From d75e02d6431bdc368eeff1d96212279a8ca30886 Mon Sep 17 00:00:00 2001 From: "H.J. Lu" Date: Wed, 10 Aug 2005 17:53:01 +0000 Subject: [PATCH] config.gcc (i[34567]86-*-linux*): Add i386/t-crtfm to tm-file. 2005-08-10 H.J. Lu * config.gcc (i[34567]86-*-linux*): Add i386/t-crtfm to tm-file. (x86_64-*-linux*): Likewise. * config/i386/crtfastmath.c: New file. * config/i386/t-crtfm: Likewise. * config/i386/linux.h (ENDFILE_SPEC): New. * config/i386/linux64.h (ENDFILE_SPEC): Likewise. * config/i386/t-linux64 (EXTRA_MULTILIB_PARTS): Add crtfastmath.o. From-SVN: r102954 --- gcc/ChangeLog | 14 +++++++++ gcc/config.gcc | 4 +-- gcc/config/i386/crtfastmath.c | 72 +++++++++++++++++++++++++++++++++++++++++++ gcc/config/i386/linux.h | 6 ++++ gcc/config/i386/linux64.h | 6 ++++ gcc/config/i386/t-crtfm | 6 ++++ gcc/config/i386/t-linux64 | 3 +- 7 files changed, 108 insertions(+), 3 deletions(-) create mode 100644 gcc/config/i386/crtfastmath.c create mode 100644 gcc/config/i386/t-crtfm diff --git a/gcc/ChangeLog b/gcc/ChangeLog index e13b94e..4de14de 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,17 @@ +2005-08-10 H.J. Lu + + * config.gcc (i[34567]86-*-linux*): Add i386/t-crtfm to tm-file. + (x86_64-*-linux*): Likewise. + + * config/i386/crtfastmath.c: New file. + * config/i386/t-crtfm: Likewise. + + * config/i386/linux.h (ENDFILE_SPEC): New. + * config/i386/linux64.h (ENDFILE_SPEC): Likewise. + + * config/i386/t-linux64 (EXTRA_MULTILIB_PARTS): Add + crtfastmath.o. + 2005-08-10 Dorit Nuzman * doc/md.texi: (reduc_smin, reduc_umin, reduc_splus, reduc_uplus): diff --git a/gcc/config.gcc b/gcc/config.gcc index c7c2cf1..f4f045e 100644 --- a/gcc/config.gcc +++ b/gcc/config.gcc @@ -1019,7 +1019,7 @@ i[34567]86-*-linux* | i[34567]86-*-kfreebsd*-gnu | i[34567]86-*-knetbsd*-gnu) i[34567]86-*-knetbsd*-gnu) tm_file="${tm_file} knetbsd-gnu.h i386/knetbsd-gnu.h" ;; i[34567]86-*-kfreebsd*-gnu) tm_file="${tm_file} kfreebsd-gnu.h i386/kfreebsd-gnu.h" ;; esac - tmake_file="${tmake_file} i386/t-crtstuff" + tmake_file="${tmake_file} i386/t-crtstuff i386/t-crtfm" ;; x86_64-*-linux* | x86_64-*-kfreebsd*-gnu | x86_64-*-knetbsd*-gnu) tm_file="${tm_file} i386/unix.h i386/att.h dbxelf.h elfos.h svr4.h linux.h \ @@ -1028,7 +1028,7 @@ x86_64-*-linux* | x86_64-*-kfreebsd*-gnu | x86_64-*-knetbsd*-gnu) x86_64-*-kfreebsd*-gnu) tm_file="${tm_file} kfreebsd-gnu.h" ;; x86_64-*-knetbsd*-gnu) tm_file="${tm_file} knetbsd-gnu.h" ;; esac - tmake_file="${tmake_file} i386/t-linux64" + tmake_file="${tmake_file} i386/t-linux64 i386/t-crtfm" ;; i[34567]86-*-gnu*) ;; diff --git a/gcc/config/i386/crtfastmath.c b/gcc/config/i386/crtfastmath.c new file mode 100644 index 0000000..3412d6c --- /dev/null +++ b/gcc/config/i386/crtfastmath.c @@ -0,0 +1,72 @@ +/* + * Copyright (C) 2005 Free Software Foundation, Inc. + * + * This file is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License as published by the + * Free Software Foundation; either version 2, or (at your option) any + * later version. + * + * In addition to the permissions in the GNU General Public License, the + * Free Software Foundation gives you unlimited permission to link the + * compiled version of this file with other programs, and to distribute + * those programs without any restriction coming from the use of this + * file. (The General Public License restrictions do apply in other + * respects; for example, they cover modification of the file, and + * distribution when not linked into another program.) + * + * This file is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; see the file COPYING. If not, write to + * the Free Software Foundation, 59 Temple Place - Suite 330, + * Boston, MA 02111-1307, USA. + * + * As a special exception, if you link this library with files + * compiled with GCC to produce an executable, this does not cause + * the resulting executable to be covered by the GNU General Public License. + * This exception does not however invalidate any other reasons why + * the executable file might be covered by the GNU General Public License. + */ + +#define MXCSR_DAZ (1 << 6) /* Enable denormals are zero mode */ +#define MXCSR_FTZ (1 << 15) /* Enable flush to zero mode */ + +static void __attribute__((constructor)) +set_fast_math (void) +{ +#ifndef __x86_64__ + /* SSE is the part of 64bit. Only need to check it for 32bit. */ + unsigned int eax, ebx, ecx, edx; + + /* See if we can use cpuid. */ + asm volatile ("pushfl; pushfl; popl %0; movl %0,%1; xorl %2,%0;" + "pushl %0; popfl; pushfl; popl %0; popfl" + : "=&r" (eax), "=&r" (ebx) + : "i" (0x00200000)); + + if (((eax ^ ebx) & 0x00200000) == 0) + return; + + /* Check the highest input value for eax. */ + asm volatile ("xchgl %%ebx, %1; cpuid; xchgl %%ebx, %1" + : "=a" (eax), "=r" (ebx), "=c" (ecx), "=d" (edx) + : "0" (0)); + + if (eax == 0) + return; + + asm volatile ("xchgl %%ebx, %1; cpuid; xchgl %%ebx, %1" + : "=a" (eax), "=r" (ebx), "=c" (ecx), "=d" (edx) + : "0" (1)); + + if (edx & (1 << 25)) +#endif + { + unsigned int mxcsr = __builtin_ia32_stmxcsr (); + mxcsr |= MXCSR_DAZ | MXCSR_FTZ; + __builtin_ia32_ldmxcsr (mxcsr); + } +} diff --git a/gcc/config/i386/linux.h b/gcc/config/i386/linux.h index 082cc95..f85a9ef 100644 --- a/gcc/config/i386/linux.h +++ b/gcc/config/i386/linux.h @@ -121,6 +121,12 @@ Boston, MA 02110-1301, USA. */ %{!dynamic-linker:-dynamic-linker %(dynamic_linker)}} \ %{static:-static}}}" +/* Similar to standard Linux, but adding -ffast-math support. */ +#undef ENDFILE_SPEC +#define ENDFILE_SPEC \ + "%{ffast-math|funsafe-math-optimizations:crtfastmath.o%s} \ + %{shared|pie:crtendS.o%s;:crtend.o%s} crtn.o%s" + /* A C statement (sans semicolon) to output to the stdio stream FILE the assembler definition of uninitialized global DECL named NAME whose size is SIZE bytes and alignment is ALIGN bytes. diff --git a/gcc/config/i386/linux64.h b/gcc/config/i386/linux64.h index 3a37f63..d3ab452 100644 --- a/gcc/config/i386/linux64.h +++ b/gcc/config/i386/linux64.h @@ -64,6 +64,12 @@ Boston, MA 02110-1301, USA. */ %{!m32:%{!dynamic-linker:-dynamic-linker /lib64/ld-linux-x86-64.so.2}}} \ %{static:-static}}" +/* Similar to standard Linux, but adding -ffast-math support. */ +#undef ENDFILE_SPEC +#define ENDFILE_SPEC \ + "%{ffast-math|funsafe-math-optimizations:crtfastmath.o%s} \ + %{shared|pie:crtendS.o%s;:crtend.o%s} crtn.o%s" + #define MULTILIB_DEFAULTS { "m64" } #undef NEED_INDICATE_EXEC_STACK diff --git a/gcc/config/i386/t-crtfm b/gcc/config/i386/t-crtfm new file mode 100644 index 0000000..fc4b587 --- /dev/null +++ b/gcc/config/i386/t-crtfm @@ -0,0 +1,6 @@ +EXTRA_PARTS += crtfastmath.o + +$(T)crtfastmath.o: $(srcdir)/config/i386/crtfastmath.c $(GCC_PASSES) + $(GCC_FOR_TARGET) $(LIBGCC2_CFLAGS) -msse -c \ + $(srcdir)/config/i386/crtfastmath.c \ + -o $(T)crtfastmath$(objext) diff --git a/gcc/config/i386/t-linux64 b/gcc/config/i386/t-linux64 index 3b109d8..aac59a0 100644 --- a/gcc/config/i386/t-linux64 +++ b/gcc/config/i386/t-linux64 @@ -11,7 +11,8 @@ MULTILIB_OSDIRNAMES = ../lib64 ../lib LIBGCC = stmp-multilib INSTALL_LIBGCC = install-multilib -EXTRA_MULTILIB_PARTS=crtbegin.o crtend.o crtbeginS.o crtendS.o crtbeginT.o +EXTRA_MULTILIB_PARTS=crtbegin.o crtend.o crtbeginS.o crtendS.o \ + crtbeginT.o crtfastmath.o # The pushl in CTOR initialization interferes with frame pointer elimination. # crtend*.o cannot be compiled without -fno-asynchronous-unwind-tables, -- 2.7.4