OpenBLAS/kernel/x86_64/cgemm3m_kernel_8x4_haswell.c

/* %0 = "+r"(a_pointer), %1 = "+r"(b_pointer), %2 = "+r"(c_pointer), %3 = "+r"(ldc_in_bytes), %4 for k_count, %5 for c_store */
/* r12 = k << 4(const), r13 = k(const), r14 = b_head_pos(const), r15 = tmp */

#include "common.h"
#include <stdint.h>

//recommended settings: GEMM_P = 320, GEMM_Q = 320.

/* m = 8 *//* ymm0 for alpha, ymm1-ymm3 for temporary use, ymm4-ymm15 for accumulators */
#define KERNEL_k1m8n1 \
    "vmovups (%0),%%ymm1; addq $32,%0;"\
    "vbroadcastss (%1),%%ymm2; vfmadd231ps %%ymm1,%%ymm2,%%ymm4;"\
    "addq $4,%1;"
#define KERNEL_h_k1m8n2 \
    "vmovsldup (%0),%%ymm1; vmovshdup (%0),%%ymm2; addq $32,%0;"\
    "vbroadcastsd (%1),%%ymm3; vfmadd231ps %%ymm1,%%ymm3,%%ymm4; vfmadd231ps %%ymm2,%%ymm3,%%ymm5;"
#define KERNEL_k1m8n2 KERNEL_h_k1m8n2 "addq $8,%1;"
#define KERNEL_h_k1m8n4 \
    KERNEL_h_k1m8n2 "vbroadcastsd 8(%1),%%ymm3; vfmadd231ps %%ymm1,%%ymm3,%%ymm6; vfmadd231ps %%ymm2,%%ymm3,%%ymm7;"
#define KERNEL_k1m8n4 KERNEL_h_k1m8n4 "addq $16,%1;"
#define unit_kernel_k1m8n4(c1,c2,c3,c4,...) \
    "vbroadcastsd  ("#__VA_ARGS__"),%%ymm3; vfmadd231ps %%ymm1,%%ymm3,"#c1"; vfmadd231ps %%ymm2,%%ymm3,"#c2";"\
    "vbroadcastsd 8("#__VA_ARGS__"),%%ymm3; vfmadd231ps %%ymm1,%%ymm3,"#c3"; vfmadd231ps %%ymm2,%%ymm3,"#c4";"
#define KERNEL_h_k1m8n8 KERNEL_h_k1m8n4 unit_kernel_k1m8n4(%%ymm8,%%ymm9,%%ymm10,%%ymm11,%1,%%r12,1)
#define KERNEL_k1m8n8 KERNEL_h_k1m8n8 "addq $16,%1;"
#define KERNEL_h_k1m8n12 KERNEL_h_k1m8n8 unit_kernel_k1m8n4(%%ymm12,%%ymm13,%%ymm14,%%ymm15,%1,%%r12,2)
#define KERNEL_k1m8n12 KERNEL_h_k1m8n12 "addq $16,%1;"
#define INIT_m8n1 "vpxor %%ymm4,%%ymm4,%%ymm4;"
#define INIT_m8n2 INIT_m8n1 "vpxor %%ymm5,%%ymm5,%%ymm5;"
#define INIT_m8n4 INIT_m8n2 "vpxor %%ymm6,%%ymm6,%%ymm6;vpxor %%ymm7,%%ymm7,%%ymm7;"
#define unit_init_m8n4(c1,c2,c3,c4) \
    "vpxor "#c1","#c1","#c1";vpxor "#c2","#c2","#c2";vpxor "#c3","#c3","#c3";vpxor "#c4","#c4","#c4";"
#define INIT_m8n8  INIT_m8n4 unit_init_m8n4(%%ymm8,%%ymm9,%%ymm10,%%ymm11)
#define INIT_m8n12 INIT_m8n8 unit_init_m8n4(%%ymm12,%%ymm13,%%ymm14,%%ymm15)
#define SAVE_m8n1 \
    "vunpcklps %%ymm4,%%ymm4,%%ymm2; vunpckhps %%ymm4,%%ymm4,%%ymm3;"\
    "vperm2f128 $2,%%ymm2,%%ymm3,%%ymm1; vperm2f128 $19,%%ymm2,%%ymm3,%%ymm2;"\
    "vfmadd213ps (%2),%%ymm0,%%ymm1; vfmadd213ps 32(%2),%%ymm0,%%ymm2; vmovups %%ymm1,(%2); vmovups %%ymm2,32(%2);"
#define unit_save_m8n2(c1,c2) \
    "vunpcklpd "#c2","#c1",%%ymm2; vunpckhpd "#c2","#c1",%%ymm3;"\
    "vperm2f128 $2,%%ymm2,%%ymm3,"#c1"; vperm2f128 $19,%%ymm2,%%ymm3,"#c2";"\
    "vmovsldup "#c1",%%ymm2; vmovsldup "#c2",%%ymm3;"\
    "vfmadd213ps (%5),%%ymm0,%%ymm2; vfmadd213ps 32(%5),%%ymm0,%%ymm3; vmovups %%ymm2,(%5); vmovups %%ymm3,32(%5);"\
    "vmovshdup "#c1",%%ymm2; vmovshdup "#c2",%%ymm3;"\
    "vfmadd213ps (%5,%3,1),%%ymm0,%%ymm2; vfmadd213ps 32(%5,%3,1),%%ymm0,%%ymm3; vmovups %%ymm2,(%5,%3,1); vmovups %%ymm3,32(%5,%3,1);"\
    "leaq (%5,%3,2),%5;"
#define SAVE_m8n2 "movq %2,%5;" unit_save_m8n2(%%ymm4,%%ymm5)
#define SAVE_m8n4  SAVE_m8n2  unit_save_m8n2(%%ymm6,%%ymm7)
#define SAVE_m8n8  SAVE_m8n4  unit_save_m8n2(%%ymm8,%%ymm9)   unit_save_m8n2(%%ymm10,%%ymm11)
#define SAVE_m8n12 SAVE_m8n8  unit_save_m8n2(%%ymm12,%%ymm13) unit_save_m8n2(%%ymm14,%%ymm15)
#define COMPUTE_m8(ndim) \
    INIT_m8n##ndim\
    "movq %%r13,%4; movq %%r14,%1; movq %2,%5; xorq %%r15,%%r15;"\
    "cmpq $24,%4; jb "#ndim"882f;"\
    #ndim"881:\n\t"\
    "cmpq $126,%%r15; movq $126,%%r15; cmoveq %3,%%r15;"\
    "prefetcht0 64(%1); prefetcht0 64(%1,%%r12,1); prefetcht0 64(%1,%%r12,2);"\
    "prefetcht0 512(%0);" KERNEL_k1m8n##ndim KERNEL_k1m8n##ndim\
    "prefetcht0 512(%0);" KERNEL_k1m8n##ndim KERNEL_k1m8n##ndim\
    "prefetcht1 (%5); leaq -63(%5,%%r15,1),%5;"\
    "prefetcht0 64(%1); prefetcht0 64(%1,%%r12,1); prefetcht0 64(%1,%%r12,2);"\
    "prefetcht0 512(%0);" KERNEL_k1m8n##ndim KERNEL_k1m8n##ndim\
    "prefetcht0 512(%0);" KERNEL_k1m8n##ndim KERNEL_k1m8n##ndim\
    "prefetcht1 (%8); addq $16,%8;"\
    "subq $8,%4; cmpq $24,%4; jnb "#ndim"881b;"\
    "movq %2,%5;"\
    #ndim"882:\n\t"\
    "testq %4,%4; jz "#ndim"883f;"\
    "prefetcht0 (%5); prefetcht0 63(%5); addq %3,%5;"\
    KERNEL_k1m8n##ndim\
    "decq %4; jmp "#ndim"882b;"\
    #ndim"883:\n\t"\
    "prefetcht0 (%%r14); prefetcht0 64(%%r14);"\
    SAVE_m8n##ndim "addq $64,%2;"

/* m = 4 *//* xmm0 for alpha, xmm1-xmm3 for temporary use, xmm4-xmm15 for accumulators */
#define KERNEL_k1m4n1 \
    "vmovups (%0),%%xmm1; addq $16,%0;"\
    "vbroadcastss (%1),%%xmm2; vfmadd231ps %%xmm1,%%xmm2,%%xmm4;"\
    "addq $4,%1;"
#define KERNEL_h_k1m4n2 \
    "vmovsldup (%0),%%xmm1; vmovshdup (%0),%%xmm2; addq $16,%0;"\
    "vmovddup (%1),%%xmm3; vfmadd231ps %%xmm1,%%xmm3,%%xmm4; vfmadd231ps %%xmm2,%%xmm3,%%xmm5;"
#define KERNEL_k1m4n2 KERNEL_h_k1m4n2 "addq $8,%1;"
#define KERNEL_h_k1m4n4 \
    KERNEL_h_k1m4n2 "vmovddup 8(%1),%%xmm3; vfmadd231ps %%xmm1,%%xmm3,%%xmm6; vfmadd231ps %%xmm2,%%xmm3,%%xmm7;"
#define KERNEL_k1m4n4 KERNEL_h_k1m4n4 "addq $16,%1;"
#define unit_kernel_k1m4n4(c1,c2,c3,c4,...) \
    "vmovddup  ("#__VA_ARGS__"),%%xmm3; vfmadd231ps %%xmm1,%%xmm3,"#c1"; vfmadd231ps %%xmm2,%%xmm3,"#c2";"\
    "vmovddup 8("#__VA_ARGS__"),%%xmm3; vfmadd231ps %%xmm1,%%xmm3,"#c3"; vfmadd231ps %%xmm2,%%xmm3,"#c4";"
#define KERNEL_h_k1m4n8 KERNEL_h_k1m4n4 unit_kernel_k1m4n4(%%xmm8,%%xmm9,%%xmm10,%%xmm11,%1,%%r12,1)
#define KERNEL_k1m4n8 KERNEL_h_k1m4n8 "addq $16,%1;"
#define KERNEL_h_k1m4n12 KERNEL_h_k1m4n8 unit_kernel_k1m4n4(%%xmm12,%%xmm13,%%xmm14,%%xmm15,%1,%%r12,2)
#define KERNEL_k1m4n12 KERNEL_h_k1m4n12 "addq $16,%1;"
#define INIT_m4n1 "vpxor %%xmm4,%%xmm4,%%xmm4;"
#define INIT_m4n2 INIT_m4n1 "vpxor %%xmm5,%%xmm5,%%xmm5;"
#define INIT_m4n4 INIT_m4n2 "vpxor %%xmm6,%%xmm6,%%xmm6;vpxor %%xmm7,%%xmm7,%%xmm7;"
#define unit_init_m4n4(c1,c2,c3,c4) \
    "vpxor "#c1","#c1","#c1";vpxor "#c2","#c2","#c2";vpxor "#c3","#c3","#c3";vpxor "#c4","#c4","#c4";"
#define INIT_m4n8  INIT_m4n4 unit_init_m4n4(%%xmm8,%%xmm9,%%xmm10,%%xmm11)
#define INIT_m4n12 INIT_m4n8 unit_init_m4n4(%%xmm12,%%xmm13,%%xmm14,%%xmm15)
#define SAVE_m4n1 \
    "vunpcklps %%xmm4,%%xmm4,%%xmm2; vunpckhps %%xmm4,%%xmm4,%%xmm3;"\
    "vfmadd213ps (%2),%%xmm0,%%xmm2; vfmadd213ps 16(%2),%%xmm0,%%xmm3; vmovups %%xmm2,(%2); vmovups %%xmm3,16(%2);"
#define unit_save_m4n2(c1,c2) \
    "vunpcklpd "#c2","#c1",%%xmm2; vunpckhpd "#c2","#c1","#c2"; vmovapd %%xmm2,"#c1";"\
    "vmovsldup "#c1",%%xmm2; vmovsldup "#c2",%%xmm3;"\
    "vfmadd213ps (%5),%%xmm0,%%xmm2; vfmadd213ps 16(%5),%%xmm0,%%xmm3; vmovups %%xmm2,(%5); vmovups %%xmm3,16(%5);"\
    "vmovshdup "#c1",%%xmm2; vmovshdup "#c2",%%xmm3;"\
    "vfmadd213ps (%5,%3,1),%%xmm0,%%xmm2; vfmadd213ps 16(%5,%3,1),%%xmm0,%%xmm3; vmovups %%xmm2,(%5,%3,1); vmovups %%xmm3,16(%5,%3,1);"\
    "leaq (%5,%3,2),%5;"
#define SAVE_m4n2 "movq %2,%5;" unit_save_m4n2(%%xmm4,%%xmm5)
#define SAVE_m4n4  SAVE_m4n2  unit_save_m4n2(%%xmm6,%%xmm7)
#define SAVE_m4n8  SAVE_m4n4  unit_save_m4n2(%%xmm8,%%xmm9)   unit_save_m4n2(%%xmm10,%%xmm11)
#define SAVE_m4n12 SAVE_m4n8  unit_save_m4n2(%%xmm12,%%xmm13) unit_save_m4n2(%%xmm14,%%xmm15)
#define COMPUTE_m4(ndim) \
    INIT_m4n##ndim\
    "movq %%r13,%4; movq %%r14,%1;"\
    #ndim"442:\n\t"\
    "testq %4,%4; jz "#ndim"443f;"\
    KERNEL_k1m4n##ndim\
    "decq %4; jmp "#ndim"442b;"\
    #ndim"443:\n\t"\
    SAVE_m4n##ndim "addq $32,%2;"

/* m = 2 *//* xmm0 for alpha, xmm1-xmm3 and xmm10 for temporary use, xmm4-xmm9 for accumulators */
#define INIT_m2n1 "vpxor %%xmm4,%%xmm4,%%xmm4;"
#define KERNEL_k1m2n1 \
    "vmovsd (%0),%%xmm1; addq $8,%0;"\
    "vbroadcastss (%1),%%xmm2; vfmadd231ps %%xmm1,%%xmm2,%%xmm4;"\
    "addq $4,%1;"
#define SAVE_m2n1 \
    "vunpcklps %%xmm4,%%xmm4,%%xmm1; vfmadd213ps (%2),%%xmm0,%%xmm1; vmovups %%xmm1,(%2);"
#define INIT_m2n2 INIT_m2n1 "vpxor %%xmm5,%%xmm5,%%xmm5;"
#define KERNEL_k1m2n2 \
    "vmovsd (%0),%%xmm1; addq $8,%0;"\
    "vbroadcastss  (%1),%%xmm2; vfmadd231ps %%xmm1,%%xmm2,%%xmm4;"\
    "vbroadcastss 4(%1),%%xmm3; vfmadd231ps %%xmm1,%%xmm3,%%xmm5;"\
    "addq $8,%1;"
#define SAVE_m2n2 SAVE_m2n1 \
    "vunpcklps %%xmm5,%%xmm5,%%xmm1; vfmadd213ps (%2,%3,1),%%xmm0,%%xmm1; vmovups %%xmm1,(%2,%3,1);"
#define INIT_m2n4  INIT_m2n2
#define INIT_m2n8  INIT_m2n4 "vpxor %%xmm6,%%xmm6,%%xmm6; vpxor %%xmm7,%%xmm7,%%xmm7;"
#define INIT_m2n12 INIT_m2n8 "vpxor %%xmm8,%%xmm8,%%xmm8; vpxor %%xmm9,%%xmm9,%%xmm9;"
#define KERNEL_k1m2n4 \
    "vmovups (%1),%%xmm3; addq $16,%1;"\
    "vbroadcastss  (%0),%%xmm1; vfmadd231ps %%xmm3,%%xmm1,%%xmm4;"\
    "vbroadcastss 4(%0),%%xmm2; vfmadd231ps %%xmm3,%%xmm2,%%xmm5;"\
    "addq $8,%0;"
#define KERNEL_k1m2n8 \
    "vmovups (%1),%%xmm3; vmovups (%1,%%r12,1),%%xmm2; addq $16,%1;"\
    "vbroadcastss  (%0),%%xmm1; vfmadd231ps %%xmm3,%%xmm1,%%xmm4; vfmadd231ps %%xmm2,%%xmm1,%%xmm6;"\
    "vbroadcastss 4(%0),%%xmm1; vfmadd231ps %%xmm3,%%xmm1,%%xmm5; vfmadd231ps %%xmm2,%%xmm1,%%xmm7;"\
    "addq $8,%0;"
#define KERNEL_k1m2n12 \
    "vmovups (%1),%%xmm3; vmovups (%1,%%r12,1),%%xmm2; vmovups (%1,%%r12,2),%%xmm1; addq $16,%1;"\
    "vbroadcastss  (%0),%%xmm10; vfmadd231ps %%xmm3,%%xmm10,%%xmm4; vfmadd231ps %%xmm2,%%xmm10,%%xmm6; vfmadd231ps %%xmm1,%%xmm10,%%xmm8;"\
    "vbroadcastss 4(%0),%%xmm10; vfmadd231ps %%xmm3,%%xmm10,%%xmm5; vfmadd231ps %%xmm2,%%xmm10,%%xmm7; vfmadd231ps %%xmm1,%%xmm10,%%xmm9;"\
    "addq $8,%0;"
#define unit_save_m2n4(c1,c2) \
    "vunpcklpd "#c2","#c1",%%xmm1; vunpckhpd "#c2","#c1",%%xmm2;"\
    "vmovsldup %%xmm1,%%xmm3; vfmadd213ps (%5),%%xmm0,%%xmm3; vmovups %%xmm3,(%5);"\
    "vmovshdup %%xmm1,%%xmm3; vfmadd213ps (%5,%3,1),%%xmm0,%%xmm3; vmovups %%xmm3,(%5,%3,1);"\
    "leaq (%5,%3,2),%5;"\
    "vmovsldup %%xmm2,%%xmm3; vfmadd213ps (%5),%%xmm0,%%xmm3; vmovups %%xmm3,(%5);"\
    "vmovshdup %%xmm2,%%xmm3; vfmadd213ps (%5,%3,1),%%xmm0,%%xmm3; vmovups %%xmm3,(%5,%3,1);"\
    "leaq (%5,%3,2),%5;"
#define SAVE_m2n4 "movq %2,%5;" unit_save_m2n4(%%xmm4,%%xmm5)
#define SAVE_m2n8   SAVE_m2n4   unit_save_m2n4(%%xmm6,%%xmm7)
#define SAVE_m2n12  SAVE_m2n8   unit_save_m2n4(%%xmm8,%%xmm9)
#define COMPUTE_m2(ndim) \
    INIT_m2n##ndim\
    "movq %%r13,%4; movq %%r14,%1;"\
    #ndim"222:\n\t"\
    "testq %4,%4; jz "#ndim"223f;"\
    KERNEL_k1m2n##ndim\
    "decq %4; jmp "#ndim"222b;"\
    #ndim"223:\n\t"\
    SAVE_m2n##ndim "addq $16,%2;"

/* m = 1 *//* xmm0 for alpha, xmm1-xmm3 and xmm10 for temporary use, xmm4-xmm6 for accumulators */
#define INIT_m1n1 "vpxor %%xmm4,%%xmm4,%%xmm4;"
#define KERNEL_k1m1n1 \
    "vmovss (%1),%%xmm3; addq $4,%1;"\
    "vmovss (%0),%%xmm1; vfmadd231ss %%xmm3,%%xmm1,%%xmm4;"\
    "addq $4,%0;"
#define SAVE_m1n1 \
    "vunpcklps %%xmm4,%%xmm4,%%xmm4; vmovsd (%2),%%xmm1; vfmadd213ps %%xmm1,%%xmm0,%%xmm4; vmovsd %%xmm4,(%2);"
#define INIT_m1n2 INIT_m1n1
#define KERNEL_k1m1n2 \
    "vmovsd (%1),%%xmm3; addq $8,%1;"\
    "vbroadcastss  (%0),%%xmm1; vfmadd231ps %%xmm3,%%xmm1,%%xmm4;"\
    "addq $4,%0;"
#define SAVE_m1n2 \
    "vunpcklps %%xmm4,%%xmm4,%%xmm4; vmovsd (%2),%%xmm3; vmovhpd (%2,%3,1),%%xmm3,%%xmm3; vfmadd213ps %%xmm3,%%xmm0,%%xmm4;"\
    "vmovsd %%xmm4,(%2); vmovhpd %%xmm4,(%2,%3,1);"
#define INIT_m1n4  INIT_m1n2
#define INIT_m1n8  INIT_m1n4 "vpxor %%xmm5,%%xmm5,%%xmm5;"
#define INIT_m1n12 INIT_m1n8 "vpxor %%xmm6,%%xmm6,%%xmm6;"
#define KERNEL_k1m1n4 \
    "vmovups (%1),%%xmm3; addq $16,%1;"\
    "vbroadcastss  (%0),%%xmm1; vfmadd231ps %%xmm3,%%xmm1,%%xmm4;"\
    "addq $4,%0;"
#define KERNEL_k1m1n8 \
    "vmovups (%1),%%xmm3; vmovups (%1,%%r12,1),%%xmm2; addq $16,%1;"\
    "vbroadcastss  (%0),%%xmm1; vfmadd231ps %%xmm3,%%xmm1,%%xmm4; vfmadd231ps %%xmm2,%%xmm1,%%xmm5;"\
    "addq $4,%0;"
#define KERNEL_k1m1n12 \
    "vmovups (%1),%%xmm3; vmovups (%1,%%r12,1),%%xmm2; vmovups (%1,%%r12,2),%%xmm1; addq $16,%1;"\
    "vbroadcastss  (%0),%%xmm10; vfmadd231ps %%xmm3,%%xmm10,%%xmm4; vfmadd231ps %%xmm2,%%xmm10,%%xmm5; vfmadd231ps %%xmm1,%%xmm10,%%xmm6;"\
    "addq $4,%0;"
#define unit_save_m1n4(c1) \
    "vunpcklps "#c1","#c1",%%xmm1; vunpckhps "#c1","#c1",%%xmm2;"\
    "vmovsd (%5),%%xmm3; vmovhpd (%5,%3,1),%%xmm3,%%xmm3; vfmadd213ps %%xmm3,%%xmm0,%%xmm1;"\
    "vmovsd %%xmm1,(%5); vmovhpd %%xmm1,(%5,%3,1); leaq (%5,%3,2),%5;"\
    "vmovsd (%5),%%xmm3; vmovhpd (%5,%3,1),%%xmm3,%%xmm3; vfmadd213ps %%xmm3,%%xmm0,%%xmm2;"\
    "vmovsd %%xmm2,(%5); vmovhpd %%xmm2,(%5,%3,1); leaq (%5,%3,2),%5;"
#define SAVE_m1n4 "movq %2,%5;" unit_save_m1n4(%%xmm4)
#define SAVE_m1n8  SAVE_m1n4    unit_save_m1n4(%%xmm5)
#define SAVE_m1n12 SAVE_m1n8    unit_save_m1n4(%%xmm6)
#define COMPUTE_m1(ndim) \
    INIT_m1n##ndim\
    "movq %%r13,%4; movq %%r14,%1;"\
    #ndim"112:\n\t"\
    "testq %4,%4; jz "#ndim"113f;"\
    KERNEL_k1m1n##ndim\
    "decq %4; jmp "#ndim"112b;"\
    #ndim"113:\n\t"\
    SAVE_m1n##ndim "addq $8,%2;"

/* %0 = "+r"(a_pointer), %1 = "+r"(b_pointer), %2 = "+r"(c_pointer), %3 = "+r"(ldc_in_bytes), %4 = "+r"(K), %5 = "+r"(ctemp) */
/* %6 = "+r"(&alpha), %7 = "+r"(M), %8 = "+r"(next_b) */
/* r11 = m(const), r12 = k << 4(const), r13 = k(const), r14 = b_head_pos(const),r15 = tmp */

#define COMPUTE(ndim) {\
    next_b = b_pointer + ndim * K;\
    __asm__ __volatile__(\
    "vbroadcastsd (%6),%%ymm0;"\
    "movq %4,%%r13; movq %4,%%r12; salq $4,%%r12; movq %1,%%r14; movq %7,%%r11;"\
    "cmpq $8,%7;jb 33101"#ndim"f;"\
    "33109"#ndim":\n\t"\
    COMPUTE_m8(ndim)\
    "subq $8,%7;cmpq $8,%7;jnb 33109"#ndim"b;"\
    "33101"#ndim":\n\t"\
    "cmpq $4,%7;jb 33103"#ndim"f;"\
    COMPUTE_m4(ndim)\
    "subq $4,%7;"\
    "33103"#ndim":\n\t"\
    "cmpq $2,%7;jb 33104"#ndim"f;"\
    COMPUTE_m2(ndim)\
    "subq $2,%7;"\
    "33104"#ndim":\n\t"\
    "testq %7,%7;jz 33105"#ndim"f;"\
    COMPUTE_m1(ndim)\
    "33105"#ndim":\n\t"\
    "movq %%r13,%4; movq %%r14,%1; movq %%r11,%7;"\
    :"+r"(a_pointer),"+r"(b_pointer),"+r"(c_pointer),"+r"(ldc_in_bytes),"+r"(K),"+r"(ctemp),"+r"(const_val),"+r"(M),"+r"(next_b)\
    ::"r11","r12","r13","r14","r15",\
    "xmm0","xmm1","xmm2","xmm3","xmm4","xmm5","xmm6","xmm7","xmm8","xmm9","xmm10","xmm11","xmm12","xmm13","xmm14","xmm15","cc","memory");\
    a_pointer -= M * K; b_pointer += ndim * K; c_pointer += 2*(LDC * ndim - M);\
}

int __attribute__ ((noinline))
CNAME(BLASLONG m, BLASLONG n, BLASLONG k, float alphar, float alphai, float * __restrict__ A, float * __restrict__ B, float * __restrict__ C, BLASLONG LDC)
{
    if(m==0||n==0||k==0) return 0;
    int64_t ldc_in_bytes = (int64_t)LDC * sizeof(float) * 2;
    float constval[2]; constval[0] = alphar; constval[1] = alphai;
    float *const_val=constval;
    int64_t M = (int64_t)m, K = (int64_t)k;
    BLASLONG n_count = n;
    float *a_pointer = A,*b_pointer = B,*c_pointer = C,*ctemp = C,*next_b = B;
    for(;n_count>11;n_count-=12) COMPUTE(12)
    for(;n_count>7;n_count-=8) COMPUTE(8)
    for(;n_count>3;n_count-=4) COMPUTE(4)
    for(;n_count>1;n_count-=2) COMPUTE(2)
    if(n_count>0) COMPUTE(1)
    return 0;
}