OpenBLAS/kernel/x86_64/ssymv_U_microk_nehalem-2.c

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#define HAVE_KERNEL_4x4 1
static void ssymv_kernel_4x4( BLASLONG n, FLOAT *a0, FLOAT *a1, FLOAT *a2, FLOAT *a3,  FLOAT *x, FLOAT *y, FLOAT *temp1, FLOAT *temp2) __attribute__ ((noinline));

static void ssymv_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__
	(
	"xorps          %%xmm0 , %%xmm0              \n\t"	// temp2[0]
	"xorps          %%xmm1 , %%xmm1              \n\t"	// temp2[1]
	"xorps          %%xmm2 , %%xmm2              \n\t"	// temp2[2]
	"xorps          %%xmm3 , %%xmm3              \n\t"	// temp2[3]
	"movss	       (%8),    %%xmm4	             \n\t"	// temp1[0]
	"movss        4(%8),    %%xmm5	             \n\t"	// temp1[1]
	"movss        8(%8),    %%xmm6	             \n\t"	// temp1[2]
	"movss       12(%8),    %%xmm7	             \n\t"	// temp1[3]
	"shufps $0,  %%xmm4, %%xmm4                  \n\t"
	"shufps $0,  %%xmm5, %%xmm5                  \n\t"
	"shufps $0,  %%xmm6, %%xmm6                  \n\t"
	"shufps $0,  %%xmm7, %%xmm7                  \n\t"

	"xorq		%0,%0			     \n\t"

	".p2align 4		  		       \n\t"
	"1:				       \n\t"
	"movups	            (%2,%0,4), %%xmm8	       \n\t"	// 4 * x
	"movups	            (%3,%0,4), %%xmm9         \n\t"	// 4 * y

	"movups	            (%4,%0,4), %%xmm12	       \n\t"	// 4 * a
	"movups	            (%5,%0,4), %%xmm13	       \n\t"	// 4 * a

	"movups		    %%xmm12  , %%xmm11	       \n\t"
	"mulps		    %%xmm4   , %%xmm11	       \n\t"    // temp1 * a
	"addps		    %%xmm11  , %%xmm9	       \n\t"    // y += temp1 * a
	"mulps		    %%xmm8   , %%xmm12	       \n\t"    // a * x
	"addps		    %%xmm12  , %%xmm0 	       \n\t"    // temp2 += x * a

	"movups	            (%6,%0,4), %%xmm14	       \n\t"	// 4 * a
	"movups	            (%7,%0,4), %%xmm15	       \n\t"	// 4 * a

	"movups		    %%xmm13  , %%xmm11	       \n\t"
	"mulps		    %%xmm5   , %%xmm11	       \n\t"    // temp1 * a
	"addps		    %%xmm11  , %%xmm9	       \n\t"    // y += temp1 * a
	"mulps		    %%xmm8   , %%xmm13	       \n\t"    // a * x
	"addps		    %%xmm13  , %%xmm1 	       \n\t"    // temp2 += x * a

	"movups		    %%xmm14  , %%xmm11	       \n\t"
	"mulps		    %%xmm6   , %%xmm11	       \n\t"    // temp1 * a
	"addps		    %%xmm11  , %%xmm9	       \n\t"    // y += temp1 * a
	"mulps		    %%xmm8   , %%xmm14	       \n\t"    // a * x
	"addps		    %%xmm14  , %%xmm2 	       \n\t"    // temp2 += x * a

	"movups		    %%xmm15  , %%xmm11	       \n\t"
	"mulps		    %%xmm7   , %%xmm11	       \n\t"    // temp1 * a
	"addps		    %%xmm11  , %%xmm9	       \n\t"    // y += temp1 * a
	"mulps		    %%xmm8   , %%xmm15	       \n\t"    // a * x
	"addps		    %%xmm15  , %%xmm3 	       \n\t"    // temp2 += x * a

	"movups             %%xmm9,   (%3,%0,4)       \n\t"    // 4 * y

        "addq		$4 , %0	  	 	      \n\t"
	"subq	        $4 , %1			      \n\t"		
	"jnz		1b		      \n\t"

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

	"movss         %%xmm0 ,   (%9)		\n\t"	// save temp2
	"movss         %%xmm1 ,  4(%9)		\n\t"	// save temp2
	"movss         %%xmm2 ,  8(%9)		\n\t"	// save temp2
	"movss         %%xmm3 , 12(%9)		\n\t"	// save temp2

	:
          "+r" (i),	// 0	
	  "+r" (n)  	// 1
        :
          "r" (x),      // 2
          "r" (y),      // 3
          "r" (a0),     // 4
          "r" (a1),     // 5
          "r" (a2),     // 6
          "r" (a3),     // 7
          "r" (temp1),  // 8
          "r" (temp2)   // 9
	: "cc", 
	  "%xmm0", "%xmm1", "%xmm2", "%xmm3", 
	  "%xmm4", "%xmm5", "%xmm6", "%xmm7", 
	  "%xmm8", "%xmm9", "%xmm10", "%xmm11", 
	  "%xmm12", "%xmm13", "%xmm14", "%xmm15",
	  "memory"
	);

}