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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/ldbl-128ibm/e_fmodl.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/ldbl-128ibm/e_fmodl.c')
| -rw-r--r-- | sysdeps/ieee754/ldbl-128ibm/e_fmodl.c | 31 |
1 files changed, 12 insertions, 19 deletions
diff --git a/sysdeps/ieee754/ldbl-128ibm/e_fmodl.c b/sysdeps/ieee754/ldbl-128ibm/e_fmodl.c index e99b0ba..4ad59a0 100644 --- a/sysdeps/ieee754/ldbl-128ibm/e_fmodl.c +++ b/sysdeps/ieee754/ldbl-128ibm/e_fmodl.c @@ -22,18 +22,10 @@ #include "math_private.h" #include <ieee754.h> -#ifdef __STDC__ static const long double one = 1.0, Zero[] = {0.0, -0.0,}; -#else -static long double one = 1.0, Zero[] = {0.0, -0.0,}; -#endif -#ifdef __STDC__ - long double __ieee754_fmodl(long double x, long double y) -#else - long double __ieee754_fmodl(x,y) - long double x,y; -#endif +long double +__ieee754_fmodl (long double x, long double y) { int64_t n,hx,hy,hz,ix,iy,sx,i; u_int64_t lx,ly,lz; @@ -76,8 +68,8 @@ static long double one = 1.0, Zero[] = {0.0, -0.0,}; /* Make the IBM extended format 105 bit mantissa look like the ieee854 112 bit mantissa so the following operatations will give the correct result. */ - ldbl_extract_mantissa(&hx, &lx, &temp, x); - ldbl_extract_mantissa(&hy, &ly, &temp, y); + ldbl_extract_mantissa(&hx, &lx, &temp, x); + ldbl_extract_mantissa(&hy, &ly, &temp, y); /* set up {hx,lx}, {hy,ly} and align y to x */ if(ix >= -1022) @@ -85,8 +77,8 @@ static long double one = 1.0, Zero[] = {0.0, -0.0,}; else { /* subnormal x, shift x to normal */ n = -1022-ix; if(n<=63) { - hx = (hx<<n)|(lx>>(64-n)); - lx <<= n; + hx = (hx<<n)|(lx>>(64-n)); + lx <<= n; } else { hx = lx<<(n-64); lx = 0; @@ -97,8 +89,8 @@ static long double one = 1.0, Zero[] = {0.0, -0.0,}; else { /* subnormal y, shift y to normal */ n = -1022-iy; if(n<=63) { - hy = (hy<<n)|(ly>>(64-n)); - ly <<= n; + hy = (hy<<n)|(ly>>(64-n)); + ly <<= n; } else { hy = ly<<(n-64); ly = 0; @@ -111,16 +103,16 @@ static long double one = 1.0, Zero[] = {0.0, -0.0,}; hz=hx-hy;lz=lx-ly; if(lx<ly) hz -= 1; if(hz<0){hx = hx+hx+(lx>>63); lx = lx+lx;} else { - if((hz|(lz&0x7fffffffffffffff))==0) /* return sign(x)*0 */ + if((hz|(lz&0x7fffffffffffffff))==0) /* return sign(x)*0 */ return Zero[(u_int64_t)sx>>63]; - hx = hz+hz+(lz>>63); lx = lz+lz; + hx = hz+hz+(lz>>63); lx = lz+lz; } } hz=hx-hy;lz=lx-ly; if(lx<ly) hz -= 1; if(hz>=0) {hx=hz;lx=lz;} /* convert back to floating value and restore the sign */ - if((hx|(lx&0x7fffffffffffffff))==0) /* return sign(x)*0 */ + if((hx|(lx&0x7fffffffffffffff))==0) /* return sign(x)*0 */ return Zero[(u_int64_t)sx>>63]; while(hx<0x0001000000000000LL) { /* normalize x */ hx = hx+hx+(lx>>63); lx = lx+lx; @@ -143,3 +135,4 @@ static long double one = 1.0, Zero[] = {0.0, -0.0,}; } return x; /* exact output */ } +strong_alias (__ieee754_fmodl, __fmodl_finite) |