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Add C version of find_msb()

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This patch allows people to build the spice-client on any 32bit/64bit
architecture.

by Bryan Stillwell <bryan@bokeoa.com>
This commit is contained in:
Gerd Hoffmann 2010-05-03 11:32:35 +02:00
parent ae40f270cf
commit a5cf90922e
1 changed files with 20 additions and 1 deletions
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21
common/gl_utils.h
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@ -60,7 +60,7 @@ found:
return r + 1;
}
#else
#elif defined(__GNUC__) && (defined(__i386__) || defined(__x86_64__))
static inline int find_msb(unsigned int val)
{
int ret;
@ -73,6 +73,25 @@ static inline int find_msb(unsigned int val)
return ret + 1;
}
#else
static inline int find_msb(unsigned int val)
{
signed char index = 31;
if(val == 0) {
return 0;
}
do {
if(val & 0x80000000) {
break;
}
val <<= 1;
} while(--index >= 0);
return index+1;
}
#endif
static inline int gl_get_to_power_two(unsigned int val)