#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>
-#else
-
-#ifdef CONFIG_BYTESWAP_H
-#include <byteswap.h>
-#else
-
-#define bswap_16(x) \
-({ \
- uint16_t __x = (x); \
- ((uint16_t)( \
- (((uint16_t)(__x) & (uint16_t)0x00ffU) << 8) | \
- (((uint16_t)(__x) & (uint16_t)0xff00U) >> 8) )); \
-})
-
-#define bswap_32(x) \
-({ \
- uint32_t __x = (x); \
- ((uint32_t)( \
- (((uint32_t)(__x) & (uint32_t)0x000000ffUL) << 24) | \
- (((uint32_t)(__x) & (uint32_t)0x0000ff00UL) << 8) | \
- (((uint32_t)(__x) & (uint32_t)0x00ff0000UL) >> 8) | \
- (((uint32_t)(__x) & (uint32_t)0xff000000UL) >> 24) )); \
-})
-
-#define bswap_64(x) \
-({ \
- uint64_t __x = (x); \
- ((uint64_t)( \
- (uint64_t)(((uint64_t)(__x) & (uint64_t)0x00000000000000ffULL) << 56) | \
- (uint64_t)(((uint64_t)(__x) & (uint64_t)0x000000000000ff00ULL) << 40) | \
- (uint64_t)(((uint64_t)(__x) & (uint64_t)0x0000000000ff0000ULL) << 24) | \
- (uint64_t)(((uint64_t)(__x) & (uint64_t)0x00000000ff000000ULL) << 8) | \
- (uint64_t)(((uint64_t)(__x) & (uint64_t)0x000000ff00000000ULL) >> 8) | \
- (uint64_t)(((uint64_t)(__x) & (uint64_t)0x0000ff0000000000ULL) >> 24) | \
- (uint64_t)(((uint64_t)(__x) & (uint64_t)0x00ff000000000000ULL) >> 40) | \
- (uint64_t)(((uint64_t)(__x) & (uint64_t)0xff00000000000000ULL) >> 56) )); \
-})
-
-#endif /* !CONFIG_BYTESWAP_H */
+# include <sys/endian.h>
+# include <sys/types.h>
+# include <machine/bswap.h>
+#elif defined(CONFIG_BYTESWAP_H)
+# include <byteswap.h>
static inline uint16_t bswap16(uint16_t x)
{
{
return bswap_64(x);
}
+# else
+static inline uint16_t bswap16(uint16_t x)
+{
+ return (((x & 0x00ff) << 8) |
+ ((x & 0xff00) >> 8));
+}
+
+static inline uint32_t bswap32(uint32_t x)
+{
+ return (((x & 0x000000ffU) << 24) |
+ ((x & 0x0000ff00U) << 8) |
+ ((x & 0x00ff0000U) >> 8) |
+ ((x & 0xff000000U) >> 24));
+}
+static inline uint64_t bswap64(uint64_t x)
+{
+ return (((x & 0x00000000000000ffULL) << 56) |
+ ((x & 0x000000000000ff00ULL) << 40) |
+ ((x & 0x0000000000ff0000ULL) << 24) |
+ ((x & 0x00000000ff000000ULL) << 8) |
+ ((x & 0x000000ff00000000ULL) >> 8) |
+ ((x & 0x0000ff0000000000ULL) >> 24) |
+ ((x & 0x00ff000000000000ULL) >> 40) |
+ ((x & 0xff00000000000000ULL) >> 56));
+}
#endif /* ! CONFIG_MACHINE_BSWAP_H */
static inline void bswap16s(uint16_t *s)
#if defined(HOST_WORDS_BIGENDIAN)
#define be_bswap(v, size) (v)
-#define le_bswap(v, size) bswap ## size(v)
+#define le_bswap(v, size) glue(bswap, size)(v)
#define be_bswaps(v, size)
-#define le_bswaps(p, size) *p = bswap ## size(*p);
+#define le_bswaps(p, size) do { *p = glue(bswap, size)(*p); } while(0)
#else
#define le_bswap(v, size) (v)
-#define be_bswap(v, size) bswap ## size(v)
+#define be_bswap(v, size) glue(bswap, size)(v)
#define le_bswaps(v, size)
-#define be_bswaps(p, size) *p = bswap ## size(*p);
+#define be_bswaps(p, size) do { *p = glue(bswap, size)(*p); } while(0)
#endif
#define CPU_CONVERT(endian, size, type)\
static inline type endian ## size ## _to_cpu(type v)\
{\
- return endian ## _bswap(v, size);\
+ return glue(endian, _bswap)(v, size);\
}\
\
static inline type cpu_to_ ## endian ## size(type v)\
{\
- return endian ## _bswap(v, size);\
+ return glue(endian, _bswap)(v, size);\
}\
\
static inline void endian ## size ## _to_cpus(type *p)\
{\
- endian ## _bswaps(p, size)\
+ glue(endian, _bswaps)(p, size);\
}\
\
static inline void cpu_to_ ## endian ## size ## s(type *p)\
{\
- endian ## _bswaps(p, size)\
+ glue(endian, _bswaps)(p, size);\
}\
\
static inline type endian ## size ## _to_cpup(const type *p)\
{\
- return endian ## size ## _to_cpu(*p);\
+ return glue(glue(endian, size), _to_cpu)(*p);\
}\
\
static inline void cpu_to_ ## endian ## size ## w(type *p, type v)\
{\
- *p = cpu_to_ ## endian ## size(v);\
+ *p = glue(glue(cpu_to_, endian), size)(v);\
}
CPU_CONVERT(be, 16, uint16_t)
CPU_CONVERT(le, 32, uint32_t)
CPU_CONVERT(le, 64, uint64_t)
-/* unaligned versions (optimized for frequent unaligned accesses)*/
-
-#if defined(__i386__) || defined(_ARCH_PPC)
-
-#define cpu_to_le16wu(p, v) cpu_to_le16w(p, v)
-#define cpu_to_le32wu(p, v) cpu_to_le32w(p, v)
-#define le16_to_cpupu(p) le16_to_cpup(p)
-#define le32_to_cpupu(p) le32_to_cpup(p)
-#define be32_to_cpupu(p) be32_to_cpup(p)
-
-#define cpu_to_be16wu(p, v) cpu_to_be16w(p, v)
-#define cpu_to_be32wu(p, v) cpu_to_be32w(p, v)
-#define cpu_to_be64wu(p, v) cpu_to_be64w(p, v)
-
-#else
-
-static inline void cpu_to_le16wu(uint16_t *p, uint16_t v)
-{
- uint8_t *p1 = (uint8_t *)p;
-
- p1[0] = v & 0xff;
- p1[1] = v >> 8;
-}
-
-static inline void cpu_to_le32wu(uint32_t *p, uint32_t v)
-{
- uint8_t *p1 = (uint8_t *)p;
-
- p1[0] = v & 0xff;
- p1[1] = v >> 8;
- p1[2] = v >> 16;
- p1[3] = v >> 24;
-}
-
-static inline uint16_t le16_to_cpupu(const uint16_t *p)
-{
- const uint8_t *p1 = (const uint8_t *)p;
- return p1[0] | (p1[1] << 8);
-}
-
-static inline uint32_t le32_to_cpupu(const uint32_t *p)
-{
- const uint8_t *p1 = (const uint8_t *)p;
- return p1[0] | (p1[1] << 8) | (p1[2] << 16) | (p1[3] << 24);
-}
-
-static inline uint32_t be32_to_cpupu(const uint32_t *p)
-{
- const uint8_t *p1 = (const uint8_t *)p;
- return p1[3] | (p1[2] << 8) | (p1[1] << 16) | (p1[0] << 24);
-}
-
-static inline void cpu_to_be16wu(uint16_t *p, uint16_t v)
-{
- uint8_t *p1 = (uint8_t *)p;
-
- p1[0] = v >> 8;
- p1[1] = v & 0xff;
-}
-
-static inline void cpu_to_be32wu(uint32_t *p, uint32_t v)
-{
- uint8_t *p1 = (uint8_t *)p;
-
- p1[0] = v >> 24;
- p1[1] = v >> 16;
- p1[2] = v >> 8;
- p1[3] = v & 0xff;
-}
-
-static inline void cpu_to_be64wu(uint64_t *p, uint64_t v)
-{
- uint8_t *p1 = (uint8_t *)p;
-
- p1[0] = v >> 56;
- p1[1] = v >> 48;
- p1[2] = v >> 40;
- p1[3] = v >> 32;
- p1[4] = v >> 24;
- p1[5] = v >> 16;
- p1[6] = v >> 8;
- p1[7] = v & 0xff;
-}
-
-#endif
-
-#ifdef HOST_WORDS_BIGENDIAN
-#define cpu_to_32wu cpu_to_be32wu
-#define leul_to_cpu(v) glue(glue(le,HOST_LONG_BITS),_to_cpu)(v)
-#else
-#define cpu_to_32wu cpu_to_le32wu
-#define leul_to_cpu(v) (v)
-#endif
-
-#undef le_bswap
-#undef be_bswap
-#undef le_bswaps
-#undef be_bswaps
-
/* len must be one of 1, 2, 4 */
static inline uint32_t qemu_bswap_len(uint32_t value, int len)
{
return bswap32(value) >> (32 - 8 * len);
}
+/* Unions for reinterpreting between floats and integers. */
+
typedef union {
float32 f;
uint32_t l;
* q: 64 bits
*
* endian is:
- * (empty): 8 bit access
+ * (empty): host endian
* be : big endian
* le : little endian
*/
+
static inline int ldub_p(const void *ptr)
{
return *(uint8_t *)ptr;
*(uint8_t *)ptr = v;
}
-/* NOTE: on arm, putting 2 in /proc/sys/debug/alignment so that the
- kernel handles unaligned load/stores may give better results, but
- it is a system wide setting : bad */
-#if defined(HOST_WORDS_BIGENDIAN) || defined(WORDS_ALIGNED)
+/* Any compiler worth its salt will turn these memcpy into native unaligned
+ operations. Thus we don't need to play games with packed attributes, or
+ inline byte-by-byte stores. */
-/* conservative code for little endian unaligned accesses */
-static inline int lduw_le_p(const void *ptr)
+static inline int lduw_p(const void *ptr)
{
-#ifdef _ARCH_PPC
- int val;
- __asm__ __volatile__ ("lhbrx %0,0,%1" : "=r" (val) : "r" (ptr));
- return val;
-#else
- const uint8_t *p = ptr;
- return p[0] | (p[1] << 8);
-#endif
+ uint16_t r;
+ memcpy(&r, ptr, sizeof(r));
+ return r;
}
-static inline int ldsw_le_p(const void *ptr)
+static inline int ldsw_p(const void *ptr)
{
-#ifdef _ARCH_PPC
- int val;
- __asm__ __volatile__ ("lhbrx %0,0,%1" : "=r" (val) : "r" (ptr));
- return (int16_t)val;
-#else
- const uint8_t *p = ptr;
- return (int16_t)(p[0] | (p[1] << 8));
-#endif
+ int16_t r;
+ memcpy(&r, ptr, sizeof(r));
+ return r;
}
-static inline int ldl_le_p(const void *ptr)
+static inline void stw_p(void *ptr, uint16_t v)
{
-#ifdef _ARCH_PPC
- int val;
- __asm__ __volatile__ ("lwbrx %0,0,%1" : "=r" (val) : "r" (ptr));
- return val;
-#else
- const uint8_t *p = ptr;
- return p[0] | (p[1] << 8) | (p[2] << 16) | (p[3] << 24);
-#endif
+ memcpy(ptr, &v, sizeof(v));
}
-static inline uint64_t ldq_le_p(const void *ptr)
+static inline int ldl_p(const void *ptr)
{
- const uint8_t *p = ptr;
- uint32_t v1, v2;
- v1 = ldl_le_p(p);
- v2 = ldl_le_p(p + 4);
- return v1 | ((uint64_t)v2 << 32);
+ int32_t r;
+ memcpy(&r, ptr, sizeof(r));
+ return r;
}
-static inline void stw_le_p(void *ptr, int v)
-{
-#ifdef _ARCH_PPC
- __asm__ __volatile__ ("sthbrx %1,0,%2" : "=m" (*(uint16_t *)ptr) : "r" (v), "r" (ptr));
-#else
- uint8_t *p = ptr;
- p[0] = v;
- p[1] = v >> 8;
-#endif
-}
-
-static inline void stl_le_p(void *ptr, int v)
+static inline void stl_p(void *ptr, uint32_t v)
{
-#ifdef _ARCH_PPC
- __asm__ __volatile__ ("stwbrx %1,0,%2" : "=m" (*(uint32_t *)ptr) : "r" (v), "r" (ptr));
-#else
- uint8_t *p = ptr;
- p[0] = v;
- p[1] = v >> 8;
- p[2] = v >> 16;
- p[3] = v >> 24;
-#endif
+ memcpy(ptr, &v, sizeof(v));
}
-static inline void stq_le_p(void *ptr, uint64_t v)
+static inline uint64_t ldq_p(const void *ptr)
{
- uint8_t *p = ptr;
- stl_le_p(p, (uint32_t)v);
- stl_le_p(p + 4, v >> 32);
+ uint64_t r;
+ memcpy(&r, ptr, sizeof(r));
+ return r;
}
-/* float access */
-
-static inline float32 ldfl_le_p(const void *ptr)
+static inline void stq_p(void *ptr, uint64_t v)
{
- union {
- float32 f;
- uint32_t i;
- } u;
- u.i = ldl_le_p(ptr);
- return u.f;
+ memcpy(ptr, &v, sizeof(v));
}
-static inline void stfl_le_p(void *ptr, float32 v)
-{
- union {
- float32 f;
- uint32_t i;
- } u;
- u.f = v;
- stl_le_p(ptr, u.i);
-}
-
-static inline float64 ldfq_le_p(const void *ptr)
-{
- CPU_DoubleU u;
- u.l.lower = ldl_le_p(ptr);
- u.l.upper = ldl_le_p(ptr + 4);
- return u.d;
-}
-
-static inline void stfq_le_p(void *ptr, float64 v)
-{
- CPU_DoubleU u;
- u.d = v;
- stl_le_p(ptr, u.l.lower);
- stl_le_p(ptr + 4, u.l.upper);
-}
-
-#else
-
static inline int lduw_le_p(const void *ptr)
{
- return *(uint16_t *)ptr;
+ return (uint16_t)le_bswap(lduw_p(ptr), 16);
}
static inline int ldsw_le_p(const void *ptr)
{
- return *(int16_t *)ptr;
+ return (int16_t)le_bswap(lduw_p(ptr), 16);
}
static inline int ldl_le_p(const void *ptr)
{
- return *(uint32_t *)ptr;
+ return le_bswap(ldl_p(ptr), 32);
}
static inline uint64_t ldq_le_p(const void *ptr)
{
- return *(uint64_t *)ptr;
+ return le_bswap(ldq_p(ptr), 64);
}
static inline void stw_le_p(void *ptr, int v)
{
- *(uint16_t *)ptr = v;
+ stw_p(ptr, le_bswap(v, 16));
}
static inline void stl_le_p(void *ptr, int v)
{
- *(uint32_t *)ptr = v;
+ stl_p(ptr, le_bswap(v, 32));
}
static inline void stq_le_p(void *ptr, uint64_t v)
{
- *(uint64_t *)ptr = v;
+ stq_p(ptr, le_bswap(v, 64));
}
/* float access */
static inline float32 ldfl_le_p(const void *ptr)
{
- return *(float32 *)ptr;
+ CPU_FloatU u;
+ u.l = ldl_le_p(ptr);
+ return u.f;
}
-static inline float64 ldfq_le_p(const void *ptr)
+static inline void stfl_le_p(void *ptr, float32 v)
{
- return *(float64 *)ptr;
+ CPU_FloatU u;
+ u.f = v;
+ stl_le_p(ptr, u.l);
}
-static inline void stfl_le_p(void *ptr, float32 v)
+static inline float64 ldfq_le_p(const void *ptr)
{
- *(float32 *)ptr = v;
+ CPU_DoubleU u;
+ u.ll = ldq_le_p(ptr);
+ return u.d;
}
static inline void stfq_le_p(void *ptr, float64 v)
{
- *(float64 *)ptr = v;
+ CPU_DoubleU u;
+ u.d = v;
+ stq_le_p(ptr, u.ll);
}
-#endif
-
-#if !defined(HOST_WORDS_BIGENDIAN) || defined(WORDS_ALIGNED)
static inline int lduw_be_p(const void *ptr)
{
-#if defined(__i386__)
- int val;
- asm volatile ("movzwl %1, %0\n"
- "xchgb %b0, %h0\n"
- : "=q" (val)
- : "m" (*(uint16_t *)ptr));
- return val;
-#else
- const uint8_t *b = ptr;
- return ((b[0] << 8) | b[1]);
-#endif
+ return (uint16_t)be_bswap(lduw_p(ptr), 16);
}
static inline int ldsw_be_p(const void *ptr)
{
-#if defined(__i386__)
- int val;
- asm volatile ("movzwl %1, %0\n"
- "xchgb %b0, %h0\n"
- : "=q" (val)
- : "m" (*(uint16_t *)ptr));
- return (int16_t)val;
-#else
- const uint8_t *b = ptr;
- return (int16_t)((b[0] << 8) | b[1]);
-#endif
+ return (int16_t)be_bswap(lduw_p(ptr), 16);
}
static inline int ldl_be_p(const void *ptr)
{
-#if defined(__i386__) || defined(__x86_64__)
- int val;
- asm volatile ("movl %1, %0\n"
- "bswap %0\n"
- : "=r" (val)
- : "m" (*(uint32_t *)ptr));
- return val;
-#else
- const uint8_t *b = ptr;
- return (b[0] << 24) | (b[1] << 16) | (b[2] << 8) | b[3];
-#endif
+ return be_bswap(ldl_p(ptr), 32);
}
static inline uint64_t ldq_be_p(const void *ptr)
{
- uint32_t a,b;
- a = ldl_be_p(ptr);
- b = ldl_be_p((uint8_t *)ptr + 4);
- return (((uint64_t)a<<32)|b);
+ return be_bswap(ldq_p(ptr), 64);
}
static inline void stw_be_p(void *ptr, int v)
{
-#if defined(__i386__)
- asm volatile ("xchgb %b0, %h0\n"
- "movw %w0, %1\n"
- : "=q" (v)
- : "m" (*(uint16_t *)ptr), "0" (v));
-#else
- uint8_t *d = (uint8_t *) ptr;
- d[0] = v >> 8;
- d[1] = v;
-#endif
+ stw_p(ptr, be_bswap(v, 16));
}
static inline void stl_be_p(void *ptr, int v)
{
-#if defined(__i386__) || defined(__x86_64__)
- asm volatile ("bswap %0\n"
- "movl %0, %1\n"
- : "=r" (v)
- : "m" (*(uint32_t *)ptr), "0" (v));
-#else
- uint8_t *d = (uint8_t *) ptr;
- d[0] = v >> 24;
- d[1] = v >> 16;
- d[2] = v >> 8;
- d[3] = v;
-#endif
+ stl_p(ptr, be_bswap(v, 32));
}
static inline void stq_be_p(void *ptr, uint64_t v)
{
- stl_be_p(ptr, v >> 32);
- stl_be_p((uint8_t *)ptr + 4, v);
+ stq_p(ptr, be_bswap(v, 64));
}
/* float access */
static inline float32 ldfl_be_p(const void *ptr)
{
- union {
- float32 f;
- uint32_t i;
- } u;
- u.i = ldl_be_p(ptr);
+ CPU_FloatU u;
+ u.l = ldl_be_p(ptr);
return u.f;
}
static inline void stfl_be_p(void *ptr, float32 v)
{
- union {
- float32 f;
- uint32_t i;
- } u;
+ CPU_FloatU u;
u.f = v;
- stl_be_p(ptr, u.i);
+ stl_be_p(ptr, u.l);
}
static inline float64 ldfq_be_p(const void *ptr)
{
CPU_DoubleU u;
- u.l.upper = ldl_be_p(ptr);
- u.l.lower = ldl_be_p((uint8_t *)ptr + 4);
+ u.ll = ldq_be_p(ptr);
return u.d;
}
{
CPU_DoubleU u;
u.d = v;
- stl_be_p(ptr, u.l.upper);
- stl_be_p((uint8_t *)ptr + 4, u.l.lower);
+ stq_be_p(ptr, u.ll);
}
-#else
-
-static inline int lduw_be_p(const void *ptr)
+static inline unsigned long leul_to_cpu(unsigned long v)
{
- return *(uint16_t *)ptr;
-}
-
-static inline int ldsw_be_p(const void *ptr)
-{
- return *(int16_t *)ptr;
-}
-
-static inline int ldl_be_p(const void *ptr)
-{
- return *(uint32_t *)ptr;
-}
-
-static inline uint64_t ldq_be_p(const void *ptr)
-{
- return *(uint64_t *)ptr;
-}
-
-static inline void stw_be_p(void *ptr, int v)
-{
- *(uint16_t *)ptr = v;
-}
-
-static inline void stl_be_p(void *ptr, int v)
-{
- *(uint32_t *)ptr = v;
-}
-
-static inline void stq_be_p(void *ptr, uint64_t v)
-{
- *(uint64_t *)ptr = v;
-}
-
-/* float access */
-
-static inline float32 ldfl_be_p(const void *ptr)
-{
- return *(float32 *)ptr;
-}
-
-static inline float64 ldfq_be_p(const void *ptr)
-{
- return *(float64 *)ptr;
-}
-
-static inline void stfl_be_p(void *ptr, float32 v)
-{
- *(float32 *)ptr = v;
-}
-
-static inline void stfq_be_p(void *ptr, float64 v)
-{
- *(float64 *)ptr = 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
+ return le_bswap(v, 32);
+#elif ULONG_MAX == UINT64_MAX
+ return le_bswap(v, 64);
+#else
+# error Unknown sizeof long
+#endif
}
-#endif
+#undef le_bswap
+#undef be_bswap
+#undef le_bswaps
+#undef be_bswaps
#endif /* BSWAP_H */
projects / qemu.git / blobdiff