49 lines
822 B
C
49 lines
822 B
C
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/*
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(c) copyright 1988 by the Vrije Universiteit, Amsterdam, The Netherlands.
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See the copyright notice in the ACK home directory, in the file "Copyright".
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*/
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/* $Header$ */
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#include "misc.h"
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#include <em_arith.h>
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flt_arith2flt(n, e)
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register arith n;
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register flt_arith *e;
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{
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/* Convert the arith "n" to a flt_arith "e".
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*/
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register int i;
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if (n == 0) {
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e->flt_exp = 0;
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e->flt_sign = 0;
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e->m1 = e->m2 = 0;
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return;
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}
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if (n < 0) {
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e->flt_sign = 1;
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n = -n;
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}
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else e->flt_sign = 0;
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e->flt_exp = 63;
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e->m1 = e->m2 = 0;
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if (n < 0) {
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n = 0x40000000;
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while ((n << 1) > 0) n <<= 1;
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e->flt_exp++;
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}
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for (i = 64; i > 0 && n != 0; i--) {
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b64_rsft(&(e->flt_mantissa));
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e->m1 |= (n & 1) << 31;
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n >>= 1;
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}
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if (i > 0) {
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b64_sft(&(e->flt_mantissa), i);
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}
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flt_status = 0;
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flt_nrm(e);
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}
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