OpenBLAS/kernel/x86_64/dsymv_U_microk_haswell-2.c

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#define HAVE_KERNEL_4x4 1
static void dsymv_kernel_4x4(BLASLONG n, FLOAT *a0, FLOAT *a1, FLOAT *a2, FLOAT *a3, FLOAT *x, FLOAT *y, FLOAT *temp1, FLOAT *temp2) __attribute__ ((noinline));

static void dsymv_kernel_4x4(BLASLONG n, FLOAT *a0, FLOAT *a1, FLOAT *a2, FLOAT *a3, FLOAT *x, FLOAT *y, FLOAT *temp1, FLOAT *temp2)
{

	BLASLONG register i = 0;

	__asm__  __volatile__
	(
	"vzeroupper				     \n\t"
	"vxorpd		%%ymm0 , %%ymm0 , %%ymm0     \n\t"	// temp2[0]
	"vxorpd		%%ymm1 , %%ymm1 , %%ymm1     \n\t"	// temp2[1]
	"vxorpd		%%ymm2 , %%ymm2 , %%ymm2     \n\t"	// temp2[2]
	"vxorpd		%%ymm3 , %%ymm3 , %%ymm3     \n\t"	// temp2[3]
	"vbroadcastsd   (%8),    %%ymm4	             \n\t"	// temp1[0]
	"vbroadcastsd  8(%8),    %%ymm5	             \n\t"	// temp1[1]
	"vbroadcastsd 16(%8),    %%ymm6	             \n\t"	// temp1[1]
	"vbroadcastsd 24(%8),    %%ymm7	             \n\t"	// temp1[1]
	"xorq           %0,%0                        \n\t"

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

	"vmovups	(%3,%0,8), %%ymm9	           \n\t"  // 2 * y
	"vmovups	(%2,%0,8), %%ymm8	           \n\t"  // 2 * x

	"vmovups	(%4,%0,8), %%ymm12	           \n\t"  // 2 * a
	"vmovups	(%5,%0,8), %%ymm13	           \n\t"  // 2 * a
	"vmovups	(%6,%0,8), %%ymm14	           \n\t"  // 2 * a
	"vmovups	(%7,%0,8), %%ymm15	           \n\t"  // 2 * a

	"vfmadd231pd	%%ymm4, %%ymm12 , %%ymm9  \n\t"  // y     += temp1 * a
	"vfmadd231pd	%%ymm8, %%ymm12 , %%ymm0  \n\t"  // temp2 += x * a

	"vfmadd231pd	%%ymm5, %%ymm13 , %%ymm9  \n\t"  // y     += temp1 * a
	"vfmadd231pd	%%ymm8, %%ymm13 , %%ymm1  \n\t"  // temp2 += x * a

	"vfmadd231pd	%%ymm6, %%ymm14 , %%ymm9  \n\t"  // y     += temp1 * a
	"vfmadd231pd	%%ymm8, %%ymm14 , %%ymm2  \n\t"  // temp2 += x * a

	"vfmadd231pd	%%ymm7, %%ymm15 , %%ymm9  \n\t"  // y     += temp1 * a
	"vfmadd231pd	%%ymm8, %%ymm15 , %%ymm3  \n\t"  // temp2 += x * a
	"addq		$4 , %0	  	 	      \n\t"
	"subq		$4 , %1	  	 	      \n\t"

	"vmovups	%%ymm9 ,  -32(%3,%0,8)		   \n\t"

	"jnz		1b		      \n\t"

	"vmovsd		  (%9), %%xmm4		      \n\t"
	"vmovsd		 8(%9), %%xmm5		      \n\t"
	"vmovsd		16(%9), %%xmm6		      \n\t"
	"vmovsd		24(%9), %%xmm7		      \n\t"

	"vextractf128 $0x01, %%ymm0 , %%xmm12	      \n\t"
	"vextractf128 $0x01, %%ymm1 , %%xmm13	      \n\t"
	"vextractf128 $0x01, %%ymm2 , %%xmm14	      \n\t"
	"vextractf128 $0x01, %%ymm3 , %%xmm15	      \n\t"

	"vaddpd	        %%xmm0, %%xmm12, %%xmm0	      \n\t"
	"vaddpd	        %%xmm1, %%xmm13, %%xmm1	      \n\t"
	"vaddpd	        %%xmm2, %%xmm14, %%xmm2	      \n\t"
	"vaddpd	        %%xmm3, %%xmm15, %%xmm3	      \n\t"

	"vhaddpd        %%xmm0, %%xmm0, %%xmm0  \n\t"
	"vhaddpd        %%xmm1, %%xmm1, %%xmm1  \n\t"
	"vhaddpd        %%xmm2, %%xmm2, %%xmm2  \n\t"
	"vhaddpd        %%xmm3, %%xmm3, %%xmm3  \n\t"

	"vaddsd		%%xmm4, %%xmm0, %%xmm0  \n\t"
	"vaddsd		%%xmm5, %%xmm1, %%xmm1  \n\t"
	"vaddsd		%%xmm6, %%xmm2, %%xmm2  \n\t"
	"vaddsd		%%xmm7, %%xmm3, %%xmm3  \n\t"

	"vmovsd         %%xmm0 ,  (%9)		\n\t"	// save temp2
	"vmovsd         %%xmm1 , 8(%9)		\n\t"	// save temp2
	"vmovsd         %%xmm2 ,16(%9)		\n\t"	// save temp2
	"vmovsd         %%xmm3 ,24(%9)		\n\t"	// save temp2
	"vzeroupper				     \n\t"

	:
          "+r" (i),	// 0	
	  "+r" (n)  	// 1
        :
          "r" (x),      // 2
          "r" (y),      // 3
          "r" (a0),	// 4
          "r" (a1),	// 5
          "r" (a2),	// 6
          "r" (a3),	// 8
          "r" (temp1),  // 8
          "r" (temp2)   // 9
	: "cc", 
	  "%xmm0", "%xmm1", "%xmm2", "%xmm3", 
	  "%xmm4", "%xmm5", "%xmm6", "%xmm7", 
	  "%xmm8", "%xmm9", "%xmm10", "%xmm11", 
	  "%xmm12", "%xmm13", "%xmm14", "%xmm15",
	  "memory"
	);

}