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// random number generator from supercollider
// coded by matt barber
#include <stdint.h>
#include <time.h>
typedef struct _cyrandom_state{
uint32_t s1;
uint32_t s2;
uint32_t s3;
}t_cyrandom_state;
int cyrandom_get_id(void);
void cyrandom_init(t_cyrandom_state* rstate, int seed);
int cyget_seed(t_symbol *s, int ac, t_atom *av, int n);
uint32_t cyrandom_trand(uint32_t* s1, uint32_t* s2, uint32_t* s3);
float cyrandom_frand(uint32_t* s1, uint32_t* s2, uint32_t* s3);
// These are for [pink~]
#if defined(__GNUC__)
// use gcc's builtins
static __inline__ int32_t CLZ(int32_t arg){
if(arg)
return(__builtin_clz(arg));
else
return(32);
}
#elif defined(_MSC_VER)
#include <intrin.h>
#pragma intrinsic(_BitScanReverse)
__forceinline static int32_t CLZ(int32_t arg){
unsigned long idx;
if(_BitScanReverse(&idx, (unsigned long)arg))
return((int32_t)(31-idx));
return(32);
}
#elif defined(__ppc__) || defined(__powerpc__) || defined(__PPC__)
static __inline__ int32_t CLZ(int32_t arg){
__asm__ volatile("cntlzw %0, %1" : "=r" (arg) : "r" (arg));
return(arg);
}
#elif defined(__i386__) || defined(__x86_64__)
static __inline__ int32_t CLZ(int32_t arg){
if(arg)
__asm__ volatile("bsrl %0, %0\nxorl $31, %0\n" : "=r" (arg) : "0" (arg));
else
arg = 32;
return(arg);
}
#else
static __inline__ int32_t CLZ(int32_t arg){
if(!arg)
return(32);
int32_t n = 0;
if(!(arg & 0xFFFF0000)){
n += 16;
arg <<= 16;
}
if(!(arg & 0xFF000000)){
n += 8;
arg <<= 8;
}
if(!(arg & 0xF0000000)){
n += 4;
arg <<= 4;
}
if(!(arg & 0xC0000000)){
n += 2;
arg <<= 2;
}
if(!(arg & 0x80000000))
n++;
return(n);
}
#endif
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