diff options
Diffstat (limited to 'qemu/include/qemu/bswap.h')
| -rw-r--r-- | qemu/include/qemu/bswap.h | 30 |
1 files changed, 21 insertions, 9 deletions
diff --git a/qemu/include/qemu/bswap.h b/qemu/include/qemu/bswap.h index 07d88de74..ce3c42e4d 100644 --- a/qemu/include/qemu/bswap.h +++ b/qemu/include/qemu/bswap.h @@ -1,15 +1,10 @@ #ifndef BSWAP_H #define BSWAP_H -#include "config-host.h" -#include <inttypes.h> -#include <limits.h> -#include <string.h> #include "fpu/softfloat.h" #ifdef CONFIG_MACHINE_BSWAP_H # include <sys/endian.h> -# include <sys/types.h> # include <machine/bswap.h> #elif defined(__FreeBSD__) # include <sys/endian.h> @@ -130,6 +125,25 @@ static inline uint32_t qemu_bswap_len(uint32_t value, int len) return bswap32(value) >> (32 - 8 * len); } +/* + * Same as cpu_to_le{16,23}, except that gcc will figure the result is + * a compile-time constant if you pass in a constant. So this can be + * used to initialize static variables. + */ +#if defined(HOST_WORDS_BIGENDIAN) +# define const_le32(_x) \ + ((((_x) & 0x000000ffU) << 24) | \ + (((_x) & 0x0000ff00U) << 8) | \ + (((_x) & 0x00ff0000U) >> 8) | \ + (((_x) & 0xff000000U) >> 24)) +# define const_le16(_x) \ + ((((_x) & 0x00ff) << 8) | \ + (((_x) & 0xff00) >> 8)) +#else +# define const_le32(_x) (_x) +# define const_le16(_x) (_x) +#endif + /* Unions for reinterpreting between floats and integers. */ typedef union { @@ -424,11 +438,9 @@ static inline void stfq_be_p(void *ptr, float64 v) static inline unsigned long leul_to_cpu(unsigned long v) { - /* In order to break an include loop between here and - qemu-common.h, don't rely on HOST_LONG_BITS. */ -#if ULONG_MAX == UINT32_MAX +#if HOST_LONG_BITS == 32 return le_bswap(v, 32); -#elif ULONG_MAX == UINT64_MAX +#elif HOST_LONG_BITS == 64 return le_bswap(v, 64); #else # error Unknown sizeof long |