crtfastmath.c: Move to ../libgcc/config/alpha.

	gcc:
	* config/alpha/crtfastmath.c: Move to ../libgcc/config/alpha.
	* config/alpha/t-crtfm: Remove.
	* config/i386/crtfastmath.c: Move to ../libgcc/config/i386.
	* config/i386/t-crtfm: Remove.
	* config/ia64/crtfastmath.c: Move to ../libgcc/config/ia64.
	* config/mips/crtfastmath.c: Move to ../libgcc/config/mips.
	* config/sparc/crtfastmath.c: Move to ../libgcc/config/sparc.
	* config/sparc/t-crtfm: Remove.

	* config.gcc (alpha*-*-linux*): Remove alpha/t-crtfm from tmake_file.
	(alpha*-*-freebsd*): Likewise.
	(i[34567]86-*-darwin*): Remove i386/t-crtfm from tmake_file.
	(x86_64-*-darwin*): Likewise.
	(i[34567]86-*-linux*): Likewise.
	(x86_64-*-linux*): Likewise.
	(x86_64-*-mingw*): Likewise.
	(ia64*-*-elf*): Remove crtfastmath.o from extra_parts.
	(ia64*-*-freebsd*): Likewise.
	(ia64*-*-linux*): Likewise.
	(mips64*-*-linux*): Likewise.
	(mips*-*-linux*): Likewise.
	(sparc-*-linux*): Remove sparc/t-crtfm from tmake_file.
	(sparc64-*-linux*): Likewise.
	(sparc64-*-freebsd*): Likewise.

	libgcc:
	* config/alpha/crtfastmath.c: New file.
	* config/i386/crtfastmath.c: New file.
	* config/ia64/crtfastmath.c: New file.
	* config/mips/crtfastmath.c: New file.
	* config/sparc/crtfastmath.c: New file.

	* config/t-crtfm (crtfastmath.o): Use $(srcdir) to refer to
	crtfastmath.c.
	Add -frandom-seed=gcc-crtfastmath.
	* config/alpha/t-crtfm: Remove.
	* config/i386/t-crtfm: Use $(srcdir) to refer to crtfastmath.c.
	* config/ia64/t-ia64 (crtfastmath.o): Remove.

	* config.host (alpha*-*-linux*): Replace alpha/t-crtfm by t-crtfm.
	(alpha*-dec-osf5.1*): Likewise.
	(alpha*-*-freebsd*): Add t-crtfm to tmake_file.
	Add crtfastmath.o to extra_parts.
	(i[34567]86-*-darwin*): Add i386/t-crtfm to tmake_file.
	Add crtfastmath.o to extra_parts.
	(x86_64-*-darwin*): Likewise.
	(x86_64-*-mingw*): Likewise.
	(ia64*-*-elf*): Add t-crtfm to tmake_file.
	(ia64*-*-freebsd*): Likewise.
	(ia64*-*-linux*): Likewise.
	(sparc64-*-freebsd*): Add t-crtfm to tmake_file.
	Add crtfastmath.o to extra_parts.

From-SVN: r176241

11 files changed, 348 insertions, 18 deletions

diff --git a/libgcc/ChangeLog b/libgcc/ChangeLog
index bfbf105..401287c 100644
--- a/libgcc/ChangeLog
+++ b/libgcc/ChangeLog
@@ -1,5 +1,34 @@
 2011-07-13  Rainer Orth  <ro@CeBiTec.Uni-Bielefeld.DE>
 
+	* config/alpha/crtfastmath.c: New file.
+	* config/i386/crtfastmath.c: New file.
+	* config/ia64/crtfastmath.c: New file.
+	* config/mips/crtfastmath.c: New file.
+	* config/sparc/crtfastmath.c: New file.
+
+	* config/t-crtfm (crtfastmath.o): Use $(srcdir) to refer to
+	crtfastmath.c.
+	Add -frandom-seed=gcc-crtfastmath.
+	* config/alpha/t-crtfm: Remove.
+	* config/i386/t-crtfm: Use $(srcdir) to refer to crtfastmath.c.
+	* config/ia64/t-ia64 (crtfastmath.o): Remove.
+
+	* config.host (alpha*-*-linux*): Replace alpha/t-crtfm by t-crtfm.
+	(alpha*-dec-osf5.1*): Likewise.
+	(alpha*-*-freebsd*): Add t-crtfm to tmake_file.
+	Add crtfastmath.o to extra_parts.
+	(i[34567]86-*-darwin*): Add i386/t-crtfm to tmake_file.
+	Add crtfastmath.o to extra_parts.
+	(x86_64-*-darwin*): Likewise.
+	(x86_64-*-mingw*): Likewise.
+	(ia64*-*-elf*): Add t-crtfm to tmake_file.
+	(ia64*-*-freebsd*): Likewise.
+	(ia64*-*-linux*): Likewise.
+	(sparc64-*-freebsd*): Add t-crtfm to tmake_file.
+	Add crtfastmath.o to extra_parts.
+
+2011-07-13  Rainer Orth  <ro@CeBiTec.Uni-Bielefeld.DE>
+
 	* config/darwin-crt3.o: New file.
 	* config/rs6000/darwin-crt2.c: New file.
 	* config/t-darwin: New file.
diff --git a/libgcc/config.host b/libgcc/config.host
index 56ce998..fba7ecd 100644
--- a/libgcc/config.host
+++ b/libgcc/config.host
@@ -224,18 +224,20 @@ esac
 
 case ${host} in
 alpha*-*-linux*)
-	tmake_file="${tmake_file} alpha/t-crtfm"
+	tmake_file="${tmake_file} t-crtfm"
 	extra_parts="$extra_parts crtfastmath.o"
 	md_unwind_header=alpha/linux-unwind.h
 	;;
 alpha*-*-freebsd*)
+	tmake_file="${tmake_file} t-crtfm"
+	extra_parts="$extra_parts crtfastmath.o"
 	;;
 alpha*-*-netbsd*)
 	;;
 alpha*-*-openbsd*)
 	;;
 alpha*-dec-osf5.1*)
-	tmake_file="${tmake_file} alpha/t-alpha alpha/t-ieee alpha/t-crtfm t-slibgcc alpha/t-slibgcc-osf"
+	tmake_file="${tmake_file} alpha/t-alpha alpha/t-ieee t-crtfm t-slibgcc alpha/t-slibgcc-osf"
 	case ${target_thread_file} in
 	  posix)
 	    tmake_file="${tmake_file} alpha/t-osf-pthread"
@@ -323,9 +325,12 @@ hppa[12]*-*-hpux11*)
 	md_unwind_header=pa/hpux-unwind.h
 	;;
 i[34567]86-*-darwin*)
+	tmake_file="$tmake_file i386/t-crtfm"
+	extra_parts="$extra_parts crtfastmath.o"
 	;;
 x86_64-*-darwin*)
-	tmake_file="t-darwin ${cpu_type}/t-darwin64 t-slibgcc-darwin"
+	tmake_file="t-darwin ${cpu_type}/t-darwin64 i386/t-crtfm t-slibgcc-darwin"
+	extra_parts="$extra_parts crtfastmath.o"
 	;;
 i[34567]86-*-elf*)
 	;;
@@ -398,21 +403,22 @@ i[34567]86-*-mingw*)
 	md_unwind_header=i386/w32-unwind.h
 	;;
 x86_64-*-mingw*)
-	tmake_file=t-dfprules
+	tmake_file="t-dfprules i386/t-crtfm"
+	extra_parts="$extra_parts crtfastmath.o"
 	;;
 i[34567]86-*-interix3*)
 	;;
 ia64*-*-elf*)
 	extra_parts="crtbegin.o crtend.o crtbeginS.o crtendS.o crtfastmath.o"
-	tmake_file="ia64/t-ia64"
+	tmake_file="ia64/t-ia64 t-crtfm"
 	;;
 ia64*-*-freebsd*)
 	extra_parts="crtbegin.o crtend.o crtbeginS.o crtendS.o crtfastmath.o"
-	tmake_file="ia64/t-ia64"
+	tmake_file="ia64/t-ia64 t-crtfm"
 	;;
 ia64*-*-linux*)
 	extra_parts="crtbegin.o crtend.o crtbeginS.o crtendS.o crtfastmath.o"
-	tmake_file="ia64/t-ia64 t-softfp ia64/t-fprules-softfp ia64/t-softfp-compat"
+	tmake_file="ia64/t-ia64 t-crtfm t-softfp ia64/t-fprules-softfp ia64/t-softfp-compat"
 	md_unwind_header=ia64/linux-unwind.h
 	;;
 ia64*-*-hpux*)
@@ -644,6 +650,8 @@ sparc64-*-elf*)
 sparc-wrs-vxworks)
 	;;
 sparc64-*-freebsd*|ultrasparc-*-freebsd*)
+	tmake_file="$tmake_file t-crtfm"
+	extra_parts=crtfastmath.o
 	;;
 sparc64-*-linux*)		# 64-bit SPARC's running GNU/Linux
 	extra_parts="$extra_parts crtfastmath.o"
diff --git a/libgcc/config/alpha/crtfastmath.c b/libgcc/config/alpha/crtfastmath.c
new file mode 100644
index 0000000..677b9ed
--- /dev/null
+++ b/libgcc/config/alpha/crtfastmath.c
@@ -0,0 +1,36 @@
+/*
+ * Copyright (C) 2001, 2009 Free Software Foundation, Inc.
+ * Contributed by Richard Henderson (rth@redhat.com)
+ *
+ * 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 3, or (at your option) any
+ * later version.
+ * 
+ * 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.
+ * 
+ * Under Section 7 of GPL version 3, you are granted additional
+ * permissions described in the GCC Runtime Library Exception, version
+ * 3.1, as published by the Free Software Foundation.
+ *
+ * You should have received a copy of the GNU General Public License and
+ * a copy of the GCC Runtime Library Exception along with this program;
+ * see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
+ * <http://www.gnu.org/licenses/>.
+ */
+
+/* Assume OSF/1 compatible interfaces.  */
+
+extern void __ieee_set_fp_control (unsigned long int);
+
+#define IEEE_MAP_DMZ  (1UL<<12)       /* Map denorm inputs to zero */
+#define IEEE_MAP_UMZ  (1UL<<13)       /* Map underflowed outputs to zero */
+
+static void __attribute__((constructor))
+set_fast_math (void)
+{
+  __ieee_set_fp_control (IEEE_MAP_DMZ | IEEE_MAP_UMZ);
+}
diff --git a/libgcc/config/alpha/t-crtfm b/libgcc/config/alpha/t-crtfm
deleted file mode 100644
index 5060c15..0000000
--- a/libgcc/config/alpha/t-crtfm
+++ /dev/null
@@ -1,5 +0,0 @@
-# FIXME drow/20061228 - I have preserved this -frandom-seed option
-# while migrating this rule from the GCC directory, but I do not
-# know why it is necessary if no other crt file uses it.
-crtfastmath.o: $(gcc_srcdir)/config/alpha/crtfastmath.c
-	$(gcc_compile) -frandom-seed=gcc-crtfastmath -c $<
diff --git a/libgcc/config/i386/crtfastmath.c b/libgcc/config/i386/crtfastmath.c
new file mode 100644
index 0000000..7abe500
--- /dev/null
+++ b/libgcc/config/i386/crtfastmath.c
@@ -0,0 +1,131 @@
+/*
+ * Copyright (C) 2005, 2007, 2009, 2011 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 3, or (at your option) any
+ * later version.
+ * 
+ * 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.
+ * 
+ * Under Section 7 of GPL version 3, you are granted additional
+ * permissions described in the GCC Runtime Library Exception, version
+ * 3.1, as published by the Free Software Foundation.
+ *
+ * You should have received a copy of the GNU General Public License and
+ * a copy of the GCC Runtime Library Exception along with this program;
+ * see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
+ * <http://www.gnu.org/licenses/>.
+ */
+
+#define MXCSR_DAZ (1 << 6)	/* Enable denormals are zero mode */
+#define MXCSR_FTZ (1 << 15)	/* Enable flush to zero mode */
+
+#ifndef __x86_64__
+/* All 64-bit targets have SSE and DAZ;
+   only check them explicitly for 32-bit ones. */
+#include "cpuid.h"
+#endif
+
+#if !defined __x86_64__ && defined __sun__ && defined __svr4__
+#include <signal.h>
+#include <ucontext.h>
+
+static volatile sig_atomic_t sigill_caught;
+
+static void
+sigill_hdlr (int sig __attribute((unused)),
+	     siginfo_t *sip __attribute__((unused)),
+	     ucontext_t *ucp)
+{
+  sigill_caught = 1;
+  /* Set PC to the instruction after the faulting one to skip over it,
+     otherwise we enter an infinite loop.  3 is the size of the movaps
+     instruction.  */
+  ucp->uc_mcontext.gregs[EIP] += 3;
+  setcontext (ucp);
+}
+#endif
+
+static void __attribute__((constructor))
+#ifndef __x86_64__
+/* The i386 ABI only requires 4-byte stack alignment, so this is necessary
+   to make sure the fxsave struct gets correct alignment.
+   See PR27537 and PR28621.  */
+__attribute__ ((force_align_arg_pointer))
+#endif
+set_fast_math (void)
+{
+#ifndef __x86_64__
+  unsigned int eax, ebx, ecx, edx;
+
+  if (!__get_cpuid (1, &eax, &ebx, &ecx, &edx))
+    return;
+
+  if (edx & bit_SSE)
+    {
+      unsigned int mxcsr;
+  
+#if defined __sun__ && defined __svr4__
+      /* Solaris 2 before Solaris 9 4/04 cannot execute SSE instructions even
+	 if the CPU supports them.  Programs receive SIGILL instead, so check
+	 for that at runtime.  */
+      struct sigaction act, oact;
+
+      act.sa_handler = sigill_hdlr;
+      sigemptyset (&act.sa_mask);
+      /* Need to set SA_SIGINFO so a ucontext_t * is passed to the handler.  */
+      act.sa_flags = SA_SIGINFO;
+      sigaction (SIGILL, &act, &oact);
+
+      /* We need a single SSE instruction here so the handler can safely skip
+	 over it.  */
+      __asm__ volatile ("movaps %xmm0,%xmm0");
+
+      sigaction (SIGILL, &oact, NULL);
+
+      if (sigill_caught)
+	return;
+#endif /* __sun__ && __svr4__ */
+
+      mxcsr = __builtin_ia32_stmxcsr () | MXCSR_FTZ;
+
+      if (edx & bit_FXSAVE)
+	{
+	  /* Check if DAZ is available.  */
+	  struct
+	    {
+	      unsigned short int cwd;
+	      unsigned short int swd;
+	      unsigned short int twd;
+	      unsigned short int fop;
+	      long int fip;
+	      long int fcs;
+	      long int foo;
+	      long int fos;
+	      long int mxcsr;
+	      long int mxcsr_mask;
+	      long int st_space[32];
+	      long int xmm_space[32];
+	      long int padding[56];
+	    } __attribute__ ((aligned (16))) fxsave;
+
+	  __builtin_memset (&fxsave, 0, sizeof (fxsave));
+
+	  asm volatile ("fxsave %0" : "=m" (fxsave) : "m" (fxsave));
+
+	  if (fxsave.mxcsr_mask & MXCSR_DAZ)
+	    mxcsr |= MXCSR_DAZ;
+	}
+
+      __builtin_ia32_ldmxcsr (mxcsr);
+    }
+#else
+  unsigned int mxcsr = __builtin_ia32_stmxcsr ();
+  mxcsr |= MXCSR_DAZ | MXCSR_FTZ;
+  __builtin_ia32_ldmxcsr (mxcsr);
+#endif
+}
diff --git a/libgcc/config/i386/t-crtfm b/libgcc/config/i386/t-crtfm
index f71f99a..46ce70b 100644
--- a/libgcc/config/i386/t-crtfm
+++ b/libgcc/config/i386/t-crtfm
@@ -1,4 +1,4 @@
 # This is an endfile, Use -minline-all-stringops to ensure
 # that __builtin_memset doesn't refer to the lib function memset().
-crtfastmath.o: $(gcc_srcdir)/config/i386/crtfastmath.c
+crtfastmath.o: $(srcdir)/config/i386/crtfastmath.c
 	$(gcc_compile) -msse -minline-all-stringops -c $<
diff --git a/libgcc/config/ia64/crtfastmath.c b/libgcc/config/ia64/crtfastmath.c
new file mode 100644
index 0000000..0decd2a
--- /dev/null
+++ b/libgcc/config/ia64/crtfastmath.c
@@ -0,0 +1,34 @@
+/* Copyright (C) 2001, 2005, 2009 Free Software Foundation, Inc.
+   Contributed by David Mosberger <davidm@hpl.hp.com>.
+
+   This file is part of GCC.
+
+   GCC 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 3, or (at your option)
+   any later version.
+
+   GCC 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.
+
+   Under Section 7 of GPL version 3, you are granted additional
+   permissions described in the GCC Runtime Library Exception, version
+   3.1, as published by the Free Software Foundation.
+
+   You should have received a copy of the GNU General Public License and
+   a copy of the GCC Runtime Library Exception along with this program;
+   see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
+   <http://www.gnu.org/licenses/>.  */
+
+/* We could call fesetenv() here but that would create a confusing
+   dependency on libm (since that is where fesetenv() gets defined.
+   To avoid this, just do everything locally.  */
+#define FE_NONIEEE_ENV 0x0009a04d0270037f
+
+static void __attribute__((constructor))
+__ia64_set_fast_math (void)
+{
+  __asm__ __volatile__ ("mov.m ar.fpsr=%0" : : "r"(FE_NONIEEE_ENV));
+}
diff --git a/libgcc/config/ia64/t-ia64 b/libgcc/config/ia64/t-ia64
index d9c7566..3ec5fc5 100644
--- a/libgcc/config/ia64/t-ia64
+++ b/libgcc/config/ia64/t-ia64
@@ -13,6 +13,3 @@ crtbeginS.o: $(gcc_srcdir)/config/ia64/crtbegin.asm
 crtendS.o: $(gcc_srcdir)/config/ia64/crtend.asm
 	$(CC) $(compile_deps) -I. -I$(gcc_objdir) -c -x assembler-with-cpp \
 		-o $@ -DSHARED $(gcc_srcdir)/config/ia64/crtend.asm
-
-crtfastmath.o: $(gcc_srcdir)/config/ia64/crtfastmath.c
-	$(gcc_compile) -c $(gcc_srcdir)/config/ia64/crtfastmath.c
diff --git a/libgcc/config/mips/crtfastmath.c b/libgcc/config/mips/crtfastmath.c
new file mode 100644
index 0000000..a9586b0
--- /dev/null
+++ b/libgcc/config/mips/crtfastmath.c
@@ -0,0 +1,53 @@
+/* Copyright (C) 2010 Free Software Foundation, Inc. 
+
+   This file is part of GCC.
+
+   GCC 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 3, or (at your option)
+   any later version.
+
+   GCC 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.
+
+   Under Section 7 of GPL version 3, you are granted additional
+   permissions described in the GCC Runtime Library Exception, version
+   3.1, as published by the Free Software Foundation.
+
+   You should have received a copy of the GNU General Public License
+   and a copy of the GCC Runtime Library Exception along with this
+   program; see the files COPYING3 and COPYING.RUNTIME respectively.
+   If not, see <http://www.gnu.org/licenses/>.  */
+
+#ifdef __mips_hard_float
+
+/* Flush denormalized numbers to zero.  */
+#define _FPU_FLUSH_TZ   0x1000000
+
+/* Rounding control.  */
+#define _FPU_RC_NEAREST 0x0     /* RECOMMENDED */
+#define _FPU_RC_ZERO    0x1
+#define _FPU_RC_UP      0x2
+#define _FPU_RC_DOWN    0x3
+
+/* Enable interrupts for IEEE exceptions.  */
+#define _FPU_IEEE     0x00000F80
+
+/* Macros for accessing the hardware control word.  */
+#define _FPU_GETCW(cw) __asm__ ("cfc1 %0,$31" : "=r" (cw))
+#define _FPU_SETCW(cw) __asm__ ("ctc1 %0,$31" : : "r" (cw))
+
+static void __attribute__((constructor))
+set_fast_math (void)
+{
+  unsigned int fcr;
+
+  /* Flush to zero, round to nearest, IEEE exceptions disabled.  */
+  fcr = _FPU_FLUSH_TZ | _FPU_RC_NEAREST;
+
+  _FPU_SETCW(fcr);
+}
+
+#endif /* __mips_hard_float */
diff --git a/libgcc/config/sparc/crtfastmath.c b/libgcc/config/sparc/crtfastmath.c
new file mode 100644
index 0000000..04727ec
--- /dev/null
+++ b/libgcc/config/sparc/crtfastmath.c
@@ -0,0 +1,44 @@
+/*
+ * Copyright (C) 2001, 2009 Free Software Foundation, Inc.
+ * Contributed by David S. Miller (davem@redhat.com)
+ *
+ * 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 3, or (at your option) any
+ * later version.
+ * 
+ * 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.
+ * 
+ * Under Section 7 of GPL version 3, you are granted additional
+ * permissions described in the GCC Runtime Library Exception, version
+ * 3.1, as published by the Free Software Foundation.
+ *
+ * You should have received a copy of the GNU General Public License and
+ * a copy of the GCC Runtime Library Exception along with this program;
+ * see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
+ * <http://www.gnu.org/licenses/>.
+ */
+
+#define FPRS_NS		(1 << 22)	/* Non-Standard fpu results */
+
+static void __attribute__((constructor))
+set_fast_math (void)
+{
+  unsigned int fsr;
+
+  /* This works for the 64-bit case because, even if 32-bit ld/st of
+     the fsr register modified the upper 32-bit, the only thing up there
+     are the 3 other condition codes which are "do not care" at the time
+     that this runs.  */
+
+  __asm__("st %%fsr, %0"
+	  : "=m" (fsr));
+
+  fsr |= FPRS_NS;
+
+  __asm__("ld %0, %%fsr"
+	  : : "m" (fsr));
+}
diff --git a/libgcc/config/t-crtfm b/libgcc/config/t-crtfm
index 6b9d84c..1d3b8ec 100644
--- a/libgcc/config/t-crtfm
+++ b/libgcc/config/t-crtfm
@@ -1,2 +1,5 @@
-crtfastmath.o: $(gcc_srcdir)/config/$(cpu_type)/crtfastmath.c
-	$(gcc_compile) -c $<
+# -frandom-seed is necessary to avoid bootstrap comparison failures due to
+# changing mangled names of the constructor on Tru64 Unix, but harmless
+# otherwise.
+crtfastmath.o: $(srcdir)/config/$(cpu_type)/crtfastmath.c
+	$(gcc_compile) -frandom-seed=gcc-crtfastmath -c $<