mirror of
git://sourceware.org/git/glibc.git
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* 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.
This commit is contained in:
Ulrich Drepper
parent
2120860435
commit
aece054b30
@ -1,3 +1,12 @@
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2007-10-26 Steven Munroe <sjmunroe@us.ibm.com>
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* sysdeps/powerpc/powerpc32/power4/fpu/w_sqrt.S: New File.
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* sysdeps/powerpc/powerpc32/power4/fpu/w_sqrt.c: Removed.
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* sysdeps/powerpc/powerpc32/power4/fpu/w_sqrtf.S: New File.
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* sysdeps/powerpc/powerpc32/power4/fpu/w_sqrtf.c: Removed.
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* sysdeps/powerpc/powerpc32/power5/fpu/w_sqrt.S: New File.
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* sysdeps/powerpc/powerpc32/power5/fpu/w_sqrtf.S: New File.
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2008-04-09 Ulrich Drepper <drepper@redhat.com>
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2008-04-09 Ulrich Drepper <drepper@redhat.com>
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[BZ #4314]
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[BZ #4314]
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28
NEWS
28
NEWS
@ -1,5 +1,5 @@
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|||||||
GNU C Library NEWS -- history of user-visible changes. 2007-12-12
|
GNU C Library NEWS -- history of user-visible changes. 2008-4-9
|
||||||
Copyright (C) 1992-2006, 2007 Free Software Foundation, Inc.
|
Copyright (C) 1992-2007, 2008 Free Software Foundation, Inc.
|
||||||
See the end for copying conditions.
|
See the end for copying conditions.
|
||||||
|
|
||||||
Please send GNU C library bug reports via <http://sources.redhat.com/bugzilla/>
|
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 locales: bo_CN, bo_IN.
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||||||
|
|
||||||
* New encoding: HP-ROMAN9, HP-GREEK8, HP-THAI8, HP-TURKISH8.
|
* 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.
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||||||
|
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||||||
|
* 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.
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||||||
|
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||||||
|
* 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.
|
||||||
|
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||||||
Version 2.7
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Version 2.7
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||||||
|
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||||||
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|||||||
119
sysdeps/powerpc/powerpc32/power4/fpu/w_sqrt.S
Normal file
119
sysdeps/powerpc/powerpc32/power4/fpu/w_sqrt.S
Normal file
@ -0,0 +1,119 @@
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|||||||
|
/* sqrt function. PowerPC32 version.
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||||||
|
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. */
|
||||||
|
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||||||
|
#include <sysdep.h>
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||||||
|
#include <math_ldbl_opt.h>
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||||||
|
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||||||
|
/* 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. */
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||||||
|
|
||||||
|
.section ".text"
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|
.machine power4
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||||||
|
EALIGN (__sqrt, 5, 0)
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||||||
|
fsqrt fp2,fp1
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||||||
|
mcrfs cr1,4
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|
bso- cr1,.Lw_sqrt
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||||||
|
fmr fp1,fp2
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|
blr
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|
.align 4
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|
.Lw_sqrt:
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||||||
|
mflr r0
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|
stwu r1,-16(r1)
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|
cfi_adjust_cfa_offset(16)
|
||||||
|
fmr fp12,fp2
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||||||
|
stw r0,20(r1)
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|
stw r30,8(r1)
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||||||
|
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)
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|
return __kernel_standard (x, x, 26) */
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|
fmr fp2,fp1
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|
fabs fp0,fp1
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|
li r3,26
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|
fcmpu cr7,fp1,fp0
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||||||
|
bne- cr7,.L11
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|
.L4:
|
||||||
|
lwz r0,20(r1)
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|
fmr fp1,fp12
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|
lwz r30,8(r1)
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||||||
|
addi r1,r1,16
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|
mtlr r0
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|
blr
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|
.L11:
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|
bl __kernel_standard@plt
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|
fmr fp12,fp1
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|
b .L4
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|
END (__sqrt)
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||||||
|
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||||||
|
weak_alias (__sqrt, sqrt)
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|
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||||||
|
#ifdef NO_LONG_DOUBLE
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||||||
|
weak_alias (__sqrt, sqrtl)
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|
strong_alias (__sqrt, __sqrtl)
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||||||
|
#endif
|
||||||
|
#if LONG_DOUBLE_COMPAT(libm, GLIBC_2_0)
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||||||
|
compat_symbol (libm, __sqrt, sqrtl, GLIBC_2_0)
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|
#endif
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||||||
|
|
||||||
@ -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
|
|
||||||
111
sysdeps/powerpc/powerpc32/power4/fpu/w_sqrtf.S
Normal file
111
sysdeps/powerpc/powerpc32/power4/fpu/w_sqrtf.S
Normal file
@ -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)
|
||||||
|
|
||||||
@ -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)
|
|
||||||
117
sysdeps/powerpc/powerpc32/power5/fpu/w_sqrt.S
Normal file
117
sysdeps/powerpc/powerpc32/power5/fpu/w_sqrt.S
Normal file
@ -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
|
||||||
|
|
||||||
109
sysdeps/powerpc/powerpc32/power5/fpu/w_sqrtf.S
Normal file
109
sysdeps/powerpc/powerpc32/power5/fpu/w_sqrtf.S
Normal file
@ -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)
|
||||||
|
|
||||||
Loading…
Reference in New Issue
Block a user