OpenBLAS/common_arm64.h

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      its contributors may be used to endorse or promote products 
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AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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**********************************************************************************/

#ifndef COMMON_ARM64
#define COMMON_ARM64

#define MB   __asm__ __volatile__ ("dmb  ish" : : : "memory")
#define WMB  __asm__ __volatile__ ("dmb  ishst" : : : "memory")
#define RMB  __asm__ __volatile__ ("dmb  ishld" : : : "memory")

#define INLINE inline

#if defined( F_INTERFACE_FLANG) || defined(F_INTERFACE_PGI)
#define RETURN_BY_STACK
#else
#define RETURN_BY_COMPLEX
#endif

#ifndef ASSEMBLER


static void __inline blas_lock(volatile BLASULONG *address){

  BLASULONG ret;

  do {
    __asm__ __volatile__(
			 "mov	x4, #1							\n\t"
			 "sevl								\n\t"
                         "1:                                                            \n\t"
                         "wfe                                                           \n\t"
			 "2:								\n\t"
                         "ldaxr x2, [%1]                                                \n\t"
                         "cbnz  x2, 1b                                                  \n\t"
                         "stxr  w3, x4, [%1]                                            \n\t"
                         "cbnz  w3, 2b                                                  \n\t"
                         "mov   %0, #0                                                  \n\t"
                         : "=r"(ret), "=r"(address)
                         : "1"(address)
                         : "memory", "x2" , "x3", "x4"


    );


  } while (ret);

}

#define BLAS_LOCK_DEFINED

#if !defined(OS_DARWIN) && !defined (OS_ANDROID)
static __inline BLASULONG rpcc(void){
  BLASULONG ret = 0;
  blasint shift;
 
  __asm__ __volatile__ ("isb; mrs %0,cntvct_el0":"=r"(ret));
  __asm__ __volatile__ ("mrs %0,cntfrq_el0; clz %w0, %w0":"=&r"(shift));

  return ret << shift;
}

#define RPCC_DEFINED
#define RPCC64BIT
#endif 

static inline int blas_quickdivide(blasint x, blasint y){
  return x / y;
}

#if defined(DOUBLE)
#define GET_IMAGE(res)  __asm__ __volatile__("str d1, %0" : "=m"(res) : : "memory")
#else
#define GET_IMAGE(res)  __asm__ __volatile__("str s1, %0" : "=m"(res) : : "memory")
#endif

#define GET_IMAGE_CANCEL

#endif


#ifndef F_INTERFACE
#define REALNAME ASMNAME
#else
#define REALNAME ASMFNAME
#endif

#if defined(ASSEMBLER) && !defined(NEEDPARAM)

.macro PROLOGUE 
	.text ;
	.p2align 2 ;
	.global	REALNAME ;
#ifndef __APPLE__
	.type	REALNAME, %function ;
#endif
REALNAME:
.endm


#define EPILOGUE

#define PROFCODE

#endif


#define SEEK_ADDRESS

#ifndef PAGESIZE
#define PAGESIZE        ( 4 << 10)
#endif
#define HUGE_PAGESIZE   ( 4 << 20)

#ifndef BUFFERSIZE
#define BUFFER_SIZE     (32 << 20)
#else
#define BUFFER_SIZE	(32 << BUFFERSIZE)
#endif

#define BASE_ADDRESS (START_ADDRESS - BUFFER_SIZE * MAX_CPU_NUMBER)

#ifndef MAP_ANONYMOUS
#define MAP_ANONYMOUS MAP_ANON
#endif

#endif