From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: by sourceware.org (Postfix, from userid 7891) id C398438532DA; Tue, 29 Nov 2022 08:01:13 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org C398438532DA DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=sourceware.org; s=default; t=1669708873; bh=7+tRG8IxxSSdnqUUlMBfOzRxOMAp9M+xXxhOOHXuSdg=; h=From:To:Subject:Date:From; b=ds99sg8Hh0wKpCjggZxBwSOEW2epi9Wg+sPVnM0EXQB74bNXCesFXxG4DN/DZjhjP s6GvBUv0Cz6PZk0HsgIRBbCzaRVRiJAdXgDl9xQSrz7RPrwrEmeF8Z0y+zxwqUNleH Pm+hStza79oZtN67nbJy1czPwsy0hK89yhelGRYM= Content-Type: text/plain; charset="us-ascii" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit From: Yinyu Cai To: glibc-cvs@sourceware.org Subject: [glibc] Use GCC builtins for logb functions if desired. X-Act-Checkin: glibc X-Git-Author: Xiaolin Tang X-Git-Refname: refs/heads/master X-Git-Oldrev: f711e4ef53990b6c76f2dfdbcb9f791c541cdac3 X-Git-Newrev: 2e2485ce05bce85bf092ba0752854afa14b92dad Message-Id: <20221129080113.C398438532DA@sourceware.org> Date: Tue, 29 Nov 2022 08:01:13 +0000 (GMT) List-Id: https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=2e2485ce05bce85bf092ba0752854afa14b92dad commit 2e2485ce05bce85bf092ba0752854afa14b92dad Author: Xiaolin Tang Date: Wed Nov 23 11:45:00 2022 +0800 Use GCC builtins for logb functions if desired. This patch is using the corresponding GCC builtin for logbf, logb, logbl and logbf128 if the USE_FUNCTION_BUILTIN macros are defined to one in math-use-builtins-function.h. Co-Authored-By: Xi Ruoyao Diff: --- sysdeps/generic/math-use-builtins-logb.h | 4 ++++ sysdeps/generic/math-use-builtins.h | 1 + sysdeps/ieee754/dbl-64/s_logb.c | 5 +++++ sysdeps/ieee754/float128/float128_private.h | 2 ++ sysdeps/ieee754/flt-32/s_logbf.c | 5 +++++ sysdeps/ieee754/ldbl-128/s_logbl.c | 6 ++++++ 6 files changed, 23 insertions(+) diff --git a/sysdeps/generic/math-use-builtins-logb.h b/sysdeps/generic/math-use-builtins-logb.h new file mode 100644 index 0000000000..e816a7e0a1 --- /dev/null +++ b/sysdeps/generic/math-use-builtins-logb.h @@ -0,0 +1,4 @@ +#define USE_LOGB_BUILTIN 0 +#define USE_LOGBF_BUILTIN 0 +#define USE_LOGBL_BUILTIN 0 +#define USE_LOGBF128_BUILTIN 0 diff --git a/sysdeps/generic/math-use-builtins.h b/sysdeps/generic/math-use-builtins.h index dddeaa4ea8..c59612a878 100644 --- a/sysdeps/generic/math-use-builtins.h +++ b/sysdeps/generic/math-use-builtins.h @@ -39,5 +39,6 @@ #include #include #include +#include #endif /* MATH_USE_BUILTINS_H */ diff --git a/sysdeps/ieee754/dbl-64/s_logb.c b/sysdeps/ieee754/dbl-64/s_logb.c index 82cabd206a..dd74d5f08c 100644 --- a/sysdeps/ieee754/dbl-64/s_logb.c +++ b/sysdeps/ieee754/dbl-64/s_logb.c @@ -21,10 +21,14 @@ #include #include #include +#include double __logb (double x) { +#if USE_LOGB_BUILTIN + return __builtin_logb (x); +#else int64_t ix, ex; EXTRACT_WORDS64 (ix, x); @@ -42,6 +46,7 @@ __logb (double x) if (FIX_INT_FP_CONVERT_ZERO && ex == 1023) return 0.0; return (double) (ex - 1023); +#endif /* !USE_LOGB_BUILTIN */ } #ifndef __logb libm_alias_double (__logb, logb) diff --git a/sysdeps/ieee754/float128/float128_private.h b/sysdeps/ieee754/float128/float128_private.h index 3bb5fffa74..78107b1525 100644 --- a/sysdeps/ieee754/float128/float128_private.h +++ b/sysdeps/ieee754/float128/float128_private.h @@ -165,6 +165,8 @@ #define USE_LRINTL_BUILTIN USE_LRINTF128_BUILTIN #undef USE_LLRINTL_BUILTIN #define USE_LLRINTL_BUILTIN USE_LLRINTF128_BUILTIN +#undef USE_LOGBL_BUILTIN +#define USE_LOGBL_BUILTIN USE_LOGBF128_BUILTIN /* IEEE function renames. */ #define __ieee754_acoshl __ieee754_acoshf128 diff --git a/sysdeps/ieee754/flt-32/s_logbf.c b/sysdeps/ieee754/flt-32/s_logbf.c index a06f975797..b027e7b9c2 100644 --- a/sysdeps/ieee754/flt-32/s_logbf.c +++ b/sysdeps/ieee754/flt-32/s_logbf.c @@ -16,10 +16,14 @@ #include #include #include +#include float __logbf (float x) { +#if USE_LOGBF_BUILTIN + return __builtin_logbf (x); +#else int32_t ix, rix; GET_FLOAT_WORD (ix, x); @@ -37,5 +41,6 @@ __logbf (float x) if (FIX_INT_FP_CONVERT_ZERO && rix == 127) return 0.0f; return (float) (rix - 127); +#endif /* ! USE_LOGBF_BUILTIN */ } libm_alias_float (__logb, logb) diff --git a/sysdeps/ieee754/ldbl-128/s_logbl.c b/sysdeps/ieee754/ldbl-128/s_logbl.c index 1c56eda499..59b08aa295 100644 --- a/sysdeps/ieee754/ldbl-128/s_logbl.c +++ b/sysdeps/ieee754/ldbl-128/s_logbl.c @@ -25,10 +25,15 @@ static char rcsid[] = "$NetBSD: $"; #include #include #include +#include _Float128 __logbl (_Float128 x) { +#if USE_LOGBL_BUILTIN + return __builtin_logbl (x); +#else + /* Use generic implementation. */ int64_t lx, hx, ex; GET_LDOUBLE_WORDS64 (hx, lx, x); @@ -49,6 +54,7 @@ __logbl (_Float128 x) ex -= ma - 16; } return (_Float128) (ex - 16383); +#endif /* ! USE_LOGBL_BUILTIN */ } libm_alias_ldouble (__logb, logb)