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better version of op=

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fixed bugs in /= and %/

SVN=122493
This commit is contained in:
Ken Thompson 2008-06-12 14:21:09 -07:00
parent dbf1da6b37
commit ef61a4cb1e
2 changed files with 25 additions and 25 deletions
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48
src/cmd/6g/gen.c
View File

@ -275,7 +275,7 @@ loop:
break;
case OASOP:
cgen_asop(n->left, n->right, n->etype);
cgen_asop(n);
break;
case OAS:
@ -683,40 +683,40 @@ cgen_ret(Node *n)
}
void
cgen_asop(Node *nl, Node *nr, int op)
cgen_asop(Node *n)
{
Node n1, n2;
int a;
Node n1, n2, n3, n4;
Node *nl, *nr;
nl = n->left;
nr = n->right;
if(nr->ullman >= UINF && nl->ullman >= UINF) {
fatal("cgen_asop both sides call");
}
// BOTCH make special case for DIVQ
a = optoas(op, nl->type);
if(nl->addable) {
regalloc(&n2, nr->type, N);
cgen(nr, &n2);
regalloc(&n1, nl->type, N);
cgen(nl, &n1);
gins(a, &n2, &n1);
gmove(&n1, nl);
regfree(&n1);
regfree(&n2);
return;
}
if(nr->ullman > nl->ullman) {
fatal("gcgen_asopen");
regalloc(&n2, nl->type, N);
cgen(nr, &n2);
igen(nl, &n1, N);
} else {
igen(nl, &n1, N);
regalloc(&n2, nl->type, N);
cgen(nr, &n2);
}
regalloc(&n1, nl->type, N);
igen(nl, &n2, N);
cgen(nr, &n1);
gins(a, &n1, &n2);
n3 = *n;
n3.left = &n1;
n3.right = &n2;
n3.op = n->etype;
regalloc(&n4, nr->type, N);
cgen(&n3, &n4);
gmove(&n4, &n1);
regfree(&n1);
regfree(&n2);
regfree(&n4);
}
void

2
src/cmd/6g/gg.h
View File

@ -109,7 +109,7 @@ Node* lookdot(Node*, Node*, int);
void inarggen(void);
void agen_inter(Node*, Node*);
void cgen_as(Node*, Node*, int);
void cgen_asop(Node*, Node*, int);
void cgen_asop(Node*);
void cgen_ret(Node*);
void cgen_call(Node*);
void cgen_callmeth(Node*);