glibc/sysdeps/libm-i387/e_scalbl.S
Ulrich Drepper 1ea89a402d Update.
1997-10-13 03:14  Ulrich Drepper  <drepper@cygnus.com>

	* libc.map: Move _IO_fopen, fopen, _IO_stdin_, _IO_stdout_,
	_IO_stderr_, _IO_list_all, and freopen to GLIBC_2.1 version.
	* include/libc-symbol.h: Define define_symbol.
	* libio/Makefile [$(versioning)=yes] (routines): Add oldiofopen and
	oldfreopen.
	[$(versioning)=yes] (aux): Add oldfileops and oldstdfiles.
	* libio/fileops.c: Use _IO_FILE_complete when accessing _offset field.
	* libio/freopen.c: Use versioning.
	* libio/iofopen.c: Likewise.  Generate object of type
	_IO_FILE_complete.
	* libio/iofopen64.c: Generate object of type _IO_FILE_complete.
	* libio/iolibio.h: Declare _IO_{old,new}_fopen and __{old,new}_freopen.
	Define _IO_old_freopen.
	* libio/libio.h: Remove _offset field from _IO_FILE.  Rename _unused2
	field to _old_offset.  Declare _IO_std*_ streams as of type
	_IO_FILE_complete.
	* libio/libioP.h: Define _IO_FILE_complete.
	Declare callbacks for old fileops implementation.
	* libio/stdfile.c: Define standard stream of type _IO_FILE_complete.
	* libio/stdio.c: Correctly address FILE part of standard streams.
	* libio/oldfileops.c: New file.
	* libio/oldfreopen.c: New file.
	* libio/oldiofopen.c: New file.
	* libio/oldstdfiles.c: New file.

	* sysdeps/i386/fpu/bits/mathinline.h: Define fma optimization.

	* sysdeps/libm-i387/e_scalb.S: Make sure code gets into .text section.
	* sysdeps/libm-i387/e_scalbl.S: Likewise.
	* sysdeps/libm-i387/s_fma.S: Fix typo.
	* sysdeps/libm-i387/s_fmaf.S: Likewise.
	* sysdeps/libm-i387/s_fmal.S: Likewise.

1997-10-12 20:14  Zack Weinberg  <zack@rabi.phys.columbia.edu>

	* sysdeps/stub/getsid.c: Add a stub_warning.
	* sysdeps/stub/mmap.c: Likewise.
	* sysdeps/stub/munmap.c: Likewise.

	* sysdeps/libm-ieee754/s_fma.c: New file.
	* sysdeps/libm-ieee754/s_fmaf.c: New file.
	* sysdeps/libm-ieee754/s_fmal.c: New file.
	* sysdeps/libm-ieee754/s_llrintf.c: New file.
	* sysdeps/libm-ieee754/s_llrintl.c: New file.
	* sysdeps/libm-ieee754/s_lrintf.c: New file.
	* sysdeps/libm-ieee754/s_lrintl.c: New file.
1997-10-13 01:27:24 +00:00

97 lines
1.5 KiB
ArmAsm

/*
* Written by J.T. Conklin <jtc@netbsd.org>.
* Public domain.
*
* Adapted for `long double' by Ulrich Drepper <drepper@cygnus.com>.
*
* Correct handling of y==-inf <drepper@gnu>
*/
#include <machine/asm.h>
RCSID("$NetBSD: $")
#ifdef __ELF__
.section .rodata
#else
.text
#endif
.align ALIGNARG(4)
ASM_TYPE_DIRECTIVE(zero_nan,@object)
zero_nan:
.double 0.0
nan: .byte 0, 0, 0, 0, 0, 0, 0xff, 0x7f
minus_zero:
.byte 0, 0, 0, 0, 0, 0, 0, 0x80
.byte 0, 0, 0, 0, 0, 0, 0xff, 0x7f
ASM_SIZE_DIRECTIVE(zero_nan)
#ifdef PIC
#define MO(op) op##@GOTOFF(%ecx)
#define MOX(op,x,f) op##@GOTOFF(%ecx,x,f)
#else
#define MO(op) op
#define MOX(op,x,f) op(,x,f)
#endif
.text
ENTRY(__ieee754_scalbl)
fldt 16(%esp)
fxam
fnstsw
fldt 4(%esp)
andl $0x4700, %eax
cmpl $0x0700, %eax
je 1f
andl $0x4500, %eax
cmpl $0x0100, %eax
je 2f
fxam
fnstsw
andl $0x4500, %eax
cmpl $0x0100, %eax
je 2f
fld %st(1)
frndint
fcomp %st(2)
fnstsw
sahf
jne 2f
fscale
fstp %st(1)
ret
/* y is -inf */
1: fxam
#ifdef PIC
call 1f
1: popl %ecx
addl $_GLOBAL_OFFSET_TABLE_+[.-1b], %ecx
#endif
fnstsw
movl 12(%esp), %edx
shrl $5, %eax
fstp %st(1)
andl $0x8000, %edx
andl $8, %eax
fstp %st(1)
shrl $11, %edx
addl %edx, %eax
fldl MOX(zero_nan, %eax, 1)
ret
/* The result is NaN, but we must not raise an exception.
So use a variable. */
2: fstp %st
fstp %st
#ifdef PIC
call 1f
1: popl %ecx
addl $_GLOBAL_OFFSET_TABLE_+[.-1b], %ecx
#endif
fldl MO(nan)
ret
END(__ieee754_scalbl)