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-rw-r--r--ChangeLog9
-rw-r--r--NEWS28
-rw-r--r--sysdeps/powerpc/powerpc32/power4/fpu/w_sqrt.S119
-rw-r--r--sysdeps/powerpc/powerpc32/power4/fpu/w_sqrt.c62
-rw-r--r--sysdeps/powerpc/powerpc32/power4/fpu/w_sqrtf.S111
-rw-r--r--sysdeps/powerpc/powerpc32/power4/fpu/w_sqrtf.c60
-rw-r--r--sysdeps/powerpc/powerpc32/power5/fpu/w_sqrt.S117
-rw-r--r--sysdeps/powerpc/powerpc32/power5/fpu/w_sqrtf.S109
8 files changed, 491 insertions, 124 deletions
diff --git a/ChangeLog b/ChangeLog
index 38efd89295..247c79247f 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,12 @@
+2007-10-26  Steven Munroe  <sjmunroe@us.ibm.com>
+
+	* sysdeps/powerpc/powerpc32/power4/fpu/w_sqrt.S: New File.
+	* sysdeps/powerpc/powerpc32/power4/fpu/w_sqrt.c: Removed.
+	* sysdeps/powerpc/powerpc32/power4/fpu/w_sqrtf.S: New File.
+	* sysdeps/powerpc/powerpc32/power4/fpu/w_sqrtf.c: Removed.
+	* sysdeps/powerpc/powerpc32/power5/fpu/w_sqrt.S: New File.
+	* sysdeps/powerpc/powerpc32/power5/fpu/w_sqrtf.S: New File.
+
 2008-04-09  Ulrich Drepper  <drepper@redhat.com>
 
 	[BZ #4314]
diff --git a/NEWS b/NEWS
index 1f56704135..c048213fb0 100644
--- a/NEWS
+++ b/NEWS
@@ -1,5 +1,5 @@
-GNU C Library NEWS -- history of user-visible changes.  2007-12-12
-Copyright (C) 1992-2006, 2007 Free Software Foundation, Inc.
+GNU C Library NEWS -- history of user-visible changes.  2008-4-9
+Copyright (C) 1992-2007, 2008 Free Software Foundation, Inc.
 See the end for copying conditions.
 
 Please send GNU C library bug reports via <http://sources.redhat.com/bugzilla/>
@@ -10,6 +10,30 @@ Version 2.8
 * New locales: bo_CN, bo_IN.
 
 * New encoding: HP-ROMAN9, HP-GREEK8, HP-THAI8, HP-TURKISH8.
+
+* Sorting rules for some Indian languages (Devanagari and Gujarati).
+  Implemented by Pravin Satpute.
+
+* IPV6 addresses in /etc/resolv.conf can now have a scope ID
+
+* nscd caches now all timeouts for DNS entries
+  Implemented by Ulrich Drepper.
+
+* nscd is more efficient and wakes up less often.
+  Implemented by Ulrich Drepper.
+
+* More checking functions: asprintf, dprintf, obstack_printf, vasprintf,
+  vdprintf, and obstack_vprintf.
+  Implemented by Jakub Jelinek.
+
+* Faster memset for x86-64.
+  Implemented by Harsha Jagasia and H.J. Lu.
+
+* Faster memcpy on x86.
+  Implemented by Ulrich Drepper.
+
+* ARG_MAX is not anymore constant on Linux.  Use sysconf(_SC_ARG_MAX).
+  Implemented by Ulrich Drepper.
 
 Version 2.7
 
diff --git a/sysdeps/powerpc/powerpc32/power4/fpu/w_sqrt.S b/sysdeps/powerpc/powerpc32/power4/fpu/w_sqrt.S
new file mode 100644
index 0000000000..6aef4e301b
--- /dev/null
+++ b/sysdeps/powerpc/powerpc32/power4/fpu/w_sqrt.S
@@ -0,0 +1,119 @@
+/* sqrt function.  PowerPC32 version.
+   Copyright (C) 2007 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 Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 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
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, write to the Free
+   Software Foundation, Inc., 1 Franklin Street, Fifth Floor, Boston MA
+   02110-1301 USA.  */
+
+#include <sysdep.h>
+#include <math_ldbl_opt.h>
+
+/* double [fp1] sqrt (double x [fp1])
+   Power4 (ISA V2.0) and above implement sqrt in hardware (not optional).
+   The fsqrt instruction generates the correct value for all inputs and
+   sets the appropriate floating point exceptions.  Extented checking is
+   only needed to set errno (via __kernel_standard) if the input value
+   is negative.
+   
+   The fsqrt will set FPCC and FU (Floating Point Unordered or NaN
+   to indicated that the input value was negative or NaN. Use Move to
+   Condition Register from FPSCR to copy the FPCC field to cr1.  The
+   branch on summary overflow transfers control to w_sqrt to process
+   any error conditions. Otherwise we can return the result directly.
+   
+   This part of the function is a leaf routine,  so no need to stack a
+   frame or execute prologue/epilogue code. This means it is safe to
+   transfer directly to w_sqrt as long as the input value (f1) is
+   preserved. Putting the the sqrt result into f2 (double parameter 2)
+   allows passing both the input value and sqrt result into the extended
+   wrapper so there is no need to recompute.
+   
+   This tactic avoids the overhead of stacking a frame for the normal
+   (non-error) case.  Until gcc supports prologue shrink-wrapping
+   this is the best we can do.  */
+
+	.section	".text"
+	.machine power4
+EALIGN (__sqrt, 5, 0)
+	fsqrt	fp2,fp1
+	mcrfs	cr1,4
+	bso-	cr1,.Lw_sqrt
+	fmr	fp1,fp2
+	blr
+	.align	4
+.Lw_sqrt:
+	mflr	r0
+	stwu	r1,-16(r1)
+	cfi_adjust_cfa_offset(16)
+	fmr	fp12,fp2
+	stw	r0,20(r1)
+	stw	r30,8(r1)
+	cfi_offset(lr,20)
+	cfi_offset(r30,8)
+#ifdef SHARED
+# ifdef HAVE_ASM_PPC_REL16
+	bcl	20,31,.LCF1
+.LCF1:
+	mflr	r30
+	addis	r30,r30,_GLOBAL_OFFSET_TABLE_-.LCF1@ha
+	addi	r30,r30,_GLOBAL_OFFSET_TABLE_-.LCF1@l
+	lwz	r9,_LIB_VERSION@got(30)
+	lwz	r0,0(r9)
+# else
+	bl	_GLOBAL_OFFSET_TABLE_@local-4
+	mflr	r30
+	lwz	r9,_LIB_VERSION@got(30)
+	lwz	r0,0(r9)
+# endif
+#else
+	lis	r9,_LIB_VERSION@ha
+	lwz	r0,_LIB_VERSION@l(r9)
+#endif
+/*  if (_LIB_VERSION == _IEEE_) return z; */
+	cmpwi	cr7,r0,-1
+	beq-	cr7,.L4
+/*  if (x != x) return z; !isnan*/
+	fcmpu	cr7,fp1,fp1
+	bne-	cr7,.L4
+/*  if  (x < 0.0)
+    return __kernel_standard (x, x, 26) */
+	fmr	fp2,fp1
+	fabs	fp0,fp1
+	li	r3,26
+	fcmpu	cr7,fp1,fp0
+	bne- 	cr7,.L11
+.L4:
+	lwz	r0,20(r1)
+	fmr	fp1,fp12
+	lwz	r30,8(r1)
+	addi	r1,r1,16
+	mtlr 	r0
+	blr
+.L11:
+	bl	__kernel_standard@plt
+	fmr	fp12,fp1
+	b	.L4
+	END	(__sqrt)
+
+weak_alias (__sqrt, sqrt)
+
+#ifdef NO_LONG_DOUBLE
+weak_alias (__sqrt, sqrtl)
+strong_alias (__sqrt, __sqrtl)
+#endif
+#if LONG_DOUBLE_COMPAT(libm, GLIBC_2_0)
+compat_symbol (libm, __sqrt, sqrtl, GLIBC_2_0)
+#endif
+
diff --git a/sysdeps/powerpc/powerpc32/power4/fpu/w_sqrt.c b/sysdeps/powerpc/powerpc32/power4/fpu/w_sqrt.c
deleted file mode 100644
index f59c193934..0000000000
--- a/sysdeps/powerpc/powerpc32/power4/fpu/w_sqrt.c
+++ /dev/null
@@ -1,62 +0,0 @@
-/* Double-precision floating point square root wrapper.
-   Copyright (C) 2004, 2007 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 Lesser General Public
-   License as published by the Free Software Foundation; either
-   version 2.1 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
-   Lesser General Public License for more details.
-
-   You should have received a copy of the GNU Lesser General Public
-   License along with the GNU C Library; if not, write to the Free
-   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
-   02111-1307 USA.  */
-
-#include <math_ldbl_opt.h>
-#include "math.h"
-#include "math_private.h"
-#include <fenv_libc.h>
-
-#ifdef __STDC__
-double
-__sqrt (double x)		/* wrapper sqrt */
-#else
-double
-__sqrt (x)			/* wrapper sqrt */
-     double x;
-#endif
-{
-  double z;
-/* Power4 (ISA V2.0) and above implement sqrt in hardware.  */
-   __asm __volatile (
-	"	fsqrt	%0,%1\n"
-		: "=f" (z)
-		: "f" (x));
-#ifdef _IEEE_LIBM
-  return z;
-#else
-  if (__builtin_expect (_LIB_VERSION == _IEEE_, 0))
-    return z;
-    
-  if (__builtin_expect (x != x, 0))
-    return z;
-
-  if  (__builtin_expect (x < 0.0, 0))
-    return __kernel_standard (x, x, 26);	/* sqrt(negative) */
-  else
-    return z;
-#endif
-}
-
-weak_alias (__sqrt, sqrt)
-#ifdef NO_LONG_DOUBLE
-  strong_alias (__sqrt, __sqrtl) weak_alias (__sqrt, sqrtl)
-#endif
-#if LONG_DOUBLE_COMPAT(libm, GLIBC_2_0)
-compat_symbol (libm, __sqrt, sqrtl, GLIBC_2_0);
-#endif
diff --git a/sysdeps/powerpc/powerpc32/power4/fpu/w_sqrtf.S b/sysdeps/powerpc/powerpc32/power4/fpu/w_sqrtf.S
new file mode 100644
index 0000000000..e5b8b9d565
--- /dev/null
+++ b/sysdeps/powerpc/powerpc32/power4/fpu/w_sqrtf.S
@@ -0,0 +1,111 @@
+/* sqrtf function.  PowerPC32 version.
+   Copyright (C) 2007 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 Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 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
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, write to the Free
+   Software Foundation, Inc., 1 Franklin Street, Fifth Floor, Boston MA
+   02110-1301 USA.  */
+
+#include <sysdep.h>
+#include <math_ldbl_opt.h>
+
+/* float [fp1] sqrts (float x [fp1])
+   Power4 (ISA V2.0) and above implement sqrt in hardware (not optional).
+   The fsqrts instruction generates the correct value for all inputs and
+   sets the appropriate floating point exceptions.  Extented checking is
+   only needed to set errno (via __kernel_standard) if the input value
+   is negative.
+   
+   The fsqrts will set FPCC and FU (Floating Point Unordered or NaN
+   to indicated that the input value was negative or NaN. Use Move to
+   Condition Register from FPSCR to copy the FPCC field to cr1.  The
+   branch on summary overflow transfers control to w_sqrt to process
+   any error conditions. Otherwise we can return the result directly.
+   
+   This part of the function is a leaf routine,  so no need to stack a
+   frame or execute prologue/epilogue code. This means it is safe to
+   transfer directly to w_sqrt as long as the input value (f1) is
+   preserved. Putting the the sqrt result into f2 (float parameter 2)
+   allows passing both the input value and sqrt result into the extended
+   wrapper so there is no need to recompute.
+   
+   This tactic avoids the overhead of stacking a frame for the normal
+   (non-error) case.  Until gcc supports prologue shrink-wrapping
+   this is the best we can do.  */
+
+	.section	".text"
+	.machine power4
+EALIGN (__sqrtf, 5, 0)
+	fsqrts	fp2,fp1
+	mcrfs	cr1,4
+	bso-	cr1,.Lw_sqrtf
+	fmr	fp1,fp2
+	blr
+        .align 4
+.Lw_sqrtf:
+	mflr	r0
+	stwu	r1,-16(r1)
+	cfi_adjust_cfa_offset(16)
+	fmr	fp12,fp2
+	stw	r0,20(r1)
+	stw	r30,8(r1)
+	cfi_offset(lr,20)
+	cfi_offset(r30,8)
+#ifdef SHARED
+# ifdef HAVE_ASM_PPC_REL16
+	bcl	20,31,.LCF1
+.LCF1:
+	mflr	r30
+	addis	r30,r30,_GLOBAL_OFFSET_TABLE_-.LCF1@ha
+	addi	r30,r30,_GLOBAL_OFFSET_TABLE_-.LCF1@l
+	lwz	r9,_LIB_VERSION@got(30)
+	lwz	r0,0(r9)
+# else
+	bl	_GLOBAL_OFFSET_TABLE_@local-4
+	mflr	r30
+	lwz	r9,_LIB_VERSION@got(30)
+	lwz	r0,0(r9)
+# endif
+#else
+	lis	r9,_LIB_VERSION@ha
+	lwz	r0,_LIB_VERSION@l(r9)
+#endif
+/*  if (_LIB_VERSION == _IEEE_) return z; */
+	cmpwi	cr7,r0,-1
+	beq-	cr7,.L4
+/*  if (x != x, 0) return z; !isnan */
+	fcmpu	cr7,fp1,fp1
+	bne-	cr7,.L4
+/*  if  (x < 0.0)
+    return __kernel_standard (x, x, 126) */
+	fmr	fp2,fp1
+	fabs	fp0,fp1
+	li	r3,126
+	fcmpu	cr7,1,0
+	bne- 	cr7,.L11
+.L4:
+	lwz	r0,20(r1)
+	fmr	fp1,fp12
+	lwz	r30,8(r1)
+	addi	r1,r1,16
+	mtlr 	r0
+	blr
+.L11:
+	bl	__kernel_standard@plt
+	fmr	fp12,fp1
+	b	.L4
+	END	(__sqrtf)
+
+weak_alias (__sqrtf, sqrtf)
+
diff --git a/sysdeps/powerpc/powerpc32/power4/fpu/w_sqrtf.c b/sysdeps/powerpc/powerpc32/power4/fpu/w_sqrtf.c
deleted file mode 100644
index 4784869f07..0000000000
--- a/sysdeps/powerpc/powerpc32/power4/fpu/w_sqrtf.c
+++ /dev/null
@@ -1,60 +0,0 @@
-/* Single-precision floating point square root wrapper.
-   Copyright (C) 2004, 2007 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 Lesser General Public
-   License as published by the Free Software Foundation; either
-   version 2.1 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
-   Lesser General Public License for more details.
-
-   You should have received a copy of the GNU Lesser General Public
-   License along with the GNU C Library; if not, write to the Free
-   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
-   02111-1307 USA.  */
-
-#include "math.h"
-#include "math_private.h"
-#include <fenv_libc.h>
-
-#include <sysdep.h>
-#include <ldsodefs.h>
-
-#ifdef __STDC__
-float
-__sqrtf (float x)		/* wrapper sqrtf */
-#else
-float
-__sqrtf (x)			/* wrapper sqrtf */
-     float x;
-#endif
-{
-#ifdef _IEEE_LIBM
-  return __ieee754_sqrtf (x);
-#else
-  float z;
-/* Power4 (ISA V2.0) and above implement sqrtf in hardware.  */
-   __asm __volatile (
-	"	fsqrts	%0,%1\n"
-		: "=f" (z)
-		: "f" (x));
-
-  if (__builtin_expect (_LIB_VERSION == _IEEE_, 0))
-    return z;
-    
-  if (__builtin_expect (x != x, 0))
-    return z;
-    
-  if  (__builtin_expect (x < 0.0, 0))
-    /* sqrtf(negative) */
-    return (float) __kernel_standard ((double) x, (double) x, 126);
-  else
-    return z;
-#endif
-}
-
-weak_alias (__sqrtf, sqrtf)
diff --git a/sysdeps/powerpc/powerpc32/power5/fpu/w_sqrt.S b/sysdeps/powerpc/powerpc32/power5/fpu/w_sqrt.S
new file mode 100644
index 0000000000..925930bf77
--- /dev/null
+++ b/sysdeps/powerpc/powerpc32/power5/fpu/w_sqrt.S
@@ -0,0 +1,117 @@
+/* sqrt function.  PowerPC32 version.
+   Copyright (C) 2007 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 Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 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
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, write to the Free
+   Software Foundation, Inc., 1 Franklin Street, Fifth Floor, Boston MA
+   02110-1301 USA.  */
+
+#include <sysdep.h>
+#include <math_ldbl_opt.h>
+
+/* double [fp1] sqrt (double x [fp1])
+   Power4 (ISA V2.0) and above implement sqrt in hardware (not optional).
+   The fsqrt instruction generates the correct value for all inputs and
+   sets the appropriate floating point exceptions.  Extented checking is
+   only needed to set errno (via __kernel_standard) if the input value
+   is negative.
+   
+   So compare the input value against the absolute value of itself.
+   This will compare equal unless the value is negative (EDOM) or a NAN,
+   in which case we branch to the extend wrapper.  If equal we can return
+   the result directly.
+   
+   This part of the function looks like a leaf routine,  so no need to
+   stack a frame or execute prologue/epilogue code. It is safe to
+   branch directly to w_sqrt as long as the input value (f1) is
+   preserved. Putting the the sqrt result into f2 (float parameter 2)
+   allows passing both the input value and sqrt result into the extended
+   wrapper so there is no need to recompute.
+   
+   This tactic avoids the overhead of stacking a frame for the normal
+   (non-error) case.  Until gcc supports prologue shrink-wrapping
+   this is the best we can do.  */
+
+	.section	".text"
+	.machine power4
+EALIGN (__sqrt, 5, 0)
+	fabs	fp0,fp1
+	fsqrt	fp2,fp1
+	fcmpu	cr1,fp0,fp1
+	bne-	cr1,.Lw_sqrt
+	fmr	fp1,fp2
+	blr
+	.align	4
+.Lw_sqrt:
+	mflr	r0
+	stwu	r1,-16(r1)
+	cfi_adjust_cfa_offset(16)
+	fmr	fp12,fp2
+	stw	r0,20(r1)
+	stw	r30,8(r1)
+	cfi_offset(lr,20)
+	cfi_offset(r30,8)
+#ifdef SHARED
+# ifdef HAVE_ASM_PPC_REL16
+	bcl	20,31,.LCF1
+.LCF1:
+	mflr	r30
+	addis	r30,r30,_GLOBAL_OFFSET_TABLE_-.LCF1@ha
+	addi	r30,r30,_GLOBAL_OFFSET_TABLE_-.LCF1@l
+	lwz	r9,_LIB_VERSION@got(30)
+	lwz	r0,0(r9)
+# else
+	bl	_GLOBAL_OFFSET_TABLE_@local-4
+	mflr	r30
+	lwz	r9,_LIB_VERSION@got(30)
+	lwz	r0,0(r9)
+# endif
+#else
+	lis	r9,_LIB_VERSION@ha
+	lwz	r0,_LIB_VERSION@l(r9)
+#endif
+/*  if (_LIB_VERSION == _IEEE_) return z; */
+	cmpwi	cr7,r0,-1
+	beq-	cr7,.L4
+/*  if (x != x) return z; !isnan*/
+	fcmpu	cr7,fp1,fp1
+	bne-	cr7,.L4
+/*  if  (x < 0.0)
+    return __kernel_standard (x, x, 26) */
+	fmr	fp2,fp1
+	li	r3,26
+	bne- 	cr1,.L11
+.L4:
+	lwz	r0,20(r1)
+	fmr	fp1,fp12
+	lwz	r30,8(r1)
+	addi	r1,r1,16
+	mtlr 	r0
+	blr
+.L11:
+	bl	__kernel_standard@plt
+	fmr	fp12,fp1
+	b	.L4
+	END	(__sqrt)
+
+weak_alias (__sqrt, sqrt)
+
+#ifdef NO_LONG_DOUBLE
+weak_alias (__sqrt, sqrtl)
+strong_alias (__sqrt, __sqrtl)
+#endif
+#if LONG_DOUBLE_COMPAT(libm, GLIBC_2_0)
+compat_symbol (libm, __sqrt, sqrtl, GLIBC_2_0)
+#endif
+
diff --git a/sysdeps/powerpc/powerpc32/power5/fpu/w_sqrtf.S b/sysdeps/powerpc/powerpc32/power5/fpu/w_sqrtf.S
new file mode 100644
index 0000000000..891e69c9c0
--- /dev/null
+++ b/sysdeps/powerpc/powerpc32/power5/fpu/w_sqrtf.S
@@ -0,0 +1,109 @@
+/* sqrtf function.  PowerPC32 version.
+   Copyright (C) 2007 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 Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 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
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, write to the Free
+   Software Foundation, Inc., 1 Franklin Street, Fifth Floor, Boston MA
+   02110-1301 USA.  */
+
+#include <sysdep.h>
+#include <math_ldbl_opt.h>
+
+/* float [fp1] sqrts (float x [fp1])
+   Power4 (ISA V2.0) and above implement sqrt in hardware (not optional).
+   The fsqrts instruction generates the correct value for all inputs and
+   sets the appropriate floating point exceptions.  Extented checking is
+   only needed to set errno (via __kernel_standard) if the input value
+   is negative.
+   
+   So compare the input value against the absolute value of itself.
+   This will compare equal unless the value is negative (EDOM) or a NAN,
+   in which case we branch to the extend wrapper.  If equal we can return
+   the result directly.
+   
+   This part of the function looks like a leaf routine,  so no need to
+   stack a frame or execute prologue/epilogue code. It is safe to
+   branch directly to w_sqrt as long as the input value (f1) is
+   preserved. Putting the the sqrt result into f2 (float parameter 2)
+   allows passing both the input value and sqrt result into the extended
+   wrapper so there is no need to recompute.
+   
+   This tactic avoids the overhead of stacking a frame for the normal
+   (non-error) case.  Until gcc supports prologue shrink-wrapping
+   this is the best we can do.  */
+
+	.section	".text"
+	.machine power4
+EALIGN (__sqrtf, 5, 0)
+	fabs	fp0,fp1
+	fsqrts	fp2,fp1
+	fcmpu	cr1,fp0,fp1
+	bne-	cr1,.Lw_sqrtf
+	fmr	fp1,fp2
+	blr
+        .align 4
+.Lw_sqrtf:
+	mflr	r0
+	stwu	r1,-16(r1)
+	cfi_adjust_cfa_offset(16)
+	fmr	fp12,fp2
+	stw	r0,20(r1)
+	stw	r30,8(r1)
+	cfi_offset(lr,20)
+	cfi_offset(r30,8)
+#ifdef SHARED
+# ifdef HAVE_ASM_PPC_REL16
+	bcl	20,31,.LCF1
+.LCF1:
+	mflr	r30
+	addis	r30,r30,_GLOBAL_OFFSET_TABLE_-.LCF1@ha
+	addi	r30,r30,_GLOBAL_OFFSET_TABLE_-.LCF1@l
+	lwz	r9,_LIB_VERSION@got(30)
+	lwz	r0,0(r9)
+# else
+	bl	_GLOBAL_OFFSET_TABLE_@local-4
+	mflr	r30
+	lwz	r9,_LIB_VERSION@got(30)
+	lwz	r0,0(r9)
+# endif
+#else
+	lis	r9,_LIB_VERSION@ha
+	lwz	r0,_LIB_VERSION@l(r9)
+#endif
+/*  if (_LIB_VERSION == _IEEE_) return z; */
+	cmpwi	cr7,r0,-1
+	beq-	cr7,.L4
+/*  if (x != x, 0) return z; !isnan */
+	fcmpu	cr7,fp1,fp1
+	bne-	cr7,.L4
+/*  if  (x < 0.0)
+    return __kernel_standard (x, x, 126) */
+	fmr	fp2,fp1
+	li	r3,126
+	bne- 	cr1,.L11
+.L4:
+	lwz	r0,20(r1)
+	fmr	fp1,fp12
+	lwz	r30,8(r1)
+	addi	r1,r1,16
+	mtlr 	r0
+	blr
+.L11:
+	bl	__kernel_standard@plt
+	fmr	fp12,fp1
+	b	.L4
+	END	(__sqrtf)
+
+weak_alias (__sqrtf, sqrtf)
+
generated by cgit-pink 1.4.1 (git 2.36.1) at 2024-11-15 05:33:14 +0000