/***************************************************************************
Copyright (c) 2014, The OpenBLAS Project
All rights reserved.
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modification, are permitted provided that the following conditions are
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its contributors may be used to endorse or promote products
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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*****************************************************************************/

#define HAVE_KERNEL_4 1
static void zaxpy_kernel_4( BLASLONG n, FLOAT *x, FLOAT *y , FLOAT *alpha) __attribute__ ((noinline));

static void zaxpy_kernel_4( BLASLONG n, FLOAT *x, FLOAT *y, FLOAT *alpha)
{

#if !defined(CONJ)
	FLOAT mvec[4] = { -1.0, 1.0, -1.0, 1.0 };
#else
	FLOAT mvec[4] = { 1.0, -1.0, 1.0, -1.0 };
#endif

	BLASLONG register i = 0;

	__asm__  __volatile__
	(
	"vzeroupper					    \n\t"
	"vbroadcastsd		(%4), %%ymm0		    \n\t"  // real part of alpha
	"vbroadcastsd	       8(%4), %%ymm1		    \n\t"  // imag part of alpha
#if !defined(CONJ)
	"vmulpd		(%5), %%ymm1 , %%ymm1		    \n\t"
#else
	"vmulpd		(%5), %%ymm0 , %%ymm0		    \n\t"
#endif

	".p2align 4				            \n\t"
	"1:				            \n\t"

	"vmovups        (%2,%0,8), %%ymm5                   \n\t" // 2 complex values from x
	".p2align 1					    \n\t"
	"vmovups      32(%2,%0,8), %%ymm7                   \n\t" // 2 complex values from x
	"vmovups      64(%2,%0,8), %%ymm9                   \n\t" // 2 complex values from x
	"vmovups      96(%2,%0,8), %%ymm11                  \n\t" // 2 complex values from x

	"vmovups     128(%2,%0,8), %%ymm12                  \n\t" // 2 complex values from x
	"vmovups     160(%2,%0,8), %%ymm13                  \n\t" // 2 complex values from x
	"vmovups     192(%2,%0,8), %%ymm14                  \n\t" // 2 complex values from x
	"vmovups     224(%2,%0,8), %%ymm15                  \n\t" // 2 complex values from x

	"vpermilpd	$0x5 , %%ymm5 , %%ymm4 	    \n\t"  // exchange real and imag part
	"vpermilpd	$0x5 , %%ymm7 , %%ymm6 	    \n\t"  // exchange real and imag part
	"vpermilpd	$0x5 , %%ymm9 , %%ymm8 	    \n\t"  // exchange real and imag part
	"vpermilpd	$0x5 , %%ymm11, %%ymm10 	    \n\t"  // exchange real and imag part

	"vfmadd213pd    (%3,%0,8), %%ymm0 , %%ymm5          \n\t"
	".p2align 1					    \n\t"
	"vfmadd213pd  32(%3,%0,8), %%ymm0 , %%ymm7          \n\t"
	"vfmadd213pd  64(%3,%0,8), %%ymm0 , %%ymm9          \n\t"
	"vfmadd213pd  96(%3,%0,8), %%ymm0 , %%ymm11         \n\t"

	"vfmadd231pd	%%ymm1 , %%ymm4 , %%ymm5   \n\t"
	"vfmadd231pd	%%ymm1 , %%ymm6 , %%ymm7   \n\t"
	"vfmadd231pd	%%ymm1 , %%ymm8 , %%ymm9   \n\t"
	"vfmadd231pd	%%ymm1 , %%ymm10, %%ymm11  \n\t"

	"vpermilpd	$0x5 , %%ymm12, %%ymm4 	    \n\t"  // exchange real and imag part
	"vpermilpd	$0x5 , %%ymm13, %%ymm6 	    \n\t"  // exchange real and imag part
	"vpermilpd	$0x5 , %%ymm14, %%ymm8 	    \n\t"  // exchange real and imag part
	"vpermilpd	$0x5 , %%ymm15, %%ymm10 	    \n\t"  // exchange real and imag part

	"vfmadd213pd 128(%3,%0,8), %%ymm0 , %%ymm12         \n\t"
	"vfmadd213pd 160(%3,%0,8), %%ymm0 , %%ymm13         \n\t"
	"vfmadd213pd 192(%3,%0,8), %%ymm0 , %%ymm14         \n\t"
	"vfmadd213pd 224(%3,%0,8), %%ymm0 , %%ymm15         \n\t"

	"vfmadd231pd	%%ymm1 , %%ymm4 , %%ymm12  \n\t"
	"vfmadd231pd	%%ymm1 , %%ymm6 , %%ymm13  \n\t"
	"vfmadd231pd	%%ymm1 , %%ymm8 , %%ymm14  \n\t"
	"vfmadd231pd	%%ymm1 , %%ymm10, %%ymm15  \n\t"

	"vmovups	%%ymm5 ,   (%3,%0,8)		    \n\t"
	".p2align 1					    \n\t"
	"vmovups	%%ymm7 , 32(%3,%0,8)		    \n\t"
	"vmovups	%%ymm9 , 64(%3,%0,8)		    \n\t"
	"vmovups	%%ymm11, 96(%3,%0,8)		    \n\t"

	"vmovups	%%ymm12,128(%3,%0,8)		    \n\t"
	"vmovups	%%ymm13,160(%3,%0,8)		    \n\t"
	"vmovups	%%ymm14,192(%3,%0,8)		    \n\t"
	"vmovups	%%ymm15,224(%3,%0,8)		    \n\t"

	"addq		$32, %0	  	 	             \n\t"
	"subq	        $16, %1			             \n\t"		
	"jnz		1b		             \n\t"
	"vzeroupper					    \n\t"

	: 
          "+r" (i),	// 0	
	  "+r" (n)  	// 1
        :
          "r" (x),      // 2
          "r" (y),      // 3
          "r" (alpha),  // 4
          "r" (mvec)    // 5
	: "cc", 
	  "%xmm0", "%xmm1", "%xmm2", "%xmm3",
	  "%xmm4", "%xmm5", "%xmm6", "%xmm7", 
	  "%xmm8", "%xmm9", "%xmm10", "%xmm11", 
	  "%xmm12", "%xmm13", "%xmm14", "%xmm15", 
	  "memory"
	);


} 

