diff options
Diffstat (limited to 'sysdeps/x86_64/fpu/e_log10l.S')
| -rw-r--r-- | sysdeps/x86_64/fpu/e_log10l.S | 92 |
1 files changed, 0 insertions, 92 deletions
diff --git a/sysdeps/x86_64/fpu/e_log10l.S b/sysdeps/x86_64/fpu/e_log10l.S deleted file mode 100644 index e0cb88e32e..0000000000 --- a/sysdeps/x86_64/fpu/e_log10l.S +++ /dev/null @@ -1,92 +0,0 @@ -/* - * Written by J.T. Conklin <jtc@netbsd.org>. - * Public domain. - * - * Adapted for `long double' by Ulrich Drepper <drepper@cygnus.com>. - * - * Changed to use fyl2xp1 for values near 1, <drepper@cygnus.com>. - * Adapted for x86-64 by Andreas Jaeger <aj@suse.de>. - */ - -#include <machine/asm.h> - - .section .rodata.cst8,"aM",@progbits,8 - - .p2align 3 - .type one,@object -one: .double 1.0 - ASM_SIZE_DIRECTIVE(one) - /* It is not important that this constant is precise. It is only - a value which is known to be on the safe side for using the - fyl2xp1 instruction. */ - .type limit,@object -limit: .double 0.29 - ASM_SIZE_DIRECTIVE(limit) - - -#ifdef PIC -# define MO(op) op##(%rip) -#else -# define MO(op) op -#endif - - .text -ENTRY(__ieee754_log10l) - fldlg2 // log10(2) - fldt 8(%rsp) // x : log10(2) - fxam - fnstsw - fld %st // x : x : log10(2) - testb $1, %ah - jnz 3f // in case x is NaN or ħInf -4: fsubl MO(one) // x-1 : x : log10(2) - fld %st // x-1 : x-1 : x : log10(2) - fabs // |x-1| : x-1 : x : log10(2) - fcompl MO(limit) // x-1 : x : log10(2) - fnstsw // x-1 : x : log10(2) - andb $0x45, %ah - jz 2f - fxam - fnstsw - andb $0x45, %ah - cmpb $0x40, %ah - jne 5f - fabs // log10(1) is +0 in all rounding modes. -5: fstp %st(1) // x-1 : log10(2) - fyl2xp1 // log10(x) - ret - -2: fstp %st(0) // x : log10(2) - fyl2x // log10(x) - ret - -3: testb $4, %ah - jnz 4b // in case x is ħInf - fstp %st(1) - fstp %st(1) - fadd %st(0) - ret -END(__ieee754_log10l) - - -ENTRY(__log10l_finite) - fldlg2 // log10(2) - fldt 8(%rsp) // x : log10(2) - fld %st // x : x : log10(2) -4: fsubl MO(one) // x-1 : x : log10(2) - fld %st // x-1 : x-1 : x : log10(2) - fabs // |x-1| : x-1 : x : log10(2) - fcompl MO(limit) // x-1 : x : log10(2) - fnstsw // x-1 : x : log10(2) - andb $0x45, %ah - jz 2b - fxam - fnstsw - andb $0x45, %ah - cmpb $0x40, %ah - jne 6f - fabs // log10(1) is +0 in all rounding modes. -6: fstp %st(1) // x-1 : log10(2) - fyl2xp1 // log10(x) - ret -END(__log10l_finite) |