mirror of
https://github.com/autc04/Retro68.git
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112 lines
1.8 KiB
C
112 lines
1.8 KiB
C
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#include <ieeefp.h>
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fp_rnd
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fpgetround (void)
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{
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char *out;
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ieee_flags("get", "direction","", &out);
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if (strcmp(out,"nearest") == 0) return FP_RN;
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if (strcmp(out,"negative") == 0) return FP_RM;
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if (strcmp(out,"positive") == 0) return FP_RP;
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if (strcmp(out,"tozero") == 0) return FP_RZ;
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abort();
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}
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fp_rnd
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fpsetround (fp_rnd new)
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{
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fp_rnd old = fpgetround();
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char *dummy;
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switch (new)
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{
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case FP_RN:
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ieee_flags("set", "direction", "nearest", &dummy);
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break;
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case FP_RM:
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ieee_flags("set", "direction", "negative", &dummy);
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break;
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case FP_RP:
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ieee_flags("set", "direction", "positive", &dummy);
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break;
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case FP_RZ:
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ieee_flags("set", "direction", "tozero", &dummy);
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break;
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default:
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break;
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}
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return old;
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}
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fp_except
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fpgetmask (void)
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{
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char *out;
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int r = 0;
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int i = ieee_flags("get","exception","",&out);
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if (i & 1) r |= FP_X_IMP;
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if (i & 2) r |= FP_X_DX;
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if (i & 4) r |= FP_X_UFL;
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if (i & 8) r |= FP_X_OFL;
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if (i & 16) r |= FP_X_INV;
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return r;
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}
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fp_except
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fpsetmask (fp_except mask)
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{
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fp_except old = fpgetmask();
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char *out;
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ieee_flags("clear","exception", "all", &out);
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if (mask & FP_X_IMP)
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ieee_flags("set","exception","inexact", &out);
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if (mask & FP_X_DX)
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ieee_flags("set","exception","division", &out);
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if (mask & FP_X_UFL)
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ieee_flags("set","exception","underflow", &out);
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if (mask & FP_X_OFL)
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ieee_flags("set","exception","overflow", &out);
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if (mask & FP_X_INV)
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ieee_flags("set","exception","invalid", &out);
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return old;
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}
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fp_except
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fpsetsticky (fp_except mask)
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{
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return fpsetmask(mask);
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}
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fp_except
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fpgetsticky (void)
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{
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return fpgetmask();
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}
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int
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fpsetroundtoi (fp_rdi rdi_mode)
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{
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return 0;
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}
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int
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fpgetroundtoi (void)
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{
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return 0;
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}
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