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use new con_float

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This commit is contained in:
ceriel 1990-06-29 11:05:19 +00:00
parent cabefb9d9e
commit 5512f14697
1 changed files with 6 additions and 72 deletions
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78
mach/pdp/ncg/mach.c
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@ -46,78 +46,12 @@ con_mult(sz) word sz; {
#endif
}
/*
* The next function is difficult to do when not running on a PDP 11 or VAX
* The strategy followed is to assume the code generator is running on a PDP 11
* unless the ACK_ASS define is on.
*/
con_float() {
#ifdef ACK_ASS
double f;
double atof(), frexp();
int i, j;
int sign = 0;
int fraction ;
if (argval != 4 && argval != 8)
fatal("bad fcon size");
f = atof(str);
if (f == 0) {
if (argval == 8) fprintf(codefile, ".data2 0, 0\n");
fprintf(codefile, ".data2 0, 0\n");
return;
}
f = frexp(f, &i);
if (f < 0) {
f = -f;
sign = 1;
}
while (f < 0.5) {
f += f;
i --;
}
f = 2*f - 1.0; /* hidden bit */
i = (i + 128) & 0377;
fraction = (sign << 15) | (i << 7);
for (j = 6; j>= 0; j--) {
f *= 2;
if (f >= 1.0) {
fraction |= (1 << j);
f -= 1.0;
}
}
fprintf(codefile, ".data2 0%o", fraction);
for (i = argval / 2 - 1; i; i--) {
fraction = 0;
for (j = 15; j>= 0; j--) {
f *= 2;
if (f >= 1.0) {
fraction |= (1 << j);
f -= 1.0;
}
}
fprintf(codefile, ", 0%o", fraction);
}
putc('\n', codefile);
#else
double f;
double atof();
int i;
short *p;
if (argval != 4 && argval != 8)
fatal("bad fcon size");
f = atof(str);
p = (short *) &f;
i = *p++;
if (argval == 8) {
fprintf(codefile,"\t%o;%o;",i,*p++);
i = *p++;
}
fprintf(codefile,"\t%o;%o\n",i,*p++);
#endif
}
#define PDPFLOAT
#define FL_MSL_AT_LOW_ADDRESS 1
#define FL_MSW_AT_LOW_ADDRESS 1
#define FL_MSB_AT_LOW_ADDRESS 0
#define CODE_GENERATOR
#include <con_float>
#ifdef REGVARS