Update.

1998-04-16 07:42  Geoff Keating  <geoffk@ozemail.com.au>

	* Makeconfig [!build-static]: Link `static' binaries with libc_pic.a.
	Still need *FLAGS-.o because we still sometimes build .o files.
	* db2/Makefile: Don't build libndbm.a if !build-static.

1998-04-16 07:42  Geoff Keating  <geoffk@ozemail.com.au>

	* configure.in: New test for broken gcc on PowerPC.
	* sysdeps/powerpc/atomicity.h: Use result of test.
	* linuxthreads/sysdeps/powerpc/pt-machine.h: Use result of test.

	* math/libm-test.c: Update many of the epsilon to match actual
	performance.

	* sysdeps/libm-ieee754/e_exp.c: Reduce the number of branches.
	* sysdeps/libm-ieee754/e_expf.c: Likewise.
	* sysdeps/libm-ieee754/s_exp2.c: Likewise.
	* sysdeps/libm-ieee754/s_exp2f.c: Likewise.

	* sysdeps/libm-ieee754/e_pow.c: Correct typo.

	* sysdeps/powerpc/elf/libc-start.c: New file.
	* sysdeps/powerpc/elf/start.S: New file, use libc-start.
	* sysdeps/powerpc/elf/start.c: Delete.

	* sysdeps/unix/sysv/linux/powerpc/Dist: Remove syscall.h
	* sysdeps/unix/sysv/linux/powerpc/syscall.h: Delete.  It was unused.

	* sysdeps/unix/sysv/linux/powerpc/dl-sysdep.c: Correct previous
	few patches.

8 files changed, 201 insertions, 95 deletions

diff --git a/sysdeps/libm-ieee754/e_exp.c b/sysdeps/libm-ieee754/e_exp.c
index 660c5bc88d..5eae12a19c 100644
--- a/sysdeps/libm-ieee754/e_exp.c
+++ b/sysdeps/libm-ieee754/e_exp.c
@@ -76,8 +76,8 @@ __ieee754_exp (double x)
   /* Check for usual case.  */
   if (isless (x, himark) && isgreater (x, lomark))
     {
-      static const double TWO43 = 8796093022208.0;
-      static const double TWO52 = 4503599627370496.0;
+      static const double THREEp42 = 13194139533312.0;
+      static const double THREEp51 = 6755399441055744.0;
       /* 1/ln(2).  */
       static const double M_1_LN2 = 1.442695040888963387;
       /* ln(2), part 1 */
@@ -94,40 +94,22 @@ __ieee754_exp (double x)
       fesetround (FE_TONEAREST);
 
       /* Calculate n.  */
-      if (x >= 0)
-	{
-	  n = x * M_1_LN2 + TWO52;
-	  n -= TWO52;
-	}
-      else
-	{
-	  n = x * M_1_LN2 - TWO52;
-	  n += TWO52;
-	}
+      n = x * M_1_LN2 + THREEp51;
+      n -= THREEp51;
       x = x - n*M_LN2_0;
-      if (x >= 0)
-	{
-	  /* Calculate t/512.  */
-	  t = x + TWO43;
-	  t -= TWO43;
-	  x -= t;
-
-	  /* Compute tval = t.  */
-	  tval = (int) (t * 512.0);
-
-	  x -= __exp_deltatable[tval];
-	}
-      else
-	{
-	  /* As above, but x is negative.  */
-	  t = x - TWO43;
-	  t += TWO43;
-	  x -= t;
 
-	  tval = (int) (t * 512.0);
+      /* Calculate t/512.  */
+      t = x + THREEp42;
+      t -= THREEp42;
+      x -= t;
 
-	  x += __exp_deltatable[-tval];
-	}
+      /* Compute tval = t.  */
+      tval = (int) (t * 512.0);
+
+      if (t >= 0)
+	x -= __exp_deltatable[tval];
+      else
+	x += __exp_deltatable[-tval];
 
       /* Now, the variable x contains x + n*ln(2)_1.  */
       dely = n*M_LN2_1;
diff --git a/sysdeps/libm-ieee754/e_expf.c b/sysdeps/libm-ieee754/e_expf.c
index c4a7b644fd..ff6357bd1d 100644
--- a/sysdeps/libm-ieee754/e_expf.c
+++ b/sysdeps/libm-ieee754/e_expf.c
@@ -71,8 +71,8 @@ __ieee754_expf (float x)
   /* Check for usual case.  */
   if (isless (x, himark) && isgreater (x, lomark))
     {
-      static const float TWO43 = 8796093022208.0;
-      static const float TWO23 = 8388608.0;
+      static const float THREEp42 = 13194139533312.0;
+      static const float THREEp22 = 12582912.0;
       /* 1/ln(2).  */
 #undef M_1_LN2
       static const float M_1_LN2 = 1.44269502163f;
@@ -90,40 +90,22 @@ __ieee754_expf (float x)
       fesetround (FE_TONEAREST);
 
       /* Calculate n.  */
-      if (x >= 0)
-	{
-	  n = x * M_1_LN2 + TWO23;
-	  n -= TWO23;
-	}
-      else
-	{
-	  n = x * M_1_LN2 - TWO23;
-	  n += TWO23;
-	}
+      n = x * M_1_LN2 + THREEp22;
+      n -= THREEp22;
       dx = x - n*M_LN2;
-      if (dx >= 0)
-	{
-	  /* Calculate t/512.  */
-	  t = dx + TWO43;
-	  t -= TWO43;
-	  dx -= t;
-
-	  /* Compute tval = t.  */
-	  tval = (int) (t * 512.0);
-
-	  delta = - __exp_deltatable[tval];
-	}
-      else
-	{
-	  /* As above, but x is negative.  */
-	  t = dx - TWO43;
-	  t += TWO43;
-	  dx -= t;
 
-	  tval = (int) (t * 512.0);
+      /* Calculate t/512.  */
+      t = dx + THREEp42;
+      t -= THREEp42;
+      dx -= t;
 
-	  delta = __exp_deltatable[-tval];
-	}
+      /* Compute tval = t.  */
+      tval = (int) (t * 512.0);
+
+      if (t >= 0)
+	delta = - __exp_deltatable[tval];
+      else
+	delta = __exp_deltatable[-tval];
 
       /* Compute ex2 = 2^n e^(t/512+delta[t]).  */
       ex2_u.d = __exp_atable[tval+177];
diff --git a/sysdeps/libm-ieee754/s_exp2.c b/sysdeps/libm-ieee754/s_exp2.c
index ead1ce89eb..875d4d6f2c 100644
--- a/sysdeps/libm-ieee754/s_exp2.c
+++ b/sysdeps/libm-ieee754/s_exp2.c
@@ -48,7 +48,7 @@ __ieee754_exp2 (double x)
   /* Check for usual case.  */
   if (isless (x, himark) && isgreater (x, lomark))
     {
-      static const double TWO43 = 8796093022208.0;
+      static const double THREEp42 = 13194139533312.0;
       int tval, unsafe;
       double rx, x22, result;
       union ieee754_double ex2_u, scale_u;
@@ -66,16 +66,8 @@ __ieee754_exp2 (double x)
 	 x = ex + t/512 + x1.
 
 	 First, calculate rx = ex + t/512.  */
-      if (x >= 0)
-	{
-	  rx = x + TWO43;
-	  rx -= TWO43;
-	}
-      else
-	{
-	  rx = x - TWO43;
-	  rx += TWO43;
-	}
+      rx = x + THREEp42;
+      rx -= THREEp42;
       x -= rx;  /* Compute x=x1. */
       /* Compute tval = (ex*512 + t)+256.
 	 Now, t = (tval mod 512)-256 and ex=tval/512  [that's mod, NOT %; and
diff --git a/sysdeps/libm-ieee754/s_exp2f.c b/sysdeps/libm-ieee754/s_exp2f.c
index 641b7548f1..8229885453 100644
--- a/sysdeps/libm-ieee754/s_exp2f.c
+++ b/sysdeps/libm-ieee754/s_exp2f.c
@@ -49,7 +49,7 @@ __ieee754_exp2f (float x)
   /* Check for usual case.  */
   if (isless (x, himark) && isgreater (x, lomark))
     {
-      static const float TWO15 = 32768.0;
+      static const float THREEp14 = 49152.0;
       int tval, unsafe;
       float rx, x22, result;
       union ieee754_float ex2_u, scale_u;
@@ -67,16 +67,8 @@ __ieee754_exp2f (float x)
 	 x = ex + t/512 + x1.
 
 	 First, calculate rx = ex + t/256.  */
-      if (x >= 0)
-	{
-	  rx = x + TWO15;
-	  rx -= TWO15;
-	}
-      else
-	{
-	  rx = x - TWO15;
-	  rx += TWO15;
-	}
+      rx = x + THREEp14;
+      rx -= THREEp14;
       x -= rx;  /* Compute x=x1. */
       /* Compute tval = (ex*256 + t)+128.
 	 Now, t = (tval mod 256)-128 and ex=tval/256  [that's mod, NOT %; and
diff --git a/sysdeps/powerpc/atomicity.h b/sysdeps/powerpc/atomicity.h
index dba09658cb..5b56532779 100644
--- a/sysdeps/powerpc/atomicity.h
+++ b/sysdeps/powerpc/atomicity.h
@@ -1,5 +1,5 @@
 /* Low-level functions for atomic operations.  PowerPC version.
-   Copyright (C) 1997 Free Software Foundation, Inc.
+   Copyright (C) 1997, 1998 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
@@ -22,7 +22,13 @@
 
 #include <inttypes.h>
 
-static inline int
+#if BROKEN_PPC_ASM_CR0
+# define __ATOMICITY_INLINE /* nothing */
+#else
+# define __ATOMICITY_INLINE inline
+#endif
+
+static __ATOMICITY_INLINE int
 __attribute__ ((unused))
 exchange_and_add (volatile uint32_t *mem, int val)
 {
@@ -36,7 +42,7 @@ exchange_and_add (volatile uint32_t *mem, int val)
   return result;
 }
 
-static inline void
+static __ATOMICITY_INLINE void
 __attribute__ ((unused))
 atomic_add (volatile uint32_t *mem, int val)
 {
@@ -49,7 +55,7 @@ atomic_add (volatile uint32_t *mem, int val)
 " : "=&r"(tmp) : "r" (mem), "r"(val) : "cr0");
 }
 
-static inline int
+static __ATOMICITY_INLINE int
 __attribute__ ((unused))
 compare_and_swap (volatile long int *p, long int oldval, long int newval)
 {
@@ -66,7 +72,7 @@ compare_and_swap (volatile long int *p, long int oldval, long int newval)
   return result;
 }
 
-static inline long int
+static __ATOMICITY_INLINE long int
 __attribute__ ((unused))
 always_swap (volatile long int *p, long int newval)
 {
@@ -79,7 +85,7 @@ always_swap (volatile long int *p, long int newval)
   return result;
 }
 
-static inline int
+static __ATOMICITY_INLINE int
 __attribute__ ((unused))
 test_and_set (volatile long int *p, long int oldval, long int newval)
 {
diff --git a/sysdeps/powerpc/elf/libc-start.c b/sysdeps/powerpc/elf/libc-start.c
new file mode 100644
index 0000000000..535eab2a64
--- /dev/null
+++ b/sysdeps/powerpc/elf/libc-start.c
@@ -0,0 +1,100 @@
+/* Copyright (C) 1998 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Library General Public License as
+   published by the Free Software Foundation; either version 2 of the
+   License, or (at your option) any later version.
+
+   The GNU C Library 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
+   Library General Public License for more details.
+
+   You should have received a copy of the GNU Library General Public
+   License along with the GNU C Library; see the file COPYING.LIB.  If not,
+   write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+   Boston, MA 02111-1307, USA.  */
+
+#include <stdlib.h>
+#include <unistd.h>
+#include <elf/ldsodefs.h>
+
+extern void __libc_init_first (int argc, char **argv, char **envp);
+
+extern int _dl_starting_up;
+weak_extern (_dl_starting_up)
+extern int __libc_multiple_libcs;
+
+struct startup_info
+{
+  void *sda_base;
+  int (*main) (int, char **, char **, void *);
+  int (*init) (int, char **, char **, void *);
+  void (*fini) (void);
+};
+
+int
+__libc_start_main (int argc, char **argv, char **envp,
+		   void *auxvec, void (*rtld_fini) (void),
+		   struct startup_info *stinfo,
+		   char **stack_on_entry)
+{
+#ifndef PIC
+  /* The next variable is only here to work around a bug in gcc <= 2.7.2.2.
+     If the address would be taken inside the expression the optimizer
+     would try to be too smart and throws it away.  Grrr.  */
+  int *dummy_addr = &_dl_starting_up;
+
+  __libc_multiple_libcs = dummy_addr && !_dl_starting_up;
+#endif
+
+  /* the PPC SVR4 ABI says that the top thing on the stack will
+     be a NULL pointer, so if not we assume that we're being called
+     as a statically-linked program by Linux...	 */
+  if (*stack_on_entry != NULL)
+    {
+      /* ...in which case, we have argc as the top thing on the
+	 stack, followed by argv (NULL-terminated), envp (likewise),
+	 and the auxilary vector.  */
+      argc = *(int *) stack_on_entry;
+      argv = stack_on_entry + 1;
+      envp = argv + argc + 1;
+      auxvec = envp;
+      while (*(char **) auxvec != NULL)
+	++auxvec;
+      ++auxvec;
+      rtld_fini = NULL;
+    }
+
+  /* Register the destructor of the dynamic linker if there is any.  */
+  if (rtld_fini != NULL)
+    atexit (rtld_fini);
+
+  /* Set the global _environ variable correctly.  */
+  __environ = envp;
+
+  /* Call the initializer of the libc.  */
+#ifdef PIC
+  if (_dl_debug_impcalls)
+    _dl_debug_message (1, "\ninitialize libc\n\n", NULL);
+#endif
+  __libc_init_first (argc, argv, envp);
+
+  /* Call the initializer of the program.  */
+#ifdef PIC
+  if (_dl_debug_impcalls)
+    _dl_debug_message (1, "\ninitialize program: ", argv[0], "\n\n", NULL);
+#endif
+  stinfo->init (argc, argv, __environ, auxvec);
+
+  /* Register the destructor of the program.  */
+  atexit (stinfo->fini);
+
+#ifdef PIC
+  if (_dl_debug_impcalls)
+    _dl_debug_message (1, "\ntransferring control: ", argv[0], "\n\n", NULL);
+#endif
+
+  exit (stinfo->main (argc, argv, __environ, auxvec));
+}
diff --git a/sysdeps/powerpc/elf/start.S b/sysdeps/powerpc/elf/start.S
new file mode 100644
index 0000000000..94cb423629
--- /dev/null
+++ b/sysdeps/powerpc/elf/start.S
@@ -0,0 +1,53 @@
+/* Startup code for programs linked with GNU libc.
+   Copyright (C) 1998 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Library General Public License as
+   published by the Free Software Foundation; either version 2 of the
+   License, or (at your option) any later version.
+
+   The GNU C Library 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
+   Library General Public License for more details.
+
+   You should have received a copy of the GNU Library General Public
+   License along with the GNU C Library; see the file COPYING.LIB.  If not,
+   write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+   Boston, MA 02111-1307, USA.  */
+
+#include <sysdep.h>
+
+ /* These are the various addresses we require.  */
+	.section ".rodata"
+	.align	2
+L(start_addresses):
+	.long	_SDA_BASE_
+	.long	JUMPTARGET(main)
+	.long 	JUMPTARGET(_init)
+	.long 	JUMPTARGET(_fini)
+	ASM_SIZE_DIRECTIVE(L(start_addresses))
+
+	.section ".text"
+ENTRY(_start)
+ /* Save the stack pointer, in case we're statically linked under Linux.  */
+	mr	%r9,%r1
+ /* Set up an initial stack frame, and clear the LR.  */
+	clrrwi	%r1,%r1,4
+	li	%r0,0
+	stwu	%r1,-16(%r1)
+	mtlr	%r0
+	stw	%r0,0(%r1)
+ /* Set r13 to point at the 'small data area', and put the address of
+    start_addresses in r8...  */
+	lis	%r8,L(start_addresses)@ha
+	lwzu	%r13,L(start_addresses)@l(%r8)
+ /* and continue in libc-start, in glibc.  */
+	b	JUMPTARGET(__libc_start_main)
+END(_start)
+
+/* Define a symbol for the first piece of initialized data.  */
+	.section ".data"
+__data_start:
+weak_alias (__data_start, data_start)
diff --git a/sysdeps/unix/sysv/linux/powerpc/Dist b/sysdeps/unix/sysv/linux/powerpc/Dist
index 0213c45f51..71eb76f0c0 100644
--- a/sysdeps/unix/sysv/linux/powerpc/Dist
+++ b/sysdeps/unix/sysv/linux/powerpc/Dist
@@ -3,4 +3,3 @@ clone.S
 kernel_stat.h
 kernel_termios.h
 init-first.h
-syscall.h