x,n);
+ retval = (res==res+cor)? ((m)?res:-res) : bsloww1(a,da,x,n);
+ goto ret;
}
break;
@@ -309,7 +322,8 @@ __sin(double x){
res=cs+cor;
cor=(cs-res)+cor;
cor = (cor>0)? 1.025*cor+eps : 1.025*cor-eps;
- return (res==res+cor)? ((n&2)?-res:res) : bsloww2(a,da,x,n);
+ retval = (res==res+cor)? ((n&2)?-res:res) : bsloww2(a,da,x,n);
+ goto ret;
break;
@@ -323,17 +337,20 @@ __sin(double x){
n = __branred(x,&a,&da);
switch (n) {
case 0:
- if (a*a < 0.01588) return bsloww(a,da,x,n);
- else return bsloww1(a,da,x,n);
+ if (a*a < 0.01588) retval = bsloww(a,da,x,n);
+ else retval = bsloww1(a,da,x,n);
+ goto ret;
break;
case 2:
- if (a*a < 0.01588) return bsloww(-a,-da,x,n);
- else return bsloww1(-a,-da,x,n);
+ if (a*a < 0.01588) retval = bsloww(-a,-da,x,n);
+ else retval = bsloww1(-a,-da,x,n);
+ goto ret;
break;
case 1:
case 3:
- return bsloww2(a,da,x,n);
+ retval = bsloww2(a,da,x,n);
+ goto ret;
break;
}
@@ -343,9 +360,13 @@ __sin(double x){
else {
if (k == 0x7ff00000 && u.i[LOW_HALF] == 0)
__set_errno (EDOM);
- return x / x;
+ retval = x / x;
+ goto ret;
}
- return 0; /* unreachable */
+
+ ret:
+ libc_feupdateenv (&env);
+ return retval;
}
@@ -362,11 +383,16 @@ __cos(double x)
mynumber u,v;
int4 k,m,n;
+ fenv_t env;
+ double retval = 0;
+
+ libc_feholdexcept_setround (&env, FE_TONEAREST);
+
u.x = x;
m = u.i[HIGH_HALF];
k = 0x7fffffff&m;
- if (k < 0x3e400000 ) return 1.0; /* |x|<2^-27 => cos(x)=1 */
+ if (k < 0x3e400000 ) { retval = 1.0; goto ret; } /* |x|<2^-27 => cos(x)=1 */
else if (k < 0x3feb6000 ) {/* 2^-27 < |x| < 0.855469 */
y=ABS(x);
@@ -383,7 +409,8 @@ __cos(double x)
cor=(ccs-s*ssn-cs*c)-sn*s;
res=cs+cor;
cor=(cs-res)+cor;
- return (res==res+1.020*cor)? res : cslow2(x);
+ retval = (res==res+1.020*cor)? res : cslow2(x);
+ goto ret;
} /* else if (k < 0x3feb6000) */
@@ -397,7 +424,8 @@ __cos(double x)
res = a+t;
cor = (a-res)+t;
cor = (cor>0)? 1.02*cor+1.0e-31 : 1.02*cor -1.0e-31;
- return (res == res + cor)? res : csloww(a,da,x);
+ retval = (res == res + cor)? res : csloww(a,da,x);
+ goto ret;
}
else {
if (a>0) {m=1;t=a;db=da;}
@@ -416,7 +444,8 @@ __cos(double x)
res=sn+cor;
cor=(sn-res)+cor;
cor = (cor>0)? 1.035*cor+1.0e-31 : 1.035*cor-1.0e-31;
- return (res==res+cor)? ((m)?res:-res) : csloww1(a,da,x);
+ retval = (res==res+cor)? ((m)?res:-res) : csloww1(a,da,x);
+ goto ret;
}
} /* else if (k < 0x400368fd) */
@@ -443,7 +472,8 @@ __cos(double x)
res = a+t;
cor = (a-res)+t;
cor = (cor>0)? 1.02*cor+eps : 1.02*cor -eps;
- return (res == res + cor)? res : csloww(a,da,x);
+ retval = (res == res + cor)? res : csloww(a,da,x);
+ goto ret;
}
else {
if (a>0) {m=1;t=a;db=da;}
@@ -462,7 +492,8 @@ __cos(double x)
res=sn+cor;
cor=(sn-res)+cor;
cor = (cor>0)? 1.035*cor+eps : 1.035*cor-eps;
- return (res==res+cor)? ((m)?res:-res) : csloww1(a,da,x);
+ retval = (res==res+cor)? ((m)?res:-res) : csloww1(a,da,x);
+ goto ret;
}
break;
@@ -483,7 +514,8 @@ __cos(double x)
res=cs+cor;
cor=(cs-res)+cor;
cor = (cor>0)? 1.025*cor+eps : 1.025*cor-eps;
- return (res==res+cor)? ((n)?-res:res) : csloww2(a,da,x,n);
+ retval = (res==res+cor)? ((n)?-res:res) : csloww2(a,da,x,n);
+ goto ret;
break;
@@ -518,7 +550,8 @@ __cos(double x)
res = a+t;
cor = (a-res)+t;
cor = (cor>0)? 1.02*cor+eps : 1.02*cor -eps;
- return (res == res + cor)? res : bsloww(a,da,x,n);
+ retval = (res == res + cor)? res : bsloww(a,da,x,n);
+ goto ret;
}
else {
if (a>0) {m=1;t=a;db=da;}
@@ -537,7 +570,8 @@ __cos(double x)
res=sn+cor;
cor=(sn-res)+cor;
cor = (cor>0)? 1.035*cor+eps : 1.035*cor-eps;
- return (res==res+cor)? ((m)?res:-res) : bsloww1(a,da,x,n);
+ retval = (res==res+cor)? ((m)?res:-res) : bsloww1(a,da,x,n);
+ goto ret;
}
break;
@@ -558,7 +592,8 @@ __cos(double x)
res=cs+cor;
cor=(cs-res)+cor;
cor = (cor>0)? 1.025*cor+eps : 1.025*cor-eps;
- return (res==res+cor)? ((n)?-res:res) : bsloww2(a,da,x,n);
+ retval = (res==res+cor)? ((n)?-res:res) : bsloww2(a,da,x,n);
+ goto ret;
break;
}
@@ -570,17 +605,20 @@ __cos(double x)
n = __branred(x,&a,&da);
switch (n) {
case 1:
- if (a*a < 0.01588) return bsloww(-a,-da,x,n);
- else return bsloww1(-a,-da,x,n);
+ if (a*a < 0.01588) retval = bsloww(-a,-da,x,n);
+ else retval = bsloww1(-a,-da,x,n);
+ goto ret;
break;
case 3:
- if (a*a < 0.01588) return bsloww(a,da,x,n);
- else return bsloww1(a,da,x,n);
+ if (a*a < 0.01588) retval = bsloww(a,da,x,n);
+ else retval = bsloww1(a,da,x,n);
+ goto ret;
break;
case 0:
case 2:
- return bsloww2(a,da,x,n);
+ retval = bsloww2(a,da,x,n);
+ goto ret;
break;
}
@@ -592,10 +630,13 @@ __cos(double x)
else {
if (k == 0x7ff00000 && u.i[LOW_HALF] == 0)
__set_errno (EDOM);
- return x / x; /* |x| > 2^1024 */
+ retval = x / x; /* |x| > 2^1024 */
+ goto ret;
}
- return 0;
+ ret:
+ libc_feupdateenv (&env);
+ return retval;
}
/************************************************************************/
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-15 18:48:47 +0000