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Re: [PATCH v2 17/18] Adjust s_ceilf.c and s_ceill.c regarding code style.
On 09/12/2019 09:46, Stefan Liebler wrote:
> This patch just adjusts the generic implementation regarding code style.
> No functional change.
LGTM, thanks.
Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
> ---
> sysdeps/ieee754/flt-32/s_ceilf.c | 54 +++++++++++-------
> sysdeps/ieee754/ldbl-128/s_ceill.c | 91 +++++++++++++++++++-----------
> 2 files changed, 92 insertions(+), 53 deletions(-)
>
> diff --git a/sysdeps/ieee754/flt-32/s_ceilf.c b/sysdeps/ieee754/flt-32/s_ceilf.c
> index 7d4990f3ff..5c4abfe145 100644
> --- a/sysdeps/ieee754/flt-32/s_ceilf.c
> +++ b/sysdeps/ieee754/flt-32/s_ceilf.c
> @@ -20,34 +20,46 @@
> #include <math-use-builtins.h>
>
> float
> -__ceilf(float x)
> +__ceilf (float x)
> {
> #if USE_CEILF_BUILTIN
> return __builtin_ceilf (x);
> #else
> /* Use generic implementation. */
> - int32_t i0,j0;
> - uint32_t i;
> + int32_t i0, j0;
> + uint32_t i;
>
> - GET_FLOAT_WORD(i0,x);
> - j0 = ((i0>>23)&0xff)-0x7f;
> - if(j0<23) {
> - if(j0<0) {
> - /* return 0*sign(x) if |x|<1 */
> - if(i0<0) {i0=0x80000000;}
> - else if(i0!=0) { i0=0x3f800000;}
> - } else {
> - i = (0x007fffff)>>j0;
> - if((i0&i)==0) return x; /* x is integral */
> - if(i0>0) i0 += (0x00800000)>>j0;
> - i0 &= (~i);
> - }
> - } else {
> - if(__builtin_expect(j0==0x80, 0)) return x+x; /* inf or NaN */
> - else return x; /* x is integral */
> + GET_FLOAT_WORD (i0, x);
> + j0 = ((i0 >> 23) & 0xff) - 0x7f;
> + if (j0 < 23)
> + {
> + if (j0 < 0)
> + {
> + /* return 0 * sign (x) if |x| < 1 */
> + if (i0 < 0)
> + i0 = 0x80000000;
> + else if (i0 != 0)
> + i0 = 0x3f800000;
> }
> - SET_FLOAT_WORD(x,i0);
> - return x;
> + else
> + {
> + i = (0x007fffff) >> j0;
> + if ((i0 & i) == 0)
> + return x; /* x is integral */
> + if (i0 > 0)
> + i0 += (0x00800000) >> j0;
> + i0 &= (~i);
> + }
> + }
> + else
> + {
> + if (__glibc_unlikely (j0 == 0x80))
> + return x + x; /* inf or NaN */
> + else
> + return x; /* x is integral */
> + }
> + SET_FLOAT_WORD (x, i0);
> + return x;
> #endif /* ! USE_CEILF_BUILTIN */
> }
> #ifndef __ceilf
Ok.
> diff --git a/sysdeps/ieee754/ldbl-128/s_ceill.c b/sysdeps/ieee754/ldbl-128/s_ceill.c
> index 02ffa7af2b..c5d98e1e37 100644
> --- a/sysdeps/ieee754/ldbl-128/s_ceill.c
> +++ b/sysdeps/ieee754/ldbl-128/s_ceill.c
> @@ -13,7 +13,7 @@
> * ====================================================
> */
>
> -#if defined(LIBM_SCCS) && !defined(lint)
> +#if defined (LIBM_SCCS) && ! defined (lint)
> static char rcsid[] = "$NetBSD: $";
> #endif
>
> @@ -30,45 +30,72 @@ static char rcsid[] = "$NetBSD: $";
> #include <libm-alias-ldouble.h>
> #include <math-use-builtins.h>
>
> -_Float128 __ceill(_Float128 x)
> +_Float128
> +__ceill (_Float128 x)
> {
> #if USE_CEILL_BUILTIN
> return __builtin_ceill (x);
> #else
> /* Use generic implementation. */
> - int64_t i0,i1,j0;
> - uint64_t i,j;
> - GET_LDOUBLE_WORDS64(i0,i1,x);
> - j0 = ((i0>>48)&0x7fff)-0x3fff;
> - if(j0<48) {
> - if(j0<0) {
> - /* return 0*sign(x) if |x|<1 */
> - if(i0<0) {i0=0x8000000000000000ULL;i1=0;}
> - else if((i0|i1)!=0) { i0=0x3fff000000000000ULL;i1=0;}
> - } else {
> - i = (0x0000ffffffffffffULL)>>j0;
> - if(((i0&i)|i1)==0) return x; /* x is integral */
> - if(i0>0) i0 += (0x0001000000000000LL)>>j0;
> - i0 &= (~i); i1=0;
> + int64_t i0, i1, j0;
> + uint64_t i, j;
> + GET_LDOUBLE_WORDS64 (i0, i1, x);
> + j0 = ((i0 >> 48) & 0x7fff) - 0x3fff;
> + if (j0 < 48)
> + {
> + if (j0 < 0)
> + {
> + /* return 0 * sign (x) if |x| < 1 */
> + if (i0 < 0)
> + {
> + i0 = 0x8000000000000000ULL;
> + i1 = 0;
> }
> - } else if (j0>111) {
> - if(j0==0x4000) return x+x; /* inf or NaN */
> - else return x; /* x is integral */
> - } else {
> - i = -1ULL>>(j0-48);
> - if((i1&i)==0) return x; /* x is integral */
> - if(i0>0) {
> - if(j0==48) i0+=1;
> - else {
> - j = i1+(1LL<<(112-j0));
> - if(j<i1) i0 +=1 ; /* got a carry */
> - i1=j;
> - }
> + else if ((i0 | i1) != 0)
> + {
> + i0 = 0x3fff000000000000ULL;
> + i1 = 0;
> }
> - i1 &= (~i);
> }
> - SET_LDOUBLE_WORDS64(x,i0,i1);
> - return x;
> + else
> + {
> + i = (0x0000ffffffffffffULL) >> j0;
> + if (((i0 & i) | i1) == 0)
> + return x; /* x is integral */
> + if (i0 > 0)
> + i0 += (0x0001000000000000LL) >> j0;
> + i0 &= (~i);
> + i1 = 0;
> + }
> + }
> + else if (j0 > 111)
> + {
> + if (j0 == 0x4000)
> + return x + x; /* inf or NaN */
> + else
> + return x; /* x is integral */
> + }
> + else
> + {
> + i = -1ULL >> (j0 - 48);
> + if ((i1 & i) == 0)
> + return x; /* x is integral */
> + if (i0 > 0)
> + {
> + if (j0 == 48)
> + i0 += 1;
> + else
> + {
> + j = i1 + (1LL << (112 - j0));
> + if (j < i1)
> + i0 += 1; /* got a carry */
> + i1 = j;
> + }
> + }
> + i1 &= (~i);
> + }
> + SET_LDOUBLE_WORDS64 (x, i0, i1);
> + return x;
> #endif /* ! USE_CEILL_BUILTIN */
> }
> libm_alias_ldouble (__ceil, ceil)
>
Ok.