Mercurial > mxe-octave
view src/build-msvctools/math/modff.c @ 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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#include <fenv.h> #include <math.h> #include <errno.h> #define FE_ROUNDING_MASK \ (FE_TONEAREST | FE_DOWNWARD | FE_UPWARD | FE_TOWARDZERO) float modff (float value, float* iptr) { float int_part; unsigned short saved_cw; unsigned short tmp_cw; /* truncate */ asm ("fnstcw %0;" : "=m" (saved_cw)); /* save control word */ tmp_cw = (saved_cw & ~FE_ROUNDING_MASK) | FE_TOWARDZERO; asm ("fldcw %0;" : : "m" (tmp_cw)); asm ("frndint;" : "=t" (int_part) : "0" (value)); /* round */ asm ("fldcw %0;" : : "m" (saved_cw)); /* restore saved cw */ if (iptr) *iptr = int_part; return (isinf (value) ? 0.0F : value - int_part); }