// Copyright 2019 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_f32_gemm${"inc" if INC else ""}_minmax_ukernel_4x2__aarch64_neonfma${"_prfm" if PREFETCH else ""}_cortex_a75( # size_t mr, x0 # size_t nc, x1 # size_t kc, x2 / x0 # const uint8_t*restrict a, x3 # size_t a_stride, x4 # const void*restrict w, x5 # uint8_t*restrict c, x6 # size_t cm_stride, x7 # size_t cn_stride, [sp] -> x14 $if INC: # const float*restrict acc, [sp + 8] -> x15 # const union xnn_f32_minmax_params params[restrict XNN_MIN_ELEMENTS(1)]) [sp + 16] -> x8 $else: # const union xnn_f32_minmax_params params[restrict XNN_MIN_ELEMENTS(1)]) [sp + 8] -> x8 # d8-d15, x19-x30 need to be preserved if used. x18 is reserved by the OS. # Register usage # A0 x3 v0 v4 # A1 x11 v1 v5 # A2 x12 v2 v6 # A3 x4 v3 v7 # B x5 v16 v17 v18 v19 v20 v21 v22 v23 # C0 x6 v24 v25 # C1 x9 v26 v27 # C2 x10 v28 v29 # C3 x7 v30 v31 # Clamp v4 v5 BEGIN_FUNCTION xnn_f32_gemm${"inc" if INC else ""}_minmax_ukernel_4x2__aarch64_neonfma${"_prfm" if PREFETCH else ""}_cortex_a75 $if INC: # Load cn_stride, acc LDP x14, x15, [sp] # Load params pointer LDR x8, [sp, 16] $else: # Load cn_stride, params pointer LDP x14, x8, [sp] # Load min/max values LD2R {v4.2s, v5.2s}, [x8] # Clamp A and C pointers CMP x0, 2 // if mr < 2 ADD x11, x3, x4 // a1 = a0 + a_stride ADD x9, x6, x7 // c1 = c0 + cm_stride CSEL x11, x3, x11, LO // a1 = a0 CSEL x9, x6, x9, LO // c1 = c0 ADD x12, x11, x4 // a2 = a1 + a_stride ADD x10, x9, x7 // c2 = c1 + cm_stride // if mr <= 2 CSEL x12, x11, x12, LS // a2 = a1 CSEL x10, x9, x10, LS // c2 = c1 CMP x0, 4 // if mr < 4 ADD x4, x12, x4 // a3 = a2 + a_stride ADD x7, x10, x7 // c3 = c2 + cm_stride CSEL x4, x12, x4, LO // a3 = a2 CSEL x7, x10, x7, LO // c3 = c2 0: $if INC: # Load initial accumulators LDR d24, [x15], 8 LDR d26, [x15], 8 LDR d28, [x15], 8 LDR d30, [x15], 8 $else: # Load initial bias from w into accumulators LDR d24, [x5], 8 MOV v26.8b, v24.8b MOV v30.8b, v24.8b MOV v28.8b, v24.8b MOVI v25.2s, 0 $if PREFETCH: PRFM PLDL1KEEP, [x5, 64] MOVI v27.2s, 0 $if PREFETCH: PRFM PLDL1KEEP, [x5, 128] MOVI v29.2s, 0 $if PREFETCH: PRFM PLDL1KEEP, [x5, 192] MOVI v31.2s, 0 $if PREFETCH: PRFM PLDL1KEEP, [x5, 256] # Is there at least 8 floats (32 bytes) for prologue + epilogue? SUBS x0, x2, 32 // k = kc - 32 B.LO 4f # Prologue # Read first block of 4 A and B. LDR q0, [x3], 16 LDP d20, d21, [x5], 16 LDR q1, [x11], 16 LDR q2, [x12], 16 LDR q3, [x4], 16 LDP d22, d23, [x5], 16 # Is there at least 32. yes do main loop SUBS x0, x0, 32 B.LO 2f # Main loop - 8 floats of A (32 bytes) 1: # First block of 4. FMA for first 4, loads for 2nd block of 4. FMLA v24.2s, v20.2s, v0.s[0] LDR q4, [x3], 16 FMLA v26.2s, v20.2s, v1.s[0] FMLA v28.2s, v20.2s, v2.s[0] LDR d16, [x5, 0] FMLA v30.2s, v20.2s, v3.s[0] FMLA v25.2s, v21.2s, v0.s[1] LDR q5, [x11], 16 FMLA v27.2s, v21.2s, v1.s[1] FMLA v29.2s, v21.2s, v2.s[1] LDR q6, [x12], 16 FMLA v31.2s, v21.2s, v3.s[1] FMLA v24.2s, v22.2s, v0.s[2] LDR q7, [x4], 16 FMLA v26.2s, v22.2s, v1.s[2] FMLA v28.2s, v22.2s, v2.s[2] LDR d17, [x5, 8] FMLA v30.2s, v22.2s, v3.s[2] FMLA v25.2s, v23.2s, v0.s[3] LDR d18, [x5, 16] FMLA v27.2s, v23.2s, v1.s[3] FMLA v29.2s, v23.2s, v2.s[3] LDR d19, [x5, 24] FMLA v31.2s, v23.2s, v3.s[3] $if PREFETCH: PRFM PLDL1KEEP, [x5, 320] # Second block of 4. FMA for second 4, loads for 1st block of 4. FMLA v24.2s, v16.2s, v4.s[0] LDR q0, [x3], 16 FMLA v26.2s, v16.2s, v5.s[0] FMLA v28.2s, v16.2s, v6.s[0] LDR d20, [x5, 32] FMLA v30.2s, v16.2s, v7.s[0] FMLA v25.2s, v17.2s, v4.s[1] LDR q1, [x11], 16 FMLA v27.2s, v17.2s, v5.s[1] FMLA v29.2s, v17.2s, v6.s[1] LDR q2, [x12], 16 FMLA v31.2s, v17.2s, v7.s[1] FMLA v24.2s, v18.2s, v4.s[2] LDR q3, [x4], 16 FMLA v26.2s, v18.2s, v5.s[2] FMLA v28.2s, v18.2s, v6.s[2] LDR d21, [x5, 40] FMLA v30.2s, v18.2s, v7.s[2] SUBS x0, x0, 32 FMLA v25.2s, v19.2s, v4.s[3] LDR d22, [x5, 48] FMLA v27.2s, v19.2s, v5.s[3] LDR d23, [x5, 56] FMLA v29.2s, v19.2s, v6.s[3] ADD x5, x5, 64 FMLA v31.2s, v19.2s, v7.s[3] B.HS 1b 2: # Epilogue # First block of 4. FMA for first 4, loads for 2nd block of 4. FMLA v24.2s, v20.2s, v0.s[0] LDR q4, [x3], 16 FMLA v26.2s, v20.2s, v1.s[0] FMLA v28.2s, v20.2s, v2.s[0] LDR d16, [x5, 0] FMLA v30.2s, v20.2s, v3.s[0] FMLA v25.2s, v21.2s, v0.s[1] LDR q5, [x11], 16 FMLA v27.2s, v21.2s, v1.s[1] FMLA v29.2s, v21.2s, v2.s[1] LDR q6, [x12], 16 FMLA v31.2s, v21.2s, v3.s[1] FMLA v24.2s, v22.2s, v0.s[2] LDR q7, [x4], 16 FMLA v26.2s, v22.2s, v1.s[2] FMLA v28.2s, v22.2s, v2.s[2] LDR d17, [x5, 8] FMLA v30.2s, v22.2s, v3.s[2] FMLA v25.2s, v23.2s, v0.s[3] LDR d18, [x5, 16] FMLA v27.2s, v23.2s, v1.s[3] FMLA v29.2s, v23.2s, v2.s[3] LDR d19, [x5, 24] FMLA v31.2s, v23.2s, v3.s[3] $if PREFETCH: PRFM PLDL1KEEP, [x5, 320] # Second block of 4. FMA for second 4, no loads FMLA v24.2s, v16.2s, v4.s[0] FMLA v26.2s, v16.2s, v5.s[0] FMLA v28.2s, v16.2s, v6.s[0] FMLA v30.2s, v16.2s, v7.s[0] FMLA v25.2s, v17.2s, v4.s[1] FMLA v27.2s, v17.2s, v5.s[1] FMLA v29.2s, v17.2s, v6.s[1] FMLA v31.2s, v17.2s, v7.s[1] FMLA v24.2s, v18.2s, v4.s[2] FMLA v26.2s, v18.2s, v5.s[2] FMLA v28.2s, v18.2s, v6.s[2] ADDS x0, x0, 32 FMLA v30.2s, v18.2s, v7.s[2] FMLA v25.2s, v19.2s, v4.s[3] ADD x5, x5, 32 FMLA v27.2s, v19.2s, v5.s[3] FMLA v29.2s, v19.2s, v6.s[3] LD2R {v4.2s, v5.2s}, [x8] // Load min/max values FMLA v31.2s, v19.2s, v7.s[3] # Is there a remainder? up to 8 floats (32 bytes) B.NE 4f 3: FADD v24.2s, v24.2s, v25.2s FADD v26.2s, v26.2s, v27.2s FADD v28.2s, v28.2s, v29.2s FADD v30.2s, v30.2s, v31.2s # Clamp FMAX v24.2s, v24.2s, v4.2s FMAX v26.2s, v26.2s, v4.2s FMAX v28.2s, v28.2s, v4.2s FMAX v30.2s, v30.2s, v4.2s SUBS x1, x1, 2 FMIN v24.2s, v24.2s, v5.2s FMIN v26.2s, v26.2s, v5.2s FMIN v28.2s, v28.2s, v5.2s FMIN v30.2s, v30.2s, v5.2s # Store full 4 x 2 B.LO 7f $if INC: STR d30, [x7] SUB x3, x3, x2 // a0 -= kc ADD x7, x7, x14 STR d28, [x10] SUB x11, x11, x2 // a1 -= kc ADD x10, x10, x14 STR d26, [x9] SUB x12, x12, x2 // a2 -= kc ADD x9, x9, x14 STR d24, [x6] SUB x4, x4, x2 // a3 -= kc ADD x6, x6, x14 $else: STR d24, [x6] SUB x3, x3, x2 // a0 -= kc ADD x6, x6, x14 STR d26, [x9] SUB x11, x11, x2 // a1 -= kc ADD x9, x9, x14 STR d28, [x10] SUB x12, x12, x2 // a2 -= kc ADD x10, x10, x14 STR d30, [x7] SUB x4, x4, x2 // a3 -= kc ADD x7, x7, x14 B.HI 0b RET 4: # Remainder- 4 floats of A (16 bytes) TBZ x0, 4, 5f LDR q0, [x3], 16 LDP d20, d21, [x5], 16 LDR q1, [x11], 16 LDR q2, [x12], 16 LDR q3, [x4], 16 LDP d22, d23, [x5], 16 FMLA v24.2s, v20.2s, v0.s[0] FMLA v26.2s, v20.2s, v1.s[0] FMLA v28.2s, v20.2s, v2.s[0] FMLA v30.2s, v20.2s, v3.s[0] FMLA v25.2s, v21.2s, v0.s[1] FMLA v27.2s, v21.2s, v1.s[1] FMLA v29.2s, v21.2s, v2.s[1] FMLA v31.2s, v21.2s, v3.s[1] FMLA v24.2s, v22.2s, v0.s[2] FMLA v26.2s, v22.2s, v1.s[2] FMLA v28.2s, v22.2s, v2.s[2] FMLA v30.2s, v22.2s, v3.s[2] FMLA v25.2s, v23.2s, v0.s[3] FMLA v27.2s, v23.2s, v1.s[3] FMLA v29.2s, v23.2s, v2.s[3] FMLA v31.2s, v23.2s, v3.s[3] 5: # Remainder- 2 floats of A (8 bytes) TBZ x0, 3, 6f LDR d0, [x3], 8 LDP d20, d21, [x5], 16 LDR d1, [x11], 8 LDR d2, [x12], 8 LDR d3, [x4], 8 FMLA v24.2s, v20.2s, v0.s[0] FMLA v26.2s, v20.2s, v1.s[0] FMLA v28.2s, v20.2s, v2.s[0] FMLA v30.2s, v20.2s, v3.s[0] FMLA v25.2s, v21.2s, v0.s[1] FMLA v27.2s, v21.2s, v1.s[1] FMLA v29.2s, v21.2s, v2.s[1] FMLA v31.2s, v21.2s, v3.s[1] 6: # Remainder- 1 float of A (4 bytes) TBZ x0, 2, 3b LDR s0, [x3], 4 LDR d20, [x5], 8 LDR s1, [x11], 4 LDR s2, [x12], 4 LDR s3, [x4], 4 FMLA v24.2s, v20.2s, v0.s[0] FMLA v26.2s, v20.2s, v1.s[0] FMLA v28.2s, v20.2s, v2.s[0] FMLA v30.2s, v20.2s, v3.s[0] B 3b # Store odd width 7: $if INC: STR s30, [x7] STR s28, [x10] STR s26, [x9] STR s24, [x6] $else: STR s24, [x6] STR s26, [x9] STR s28, [x10] STR s30, [x7] 10: RET END_FUNCTION xnn_f32_gemm${"inc" if INC else ""}_minmax_ukernel_4x2__aarch64_neonfma${"_prfm" if PREFETCH else ""}_cortex_a75 #ifdef __ELF__ .section ".note.GNU-stack","",%progbits #endif