diff options
Diffstat (limited to 'sysdeps/x86_64/fpu/e_logl.S')
| -rw-r--r-- | sysdeps/x86_64/fpu/e_logl.S | 94 |
1 files changed, 0 insertions, 94 deletions
diff --git a/sysdeps/x86_64/fpu/e_logl.S b/sysdeps/x86_64/fpu/e_logl.S deleted file mode 100644 index 0d3576f48b..0000000000 --- a/sysdeps/x86_64/fpu/e_logl.S +++ /dev/null @@ -1,94 +0,0 @@ -/* - * Written by J.T. Conklin <jtc@netbsd.org>. - * Public domain. - * - * Adapted for `long double' by Ulrich Drepper <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_logl) - fldln2 // log(2) - fldt 8(%rsp) // x : log(2) - fxam - fnstsw - fld %st // x : x : log(2) - testb $1, %ah - jnz 3f // in case x is NaN or +-Inf - movzwl 8+8(%rsp), %eax - cmpl $0xc000, %eax - jae 6f // x <= -2, avoid overflow from -LDBL_MAX - 1. -4: fsubl MO(one) // x-1 : x : log(2) -6: fld %st // x-1 : x-1 : x : log(2) - fabs // |x-1| : x-1 : x : log(2) - fcompl MO(limit) // x-1 : x : log(2) - fnstsw // x-1 : x : log(2) - andb $0x45, %ah - jz 2f - fxam - fnstsw - andb $0x45, %ah - cmpb $0x40, %ah - jne 5f - fabs // log(1) is +0 in all rounding modes. -5: fstp %st(1) // x-1 : log(2) - fyl2xp1 // log(x) - ret - -2: fstp %st(0) // x : log(2) - fyl2x // log(x) - ret - -3: testb $4, %ah - jnz 4b // in case x is +-Inf - fstp %st(1) - fstp %st(1) - fadd %st(0) - ret -END (__ieee754_logl) - - -ENTRY(__logl_finite) - fldln2 // log(2) - fldt 8(%rsp) // x : log(2) - fld %st // x : x : log(2) - fsubl MO(one) // x-1 : x : log(2) - fld %st // x-1 : x-1 : x : log(2) - fabs // |x-1| : x-1 : x : log(2) - fcompl MO(limit) // x-1 : x : log(2) - fnstsw // x-1 : x : log(2) - andb $0x45, %ah - jz 2b - fxam - fnstsw - andb $0x45, %ah - cmpb $0x40, %ah - jne 7f - fabs // log(1) is +0 in all rounding modes. -7: fstp %st(1) // x-1 : log(2) - fyl2xp1 // log(x) - ret -END (__logl_finite) |