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| author | Ulrich Drepper <drepper@gmail.com> | 2011-10-12 11:27:51 -0400 |
|---|---|---|
| committer | Ulrich Drepper <drepper@gmail.com> | 2011-10-12 11:27:51 -0400 |
| commit | 0ac5ae2335292908f39031b1ea9fe8edce433c0f (patch) | |
| tree | f9d26c8abc0de39d18d4c13e70f6022cdc6b461f /sysdeps/ieee754/flt-32/e_hypotf.c | |
| parent | a843a204a3e8a0dd53584dad3668771abaec84ac (diff) | |
| download | glibc-0ac5ae2335292908f39031b1ea9fe8edce433c0f.zip glibc-0ac5ae2335292908f39031b1ea9fe8edce433c0f.tar.gz glibc-0ac5ae2335292908f39031b1ea9fe8edce433c0f.tar.bz2 | |
Optimize libm
libm is now somewhat integrated with gcc's -ffinite-math-only option
and lots of the wrapper functions have been optimized.
Diffstat (limited to 'sysdeps/ieee754/flt-32/e_hypotf.c')
| -rw-r--r-- | sysdeps/ieee754/flt-32/e_hypotf.c | 21 |
1 files changed, 7 insertions, 14 deletions
diff --git a/sysdeps/ieee754/flt-32/e_hypotf.c b/sysdeps/ieee754/flt-32/e_hypotf.c index a8e1a52..7ec8ae6 100644 --- a/sysdeps/ieee754/flt-32/e_hypotf.c +++ b/sysdeps/ieee754/flt-32/e_hypotf.c @@ -13,19 +13,11 @@ * ==================================================== */ -#if defined(LIBM_SCCS) && !defined(lint) -static char rcsid[] = "$NetBSD: e_hypotf.c,v 1.5 1995/05/12 04:57:30 jtc Exp $"; -#endif - #include "math.h" #include "math_private.h" -#ifdef __STDC__ - float __ieee754_hypotf(float x, float y) -#else - float __ieee754_hypotf(x,y) - float x, y; -#endif +float +__ieee754_hypotf(float x, float y) { float a,b,t1,t2,y1,y2,w; int32_t j,k,ha,hb; @@ -39,7 +31,7 @@ static char rcsid[] = "$NetBSD: e_hypotf.c,v 1.5 1995/05/12 04:57:30 jtc Exp $"; SET_FLOAT_WORD(b,hb); /* b <- |b| */ if((ha-hb)>0xf000000) {return a+b;} /* x/y > 2**30 */ k=0; - if(ha > 0x58800000) { /* a>2**50 */ + if(__builtin_expect(ha > 0x58800000, 0)) { /* a>2**50 */ if(ha >= 0x7f800000) { /* Inf or NaN */ w = a+b; /* for sNaN */ if(ha == 0x7f800000) w = a; @@ -51,15 +43,15 @@ static char rcsid[] = "$NetBSD: e_hypotf.c,v 1.5 1995/05/12 04:57:30 jtc Exp $"; SET_FLOAT_WORD(a,ha); SET_FLOAT_WORD(b,hb); } - if(hb < 0x26800000) { /* b < 2**-50 */ + if(__builtin_expect(hb < 0x26800000, 0)) { /* b < 2**-50 */ if(hb <= 0x007fffff) { /* subnormal b or 0 */ - if(hb==0) return a; + if(hb==0) return a; SET_FLOAT_WORD(t1,0x7e800000); /* t1=2^126 */ b *= t1; a *= t1; k -= 126; } else { /* scale a and b by 2^60 */ - ha += 0x1e000000; /* a *= 2^60 */ + ha += 0x1e000000; /* a *= 2^60 */ hb += 0x1e000000; /* b *= 2^60 */ k -= 60; SET_FLOAT_WORD(a,ha); @@ -85,3 +77,4 @@ static char rcsid[] = "$NetBSD: e_hypotf.c,v 1.5 1995/05/12 04:57:30 jtc Exp $"; return t1*w; } else return w; } +strong_alias (__ieee754_hypotf, __hypotf_finite) |