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| author | Ulrich Drepper <drepper@redhat.com> | 1998-06-09 18:24:13 +0000 |
|---|---|---|
| committer | Ulrich Drepper <drepper@redhat.com> | 1998-06-09 18:24:13 +0000 |
| commit | 4bbac92a0a58c00a8c8c99241cde3d4a3ddb3f5c (patch) | |
| tree | 4557a7d8b1e9402e5ad426280f3bcdd33a68b742 /sysdeps/libm-i387/e_exp10.S | |
| parent | 69f234e8ff029cdd0ee7f91df7bcd006bbcab42f (diff) | |
| download | glibc-4bbac92a0a58c00a8c8c99241cde3d4a3ddb3f5c.tar.gz glibc-4bbac92a0a58c00a8c8c99241cde3d4a3ddb3f5c.tar.xz glibc-4bbac92a0a58c00a8c8c99241cde3d4a3ddb3f5c.zip | |
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.
Diffstat (limited to 'sysdeps/libm-i387/e_exp10.S')
| -rw-r--r-- | sysdeps/libm-i387/e_exp10.S | 38 |
1 files changed, 38 insertions, 0 deletions
diff --git a/sysdeps/libm-i387/e_exp10.S b/sysdeps/libm-i387/e_exp10.S new file mode 100644 index 0000000000..6bfcdbb723 --- /dev/null +++ b/sysdeps/libm-i387/e_exp10.S @@ -0,0 +1,38 @@ +/* + * 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) |