42 lines
944 B
C
42 lines
944 B
C
/* Floating-point constants for the 68881.
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Copyright (C) 1992 Free Software Foundation, Inc. */
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/* IGNORE($ This is used internally in the library. */
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#include <sysdeps/ieee754/fl.h>
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/* ansidecl.m4 here inserts the ieee file. Kludge o rama.
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$) ENDCOMMENT INCLUDE($sysdeps/ieee754/fl.h$) STARTCOMMENT */
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#ifndef __need_HUGE_VAL
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#ifdef __GNUC__
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#undef FLT_ROUNDS
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/* Interrogate the 68881 to find the current rounding mode. */
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static __const __inline int
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DEFUN_VOID(__flt_rounds)
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{
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unsigned long int __fpcr;
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__asm("fmove%.l fpcr, %0" : "=g" (__fpcr));
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switch (__fpcr & (1 | 2))
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{
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case 0:
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return _FLT_ROUNDS_TONEAREST;
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case 1:
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return _FLT_ROUNDS_TOZERO;
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case 2:
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return _FLT_ROUNDS_TONEGINF;
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case 3:
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return _FLT_ROUNDS_TOPOSINF;
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default:
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return _FLT_ROUNDS_INDETERMINATE;
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}
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}
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#define FLT_ROUNDS (__flt_rounds())
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#endif /* GCC. */
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#endif /* Don't need HUGE_VAL. */
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