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added trunc, truncf (and truncl on x86) from glibc

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should help on bug #1260


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@21350 a95241bf-73f2-0310-859d-f6bbb57e9c96
This commit is contained in:
Jérôme Duval
2007-06-08 18:33:02 +00:00
parent d9be8bc0fe
commit 583b66bf18
7 changed files with 223 additions and 0 deletions
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src/system/libroot/posix/glibc/arch/generic/s_trunc.c
+61
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@@ -0,0 +1,61 @@
/* Truncate argument to nearest integral value not larger than the argument.
Copyright (C) 1997, 1998 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Ulrich Drepper <[email protected]>, 1997.
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"
double
__trunc (double x)
{
int32_t i0, j0;
u_int32_t i1;
int sx;
EXTRACT_WORDS (i0, i1, x);
sx = i0 & 0x80000000;
j0 = ((i0 >> 20) & 0x7ff) - 0x3ff;
if (j0 < 20)
{
if (j0 < 0)
/* The magnitude of the number is < 1 so the result is +-0. */
INSERT_WORDS (x, sx, 0);
else
INSERT_WORDS (x, sx | (i0 & ~(0x000fffff >> j0)), 0);
}
else if (j0 > 51)
{
if (j0 == 0x400)
/* x is inf or NaN. */
return x + x;
}
else
{
INSERT_WORDS (x, i0, i1 & ~(0xffffffffu >> (j0 - 20)));
}
return x;
}
weak_alias (__trunc, trunc)
#ifdef NO_LONG_DOUBLE
strong_alias (__trunc, __truncl)
weak_alias (__trunc, truncl)
#endif
src/system/libroot/posix/glibc/arch/generic/s_truncf.c
+52
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@@ -0,0 +1,52 @@
/* Truncate argument to nearest integral value not larger than the argument.
Copyright (C) 1997, 1998 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Ulrich Drepper <[email protected]>, 1997.
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"
float
__truncf (float x)
{
int32_t i0, j0;
int sx;
GET_FLOAT_WORD (i0, x);
sx = i0 & 0x80000000;
j0 = ((i0 >> 23) & 0xff) - 0x7f;
if (j0 < 23)
{
if (j0 < 0)
/* The magnitude of the number is < 1 so the result is +-0. */
SET_FLOAT_WORD (x, sx);
else
SET_FLOAT_WORD (x, sx | (i0 & ~(0x007fffff >> j0)));
}
else
{
if (j0 == 0x80)
/* x is inf or NaN. */
return x + x;
}
return x;
}
weak_alias (__truncf, truncf)
src/system/libroot/posix/glibc/arch/ppc/Jamfile
+1
View File
@@ -88,6 +88,7 @@ local genericSources =
s_sincos.c s_sincosf.c
s_tan.c s_tanf.c
s_tanh.c s_tanhf.c
s_trunc.c s_truncf.c
t_exp.c
w_acos.c w_acosf.c # w_acosl.c
w_acosh.c w_acoshf.c # w_acoshl.c
src/system/libroot/posix/glibc/arch/x86/Jamfile
+1
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@@ -157,6 +157,7 @@ MergeObject posix_gnu_arch_$(TARGET_ARCH)_s.o :
s_sin.S s_sinf.S s_sinl.S
s_sincos.S s_sincosf.S s_sincosl.S
s_tan.S s_tanf.S s_tanl.S
s_trunc.S s_truncf.S s_truncl.S
;
MergeObject posix_gnu_arch_$(TARGET_ARCH)_generic.o :
src/system/libroot/posix/glibc/arch/x86/s_trunc.S
+36
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@@ -0,0 +1,36 @@
/* Truncate double value.
Copyright (C) 1997 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997.
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 <machine/asm.h>
ENTRY(__trunc)
fldl 4(%esp)
subl $8, %esp
fstcw 4(%esp)
movl $0xc00, %edx
orl 4(%esp), %edx
movl %edx, (%esp)
fldcw (%esp)
frndint
fldcw 4(%esp)
addl $8, %esp
ret
END(__trunc)
weak_alias (__trunc, trunc)
src/system/libroot/posix/glibc/arch/x86/s_truncf.S
+36
View File
@@ -0,0 +1,36 @@
/* Truncate float value.
Copyright (C) 1997 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997.
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 <machine/asm.h>
ENTRY(__truncf)
flds 4(%esp)
subl $8, %esp
fstcw 4(%esp)
movl $0xc00, %edx
orl 4(%esp), %edx
movl %edx, (%esp)
fldcw (%esp)
frndint
fldcw 4(%esp)
addl $8, %esp
ret
END(__truncf)
weak_alias (__truncf, truncf)
src/system/libroot/posix/glibc/arch/x86/s_truncl.S
+36
View File
@@ -0,0 +1,36 @@
/* Truncate long double value.
Copyright (C) 1997 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997.
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 <machine/asm.h>
ENTRY(__truncl)
fldt 4(%esp)
subl $8, %esp
fstcw 4(%esp)
movl $0xc00, %edx
orl 4(%esp), %edx
movl %edx, (%esp)
fldcw (%esp)
frndint
fldcw 4(%esp)
addl $8, %esp
ret
END(__truncl)
weak_alias (__truncl, truncl)