Commit ca962ee58bad8373a76cf6c303abd0e5625bb710
2012-10-11T10:46:45
Use a 64 bit unsigned integer on the diff target to generate the hex target.
diff --git a/cgminer.c b/cgminer.c
index 05729e0..8bc0e24 100644
--- a/cgminer.c
+++ b/cgminer.c
@@ -4533,18 +4533,13 @@ static void gen_hash(unsigned char *data, unsigned char *hash, int len)
static void set_work_target(struct work *work, int diff)
{
unsigned char rtarget[33], target[33];
- uint8_t *data8;
- int i, j;
-
- /* Scale to any diff by setting number of bits according to diff */
- hex2bin(rtarget, "00000000ffffffffffffffffffffffffffffffffffffffffffffffffffffffff", 32);
- data8 = (uint8_t *)(rtarget + 4);
- for (i = 1, j = 0; i < diff; i++, j++) {
- int byte = j / 8;
- int bit = j % 8;
+ uint64_t *data64, h64;
- data8[byte] &= ~(128 >> bit);
- }
+ hex2bin(rtarget, "00000000ffff0000000000000000000000000000000000000000000000000000", 32);
+ data64 = (uint64_t *)(rtarget + 4);
+ h64 = be64toh(*data64);
+ h64 /= (uint64_t)diff;
+ *data64 = htobe64(h64);
swab256(target, rtarget);
if (opt_debug) {
char *htarget = bin2hex(target, 32);