// Copyright 2022 Google LLC // // This source code is licensed under the BSD-style license found in the // LICENSE file in the root directory of this source tree. #include # void xnn_f16_igemm_minmax_ukernel_4x16__aarch64_neonfp16arith_ld32( # size_t mr, x0 # size_t nc, x1 # size_t kc, x2 / x0 # size_t ks, x3 / x9 # const void**restrict a, x4 # const void*restrict w, x5 # void*restrict c, x6 # size_t cm_stride, x7 # size_t cn_stride, [sp] -> x10 # size_t a_offset, [sp + 8] -> x11 # const void* zero, [sp + 16] -> x12 # const xnn_f16_minmax_params params [sp + 24] -> (x8) # d8-d15, x19-x30 need to be preserved if used. x18 is reserved by the OS. # Register usage # A0 x8 v0 # A1 x13 v1 # A2 x14 v2 # A3 x15 v3 # B x5 v20 v21 v22 v23 # C0 x6 v24 v25 # C1 x16 v26 v27 # C2 x17 v28 v29 # C3 x7 v30 v31 # Clamp v4, v5 BEGIN_FUNCTION xnn_f16_igemm_minmax_ukernel_4x16__aarch64_neonfp16arith_ld32 # Load cn_stride, a_offset LDP x10, x11, [sp] # Load zero, params pointer LDP x12, x8, [sp, 16] # Load params values LD2R {v4.8h, v5.8h}, [x8] # Clamp C pointers CMP x0, 2 // if mr < 2 ADD x16, x6, x7 // c1 = c0 + cm_stride CSEL x16, x6, x16, LO // c1 = c0 ADD x17, x16, x7 // c2 = c1 + cm_stride // if mr <= 2 CSEL x17, x16, x17, LS // c2 = c1 CMP x0, 4 // if mr < 4 ADD x7, x17, x7 // c3 = c2 + cm_stride CSEL x7, x17, x7, LO // c3 = c2 0: # Load initial bias from w into accumulators LDR q24, [x5], 16 LDR q25, [x5], 16 MOV v26.16b, v24.16b MOV v28.16b, v24.16b MOV v30.16b, v24.16b MOV v27.16b, v25.16b MOV v29.16b, v25.16b MOV v31.16b, v25.16b MOV x9, x3 // p = ks 1: # Load next 4 A pointers LDP x8, x13, [x4], 16 LDP x14, x15, [x4], 16 CMP x8, x12 // if a0 == zero ADD x8, x8, x11 // a0 += a_offset CSEL x8, x12, x8, EQ // a0 = zero, else += a0 + a_offset CMP x13, x12 // if a1 == zero ADD x13, x13, x11 // a1 += a_offset CSEL x13, x12, x13, EQ // a1 = zero, else += a1 + a_offset CMP x14, x12 // if a2 == zero ADD x14, x14, x11 // a2 += a_offset CSEL x14, x12, x14, EQ // a2 = zero, else += a2 + a_offset CMP x15, x12 // if a3 == zero ADD x15, x15, x11 // a3 += a_offset CSEL x15, x12, x15, EQ // a3 = zero, else += a3 + a_offset # Is there at least 2 halffloats (4 bytes)? SUBS x0, x2, 4 // k = kc - 4 B.LO 4f .p2align 3 # Main loop - 2 halffloats of A (4 bytes) 2: LDR s0, [x8], 4 LDR q20, [x5], 16 LDR q21, [x5], 16 LDR s1, [x13], 4 LDR s2, [x14], 4 LDR s3, [x15], 4 LDR q22, [x5], 16 LDR q23, [x5], 16 SUBS x0, x0, 4 FMLA v24.8h, v20.8h, v0.h[0] FMLA v25.8h, v21.8h, v0.h[0] FMLA v26.8h, v20.8h, v1.h[0] FMLA v27.8h, v21.8h, v1.h[0] FMLA v28.8h, v20.8h, v2.h[0] FMLA v29.8h, v21.8h, v2.h[0] FMLA v30.8h, v20.8h, v3.h[0] FMLA v31.8h, v21.8h, v3.h[0] FMLA v24.8h, v22.8h, v0.h[1] FMLA v25.8h, v23.8h, v0.h[1] FMLA v26.8h, v22.8h, v1.h[1] FMLA v27.8h, v23.8h, v1.h[1] FMLA v28.8h, v22.8h, v2.h[1] FMLA v29.8h, v23.8h, v2.h[1] FMLA v30.8h, v22.8h, v3.h[1] FMLA v31.8h, v23.8h, v3.h[1] B.HS 2b # Is there a remainder?- 1 halffloat of A (2 bytes) TBNZ x0, 1, 4f 3: # ks loop SUBS x9, x9, 32 // ks -= MR * sizeof(void*) B.HI 1b # Clamp FMAX v24.8h, v24.8h, v4.8h FMAX v25.8h, v25.8h, v4.8h FMAX v26.8h, v26.8h, v4.8h FMAX v27.8h, v27.8h, v4.8h FMAX v28.8h, v28.8h, v4.8h FMAX v29.8h, v29.8h, v4.8h FMAX v30.8h, v30.8h, v4.8h FMAX v31.8h, v31.8h, v4.8h FMIN v24.8h, v24.8h, v5.8h FMIN v25.8h, v25.8h, v5.8h FMIN v26.8h, v26.8h, v5.8h FMIN v27.8h, v27.8h, v5.8h FMIN v28.8h, v28.8h, v5.8h FMIN v29.8h, v29.8h, v5.8h FMIN v30.8h, v30.8h, v5.8h FMIN v31.8h, v31.8h, v5.8h # Store full 4 x 16 SUBS x1, x1, 16 B.LO 5f STP q30, q31, [x7] ADD x7, x7, x10 STP q28, q29, [x17] ADD x17, x17, x10 STP q26, q27, [x16] ADD x16, x16, x10 STP q24, q25, [x6] ADD x6, x6, x10 SUB x4, x4, x3 // a -= ks # nc loop B.HI 0b RET # Remainder- 1 halffloat of A 4: LDR h0, [x8], 2 LDR q20, [x5], 16 LDR q21, [x5], 16 LDR h1, [x13], 2 LDR h2, [x14], 2 LDR h3, [x15], 2 FMLA v24.8h, v20.8h, v0.h[0] FMLA v25.8h, v21.8h, v0.h[0] FMLA v26.8h, v20.8h, v1.h[0] FMLA v27.8h, v21.8h, v1.h[0] FMLA v28.8h, v20.8h, v2.h[0] FMLA v29.8h, v21.8h, v2.h[0] FMLA v30.8h, v20.8h, v3.h[0] FMLA v31.8h, v21.8h, v3.h[0] B 3b # Store odd width 5: TBZ x1, 3, 6f STR q30, [x7], 16 MOV v30.16b, v31.16b STR q28, [x17], 16 MOV v28.16b, v29.16b STR q26, [x16], 16 MOV v26.16b, v27.16b STR q24, [x6], 16 MOV v24.16b, v25.16b 6: TBZ x1, 2, 7f STR d30, [x7], 8 STR d28, [x17], 8 DUP d30, v30.d[1] DUP d28, v28.d[1] STR d26, [x16], 8 STR d24, [x6], 8 DUP d26, v26.d[1] DUP d24, v24.d[1] 7: TBZ x1, 1, 8f STR s30, [x7], 4 STR s28, [x17], 4 DUP s30, v30.s[1] DUP s28, v28.s[1] STR s26, [x16], 4 STR s24, [x6], 4 DUP s26, v26.s[1] DUP s24, v24.s[1] 8: TBZ x1, 0, 9f STR h30, [x7] STR h28, [x17] STR h26, [x16] STR h24, [x6] 9: RET END_FUNCTION xnn_f16_igemm_minmax_ukernel_4x16__aarch64_neonfp16arith_ld32 #ifdef __ELF__ .section ".note.GNU-stack","",%progbits #endif