OpenBLAS/kernel/power/drot_microk_power8.c

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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 (long n, double *x, double *y, double c, double s)
{
  __vector double t0;
  __vector double t1;
  __vector double t2;
  __vector double t3;
  __vector double t4;
  __vector double t5;
  __vector double t6;
  __vector double t7;

  __asm__
    (
       XXSPLTD_S(36,%x13,0)	// load c to both dwords
       XXSPLTD_S(37,%x14,0)	// load s to both dwords

       "lxvd2x		32, 0, %3	\n\t"	// load x
       "lxvd2x		33, %15, %3	\n\t"
       "lxvd2x		34, %16, %3	\n\t"
       "lxvd2x		35, %17, %3	\n\t"

       "lxvd2x		48, 0, %4	\n\t"	// load y
       "lxvd2x		49, %15, %4	\n\t"
       "lxvd2x		50, %16, %4	\n\t"
       "lxvd2x		51, %17, %4	\n\t"

       "addi		%3, %3, 64	\n\t"
       "addi		%4, %4, 64	\n\t"

       "addic.		%2, %2, -8	\n\t"
       "ble		two%=		\n\t"

       ".align	5		\n"
     "one%=:				\n\t"

       "xvmuldp		40, 32, 36	\n\t"	// c * x
       "xvmuldp		41, 33, 36	\n\t"
       "xvmuldp		42, 34, 36	\n\t"
       "xvmuldp		43, 35, 36	\n\t"

       "xvmuldp		%x5, 48, 36	\n\t"	// c * y
       "xvmuldp		%x6, 49, 36	\n\t"
       "xvmuldp		%x7, 50, 36	\n\t"
       "xvmuldp		%x8, 51, 36	\n\t"

       "xvmuldp		44, 32, 37	\n\t"	// s * x
       "xvmuldp		45, 33, 37	\n\t"

       "lxvd2x		32, 0, %3	\n\t"	// load x
       "lxvd2x		33, %15, %3	\n\t"

       "xvmuldp		46, 34, 37	\n\t"
       "xvmuldp		47, 35, 37	\n\t"

       "lxvd2x		34, %16, %3	\n\t"
       "lxvd2x		35, %17, %3	\n\t"

       "xvmuldp		%x9, 48, 37	\n\t"	// s * y
       "xvmuldp		%x10, 49, 37	\n\t"

       "lxvd2x		48, 0, %4	\n\t"	// load y
       "lxvd2x		49, %15, %4	\n\t"

       "xvmuldp		%x11, 50, 37	\n\t"
       "xvmuldp		%x12, 51, 37	\n\t"

       "lxvd2x		50, %16, %4	\n\t"
       "lxvd2x		51, %17, %4	\n\t"

       "xvadddp		40, 40, %x9	\n\t"	// c * x + s * y
       "xvadddp		41, 41, %x10	\n\t"	// c * x + s * y

       "addi		%3, %3, -64	\n\t"
       "addi		%4, %4, -64	\n\t"

       "xvadddp		42, 42, %x11	\n\t"	// c * x + s * y
       "xvadddp		43, 43, %x12	\n\t"	// c * x + s * y

       "xvsubdp		%x5, %x5, 44	\n\t"	// c * y - s * x
       "xvsubdp		%x6, %x6, 45	\n\t"	// c * y - s * x
       "xvsubdp		%x7, %x7, 46	\n\t"	// c * y - s * x
       "xvsubdp		%x8, %x8, 47	\n\t"	// c * y - s * x

       "stxvd2x		40, 0, %3	\n\t"	// store x
       "stxvd2x		41, %15, %3	\n\t"
       "stxvd2x		42, %16, %3	\n\t"
       "stxvd2x		43, %17, %3	\n\t"

       "stxvd2x		%x5, 0, %4	\n\t"	// store y
       "stxvd2x		%x6, %15, %4	\n\t"
       "stxvd2x		%x7, %16, %4	\n\t"
       "stxvd2x		%x8, %17, %4	\n\t"

       "addi		%3, %3, 128	\n\t"
       "addi		%4, %4, 128	\n\t"

       "addic.		%2, %2, -8	\n\t"
       "bgt		one%=		\n"

     "two%=:				\n\t"

       "xvmuldp		40, 32, 36	\n\t"	// c * x
       "xvmuldp		41, 33, 36	\n\t"
       "xvmuldp		42, 34, 36	\n\t"
       "xvmuldp		43, 35, 36	\n\t"

       "xvmuldp		%x5, 48, 36	\n\t"	// c * y
       "xvmuldp		%x6, 49, 36	\n\t"
       "xvmuldp		%x7, 50, 36	\n\t"
       "xvmuldp		%x8, 51, 36	\n\t"

       "xvmuldp		44, 32, 37	\n\t"	// s * x
       "xvmuldp		45, 33, 37	\n\t"
       "xvmuldp		46, 34, 37	\n\t"
       "xvmuldp		47, 35, 37	\n\t"

       "xvmuldp		%x9, 48, 37	\n\t"	// s * y
       "xvmuldp		%x10, 49, 37	\n\t"
       "xvmuldp		%x11, 50, 37	\n\t"
       "xvmuldp		%x12, 51, 37	\n\t"

       "addi		%3, %3, -64	\n\t"
       "addi		%4, %4, -64	\n\t"

       "xvadddp		40, 40, %x9	\n\t"	// c * x + s * y
       "xvadddp		41, 41, %x10	\n\t"	// c * x + s * y
       "xvadddp		42, 42, %x11	\n\t"	// c * x + s * y
       "xvadddp		43, 43, %x12	\n\t"	// c * x + s * y

       "xvsubdp		%x5, %x5, 44	\n\t"	// c * y - s * x
       "xvsubdp		%x6, %x6, 45	\n\t"	// c * y - s * x
       "xvsubdp		%x7, %x7, 46	\n\t"	// c * y - s * x
       "xvsubdp		%x8, %x8, 47	\n\t"	// c * y - s * x

       "stxvd2x		40, 0, %3	\n\t"	// store x
       "stxvd2x		41, %15, %3	\n\t"
       "stxvd2x		42, %16, %3	\n\t"
       "stxvd2x		43, %17, %3	\n\t"

       "stxvd2x		%x5, 0, %4	\n\t"	// store y
       "stxvd2x		%x6, %15, %4	\n\t"
       "stxvd2x		%x7, %16, %4	\n\t"
       "stxvd2x		%x8, %17, %4	\n"

     "#n=%2 x=%0=%3 y=%1=%4 c=%13 s=%14 o16=%15 o32=%16 o48=%17\n"
     "#t0=%x5 t1=%x6 t2=%x7 t3=%x8 t4=%x9 t5=%x10 t6=%x11 t7=%x12"
     :
       "+m" (*x),
       "+m" (*y),
       "+r" (n),	// 2
       "+b" (x),	// 3
       "+b" (y),	// 4
       "=wa" (t0),	// 5
       "=wa" (t1),	// 6
       "=wa" (t2),	// 7
       "=wa" (t3),	// 8
       "=wa" (t4),	// 9
       "=wa" (t5),	// 10
       "=wa" (t6),	// 11
       "=wa" (t7)	// 12
     :
       "d" (c),		// 13
       "d" (s),		// 14
       "b" (16),	// 15
       "b" (32),	// 16
       "b" (48)		// 17
     :
       "cr0",
       "vs32","vs33","vs34","vs35","vs36","vs37",
       "vs40","vs41","vs42","vs43","vs44","vs45","vs46","vs47",
       "vs48","vs49","vs50","vs51"
     );
}