OpenBLAS/kernel/x86_64/sgemv_t_microk_bulldozer-4.c

/***************************************************************************
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#define HAVE_KERNEL_4x4 1
static void sgemv_kernel_4x4( BLASLONG n, FLOAT **ap, FLOAT *x, FLOAT *y) __attribute__ ((noinline));

static void sgemv_kernel_4x4( BLASLONG n, FLOAT **ap, FLOAT *x, FLOAT *y)
{

	BLASLONG register i = 0;

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

	"testq		$0x04, %1		       \n\t"
	"jz		2f		       \n\t"

        "vmovups        (%2,%0,4), %%xmm12             \n\t"  // 4 * x
	"vfmaddps %%xmm4,   (%4,%0,4), %%xmm12, %%xmm4 \n\t" 
	"vfmaddps %%xmm5,   (%5,%0,4), %%xmm12, %%xmm5 \n\t" 
	"vfmaddps %%xmm6,   (%6,%0,4), %%xmm12, %%xmm6 \n\t" 
	"vfmaddps %%xmm7,   (%7,%0,4), %%xmm12, %%xmm7 \n\t" 
        "addq		$4 , %0	  	 	       \n\t"
	"subq	        $4 , %1			       \n\t"		

	"2:				       \n\t"

	"testq		$0x08, %1		       \n\t"
	"jz		3f		       \n\t"

        "vmovups        (%2,%0,4), %%xmm12             \n\t"  // 4 * x
        "vmovups      16(%2,%0,4), %%xmm13             \n\t"  // 4 * x
	"vfmaddps %%xmm4,   (%4,%0,4), %%xmm12, %%xmm4 \n\t" 
	"vfmaddps %%xmm5,   (%5,%0,4), %%xmm12, %%xmm5 \n\t" 
	"vfmaddps %%xmm6,   (%6,%0,4), %%xmm12, %%xmm6 \n\t" 
	"vfmaddps %%xmm7,   (%7,%0,4), %%xmm12, %%xmm7 \n\t" 
	"vfmaddps %%xmm4, 16(%4,%0,4), %%xmm13, %%xmm4 \n\t" 
	"vfmaddps %%xmm5, 16(%5,%0,4), %%xmm13, %%xmm5 \n\t" 
	"vfmaddps %%xmm6, 16(%6,%0,4), %%xmm13, %%xmm6 \n\t" 
	"vfmaddps %%xmm7, 16(%7,%0,4), %%xmm13, %%xmm7 \n\t" 

        "addq		$8 , %0	  	 	       \n\t"
	"subq	        $8 , %1			       \n\t"		

	"3:				       \n\t"

	"cmpq		$0, %1		               \n\t"
	"je		4f		       \n\t"

	".align 16				       \n\t"
	"1:				       \n\t"
        "vmovups        (%2,%0,4), %%xmm12             \n\t"  // 4 * x

	"prefetcht0	 384(%4,%0,4)		       \n\t"
	"vfmaddps %%xmm4,   (%4,%0,4), %%xmm12, %%xmm4 \n\t" 
	"vfmaddps %%xmm5,   (%5,%0,4), %%xmm12, %%xmm5 \n\t" 
        "vmovups      16(%2,%0,4), %%xmm13             \n\t"  // 4 * x
	"vfmaddps %%xmm6,   (%6,%0,4), %%xmm12, %%xmm6 \n\t" 
	"vfmaddps %%xmm7,   (%7,%0,4), %%xmm12, %%xmm7 \n\t" 
	"prefetcht0	 384(%5,%0,4)		       \n\t"
	".align 2				       \n\t"
	"vfmaddps %%xmm4, 16(%4,%0,4), %%xmm13, %%xmm4 \n\t" 
	"vfmaddps %%xmm5, 16(%5,%0,4), %%xmm13, %%xmm5 \n\t" 
        "vmovups      32(%2,%0,4), %%xmm14             \n\t"  // 4 * x
	"vfmaddps %%xmm6, 16(%6,%0,4), %%xmm13, %%xmm6 \n\t" 
	"vfmaddps %%xmm7, 16(%7,%0,4), %%xmm13, %%xmm7 \n\t" 
	"prefetcht0	 384(%6,%0,4)		       \n\t"
	".align 2				       \n\t"
	"vfmaddps %%xmm4, 32(%4,%0,4), %%xmm14, %%xmm4 \n\t" 
	"vfmaddps %%xmm5, 32(%5,%0,4), %%xmm14, %%xmm5 \n\t" 
        "vmovups      48(%2,%0,4), %%xmm15             \n\t"  // 4 * x
	"vfmaddps %%xmm6, 32(%6,%0,4), %%xmm14, %%xmm6 \n\t" 
	"vfmaddps %%xmm7, 32(%7,%0,4), %%xmm14, %%xmm7 \n\t" 
	"prefetcht0	 384(%7,%0,4)		       \n\t"
	"vfmaddps %%xmm4, 48(%4,%0,4), %%xmm15, %%xmm4 \n\t" 
        "addq		$16, %0	  	 	       \n\t"
	"vfmaddps %%xmm5,-16(%5,%0,4), %%xmm15, %%xmm5 \n\t" 
	"vfmaddps %%xmm6,-16(%6,%0,4), %%xmm15, %%xmm6 \n\t" 
	"subq	        $16, %1			       \n\t"		
	"vfmaddps %%xmm7,-16(%7,%0,4), %%xmm15, %%xmm7 \n\t" 

	"jnz		1b		       \n\t"

	"4:				\n\t"
	"vhaddps        %%xmm4, %%xmm4, %%xmm4	\n\t"
	"vhaddps        %%xmm5, %%xmm5, %%xmm5	\n\t"
	"vhaddps        %%xmm6, %%xmm6, %%xmm6	\n\t"
	"vhaddps        %%xmm7, %%xmm7, %%xmm7	\n\t"

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

	"vmovss		%%xmm4,    (%3)		\n\t"
	"vmovss		%%xmm5,   4(%3)		\n\t"
	"vmovss		%%xmm6,   8(%3)		\n\t"
	"vmovss		%%xmm7,  12(%3)		\n\t"

	:
          "+r" (i),	// 0	
	  "+r" (n)  	// 1
        : 
          "r" (x),      // 2
          "r" (y),      // 3
          "r" (ap[0]),  // 4
          "r" (ap[1]),  // 5
          "r" (ap[2]),  // 6
          "r" (ap[3])   // 7
	: "cc", 
	  "%xmm4", "%xmm5", 
	  "%xmm6", "%xmm7", 
	  "%xmm12", "%xmm13", "%xmm14", "%xmm15",
	  "memory"
	);

}