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use __rt_ffs instead of ffs

This commit is contained in:
weety 2013-05-25 18:57:01 +08:00
parent a33e992724
commit 624d947e56
2 changed files with 1 additions and 32 deletions
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31
components/drivers/include/drivers/mmcsd_core.h
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@ -210,37 +210,6 @@ rt_inline rt_uint32_t fls(rt_uint32_t val)
return bit;
}
#if !defined(__GNUC__) || defined(__CC_ARM)
rt_inline rt_uint32_t ffs(rt_uint32_t x)
{
int r = 1;
if (!x)
return 0;
if (!(x & 0xffff)) {
x >>= 16;
r += 16;
}
if (!(x & 0xff)) {
x >>= 8;
r += 8;
}
if (!(x & 0xf)) {
x >>= 4;
r += 4;
}
if (!(x & 3)) {
x >>= 2;
r += 2;
}
if (!(x & 1)) {
x >>= 1;
r += 1;
}
return r;
}
#endif
void mmcsd_host_lock(struct rt_mmcsd_host *host);
void mmcsd_host_unlock(struct rt_mmcsd_host *host);
void mmcsd_req_complete(struct rt_mmcsd_host *host);

2
components/drivers/sdio/mmcsd_core.c
View File

@ -493,7 +493,7 @@ rt_uint32_t mmcsd_select_voltage(struct rt_mmcsd_host *host, rt_uint32_t ocr)
ocr &= host->valid_ocr;
bit = ffs(ocr);
bit = __rt_ffs(ocr);
if (bit)
{
bit -= 1;