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.

15 files changed, 299 insertions, 125 deletions

diff --git a/ChangeLog b/ChangeLog
index cdc8c2e0e8..803811de6c 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,35 @@
+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.
+
 1998-05-06 12:51  Ulrich Drepper  <drepper@cygnus.com>
 
 	* sysdeps/i386/fpu/bits/mathinline.h (pow): Use long long int for
diff --git a/Makeconfig b/Makeconfig
index 1a93b0aefd..1948e79512 100644
--- a/Makeconfig
+++ b/Makeconfig
@@ -440,8 +440,16 @@ endif
 endif
 
 # The static libraries.
+ifeq (yes,$(build-static))
 link-libc-static = $(common-objpfx)libc.a $(gnulib) $(common-objpfx)libc.a
 link-extra-libs-static = $(foreach lib,$(LDLIBS-$(@F)),$(common-objpfx)$(lib).a)
+else
+ifeq (yes,$(build-shared))
+# We can try to link the programs with lib*_pic.a...
+link-libc-static = $(link-libc) $(common-objpfx)libc_pic.a
+link-extra-libs-static = $(link-extra-libs)
+endif
+endif
 
 ifndef gnulib
 gnulib := -lgcc
@@ -584,9 +592,9 @@ endif
 libtypes = $(foreach o,$(object-suffixes-for-libc),$(libtype$o))
 all-object-suffixes := .o .os .op .og .ob .oS
 object-suffixes :=
-ifeq (yes,$(build-static))
 CPPFLAGS-.o = $(pic-default)
 CFLAGS-.o = $(filter %frame-pointer,$(+cflags))
+ifeq (yes,$(build-static))
 libtype.o := lib%.a
 object-suffixes += .o
 endif
diff --git a/config.h.in b/config.h.in
index 8cee659dfa..f15e5c7b06 100644
--- a/config.h.in
+++ b/config.h.in
@@ -59,10 +59,14 @@
    with static variable. */
 #undef	HAVE_DWARF2_UNWIND_INFO_STATIC
 
-/* Define is the regparm attribute shall be used for local functions
+/* Define if the regparm attribute shall be used for local functions
    (gcc on ix86 only).  */
 #undef	USE_REGPARMS
 
+/* Defined on PowerPC if the GCC being used has a problem with clobbering
+   certain registers (CR0, MQ, CTR, LR) in asm statements.  */
+#undef	BROKEN_PPC_ASM_CR0
+
 
 /* Defined to some form of __attribute__ ((...)) if the compiler supports
    a different, more efficient calling convention.  */
diff --git a/configure.in b/configure.in
index e7dfcc59a3..9866d4b8aa 100644
--- a/configure.in
+++ b/configure.in
@@ -921,6 +921,18 @@ else
 fi
 fi
 
+if test "$host_cpu" = powerpc ; then
+# Check for a bug present in at least versions 2.8.x of GCC
+# and versions 1.0.x of EGCS.
+AC_CACHE_CHECK(whether clobbering cr0 causes problems,libc_cv_c_asmcr0_bug,[dnl
+AC_TRY_COMPILE([int tester(int x) { asm ("" : : : "cc"); return x & 123; }],,
+	       libc_cv_c_asmcr0_bug='no',
+	       libc_cv_c_asmcr0_bug='yes')])
+if test "$libc_cv_c_asmcr0_bug" != 'no'; then
+  AC_DEFINE(BROKEN_PPC_ASM_CR0)
+fi
+fi
+
 AC_CACHE_CHECK(for DWARF2 unwind info support, libc_cv_gcc_dwarf2_unwind_info,
 [cat > conftest.c <<EOF
 #line __oline__ "configure"
diff --git a/db2/Makefile b/db2/Makefile
index 594b802861..35c67dadfe 100644
--- a/db2/Makefile
+++ b/db2/Makefile
@@ -111,9 +111,11 @@ endif
 # Depend on libc.so so a DT_NEEDED is generated in the shared objects.
 $(objpfx)libdb.so: $(common-objpfx)libc.so
 
+ifeq ($(build-static),yes)
 subdir_install: $(inst_libdir)/libndbm.a
 $(inst_libdir)/libndbm.a: $(inst_libdir)/libdb.a $(+force)
 	$(make-link)
+endif
 
 ifeq ($(build-shared),yes)
 subdir_install: $(inst_libdir)/libndbm.so
diff --git a/linuxthreads/sysdeps/powerpc/pt-machine.h b/linuxthreads/sysdeps/powerpc/pt-machine.h
index a08828b322..a52af8a7eb 100644
--- a/linuxthreads/sysdeps/powerpc/pt-machine.h
+++ b/linuxthreads/sysdeps/powerpc/pt-machine.h
@@ -1,6 +1,6 @@
 /* Machine-dependent pthreads configuration and inline functions.
    powerpc version.
-   Copyright (C) 1996, 1997 Free Software Foundation, Inc.
+   Copyright (C) 1996, 1997, 1998 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
    Contributed by Richard Henderson <rth@tamu.edu>.
 
@@ -32,7 +32,12 @@
 #endif
 
 /* Spinlock implementation; required.  */
-extern inline int
+#if BROKEN_PPC_ASM_CR0
+static
+#else
+extern inline
+#endif
+int
 testandset (int *spinlock)
 {
   int ret;
@@ -63,7 +68,12 @@ register char * stack_pointer __asm__ ("r1");
 /* note that test-and-set(x) is the same as compare-and-swap(x, 0, 1) */
 
 #define HAS_COMPARE_AND_SWAP
-extern inline int
+#if BROKEN_PPC_ASM_CR0
+static
+#else
+extern inline
+#endif
+int
 __compare_and_swap (int *p, int oldval, int newval)
 {
   int ret;
diff --git a/math/libm-test.c b/math/libm-test.c
index 8ec4f1be4d..40838f57d4 100644
--- a/math/libm-test.c
+++ b/math/libm-test.c
@@ -1072,7 +1072,7 @@ cbrt_test (void)
   check_eps ("cbrt (-27) == -3", FUNC(cbrt) (-27.0), -3.0,
 	     CHOOSE (3e-16L, 5e-16, 0));
   check_eps ("cbrt (0.970299) == 0.99", FUNC(cbrt) (0.970299), 0.99,
-	     CHOOSE (2e-17L, 0, 0));
+	     CHOOSE (2e-17L, 2e-16, 0));
   check_eps ("cbrt (0.7) == .8879040017...", FUNC(cbrt) (0.7),
 	     0.8879040017426007084L, CHOOSE(2e-17L, 6e-16, 0));
 
@@ -1113,7 +1113,7 @@ cos_test (void)
 	     0, CHOOSE (1e-19L, 1e-16L, 1e-7L));
 
   check_eps ("cos (0.7) == 0.7648421872...", FUNC(cos) (0.7),
-	     0.7648421872844884262L, CHOOSE(3e-17, 2e-16, 0));
+	     0.7648421872844884262L, CHOOSE(3e-17, 2e-16, 6e-8));
 }
 
 static void
@@ -1608,7 +1608,7 @@ log10_test (void)
   check_eps ("log10 (e) == M_LOG10E", FUNC(log10) (M_El), M_LOG10El,
 	     CHOOSE (1e-18, 0, 9e-8));
   check_eps ("log10 (0.7) == -0.1549019599...", FUNC(log10) (0.7),
-	     -0.15490195998574316929L, CHOOSE(3e-17L, 3e-17, 0));
+	     -0.15490195998574316929L, CHOOSE(3e-17L, 3e-17, 2e-8));
 }
 
 
@@ -1857,7 +1857,7 @@ sinh_test (void)
 #endif
 
   check_eps ("sinh (0.7) == 0.7585837018...", FUNC(sinh) (0.7),
-	     0.75858370183953350346L, CHOOSE(6e-17L, 0, 6e-8));
+	     0.75858370183953350346L, CHOOSE(6e-17L, 2e-16, 6e-8));
 }
 
 
@@ -1914,7 +1914,7 @@ sincos_test (void)
   check_eps ("sincos (0.7, &sin, &cos) puts 0.6442176872... in sin", sin_res,
 	     0.64421768723769105367L, CHOOSE(4e-17L, 0, 0));
   check_eps ("sincos (0.7, &sin, &cos) puts 0.7648421872... in cos", cos_res,
-	     0.76484218728448842626L, CHOOSE(3e-17L, 2e-16, 0));
+	     0.76484218728448842626L, CHOOSE(3e-17L, 2e-16, 6e-8));
 }
 
 
@@ -1946,7 +1946,7 @@ tanh_test (void)
   check ("tanh (-inf) == -1", FUNC(tanh) (minus_infty), -1);
 #endif
   check_eps ("tanh (0.7) == 0.6043677771...", FUNC(tanh) (0.7),
-	     0.60436777711716349631L, CHOOSE(3e-17L, 0, 6e-8));
+	     0.60436777711716349631L, CHOOSE(3e-17L, 2e-16, 6e-8));
 }
 
 
@@ -3437,7 +3437,7 @@ ccosh_test (void)
   check_eps ("real(ccosh(0.7 + i 1.2)) == 0.45482...", __real__ result,
 	     0.4548202223691477654L, CHOOSE(5e-17L, 6e-17, 9e-8));
   check_eps ("imag(ccosh(0.7 + i 1.2)) == 0.70702...", __imag__ result,
-	     0.7070296600921537682L, CHOOSE(7e-17L, 0, 0));
+	     0.7070296600921537682L, CHOOSE(7e-17L, 2e-16, 0));
 
   result = FUNC(ccosh) (BUILD_COMPLEX (-2, -3));
     check_eps ("real(ccosh(-2 - i 3)) == -3.72454...", __real__ result,
@@ -3579,7 +3579,7 @@ cacos_test (void)
   check_eps ("real(cacos(0.7 + i 1.2)) == 1.13518...", __real__ result,
 	     1.1351827477151551089L, CHOOSE(2e-17L, 3e-16, 2e-7));
   check_eps ("imag(cacos(0.7 + i 1.2)) == -1.09276...", __imag__ result,
-	     -1.0927647857577371459L, CHOOSE(4e-17L, 0, 3e-7));
+	     -1.0927647857577371459L, CHOOSE(4e-17L, 3e-16, 3e-7));
 
   result = FUNC(cacos) (BUILD_COMPLEX (-2, -3));
   check_eps ("real(cacos(-2 - i 3)) == 2.14144...", __real__ result,
@@ -3717,7 +3717,7 @@ cacosh_test (void)
 
   result = FUNC(cacosh) (BUILD_COMPLEX (0.7, 1.2));
   check_eps ("real(cacosh(0.7 + i 1.2)) == 1.09276...", __real__ result,
-	     1.0927647857577371459L, CHOOSE(4e-17L, 3e-16, 0));
+	     1.0927647857577371459L, CHOOSE(4e-17L, 3e-16, 2e-7));
   check_eps ("imag(cacosh(0.7 + i 1.2)) == 1.13518...", __imag__ result,
 	 1.1351827477151551089L, CHOOSE(2e-17L, 0, 0));
 
@@ -3864,7 +3864,7 @@ casin_test (void)
   check_eps ("real(casin(0.7 + i 1.2)) == 0.43561...", __real__ result,
 	     0.4356135790797415103L, CHOOSE(2e-17L, 2e-16, 2e-7));
   check_eps ("imag(casin(0.7 + i 1.2)) == 1.09276...", __imag__ result,
-	     1.0927647857577371459L, CHOOSE(4e-17L, 0, 3e-7));
+	     1.0927647857577371459L, CHOOSE(4e-17L, 3e-16, 3e-7));
 
   result = FUNC(casin) (BUILD_COMPLEX (-2, -3));
   check_eps ("real(casin(-2 - i 3)) == -0.57065...", __real__ result,
@@ -4157,13 +4157,13 @@ catan_test (void)
 
   result = FUNC(catan) (BUILD_COMPLEX (0.7, 1.2));
   check_eps ("real(catan(0.7 + i 1.2)) == 1.07857...", __real__ result,
-	     1.0785743834118921877L, CHOOSE (3e-17, 0, 0));
+	     1.0785743834118921877L, CHOOSE (3e-17, 0, 5e-7));
   check_eps ("imag(catan(0.7 + i 1.2)) == 0.57705...", __imag__ result,
-	     0.5770573776534306764L, CHOOSE(3e-17L, 0, 6e-8));
+	     0.5770573776534306764L, CHOOSE(3e-17L, 2e-16, 6e-8));
 
   result = FUNC(catan) (BUILD_COMPLEX (-2, -3));
-  check ("real(catan(-2 - i 3)) == -1.40992...", __real__ result,
-	 -1.4099210495965755225L);
+  check_eps ("real(catan(-2 - i 3)) == -1.40992...", __real__ result,
+	     -1.4099210495965755225L, CHOOSE(0, 0, 4e-7));
   check_eps ("imag(catan(-2 - i 3)) == -0.22907...", __imag__ result,
 	     -0.2290726829685387662L, CHOOSE(1.1e-19L, 3e-17, 2e-8));
 }
@@ -4309,13 +4309,13 @@ catanh_test (void)
   check_eps ("real(catanh(0.7 + i 1.2)) == 0.26007...", __real__ result,
 	     0.2600749516525135959L, CHOOSE (2e-18, 6e-17, 0));
   check_eps ("imag(catanh(0.7 + i 1.2)) == 0.97024...", __imag__ result,
-	     0.9702403077950989849L, CHOOSE (3e-17, 0, 0));
+	     0.9702403077950989849L, CHOOSE (3e-17, 2e-16, 4e-7));
 
   result = FUNC(catanh) (BUILD_COMPLEX (-2, -3));
   check_eps ("real(catanh(-2 - i 3)) == -0.14694...", __real__ result,
-	     -0.1469466662255297520L, CHOOSE (9e-20L, 6e-17, 2e-8));
+	     -0.1469466662255297520L, CHOOSE (9e-20L, 2e-16, 2e-8));
   check_eps ("imag(catanh(-2 - i 3)) == -1.33897...", __imag__ result,
-	     -1.3389725222944935611L, CHOOSE (7e-19L, 0, 0));
+	     -1.3389725222944935611L, CHOOSE (7e-19L, 0, 5e-7));
 }
 
 
@@ -4459,11 +4459,11 @@ ctan_test (void)
   check_eps ("real(ctan(0.7 + i 1.2)) == 0.17207...", __real__ result,
 	     0.1720734197630349001L, CHOOSE(1e-17L, 3e-17, 2e-8));
   check_eps ("imag(ctan(0.7 + i 1.2)) == 0.95448...", __imag__ result,
-	     0.9544807059989405538L, CHOOSE(2e-17L, 2e-16, 0));
+	     0.9544807059989405538L, CHOOSE(2e-17L, 2e-16, 6e-8));
 
   result = FUNC(ctan) (BUILD_COMPLEX (-2, -3));
   check_eps ("real(ctan(-2 - i 3)) == -0.00376...", __real__ result,
-	     0.0037640256415042482L, CHOOSE(1e-19L, 0, 0));
+	     0.0037640256415042482L, CHOOSE(1e-19L, 5e-19, 0));
   check_eps ("imag(ctan(-2 - i 3)) == -1.00323...", __imag__ result,
 	     -1.0032386273536098014L, CHOOSE(2e-19L, 0, 2e-7));
 }
@@ -4610,15 +4610,15 @@ ctanh_test (void)
 
   result = FUNC(ctanh) (BUILD_COMPLEX (0.7, 1.2));
   check_eps ("real(ctanh(0.7 + i 1.2)) == 1.34721...", __real__ result,
-	     1.3472197399061191630L, CHOOSE(4e-17L, 3e-16, 2e-7));
+	     1.3472197399061191630L, CHOOSE(4e-17L, 5e-16, 2e-7));
   check_eps ("imag(ctanh(0.7 + i 1.2)) == -0.47786...", __imag__ result,
-	     0.4778641038326365540L, CHOOSE(9e-17L, 6e-17, 9e-8));
+	     0.4778641038326365540L, CHOOSE(9e-17L, 2e-16, 9e-8));
 
   result = FUNC(ctanh) (BUILD_COMPLEX (-2, -3));
   check_eps ("real(ctanh(-2 - i 3)) == -0.96538...", __real__ result,
-	     -0.9653858790221331242L, CHOOSE(2e-19L, 0, 0));
+	     -0.9653858790221331242L, CHOOSE(2e-19L, 2e-16, 2e-7));
   check_eps ("imag(ctanh(-2 - i 3)) == 0.00988...", __imag__ result,
-	     0.0098843750383224937L, CHOOSE(7e-20L, 0, 1e-9));
+	     0.0098843750383224937L, CHOOSE(7e-20L, 2e-16, 1e-9));
 }
 
 
@@ -4786,7 +4786,7 @@ clog_test (void)
   check_eps ("real(clog(-2 - i 3)) == 1.28247...", __real__ result,
 	     1.2824746787307683680L, CHOOSE(3e-19L, 0, 0));
   check_eps ("imag(clog(-2 - i 3)) == -2.15879...", __imag__ result,
-	     -2.1587989303424641704L, CHOOSE(2e-18L, 0, 0));
+	     -2.1587989303424641704L, CHOOSE(2e-18L, 5e-16, 8e-7));
 }
 
 
@@ -4968,7 +4968,7 @@ clog10_test (void)
   check_eps ("real(clog10(-2 - i 3)) == 0.55697...", __real__ result,
 	     0.5569716761534183846L, CHOOSE(6e-20L, 0, 0));
   check_eps ("imag(clog10(-2 - i 3)) == -0.93755...", __imag__ result,
-	     -0.9375544629863747085L, CHOOSE (7e-19L, 2e-16, 0));
+	     -0.9375544629863747085L, CHOOSE (7e-19L, 2e-16, 3e-7));
 }
 
 
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