Mercurial > mxe-octave
view src/build-msvctools/math/ilogbf.S @ 3061:f8299bb6c872
Initial support for native MSVC compilation.
* add MSVC support files: compiler wrappers and support libraries
* adapt libiconv to work with MSVC
* adapt gettext to work with MSVC
author | Michael Goffioul <michael.goffioul@gmail.com> |
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date | Mon, 17 Jun 2013 22:43:11 -0400 |
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/* * Written by J.T. Conklin <jtc@netbsd.org>. * Public domain. */ .file "ilogbf.S" .text .align 4 .globl _ilogbf .def _ilogbf; .scl 2; .type 32; .endef _ilogbf: flds 4(%esp) /* I added the following ugly construct because ilogb(+-Inf) is required to return INT_MAX in ISO C99. -- jakub@redhat.com. */ fxam /* Is NaN or +-Inf? */ fstsw %ax movb $0x45, %dh andb %ah, %dh cmpb $0x05, %dh je 1f /* Is +-Inf, jump. */ fxtract pushl %eax fstp %st fistpl (%esp) fwait popl %eax ret 1: fstp %st movl $0x7fffffff, %eax ret