4 #include "storage_number.h"
6 storage_number pack_storage_number(calculated_number value)
12 // bit 31 = 0:divide, 1:multiply
13 // bit 30, 29, 28 = (multiplier or divider) 0-7
14 // bit 27 to 25 = reserved for flags
15 // bit 24 to bit 1 = the value
17 storage_number sign = 0, exp = 0, mul;
19 calculated_number n = value;
26 while(m < 7 && n > (calculated_number)0x00ffffff) {
30 while(m > -7 && n < (calculated_number)0x00199999) {
41 if(n > (calculated_number)0x00ffffff) {
42 error("Number " CALCULATED_NUMBER_FORMAT " is too big.", value);
43 n = (calculated_number)0x00ffffff;
48 // without this there are rounding problems
49 // example: 0.9 becomes 0.89
52 r = (sign << 31) + (exp << 30) + (mul << 27) + n;
53 // fprintf(stderr, "PACK: %08X, sign = %d, exp = %d, mul = %d, n = " CALCULATED_NUMBER_FORMAT "\n", r, sign, exp, mul, n);
58 calculated_number unpack_storage_number(storage_number value)
65 if(value & (1 << 31)) {
70 if(value & (1 << 30)) {
75 int mul = value >> 27;
78 calculated_number n = value;
80 // fprintf(stderr, "UNPACK: %08X, sign = %d, exp = %d, mul = %d, n = " CALCULATED_NUMBER_FORMAT "\n", value, sign, exp, mul, n);