glibc/sysdeps/i386/fpu/w_sqrt_compat.c

/* The inline __ieee754_sqrt is not correctly rounding; it's OK for
   most internal uses in glibc, but not for sqrt itself.  */
#define NO_MATH_REDIRECT
#define __ieee754_sqrt __avoid_ieee754_sqrt
#include <math.h>
#include <math_private.h>
#undef __ieee754_sqrt
extern double __ieee754_sqrt (double);
#include <math/w_sqrt_compat.c>
Fix x86 sqrt rounding (bug 14032). 2013-11-29 16:31:16 +00:00			`/* The inline __ieee754_sqrt is not correctly rounding; it's OK for`
			`most internal uses in glibc, but not for sqrt itself. */`
Add support for sqrt asm redirects This patch series cleans up the many uses of __ieee754_sqrt(f/l) in GLIBC. The goal is to enable GCC to do the inlining, and if this fails call the __ieee754_sqrt function. This is done by internally declaring sqrt with asm redirects. The compat symbols and sqrt wrappers need to disable the redirect. The redirect is also disabled if there are already redirects defined when using -ffinite-math-only. All math functions (but not math tests, non-library code and libnldbl) are built with -fno-math-errno which means GCC will typically inline sqrt as a single instruction. This means targets are no longer forced to add a special inline for sqrt. * include/math.h (sqrt): Declare with asm redirect. (sqrtf): Likewise. (sqrtl): Likewise. (sqrtf128): Likewise. * Makeconfig: Add -fno-math-errno for libc/libm, but build testsuite, nonlib and libnldbl with -fmath-errno. * math/w_sqrt_compat.c: Define NO_MATH_REDIRECT. * math/w_sqrt_template.c: Likewise. * math/w_sqrtf_compat.c: Likewise. * math/w_sqrtl_compat.c: Likewise. * sysdeps/i386/fpu/w_sqrt.c: Likewise. * sysdeps/i386/fpu/w_sqrt_compat.c: Likewise. * sysdeps/generic/math-type-macros-float128.h: Remove math.h and complex.h. 2018-03-15 17:57:03 +00:00			`#define NO_MATH_REDIRECT`
Fix x86 sqrt rounding (bug 14032). 2013-11-29 16:31:16 +00:00			`#define __ieee754_sqrt __avoid_ieee754_sqrt`
			`#include <math.h>`
			`#include <math_private.h>`
			`#undef __ieee754_sqrt`
			`extern double __ieee754_sqrt (double);`
Move wrappers to libm-compat-calls-auto This commit moves one step towards the deprecation of wrappers that use _LIB_VERSION / matherr / __kernel_standard functionality, by adding the suffix '_compat' to their filenames and adjusting Makefiles and #includes accordingly. New template wrappers that do not use such functionality will be added by future patches and will be first used by the float128 wrappers. 2016-12-14 00:42:51 +00:00			`#include <math/w_sqrt_compat.c>`