intrinsics.h

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/*
 * Compiler-dependent intrinsics.
 *
 * Copyright (C) 2002-2003 Hewlett-Packard Co
 *  David Mosberger-Tang <[email protected]>
 */
#ifndef _UAPI_ASM_IA64_INTRINSICS_H
#define _UAPI_ASM_IA64_INTRINSICS_H


#ifndef __ASSEMBLY__

#include <linux/types.h>
/* include compiler specific intrinsics */
#include <asm/ia64regs.h>
#ifdef __INTEL_COMPILER
# include <asm/intel_intrin.h>
#else
# include <asm/gcc_intrin.h>
#endif
#include <asm/cmpxchg.h>

#define ia64_native_get_psr_i() (ia64_native_getreg(_IA64_REG_PSR) & IA64_PSR_I)

#define ia64_native_set_rr0_to_rr4(val0, val1, val2, val3, val4)    \
do {                                    \
    ia64_native_set_rr(0x0000000000000000UL, (val0));       \
    ia64_native_set_rr(0x2000000000000000UL, (val1));       \
    ia64_native_set_rr(0x4000000000000000UL, (val2));       \
    ia64_native_set_rr(0x6000000000000000UL, (val3));       \
    ia64_native_set_rr(0x8000000000000000UL, (val4));       \
} while (0)

/*
 * Force an unresolved reference if someone tries to use
 * ia64_fetch_and_add() with a bad value.
 */
extern unsigned long __bad_size_for_ia64_fetch_and_add (void);
extern unsigned long __bad_increment_for_ia64_fetch_and_add (void);

#define IA64_FETCHADD(tmp,v,n,sz,sem)                       \
({                                      \
    switch (sz) {                               \
          case 4:                               \
            tmp = ia64_fetchadd4_##sem((unsigned int *) v, n);      \
        break;                              \
                                        \
          case 8:                               \
            tmp = ia64_fetchadd8_##sem((unsigned long *) v, n);     \
        break;                              \
                                        \
          default:                              \
        __bad_size_for_ia64_fetch_and_add();                \
    }                                   \
})

#define ia64_fetchadd(i,v,sem)                              \
({                                          \
    __u64 _tmp;                                 \
    volatile __typeof__(*(v)) *_v = (v);                        \
    /* Can't use a switch () here: gcc isn't always smart enough for that... */ \
    if ((i) == -16)                                 \
        IA64_FETCHADD(_tmp, _v, -16, sizeof(*(v)), sem);            \
    else if ((i) == -8)                             \
        IA64_FETCHADD(_tmp, _v, -8, sizeof(*(v)), sem);             \
    else if ((i) == -4)                             \
        IA64_FETCHADD(_tmp, _v, -4, sizeof(*(v)), sem);             \
    else if ((i) == -1)                             \
        IA64_FETCHADD(_tmp, _v, -1, sizeof(*(v)), sem);             \
    else if ((i) == 1)                              \
        IA64_FETCHADD(_tmp, _v, 1, sizeof(*(v)), sem);              \
    else if ((i) == 4)                              \
        IA64_FETCHADD(_tmp, _v, 4, sizeof(*(v)), sem);              \
    else if ((i) == 8)                              \
        IA64_FETCHADD(_tmp, _v, 8, sizeof(*(v)), sem);              \
    else if ((i) == 16)                             \
        IA64_FETCHADD(_tmp, _v, 16, sizeof(*(v)), sem);             \
    else                                        \
        _tmp = __bad_increment_for_ia64_fetch_and_add();            \
    (__typeof__(*(v))) (_tmp);  /* return old value */              \
})

#define ia64_fetch_and_add(i,v) (ia64_fetchadd(i, v, rel) + (i)) /* return new value */

#endif


#ifndef __ASSEMBLY__

#define IA64_INTRINSIC_API(name)    ia64_native_ ## name
#define IA64_INTRINSIC_MACRO(name)  ia64_native_ ## name


/************************************************/
/* Instructions paravirtualized for correctness */
/************************************************/
/* fc, thash, get_cpuid, get_pmd, get_eflags, set_eflags */
/* Note that "ttag" and "cover" are also privilege-sensitive; "ttag"
 * is not currently used (though it may be in a long-format VHPT system!)
 */
#define ia64_fc             IA64_INTRINSIC_API(fc)
#define ia64_thash          IA64_INTRINSIC_API(thash)
#define ia64_get_cpuid          IA64_INTRINSIC_API(get_cpuid)
#define ia64_get_pmd            IA64_INTRINSIC_API(get_pmd)


/************************************************/
/* Instructions paravirtualized for performance */
/************************************************/
#define ia64_ssm            IA64_INTRINSIC_MACRO(ssm)
#define ia64_rsm            IA64_INTRINSIC_MACRO(rsm)
#define ia64_getreg         IA64_INTRINSIC_MACRO(getreg)
#define ia64_setreg         IA64_INTRINSIC_API(setreg)
#define ia64_set_rr         IA64_INTRINSIC_API(set_rr)
#define ia64_get_rr         IA64_INTRINSIC_API(get_rr)
#define ia64_ptcga          IA64_INTRINSIC_API(ptcga)
#define ia64_get_psr_i          IA64_INTRINSIC_API(get_psr_i)
#define ia64_intrin_local_irq_restore   \
    IA64_INTRINSIC_API(intrin_local_irq_restore)
#define ia64_set_rr0_to_rr4     IA64_INTRINSIC_API(set_rr0_to_rr4)

#endif /* !__ASSEMBLY__ */

#endif /* _UAPI_ASM_IA64_INTRINSICS_H */