OpenBLAS/kernel/x86_64/ddot_microk_steamroller-2.c

/***************************************************************************
Copyright (c) 2014, The OpenBLAS Project
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#define HAVE_KERNEL_8 1
static void ddot_kernel_8( BLASLONG n, FLOAT *x, FLOAT *y , FLOAT *dot) __attribute__ ((noinline));

static void ddot_kernel_8( BLASLONG n, FLOAT *x, FLOAT *y, FLOAT *dot)
{


	BLASLONG register i = 0;

	__asm__  __volatile__
	(
	"vzeroupper					     \n\t"
	"vxorpd		%%xmm4, %%xmm4, %%xmm4	             \n\t"
	"vxorpd		%%xmm5, %%xmm5, %%xmm5	             \n\t"
	"vxorpd		%%xmm6, %%xmm6, %%xmm6	             \n\t"
	"vxorpd		%%xmm7, %%xmm7, %%xmm7	             \n\t"

	".align 16				             \n\t"
	"1:				             \n\t"
        "vmovups                  (%2,%0,8), %%xmm12         \n\t"  // 2 * x
        "vmovups                16(%2,%0,8), %%xmm13         \n\t"  // 2 * x
        "vmovups                32(%2,%0,8), %%xmm14         \n\t"  // 2 * x
        "vmovups                48(%2,%0,8), %%xmm15         \n\t"  // 2 * x

	"vfmadd231pd         (%3,%0,8), %%xmm12, %%xmm4 \n\t"  // 2 * y
        "vmovups                64(%2,%0,8), %%xmm0         \n\t"  // 2 * x
        "vmovups                80(%2,%0,8), %%xmm1         \n\t"  // 2 * x
	"vfmadd231pd       16(%3,%0,8), %%xmm13, %%xmm5 \n\t"  // 2 * y
        "vmovups                96(%2,%0,8), %%xmm2         \n\t"  // 2 * x
        "vmovups               112(%2,%0,8), %%xmm3         \n\t"  // 2 * x
	"vfmadd231pd       32(%3,%0,8), %%xmm14, %%xmm6 \n\t"  // 2 * y
	"vfmadd231pd       48(%3,%0,8), %%xmm15, %%xmm7 \n\t"  // 2 * y


	"vfmadd231pd       64(%3,%0,8), %%xmm0 , %%xmm4 \n\t"  // 2 * y
	"vfmadd231pd       80(%3,%0,8), %%xmm1 , %%xmm5 \n\t"  // 2 * y
	"vfmadd231pd       96(%3,%0,8), %%xmm2 , %%xmm6 \n\t"  // 2 * y
	"vfmadd231pd      112(%3,%0,8), %%xmm3 , %%xmm7 \n\t"  // 2 * y

	"addq		$16 , %0	  	 	             \n\t"
	"subq	        $16 , %1			             \n\t"		

	"jnz		1b		             \n\t"

	"vaddpd        %%xmm4, %%xmm5, %%xmm4	\n\t"
	"vaddpd        %%xmm6, %%xmm7, %%xmm6	\n\t"
	"vaddpd        %%xmm4, %%xmm6, %%xmm4	\n\t"

	"vhaddpd        %%xmm4, %%xmm4, %%xmm4	\n\t"

	"vmovsd		%%xmm4,    (%4)		\n\t"
	"vzeroupper					     \n\t"

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

}