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Diffstat (limited to 'winsup/mingw/mingwex/math/log2.S')
| -rw-r--r-- | winsup/mingw/mingwex/math/log2.S | 51 |
1 files changed, 0 insertions, 51 deletions
diff --git a/winsup/mingw/mingwex/math/log2.S b/winsup/mingw/mingwex/math/log2.S deleted file mode 100644 index 08f008310..000000000 --- a/winsup/mingw/mingwex/math/log2.S +++ /dev/null @@ -1,51 +0,0 @@ -/* - * Written by J.T. Conklin <jtc@netbsd.org>. - * Adapted for use as log2 by Ulrich Drepper <drepper@cygnus.com>. - * Public domain. - * - * Changed to use fyl2xp1 for values near 1, <drepper@cygnus.com>. - * - * Removed header file dependency for use in libmingwex.a by - * Danny Smith <dannysmith@users.sourceforge.net> - */ - - .file "log2.S" - .text - .align 4 -one: .double 1.0 - /* 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. */ -limit: .double 0.29 - - .text - .align 4 -.globl _log2 - .def _log2; .scl 2; .type 32; .endef -_log2: - fldl one - fldl 4(%esp) // x : 1 - fxam - fnstsw - fld %st // x : x : 1 - sahf - jc 3f // in case x is NaN or ħInf -4: fsub %st(2), %st // x-1 : x : 1 - fld %st // x-1 : x-1 : x : 1 - fabs // |x-1| : x-1 : x : 1 - fcompl limit // x-1 : x : 1 - fnstsw // x-1 : x : 1 - andb $0x45, %ah - jz 2f - fstp %st(1) // x-1 : 1 - fyl2xp1 // log(x) - ret - -2: fstp %st(0) // x : 1 - fyl2x // log(x) - ret - -3: jp 4b // in case x is ħInf - fstp %st(1) - fstp %st(1) - ret |