From 4bbac92a0a58c00a8c8c99241cde3d4a3ddb3f5c Mon Sep 17 00:00:00 2001 From: Ulrich Drepper Date: Tue, 9 Jun 1998 18:24:13 +0000 Subject: Update. 1998-06-09 18:16 Ulrich Drepper * 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 * 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. --- sysdeps/libm-i387/e_exp10.S | 38 ++++++++++++++++++++++++++++++++++++++ sysdeps/libm-i387/e_exp10f.S | 38 ++++++++++++++++++++++++++++++++++++++ sysdeps/libm-i387/e_exp10l.S | 38 ++++++++++++++++++++++++++++++++++++++ 3 files changed, 114 insertions(+) create mode 100644 sysdeps/libm-i387/e_exp10.S create mode 100644 sysdeps/libm-i387/e_exp10f.S create mode 100644 sysdeps/libm-i387/e_exp10l.S (limited to 'sysdeps/libm-i387') diff --git a/sysdeps/libm-i387/e_exp10.S b/sysdeps/libm-i387/e_exp10.S new file mode 100644 index 0000000..6bfcdbb --- /dev/null +++ b/sysdeps/libm-i387/e_exp10.S @@ -0,0 +1,38 @@ +/* + * Written by Ulrich Drepper . + */ + +#include + +/* 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) diff --git a/sysdeps/libm-i387/e_exp10f.S b/sysdeps/libm-i387/e_exp10f.S new file mode 100644 index 0000000..4791b99 --- /dev/null +++ b/sysdeps/libm-i387/e_exp10f.S @@ -0,0 +1,38 @@ +/* + * Written by Ulrich Drepper. + */ + +#include + +/* e^x = 2^(x * log2(10)) */ +ENTRY(__ieee754_exp10f) + flds 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_exp10f) diff --git a/sysdeps/libm-i387/e_exp10l.S b/sysdeps/libm-i387/e_exp10l.S new file mode 100644 index 0000000..71f0da7 --- /dev/null +++ b/sysdeps/libm-i387/e_exp10l.S @@ -0,0 +1,38 @@ +/* + * Written by Ulrich Drepper . + */ + +#include + +/* e^x = 2^(x * log2l(10)) */ +ENTRY(__ieee754_exp10l) + fldt 4(%esp) +/* I added the following ugly construct because expl(+-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_exp10l) -- cgit v1.1