OSchip
/
OpenBLAS

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/**************************************************************************************
* 2016/03/27 Werner Saar (wernsaar@googlemail.com)
*
* I don't use fused multiply-add ( precision problems with lapack )
*
* 	 BLASTEST 		: OK
* 	 CTEST			: OK
* 	 TEST			: OK
*	 LAPACK-TEST		: OK
**************************************************************************************/

#define HAVE_KERNEL_16 1

static void drot_kernel_16( BLASLONG n, FLOAT *x, FLOAT *y, FLOAT *c, FLOAT *s) __attribute__ ((noinline));

static void drot_kernel_16( BLASLONG n, FLOAT *x, FLOAT *y, FLOAT *c, FLOAT *s)
{


	BLASLONG i = n;
	BLASLONG o16 = 16;
	BLASLONG o32 = 32;
	BLASLONG o48 = 48;
	FLOAT *x1=x;
	FLOAT *y1=y;
	FLOAT *x2=x+1;
	FLOAT *y2=y+1;

	__asm__  __volatile__
	(

        "lxsdx          36 , %5, %3                          \n\t"	// load c
        "lxsdx          37 , %5, %4                          \n\t"	// load s
	"addi		%8 , %8, -8			     \n\t"
	"addi		%9 , %9, -8			     \n\t"

        "xxspltd        36 , 36, 0                           \n\t"
        "xxspltd        37 , 37, 0                           \n\t"

	"lxvd2x		32, 0, %1			    \n\t"	// load x
	"lxvd2x		33, %5, %1			    \n\t"
	"lxvd2x		34, %6, %1			    \n\t"
	"lxvd2x		35, %7, %1			    \n\t"

	"lxvd2x		40, 0, %2			    \n\t"	// load y
	"lxvd2x		41, %5, %2			    \n\t"
	"lxvd2x		42, %6, %2			    \n\t"
	"lxvd2x		43, %7, %2			    \n\t"

	"addi		%1, %1, 64			    \n\t"
	"addi		%2, %2, 64			    \n\t"

	"addic.		%0 , %0	, -8  	 	             \n\t"
	"ble		2f		             	     \n\t"

	".align 5				            \n\t"
	"1:				                    \n\t"

	"xvmuldp	48, 32, 36		    	    \n\t"	// c * x
	"xvmuldp	49, 33, 36		    	    \n\t"
	"xvmuldp	50, 34, 36		    	    \n\t"
	"xvmuldp	51, 35, 36		    	    \n\t"

	"xvmuldp	56, 40, 36		    	    \n\t"	// c * y
	"xvmuldp	57, 41, 36		    	    \n\t"
	"xvmuldp	58, 42, 36		    	    \n\t"
	"xvmuldp	59, 43, 36		    	    \n\t"

	"xvmuldp	52, 32, 37		    	    \n\t"	// s * x
	"xvmuldp	53, 33, 37		    	    \n\t"

	"lxvd2x		32, 0, %1			    \n\t"	// load x
	"lxvd2x		33, %5, %1			    \n\t"

	"xvmuldp	54, 34, 37		    	    \n\t"
	"xvmuldp	55, 35, 37		    	    \n\t"

	"lxvd2x		34, %6, %1			    \n\t"
	"lxvd2x		35, %7, %1			    \n\t"

	"xvmuldp	60, 40, 37		    	    \n\t"	// s * y
	"xvmuldp	61, 41, 37		    	    \n\t"

	"lxvd2x		40, 0, %2			    \n\t"	// load y
	"lxvd2x		41, %5, %2			    \n\t"

	"xvmuldp	62, 42, 37		    	    \n\t"
	"xvmuldp	63, 43, 37		    	    \n\t"

	"lxvd2x		42, %6, %2			    \n\t"
	"lxvd2x		43, %7, %2			    \n\t"

	"xvadddp	48, 48 , 60			    \n\t"	// c * x + s * y 
	"xvadddp	49, 49 , 61			    \n\t"	// c * x + s * y 

	"addi		%1, %1, 64			    \n\t"
	"addi		%2, %2, 64			    \n\t"

	"xvadddp	50, 50 , 62			    \n\t"	// c * x + s * y 
	"xvadddp	51, 51 , 63			    \n\t"	// c * x + s * y 

	"xvsubdp	56, 56 , 52			    \n\t"	// c * y - s * x
	"xvsubdp	57, 57 , 53			    \n\t"	// c * y - s * x
	"xvsubdp	58, 58 , 54			    \n\t"	// c * y - s * x
	"xvsubdp	59, 59 , 55			    \n\t"	// c * y - s * x

	"stxvd2x	48, 0, %8			    \n\t"	// store x
	"stxvd2x	49, %5, %8			    \n\t"
	"stxvd2x	50, %6, %8			    \n\t"
	"stxvd2x	51, %7, %8			    \n\t"

	"stxvd2x	56, 0, %9			    \n\t"	// store y
	"stxvd2x	57, %5, %9			    \n\t"
	"stxvd2x	58, %6, %9			    \n\t"
	"stxvd2x	59, %7, %9			    \n\t"

	"addi		%8, %8, 64			    \n\t"
	"addi		%9, %9, 64			    \n\t"

	"addic.		%0 , %0	, -8  	 	             \n\t"
	"bgt		1b		             	     \n\t"

	"2:						     \n\t"

	"xvmuldp	48, 32, 36		    	    \n\t"	// c * x
	"xvmuldp	49, 33, 36		    	    \n\t"
	"xvmuldp	50, 34, 36		    	    \n\t"
	"xvmuldp	51, 35, 36		    	    \n\t"

	"xvmuldp	56, 40, 36		    	    \n\t"	// c * y
	"xvmuldp	57, 41, 36		    	    \n\t"
	"xvmuldp	58, 42, 36		    	    \n\t"
	"xvmuldp	59, 43, 36		    	    \n\t"

	"xvmuldp	52, 32, 37		    	    \n\t"	// s * x
	"xvmuldp	53, 33, 37		    	    \n\t"
	"xvmuldp	54, 34, 37		    	    \n\t"
	"xvmuldp	55, 35, 37		    	    \n\t"

	"xvmuldp	60, 40, 37		    	    \n\t"	// s * y
	"xvmuldp	61, 41, 37		    	    \n\t"
	"xvmuldp	62, 42, 37		    	    \n\t"
	"xvmuldp	63, 43, 37		    	    \n\t"

	"xvadddp	48, 48 , 60			    \n\t"	// c * x + s * y 
	"xvadddp	49, 49 , 61			    \n\t"	// c * x + s * y 
	"xvadddp	50, 50 , 62			    \n\t"	// c * x + s * y 
	"xvadddp	51, 51 , 63			    \n\t"	// c * x + s * y 

	"xvsubdp	56, 56 , 52			    \n\t"	// c * y - s * x
	"xvsubdp	57, 57 , 53			    \n\t"	// c * y - s * x
	"xvsubdp	58, 58 , 54			    \n\t"	// c * y - s * x
	"xvsubdp	59, 59 , 55			    \n\t"	// c * y - s * x

	"stxvd2x	48, 0, %8			    \n\t"	// store x
	"stxvd2x	49, %5, %8			    \n\t"
	"stxvd2x	50, %6, %8			    \n\t"
	"stxvd2x	51, %7, %8			    \n\t"

	"stxvd2x	56, 0, %9			    \n\t"	// store y
	"stxvd2x	57, %5, %9			    \n\t"
	"stxvd2x	58, %6, %9			    \n\t"
	"stxvd2x	59, %7, %9			    \n\t"


	:
        : 
          "r" (i),	// 0	
	  "r" (x1),  	// 1
          "r" (y1),     // 2
          "r" (c),      // 3
          "r" (s),      // 4
	  "r" (o16),	// 5
	  "r" (o32),	// 6
	  "r" (o48),    // 7
	  "r" (x2),     // 8
	  "r" (y2)      // 9
	: "cr0", "%0", "%1" , "%2", "%8", "%9", "memory"
	);

}