Swap bit pairs in pval_min

1 files changed, 4 insertions, 5 deletions

diff --git a/src/solvers/h48/gendata_h48.h b/src/solvers/h48/gendata_h48.h
index 890aad8..15b7589 100644
--- a/src/solvers/h48/gendata_h48.h
+++ b/src/solvers/h48/gendata_h48.h
@@ -507,8 +507,7 @@ get_h48_pval(const unsigned char *table, uint64_t i)
 STATIC_INLINE uint8_t
 get_h48_pvalmin(const unsigned char *table, uint64_t i)
 {
-        return (get_h48_pval(table, i) << UINT8_C(2)) +
-            get_h48_pval(table, i+UINT64_C(1));
+        return table[H48_INDEX(i)] >> UINT8_C(4);
 }
 
 STATIC_INLINE void
@@ -521,9 +520,9 @@ set_h48_pval(unsigned char *table, uint64_t i, uint8_t val)
 STATIC_INLINE void
 set_h48_pvalmin(unsigned char *table, uint64_t i, uint8_t val)
 {
-        uint8_t v;
+        uint8_t t, v;
 
         v = MIN(val, get_h48_pvalmin(table, i));
-        set_h48_pval(table, i, v >> UINT8_C(2));
-        set_h48_pval(table, i+UINT64_C(1), v % UINT8_C(4));
+        t = table[H48_INDEX(i)];
+        table[H48_INDEX(i)] = (t & UINT8_C(0xF)) | (v << UINT8_C(4));
 }