148 lines
3.8 KiB
C
148 lines
3.8 KiB
C
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#ifndef __FENV_H
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#define __FENV_H 1
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typedef unsigned long fenv_t;
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typedef unsigned long fexcept_t;
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/* rounding mode used by fegetround() and fesetround() */
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#define FE_TONEAREST 0x00 /* round toward nearest (round) */
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#define FE_TOWARDZERO 0x10 /* round toward zero (trunc) */
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#define FE_DOWNWARD 0x20 /* round toward -inf (floor) */
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#define FE_UPWARD 0x30 /* round toward +inf (ceil) */
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/* rounding precision used by fegetprec() and fesetprec() */
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#define FE_LDBLPREC 0x00 /* long double precision */
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#define FE_FLTPREC 0x40 /* float precision */
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#define FE_DBLPREC 0x80 /* double precision */
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extern const char __Zero_l[];
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#define FE_DFL_ENV (*(const fenv_t *)(const void *)__Zero_l)
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/* begin function declarations */
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int feclearexcept(int);
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int fegetenv(fenv_t *);
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int fegetexceptflag(fexcept_t *, int);
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int fegetprec(void);
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int fegetround(void);
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int feholdexcept(fenv_t *);
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int feraiseexcept(int);
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int fesetenv(const fenv_t *);
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int fesetexceptflag(const fexcept_t *, int);
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int fesetprec(int);
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int fesetround(int);
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int fetestexcept(int);
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int feupdateenv(const fenv_t *);
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/* end function declarations */
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#ifndef __NOINLINE__
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/* faster inline functions */
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#if defined(__M68881) || defined(__M68882)
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/* direct FPU support */
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int fegetenv(__reg("a0")fenv_t *) =
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"\tinline\n"
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"\tfmove.l\tfpcr,(a0)\n"
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"\tmoveq\t#0,d0\n"
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"\teinline";
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int fegetround(void) =
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"\tinline\n"
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"\tfmove.l\tfpcr,d1\n"
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"\tmoveq\t#$30,d0\n"
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"\tand.l\td1,d0\n"
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"\teinline";
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int fegetprec(void) =
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"\tinline\n"
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"\tfmove.l\tfpcr,d0\n"
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"\tand.l\t#$c0,d0\n"
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"\teinline";
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int feholdexcept(__reg("a0")fenv_t *) =
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"\tinline\n"
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"\tfmove.l\tfpcr,(a0)\n"
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"\tmoveq\t#0,d0\n"
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"\teinline";
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int fesetenv(__reg("a0")const fenv_t *) =
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"\tinline\n"
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"\tfmove.l\t(a0),fpcr\n"
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"\tmoveq\t#0,d0\n"
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"\teinline";
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int fesetround(__reg("d0")int) =
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"\tinline\n"
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"\tfmove.l\tfpcr,d1\n"
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"\tand.w\t#$ffcf,d1\n"
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"\tor.l\td0,d1\n"
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"\tfmove.l\td1,fpcr\n"
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"\tmoveq\t#0,d0\n"
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"\teinline";
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int fesetprec(__reg("d0")int) =
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"\tinline\n"
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"\tfmove.l\tfpcr,d1\n"
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"\tand.w\t#$ff3f,d1\n"
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"\tor.l\td0,d1\n"
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"\tfmove.l\td1,fpcr\n"
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"\tmoveq\t#0,d0\n"
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"\teinline";
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#else
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/* IEEE or software floating-point */
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int fegetenv(__reg("a0")fenv_t *) =
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"\tinline\n"
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"\tmoveq\t#-1,d0\n"
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"\teinline";
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int fegetround(void) =
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"\tinline\n"
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"\tmoveq\t#-1,d0\n"
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"\teinline";
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int fegetprec(void) =
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"\tinline\n"
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"\tmoveq\t#-1,d0\n"
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"\teinline";
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int feholdexcept(__reg("a0")fenv_t *) =
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"\tinline\n"
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"\tmoveq\t#-1,d0\n"
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"\teinline";
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int fesetenv(__reg("a0")const fenv_t *) =
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"\tinline\n"
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"\tmoveq\t#-1,d0\n"
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"\teinline";
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int fesetround(__reg("d0")int) =
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"\tinline\n"
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"\tmoveq\t#-1,d0\n"
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"\teinline";
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int fesetprec(__reg("d0")int) =
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"\tinline\n"
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"\tmoveq\t#-1,d0\n"
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"\teinline";
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#endif
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int feclearexcept(__reg("d0")int) =
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"\tinline\n"
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"\tmoveq\t#0,d0\n"
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"\teinline";
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int fegetexceptflag(__reg("a0")fexcept_t *, __reg("d0")int) =
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"\tinline\n"
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"\tmoveq\t#-1,d0\n"
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"\teinline";
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int feraiseexcept(__reg("d0")int) =
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"\tinline\n"
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"\tmoveq\t#-1,d0\n"
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"\teinline";
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int fesetexceptflag(__reg("a0")const fexcept_t *, __reg("d0")int) =
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"\tinline\n"
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"\tmoveq\t#-1,d0\n"
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"\teinline";
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int fetestexcept(__reg("d0")int) =
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"\tinline\n"
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"\tmoveq\t#0,d0\n"
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"\teinline";
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int feupdateenv(__reg("a0")const fenv_t *) =
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"\tinline\n"
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"\tmoveq\t#-1,d0\n"
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"\teinline";
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#endif /* __NOINLINE__ */
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#endif /* __FENV_H */
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