[PATCH 1/2] bitset: discontinue the use of GCC builtin

[Mattias Rönnblom]

Replace the use of __builtin_ffsll() with rte_bsf64() to be MSVC
compatible.

Signed-off-by: Mattias Rönnblom <mattias.ronnb...@ericsson.com>
Suggested-by: David Marchand <david.march...@redhat.com>
---
 lib/eal/include/rte_bitset.h | 9 +++------
 1 file changed, 3 insertions(+), 6 deletions(-)

diff --git a/lib/eal/include/rte_bitset.h b/lib/eal/include/rte_bitset.h
index 74c643a72a..27b7a2e34d 100644
--- a/lib/eal/include/rte_bitset.h
+++ b/lib/eal/include/rte_bitset.h
@@ -601,7 +601,6 @@ __rte_bitset_find_nowrap(const uint64_t *bitset, size_t 
__rte_unused size, size_
 
        while (word_idx <= __RTE_BITSET_WORD_IDX(end_bit - 1)) {
                uint64_t word;
-               int word_ffs;
 
                word = bitset[word_idx];
                if (find_clear)
@@ -609,16 +608,14 @@ __rte_bitset_find_nowrap(const uint64_t *bitset, size_t 
__rte_unused size, size_
 
                word >>= offset;
 
-               word_ffs = __builtin_ffsll(word);
-
-               if (word_ffs != 0) {
-                       ssize_t ffs = start_bit + word_ffs - 1;
+               if (word != 0) {
+                       size_t ffs = start_bit + rte_bsf64(word);
 
                        /*
                         * Check if set bit were among the last,
                         * unused bits, in the last word.
                         */
-                       if (unlikely(ffs >= (ssize_t)end_bit))
+                       if (unlikely(ffs >= end_bit))
                                return -1;
 
                        return ffs;
-- 
2.43.0