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use cc provided xlog2 instead of system log2.

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(on plan 9 cc calls it log2, but that conflicts here.)
the difference is that xlog2 returns -1 on non powers of 2.
8c was rewriting /10 into /8.

R=ken
OCL=29968
CL=29968
This commit is contained in:
Russ Cox 2009-06-05 23:12:07 -07:00
parent 01fe6a9c58
commit 8720b4721f
1 changed files with 2 additions and 2 deletions
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4
src/cmd/8c/cgen.c
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@ -346,7 +346,7 @@ cgen(Node *n, Node *nn)
c = r->vconst;
if(c < 0)
c = -c;
v = log2(c);
v = xlog2(c);
if(v < 0)
break;
/* fall thru */
@ -609,7 +609,7 @@ cgen(Node *n, Node *nn)
c = r->vconst;
if(c < 0)
c = -c;
v = log2(c);
v = xlog2(c);
if(v < 0)
break;
/* fall thru */