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add FORCE_EVAL macro to evaluate float expr for their side effect

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updated nextafter* to use FORCE_EVAL, it can be used in many other
places in the math code to improve readability.
This commit is contained in:
nsz 2012-05-06 21:24:28 +02:00
commit 6ab8136b44
6 changed files with 25 additions and 24 deletions
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6
src/math/nextafter.c
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@ -29,9 +29,7 @@ double nextafter(double x, double y)
if (e == 0x7ff)
return x + x;
/* raise underflow if ux.value is subnormal or zero */
if (e == 0) {
volatile double z;
z = x*x + ux.value*ux.value;
}
if (e == 0)
FORCE_EVAL(x*x + ux.value*ux.value);
return ux.value;
}

6
src/math/nextafterf.c
View file

@ -28,9 +28,7 @@ float nextafterf(float x, float y)
if (e == 0x7f800000)
return x + x;
/* raise underflow if ux.value is subnormal or zero */
if (e == 0) {
volatile float z;
z = x*x + ux.value*ux.value;
}
if (e == 0)
FORCE_EVAL(x*x + ux.value*ux.value);
return ux.value;
}

12
src/math/nextafterl.c
View file

@ -38,10 +38,8 @@ long double nextafterl(long double x, long double y)
if (ux.bits.exp == 0x7fff)
return x + x;
/* raise underflow if ux.value is subnormal or zero */
if (ux.bits.exp == 0) {
volatile float z;
z = x*x + ux.value*ux.value;
}
if (ux.bits.exp == 0)
FORCE_EVAL(x*x + ux.value*ux.value);
return ux.value;
}
#elif LDBL_MANT_DIG == 113 && LDBL_MAX_EXP == 16384
@ -77,10 +75,8 @@ long double nextafterl(long double x, long double y)
if (ux.bits.exp == 0x7fff)
return x + x;
/* raise underflow if ux.value is subnormal or zero */
if (ux.bits.exp == 0) {
volatile float z;
z = x*x + ux.value*ux.value;
}
if (ux.bits.exp == 0)
FORCE_EVAL(x*x + ux.value*ux.value);
return ux.value;
}
#endif

6
src/math/nexttoward.c
View file

@ -38,10 +38,8 @@ double nexttoward(double x, long double y)
if (e == 0x7ff)
return x + x;
/* raise underflow if ux.value is subnormal or zero */
if (e == 0) {
volatile float z;
z = x*x + ux.value*ux.value;
}
if (e == 0)
FORCE_EVAL(x*x + ux.value*ux.value);
return ux.value;
}
#endif

6
src/math/nexttowardf.c
View file

@ -30,9 +30,7 @@ float nexttowardf(float x, long double y)
if (e == 0x7f800000)
return x + x;
/* raise underflow if ux.value is subnormal or zero */
if (e == 0) {
volatile float z;
z = x*x + ux.value*ux.value;
}
if (e == 0)
FORCE_EVAL(x*x + ux.value*ux.value);
return ux.value;
}