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Fixed a sliding attack bitboard bug in 32-bit mode

This is what prevented USE_32BIT_ATTACKS from working
on some architectures (like PowerPC).

Merged from Glaurung current development snapshot.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
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commit 0e835bd33496ef7ee467de6fd34c544191e4bab0 1 parent 43276cb
@mcostalba authored
Showing with 8 additions and 1 deletion.
  1. +8 −1 src/bitboard.cpp
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9 src/bitboard.cpp
@@ -393,7 +393,7 @@ namespace {
void init_ray_bitboards() {
int d[8] = {1, -1, 16, -16, 17, -17, 15, -15};
- for(int i = 0; i < 128; i = i + 9 & ~8) {
+ for(int i = 0; i < 128; i = (i + 9) & ~8) {
for(int j = 0; j < 8; j++) {
RayBB[(i&7)|((i>>4)<<3)][j] = EmptyBoardBB;
for(int k = i + d[j]; (k & 0x88) == 0; k += d[j])
@@ -479,8 +479,15 @@ namespace {
for(i = 0; i < 64; i++) {
attackIndex[i] = index;
mask[i] = sliding_attacks(i, 0ULL, 4, deltas, 1, 6, 1, 6);
+
+#if defined(USE_32BIT_ATTACKS)
+ j = (1 << (32 - shift[i]));
+#else
j = (1 << (64 - shift[i]));
+#endif
+
for(k = 0; k < j; k++) {
+
#if defined(USE_32BIT_ATTACKS)
b = index_to_bitboard(k, mask[i]);
attacks[index +
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