From patchwork Thu Mar 15 18:27:45 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Joseph Myers X-Patchwork-Id: 26326 Received: (qmail 65950 invoked by alias); 15 Mar 2018 18:27:54 -0000 Mailing-List: contact libc-alpha-help@sourceware.org; run by ezmlm Precedence: bulk List-Id: List-Unsubscribe: List-Subscribe: List-Archive: List-Post: List-Help: , Sender: libc-alpha-owner@sourceware.org Delivered-To: mailing list libc-alpha@sourceware.org Received: (qmail 65933 invoked by uid 89); 15 Mar 2018 18:27:53 -0000 Authentication-Results: sourceware.org; auth=none X-Virus-Found: No X-Spam-SWARE-Status: No, score=-24.5 required=5.0 tests=AWL, BAYES_00, GIT_PATCH_0, GIT_PATCH_1, GIT_PATCH_2, GIT_PATCH_3, RCVD_IN_DNSWL_NONE, SPF_PASS, URIBL_RED autolearn=ham version=3.3.2 spammy= X-HELO: relay1.mentorg.com Date: Thu, 15 Mar 2018 18:27:45 +0000 From: Joseph Myers To: Subject: Remove more old-compilers parts of sysdeps/x86/fpu/bits/mathinline.h [committed] Message-ID: User-Agent: Alpine 2.20 (DEB 67 2015-01-07) MIME-Version: 1.0 X-ClientProxiedBy: svr-ies-mbx-01.mgc.mentorg.com (139.181.222.1) To svr-ies-mbx-01.mgc.mentorg.com (139.181.222.1) This patch removes further parts of sysdeps/x86/fpu/bits/mathinline.h that are only of value for optimization with older compiler versions, in accordance with general principles of preferring to let the compiler deal with such inlining through built-in functions. In general, GCC supports inlining all these functions as of version 4.3 or earlier. However, some inlines in GCC may have had excessively restrictive conditions in past GCC versions (e.g. requiring -ffast-math when the inline is valid under broader conditions). (In particular, GCC had, before GCC 7, unnecessarily restrictive conditions on when it could apply floor and ceil inlines corresponding to the ones removed here. The same was true for rint, but bits/mathinline.h *also* was excessively restrictive there.) The removed sincos inlines are for __sincos etc. functions (not a public interface and not currently used in this header either; not in a part of the header ever used for building glibc itself). Likewise, the atan2 inlines included one for __atan2l, also not a public interface and not used for building glibc itself (calls inside glibc generally use __ieee754_atan2l, for which there is a separate __LIBC_INTERNAL_MATH_INLINES case in this header). Tested for x86_64 and x86. Committed. 2018-03-15 Joseph Myers * sysdeps/x86/fpu/bits/mathinline.h [__FAST_MATH__] (__sincos_code): Remove define and undefine. [__FAST_MATH__] (__sincos): Remove inline function. [__FAST_MATH__] (__sincosf): Remove inline function. [__FAST_MATH__] (__sincosl): Remove inline function. (__atan2l): Remove inline functions. [!__GNUC_PREREQ (3, 4)] (__atan2_code): Remove macro. [!__GNUC_PREREQ (3, 4) && __FAST_MATH__] (atan2): Remove inline function. (floor): Remove inline function. (ceil): Likewise. [__FAST_MATH__] (__ldexp_code): Remove macro. [__FAST_MATH__] (ldexp): Remove inline function. [__FAST_MATH__ && __USE_ISOC99] (ldexpf): Likewise. [__FAST_MATH__ && __USE_ISOC99] (ldexpl): Likewise. [__FAST_MATH__ && __USE_ISOC99] (rint): Likewise. [__USE_ISOC99] (__lrint_code): Remove macro. [__USE_ISOC99] (__llrint_code): Likewise. [__USE_ISOC99] (lrintf): Remove inline function. [__USE_ISOC99] (lrint): Likewise. [__USE_ISOC99] (lrintl): Likewise. [__USE_ISOC99] (llrint): Likewise. [__USE_ISOC99] (llrintf): Likewise. [__USE_ISOC99] (llrintl): Likewise. diff --git a/sysdeps/x86/fpu/bits/mathinline.h b/sysdeps/x86/fpu/bits/mathinline.h index 061f62e..d475e16 100644 --- a/sysdeps/x86/fpu/bits/mathinline.h +++ b/sysdeps/x86/fpu/bits/mathinline.h @@ -174,50 +174,6 @@ /* __FAST_MATH__ is defined by gcc -ffast-math. */ # ifdef __FAST_MATH__ -# ifdef __USE_GNU -# define __sincos_code \ - register long double __cosr; \ - register long double __sinr; \ - register unsigned int __swtmp; \ - __asm __volatile__ \ - ("fsincos\n\t" \ - "fnstsw %w2\n\t" \ - "testl $0x400, %2\n\t" \ - "jz 1f\n\t" \ - "fldpi\n\t" \ - "fadd %%st(0)\n\t" \ - "fxch %%st(1)\n\t" \ - "2: fprem1\n\t" \ - "fnstsw %w2\n\t" \ - "testl $0x400, %2\n\t" \ - "jnz 2b\n\t" \ - "fstp %%st(1)\n\t" \ - "fsincos\n\t" \ - "1:" \ - : "=t" (__cosr), "=u" (__sinr), "=a" (__swtmp) : "0" (__x)); \ - *__sinx = __sinr; \ - *__cosx = __cosr - -__MATH_INLINE void -__NTH (__sincos (double __x, double *__sinx, double *__cosx)) -{ - __sincos_code; -} - -__MATH_INLINE void -__NTH (__sincosf (float __x, float *__sinx, float *__cosx)) -{ - __sincos_code; -} - -__MATH_INLINE void -__NTH (__sincosl (long double __x, long double *__sinx, long double *__cosx)) -{ - __sincos_code; -} -# endif - - /* Optimized inline implementation, sometimes with reduced precision and/or argument range. */ @@ -276,23 +232,6 @@ __inline_mathcodeNP_ (long double, __expl, __x, __exp_code) # endif /* __FAST_MATH__ */ -# if __GNUC_PREREQ (3, 4) -__inline_mathcodeNP2_ (long double, __atan2l, __y, __x, - return __builtin_atan2l (__y, __x)) -# else -# define __atan2_code \ - register long double __value; \ - __asm __volatile__ \ - ("fpatan" \ - : "=t" (__value) : "0" (__x), "u" (__y) : "st(1)"); \ - return __value -# ifdef __FAST_MATH__ -__inline_mathcodeNP2 (atan2, __y, __x, __atan2_code) -# endif -__inline_mathcodeNP2_ (long double, __atan2l, __y, __x, __atan2_code) -# endif - - # ifdef __FAST_MATH__ # if !__GNUC_PREREQ (3,3) __inline_mathopNP (sqrt, "fsqrt") @@ -339,57 +278,6 @@ __inline_mathcodeNP (tanh, __x, \ return __exm1 / (__exm1 + 2.0) * __sgn1l (-__x)) # endif -__inline_mathcodeNP (floor, __x, \ - register long double __value; \ - register int __ignore; \ - unsigned short int __cw; \ - unsigned short int __cwtmp; \ - __asm __volatile ("fnstcw %3\n\t" \ - "movzwl %3, %1\n\t" \ - "andl $0xf3ff, %1\n\t" \ - "orl $0x0400, %1\n\t" /* rounding down */ \ - "movw %w1, %2\n\t" \ - "fldcw %2\n\t" \ - "frndint\n\t" \ - "fldcw %3" \ - : "=t" (__value), "=&q" (__ignore), "=m" (__cwtmp), \ - "=m" (__cw) \ - : "0" (__x)); \ - return __value) - -__inline_mathcodeNP (ceil, __x, \ - register long double __value; \ - register int __ignore; \ - unsigned short int __cw; \ - unsigned short int __cwtmp; \ - __asm __volatile ("fnstcw %3\n\t" \ - "movzwl %3, %1\n\t" \ - "andl $0xf3ff, %1\n\t" \ - "orl $0x0800, %1\n\t" /* rounding up */ \ - "movw %w1, %2\n\t" \ - "fldcw %2\n\t" \ - "frndint\n\t" \ - "fldcw %3" \ - : "=t" (__value), "=&q" (__ignore), "=m" (__cwtmp), \ - "=m" (__cw) \ - : "0" (__x)); \ - return __value) - -# ifdef __FAST_MATH__ -# define __ldexp_code \ - register long double __value; \ - __asm __volatile__ \ - ("fscale" \ - : "=t" (__value) : "0" (__x), "u" ((long double) __y)); \ - return __value - -__MATH_INLINE double -__NTH (ldexp (double __x, int __y)) -{ - __ldexp_code; -} -# endif - /* Optimized versions for some non-standardized functions. */ # ifdef __USE_ISOC99 @@ -417,75 +305,6 @@ __inline_mathcodeNP2 (hypot, __x, __y, # endif # endif -# ifdef __USE_ISOC99 -# ifdef __FAST_MATH__ - -__MATH_INLINE float -__NTH (ldexpf (float __x, int __y)) -{ - __ldexp_code; -} - -__MATH_INLINE long double -__NTH (ldexpl (long double __x, int __y)) -{ - __ldexp_code; -} - -__inline_mathopNP (rint, "frndint") -# endif /* __FAST_MATH__ */ - -# define __lrint_code \ - long int __lrintres; \ - __asm__ __volatile__ \ - ("fistpl %0" \ - : "=m" (__lrintres) : "t" (__x) : "st"); \ - return __lrintres -__MATH_INLINE long int -__NTH (lrintf (float __x)) -{ - __lrint_code; -} -__MATH_INLINE long int -__NTH (lrint (double __x)) -{ - __lrint_code; -} -__MATH_INLINE long int -__NTH (lrintl (long double __x)) -{ - __lrint_code; -} -# undef __lrint_code - -# define __llrint_code \ - long long int __llrintres; \ - __asm__ __volatile__ \ - ("fistpll %0" \ - : "=m" (__llrintres) : "t" (__x) : "st"); \ - return __llrintres -__extension__ -__MATH_INLINE long long int -__NTH (llrintf (float __x)) -{ - __llrint_code; -} -__extension__ -__MATH_INLINE long long int -__NTH (llrint (double __x)) -{ - __llrint_code; -} -__extension__ -__MATH_INLINE long long int -__NTH (llrintl (long double __x)) -{ - __llrint_code; -} -# undef __llrint_code - -# endif - # ifdef __USE_MISC @@ -501,11 +320,9 @@ __NTH (__finite (double __x)) # endif /* __USE_MISC */ /* Undefine some of the large macros which are not used anymore. */ -# undef __atan2_code # ifdef __FAST_MATH__ # undef __expm1_code # undef __exp_code -# undef __sincos_code # endif /* __FAST_MATH__ */ # endif /* __NO_MATH_INLINES */