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cleaned up a bit, and made add_ext and sub_ext proper entry points,

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without preconditions on the arguments
This commit is contained in:
ceriel
1988-08-04 11:16:20 +00:00
parent 3d3b891371
commit 2d12b422e5
8 changed files with 122 additions and 125 deletions
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24
mach/proto/fp/adf8.c
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@@ -16,7 +16,6 @@ adf8(s2,s1)
_double s1,s2;
{
EXTEND e1,e2;
int swap;
if (s1.__double[0] == 0 && s1.__double[1] == 0) {
s1 = s2;
@@ -28,28 +27,7 @@ _double s1,s2;
extend(&s1,&e1,sizeof(_double));
extend(&s2,&e2,sizeof(_double));
/* adjust mantissas to equal powers */
if (e1.sign ^ e2.sign) { /* signs are different */
/* determine which is largest number */
swap = (e2.exp > e1.exp) ? 1 : (e2.exp < e1.exp) ? 0 :
(e2.m1 > e1.m1 ) ? 1 : (e2.m1 < e1.m1 ) ? 0 :
(e2.m2 > e1.m2 ) ? 1 : 0;
/* adjust mantissas to equal powers */
sft_ext(&e1,&e2);
/* subtract the extended formats */
if (swap) { /* &e2 is the largest number */
sub_ext(&e2,&e1);
e1 = e2;
}
else {
sub_ext(&e1,&e2);
}
}
else {
/* adjust mantissas to equal powers */
sft_ext(&e1,&e2);
add_ext(&e1,&e2);
}
add_ext(&e1,&e2);
compact(&e1,&s1,sizeof(_double));
return(s1);
}