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littlefs: Added checks for __CLZ instruction in IAR

pull/5538/head
Christopher Haster 2017-11-27 00:10:17 -06:00
parent 2cf4715cb6
commit b52575bc65
1 changed files with 2 additions and 2 deletions
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4
features/filesystem/littlefs/littlefs/lfs_util.h
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@ -39,7 +39,7 @@ static inline uint32_t lfs_min(uint32_t a, uint32_t b) {
static inline uint32_t lfs_ctz(uint32_t a) { static inline uint32_t lfs_ctz(uint32_t a) {
#if defined(__GNUC__) || defined(__CC_ARM) #if defined(__GNUC__) || defined(__CC_ARM)
return __builtin_ctz(a); return __builtin_ctz(a);
#elif defined(__ICCARM__) #elif defined(__ICCARM__) && defined(__CLZ)
return __CLZ(__RBIT(a)); return __CLZ(__RBIT(a));
#else #else
uint32_t r = 32; uint32_t r = 32;
@ -57,7 +57,7 @@ static inline uint32_t lfs_ctz(uint32_t a) {
static inline uint32_t lfs_npw2(uint32_t a) { static inline uint32_t lfs_npw2(uint32_t a) {
#if defined(__GNUC__) || defined(__CC_ARM) #if defined(__GNUC__) || defined(__CC_ARM)
return 32 - __builtin_clz(a-1); return 32 - __builtin_clz(a-1);
#elif defined(__ICCARM__) #elif defined(__ICCARM__) && defined(__CLZ)
return 32 - __CLZ(a-1); return 32 - __CLZ(a-1);
#else #else
uint32_t r = 0; uint32_t r = 0;