glibc/sysdeps/libm-i387/e_exp10.S
Ulrich Drepper 4bbac92a0a Update.
1998-06-09 18:16  Ulrich Drepper  <drepper@cygnus.com>

	* math/Makefile (libm-calls): Add w_exp10 and e_exp10.
	* math/libm.map: Add exp10{,f,l} and pow10{,f,l}.
	* math/math_private.h: Add prototypes for __ieee754_exp10{,f,l}.
	* math/bits/mathcalls.h: Add definitions for exp10 and pow10
	prototypes.
	* sysdeps/libm-i387/e_exp10.S: New file.
	* sysdeps/libm-i387/e_exp10f.S: New file.
	* sysdeps/libm-i387/e_exp10l.S: New file.
	* sysdeps/libm-ieee754/e_exp10.c: New file.
	* sysdeps/libm-ieee754/e_exp10f.c: New file.
	* sysdeps/libm-ieee754/e_exp10l.c: New file.
	* sysdeps/libm-ieee754/w_exp10.c: New file.
	* sysdeps/libm-ieee754/w_exp10f.c: New file.
	* sysdeps/libm-ieee754/w_exp10l.c: New file.
	* sysdeps/libm-ieee754/k_standard.c: Add exception code for exp10.

1998-05-25 22:18  H.J. Lu  <hjl@gnu.org>

	* sysdeps/unix/sysv/linux/i386/Makefile (sysdep_headers): Add
	sys/elf.h and sys/reg.h.
	* sysdeps/unix/sysv/linux/i386/sys/elf.h: New file.
	* sysdeps/unix/sysv/linux/i386/sys/reg.h: New file.
	* sysdeps/unix/sysv/linux/i386/sys/procfs.h: New file.
	* sysdeps/unix/sysv/linux/i386/sys/user.h: New file.

	* sysdeps/unix/sysv/linux/sys/ptrace.h (PTRACE_GETREGS,
	PTRACE_SETREGS, PTRACE_GETFPREGS, PTRACE_SETFPREGS): Added.
1998-06-09 18:24:13 +00:00

39 lines
899 B
ArmAsm

/*
* Written by Ulrich Drepper <drepper@cygnus.com>.
*/
#include <machine/asm.h>
/* 10^x = 2^(x * log2(10)) */
ENTRY(__ieee754_exp10)
fldl 4(%esp)
/* I added the following ugly construct because exp(+-Inf) resulted
in NaN. The ugliness results from the bright minds at Intel.
For the i686 the code can be written better.
-- drepper@cygnus.com. */
fxam /* Is NaN or +-Inf? */
fstsw %ax
movb $0x45, %dh
andb %ah, %dh
cmpb $0x05, %dh
je 1f /* Is +-Inf, jump. */
fldl2t
fmulp /* x * log2(10) */
fld %st
frndint /* int(x * log2(10)) */
fsubr %st,%st(1) /* fract(x * log2(10)) */
fxch
f2xm1 /* 2^(fract(x * log2(10))) - 1 */
fld1
faddp /* 2^(fract(x * log2(10))) */
fscale /* e^x */
fstp %st(1)
ret
1: testl $0x200, %eax /* Test sign. */
jz 2f /* If positive, jump. */
fstp %st
fldz /* Set result to 0. */
2: ret
END (__ieee754_exp10)