ref: 7e04bb948c151b9984b3e4eaa5708a64a8ffe60b
dir: /llt/utils.h/
#ifndef __UTILS_H_ #define __UTILS_H_ /* these functions byteswap any-size units --------------------- */ void bswap(byte_t *s, size_t n); void bswap_to(byte_t *dest, byte_t *src, size_t n); void bswap_buffer(byte_t *data, size_t sz, size_t npts); /* ------------------------------------------------------------- */ /* reverse the order of elements of any size, in place or out of place */ /* n is the number of elements */ void memreverse(char *a, size_t n, size_t elsz); void memreverse_to(char *dest, char *a, size_t n, size_t elsz); /* swap the contents of two buffers */ void memswap(char *a, char *b, size_t sz); /* allocating aligned blocks ----------------------------------- */ void *malloc_aligned(size_t size, size_t align_size); void free_aligned(void *ptr); void *realloc_aligned(void *ptr, size_t size, size_t align_size); /* ------------------------------------------------------------- */ int dbl_equals(double a, double b); int flt_equals(float a, float b); void dbl_tolerance(double tol); void flt_tolerance(float tol); int double_exponent(double d); double double_mantissa(double d); int float_exponent(float f); float float_mantissa(float f); void snprint_real(char *s, size_t cnt, double r, int width, // printf field width, or 0 int dec, // # decimal digits desired, recommend 16 // # of zeros in .00...0x before using scientific notation // recommend 3-4 or so int max_digs_rt, // # of digits left of decimal before scientific notation // recommend 10 int max_digs_lf); void snprint_cplx(char *s, size_t cnt, double re, double im, // args to pass on to snprint_real int width, int dec, int max_digs_rt, int max_digs_lf, // print spaces around sign in a+bi int spflag); extern double trunc(double x); STATIC_INLINE double fpart(double arg) { return arg - trunc(arg); } #define ipart(x) trunc(x) numerictype_t effective_numerictype(double r); double conv_to_double(void *data, numerictype_t tag); void conv_from_double(void *data, double d, numerictype_t tag); int64_t conv_to_int64(void *data, numerictype_t tag); uint64_t conv_to_uint64(void *data, numerictype_t tag); int32_t conv_to_int32(void *data, numerictype_t tag); uint32_t conv_to_uint32(void *data, numerictype_t tag); #ifdef BITS64 #define conv_to_long conv_to_int64 #define conv_to_ulong conv_to_uint64 #else #define conv_to_long conv_to_int32 #define conv_to_ulong conv_to_uint32 #endif int cmp_same_lt(void *a, void *b, numerictype_t tag); int cmp_same_eq(void *a, void *b, numerictype_t tag); int cmp_lt(void *a, numerictype_t atag, void *b, numerictype_t btag); int cmp_eq(void *a, numerictype_t atag, void *b, numerictype_t btag); #ifdef ARCH_X86_64 # define LEGACY_REGS "=Q" #else # define LEGACY_REGS "=q" #endif #if !defined(__INTEL_COMPILER) && (defined(ARCH_X86) || defined(ARCH_X86_64)) STATIC_INLINE u_int16_t ByteSwap16(u_int16_t x) { __asm("xchgb %b0,%h0" : LEGACY_REGS (x) : "0" (x)); return x; } #define bswap_16(x) ByteSwap16(x) STATIC_INLINE u_int32_t ByteSwap32(u_int32_t x) { #if __CPU__ > 386 __asm("bswap %0": "=r" (x) : #else __asm("xchgb %b0,%h0\n"\ " rorl $16,%0\n" " xchgb %b0,%h0": LEGACY_REGS (x) : #endif "0" (x)); return x; } #define bswap_32(x) ByteSwap32(x) STATIC_INLINE u_int64_t ByteSwap64(u_int64_t x) { #ifdef ARCH_X86_64 __asm("bswap %0": "=r" (x) : "0" (x)); return x; #else register union { __extension__ u_int64_t __ll; u_int32_t __l[2]; } __x; asm("xchgl %0,%1": "=r"(__x.__l[0]),"=r"(__x.__l[1]): "0"(bswap_32((unsigned long)x)),"1"(bswap_32((unsigned long)(x>>32)))); return __x.__ll; #endif } #define bswap_64(x) ByteSwap64(x) #else #define bswap_16(x) (((x) & 0x00ff) << 8 | ((x) & 0xff00) >> 8) #ifdef __INTEL_COMPILER #define bswap_32(x) _bswap(x) #else #define bswap_32(x) \ ((((x) & 0xff000000) >> 24) | (((x) & 0x00ff0000) >> 8) | \ (((x) & 0x0000ff00) << 8) | (((x) & 0x000000ff) << 24)) #endif STATIC_INLINE u_int64_t ByteSwap64(u_int64_t x) { union { u_int64_t ll; u_int32_t l[2]; } w, r; w.ll = x; r.l[0] = bswap_32 (w.l[1]); r.l[1] = bswap_32 (w.l[0]); return r.ll; } #define bswap_64(x) ByteSwap64(x) #endif #endif