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// 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 <xnnpack/assembly.h>
# void xnn_f32_igemm_ukernel_6x8__aarch64_neonfma_cortex_a53(
# size_t mr, x0
# size_t nc, x1
# size_t kc, x2 / x0
# size_t ks, x3 / x9
# const float**restrict a, x4
# const void*restrict w, x5
# uint8_t*restrict c, x6
# size_t cm_stride, x7
# size_t cn_stride, [sp] -> x10
# size_t a_offset, [sp + 8] -> x11
# const float* zero, [sp + 16] -> x12
# const xnn_f32_output_params params [sp + 24] -> x8
# d8-d15 need to be preserved if used.
# x19-30 need to be preserved if used.
# A pointers
# x14 a0
# x15 a1
# x20 a2
# x21 a3
# x22 a4
# x23 a5
# C pointers
# x6 c0
# x16 c1
# x17 c2
# x18 c3
# x13 c4
# x7 c5
# x19 temporary vector shadow register
# Vector register usage
# A0 v0 v3
# A1 v0[1] v3[1]
# A2 v1 v4
# A3 v1[1] v4[1]
# A4 v2 v5
# A5 v2[1] v5[1]
# B v12 v13 v14 v15 second set of B
# B v16 v17 v18 v19 first set
# C v20 v21
# C v22 v23
# C v24 v25
# C v26 v27
# C v28 v29
# C v30 v31
# Clamp v6 v7
# unused A v8 v9 v10 v11
BEGIN_FUNCTION xnn_f32_igemm_ukernel_6x8__aarch64_neonfma_cortex_a53
# 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 x18, x17, x7 // c3 = c2 + cm_stride
CSEL x18, x17, x18, LO // c3 = c2
ADD x13, x18, x7 // c4 = c3 + cm_stride
// if mr <= 5
CSEL x13, x18, x13, LS // c4 = c3
CMP x0, 6 // if mr < 6
ADD x7, x13, x7 // c5 = c4 + cm_stride
CSEL x7, x13, x7, LO // c5 = c4
# Load cn_stride, a_offset
LDP x10, x11, [sp]
# Load zero, clamping params pointer
LDP x12, x8, [sp, 16]
# Load clamping_params values
LD2R {v6.4s, v7.4s}, [x8]
// Save x19-x23, d12-d15 on stack
STP d12, d13, [sp, -80]!
STP d14, d15, [sp, 16]
STP x19, x20, [sp, 32]
STP x21, x22, [sp, 48]
STR x23, [sp, 64]
0:
# Load initial bias from w into accumulators
LDP q20, q21, [x5], 32
MOV v22.16b, v20.16b
MOV v23.16b, v21.16b
PRFM PLDL1KEEP, [x5, 0] // Prefetch B
MOV v24.16b, v20.16b
PRFM PLDL1KEEP, [x5, 64]
MOV v25.16b, v21.16b
PRFM PLDL1KEEP, [x5, 128]
MOV v26.16b, v20.16b
PRFM PLDL1KEEP, [x5, 192]
MOV v27.16b, v21.16b
MOV v28.16b, v20.16b
MOV v29.16b, v21.16b
MOV v30.16b, v20.16b
MOV v31.16b, v21.16b
MOV x9, x3 // p = ks
1:
# Load next 6 A pointers
LDP x14, x15, [x4], 16
LDP x20, x21, [x4], 16
LDP x22, x23, [x4], 16
CMP x14, x12 // if a0 == zero
ADD x14, x14, x11 // a0 += a_offset
CSEL x14, x12, x14, EQ // a0 = zero, else += a0 + a_offset
CMP x15, x12 // if a1 == zero
ADD x15, x15, x11 // a1 += a_offset
CSEL x15, x12, x15, EQ // a1 = zero, else += a1 + a_offset
CMP x20, x12 // if a2 == zero
ADD x20, x20, x11 // a2 += a_offset
CSEL x20, x12, x20, EQ // a2 = zero, else += a2 + a_offset
CMP x21, x12 // if a3 == zero
ADD x21, x21, x11 // a3 += a_offset
CSEL x21, x12, x21, EQ // a3 = zero, else += a3 + a_offset
CMP x22, x12 // if a4 == zero
ADD x22, x22, x11 // a4 += a_offset
CSEL x22, x12, x22, EQ // a4 = zero, else += a4 + a_offset
CMP x23, x12 // if a5 == zero
ADD x23, x23, x11 // a5 += a_offset
CSEL x23, x12, x23, EQ // a5 = zero, else += a5 + a_offset
# Is there at least 4 floats (16 bytes) for prologue + epilogue?
SUBS x0, x2, 16 // k = kc - 16
B.LO 5f
# Prologue - First group loads, no FMA
LDR d0, [x14], 8 // a0
LDP q16, q17, [x5], 32 // b
LDR d1, [x20], 8 // a2
LDR d2, [x22], 8 // a4
LD1 {v0.d}[1], [x15], 8 // a1
LD1 {v1.d}[1], [x21], 8 // a3
LD1 {v2.d}[1], [x23], 8 // a5
SUBS x0, x0, 16
LDR q18, [x5], 16
LDR d19, [x5], 8
LDR x19, [x5], 8 // ins is in BLOCK 0
# Is there at least 4 floats (16 bytes) for main loop?
B.LO 3f
# Main loop - 4 floats of A (16 bytes)
# 48 FMA + 12 LD64 A + 8 LDR B
2:
# First group of 24 FMA, Second group loads
// BLOCK 0
LDR d3, [x14], 8 // a0
INS v19.d[1], x19 // b from second group
FMLA v20.4s, v16.4s, v0.s[0]
LDR x19, [x15], 8 // a1
FMLA v22.4s, v16.4s, v0.s[2]
FMLA v24.4s, v16.4s, v1.s[0]
// BLOCK 1
LDR d12, [x5]
INS v3.d[1], x19 // a1 ins
FMLA v26.4s, v16.4s, v1.s[2]
LDR x19, [x5, 8] // b
FMLA v28.4s, v16.4s, v2.s[0]
FMLA v30.4s, v16.4s, v2.s[2]
// BLOCK 2
LDR d4, [x20], 8 // a2
INS v12.d[1], x19 // b ins
FMLA v21.4s, v17.4s, v0.s[0]
LDR x19, [x21], 8 // a3
FMLA v23.4s, v17.4s, v0.s[2]
FMLA v25.4s, v17.4s, v1.s[0]
// BLOCK 3
LDR d5, [x22], 8 // a4
INS v4.d[1], x19 // a3 ins
FMLA v27.4s, v17.4s, v1.s[2]
LDR x19, [x23], 8 // a5
FMLA v29.4s, v17.4s, v2.s[0]
FMLA v31.4s, v17.4s, v2.s[2]
// BLOCK 4
LDR d13, [x5, 16]
INS v5.d[1], x19 // a5 ins
FMLA v20.4s, v18.4s, v0.s[1]
LDR x19, [x5, 24]
FMLA v22.4s, v18.4s, v0.s[3]
FMLA v24.4s, v18.4s, v1.s[1]
// BLOCK 5
LDR d14, [x5, 32]
INS v13.d[1], x19 // b
FMLA v26.4s, v18.4s, v1.s[3]
LDR x19, [x5, 40]
FMLA v28.4s, v18.4s, v2.s[1]
FMLA v30.4s, v18.4s, v2.s[3]
// BLOCK 6
LDR d15, [x5, 48]
INS v14.d[1], x19 // b
FMLA v21.4s, v19.4s, v0.s[1]
LDR x19, [x5, 56]
FMLA v23.4s, v19.4s, v0.s[3]
FMLA v25.4s, v19.4s, v1.s[1]
// BLOCK 7
INS v15.d[1], x19
FMLA v27.4s, v19.4s, v1.s[3]
FMLA v29.4s, v19.4s, v2.s[1]
FMLA v31.4s, v19.4s, v2.s[3]
# Second group of 24 FMA, First group of loads
// BLOCK 0
LDR d0, [x14], 8 // a0
FMLA v20.4s, v12.4s, v3.s[0]
LDR x19, [x15], 8 // a1
FMLA v22.4s, v12.4s, v3.s[2]
FMLA v24.4s, v12.4s, v4.s[0]
PRFM PLDL1KEEP, [x14, 128] // Prefetch A0
// BLOCK 1
LDR d16, [x5, 64]
INS v0.d[1], x19 // a1 ins
FMLA v26.4s, v12.4s, v4.s[2]
LDR x19, [x5, 72] // b
FMLA v28.4s, v12.4s, v5.s[0]
FMLA v30.4s, v12.4s, v5.s[2]
PRFM PLDL1KEEP, [x15, 128] // Prefetch A1
// BLOCK 2
LDR d1, [x20], 8 // a2
INS v16.d[1], x19 // b
FMLA v21.4s, v13.4s, v3.s[0]
LDR x19, [x21], 8 // a3
FMLA v23.4s, v13.4s, v3.s[2]
FMLA v25.4s, v13.4s, v4.s[0]
PRFM PLDL1KEEP, [x20, 128] // Prefetch A2
// BLOCK 3
LDR d2, [x22], 8 // a4
INS v1.d[1], x19 // a3 ins
FMLA v27.4s, v13.4s, v4.s[2]
LDR x19, [x23], 8 // a5
FMLA v29.4s, v13.4s, v5.s[0]
FMLA v31.4s, v13.4s, v5.s[2]
PRFM PLDL1KEEP, [x21, 128] // Prefetch A3
// BLOCK 4
LDR d17, [x5, 80]
INS v2.d[1], x19 // a5 ins
FMLA v20.4s, v14.4s, v3.s[1]
LDR x19, [x5, 88]
FMLA v22.4s, v14.4s, v3.s[3]
FMLA v24.4s, v14.4s, v4.s[1]
PRFM PLDL1KEEP, [x22, 128] // Prefetch A4
// BLOCK 5
LDR d18, [x5, 96]
INS v17.d[1], x19 // b
FMLA v26.4s, v14.4s, v4.s[3]
LDR x19, [x5, 104]
FMLA v28.4s, v14.4s, v5.s[1]
FMLA v30.4s, v14.4s, v5.s[3]
PRFM PLDL1KEEP, [x23, 128] // Prefetch A5
// BLOCK 6
LDR d19, [x5, 112]
INS v18.d[1], x19 // b
FMLA v21.4s, v15.4s, v3.s[1]
LDR x19, [x5, 120]
FMLA v23.4s, v15.4s, v3.s[3]
PRFM PLDL1KEEP, [x5, 192] // Prefetch B
FMLA v25.4s, v15.4s, v4.s[1]
PRFM PLDL1KEEP, [x5, 256] // Prefetch B
// BLOCK 7
SUBS x0, x0, 16 // LDR lands here
FMLA v27.4s, v15.4s, v4.s[3]
FMLA v29.4s, v15.4s, v5.s[1]
ADD x5, x5, 128
FMLA v31.4s, v15.4s, v5.s[3]
B.HS 2b
# Epilogue - 4 floats of A (16 bytes)
# 48 FMA + 12 LD64 A + 8 LDR B
3:
# First group of 24 FMA, Second group loads
// BLOCK 0
LDR d3, [x14], 8 // a0
INS v19.d[1], x19 // b from second group
FMLA v20.4s, v16.4s, v0.s[0]
LDR x19, [x15], 8 // a1
FMLA v22.4s, v16.4s, v0.s[2]
FMLA v24.4s, v16.4s, v1.s[0]
PRFM PSTL1KEEP, [x6] // Prefetch C0
// BLOCK 1
LDR d12, [x5]
INS v3.d[1], x19 // a1 ins
FMLA v26.4s, v16.4s, v1.s[2]
LDR x19, [x5, 8] // b
FMLA v28.4s, v16.4s, v2.s[0]
FMLA v30.4s, v16.4s, v2.s[2]
PRFM PSTL1KEEP, [x16] // Prefetch C1
// BLOCK 2
LDR d4, [x20], 8 // a2
INS v12.d[1], x19 // b ins
FMLA v21.4s, v17.4s, v0.s[0]
LDR x19, [x21], 8 // a3
FMLA v23.4s, v17.4s, v0.s[2]
FMLA v25.4s, v17.4s, v1.s[0]
PRFM PSTL1KEEP, [x17] // Prefetch C2
// BLOCK 3
LDR d5, [x22], 8 // a4
INS v4.d[1], x19 // a3 ins
FMLA v27.4s, v17.4s, v1.s[2]
LDR x19, [x23], 8 // a5
FMLA v29.4s, v17.4s, v2.s[0]
FMLA v31.4s, v17.4s, v2.s[2]
PRFM PSTL1KEEP, [x18] // Prefetch C3
// BLOCK 4
LDR d13, [x5, 16]
INS v5.d[1], x19 // a5 ins
FMLA v20.4s, v18.4s, v0.s[1]
LDR x19, [x5, 24]
FMLA v22.4s, v18.4s, v0.s[3]
FMLA v24.4s, v18.4s, v1.s[1]
PRFM PSTL1KEEP, [x13] // Prefetch C4
// BLOCK 5
LDR d14, [x5, 32]
INS v13.d[1], x19 // b
FMLA v26.4s, v18.4s, v1.s[3]
LDR x19, [x5, 40]
FMLA v28.4s, v18.4s, v2.s[1]
FMLA v30.4s, v18.4s, v2.s[3]
PRFM PSTL1KEEP, [x7] // Prefetch C5
// BLOCK 6
LDR d15, [x5, 48]
INS v14.d[1], x19 // b
FMLA v21.4s, v19.4s, v0.s[1]
LDR x19, [x5, 56]
FMLA v23.4s, v19.4s, v0.s[3]
FMLA v25.4s, v19.4s, v1.s[1]
// BLOCK 7
INS v15.d[1], x19 // b from previous
FMLA v27.4s, v19.4s, v1.s[3]
FMLA v29.4s, v19.4s, v2.s[1]
FMLA v31.4s, v19.4s, v2.s[3]
# Second group of 24 FMA, First group of loads
// BLOCK 0
FMLA v20.4s, v12.4s, v3.s[0]
FMLA v22.4s, v12.4s, v3.s[2]
FMLA v24.4s, v12.4s, v4.s[0]
// BLOCK 1
FMLA v26.4s, v12.4s, v4.s[2]
FMLA v28.4s, v12.4s, v5.s[0]
FMLA v30.4s, v12.4s, v5.s[2]
// BLOCK 2
FMLA v21.4s, v13.4s, v3.s[0]
FMLA v23.4s, v13.4s, v3.s[2]
FMLA v25.4s, v13.4s, v4.s[0]
// BLOCK 3
FMLA v27.4s, v13.4s, v4.s[2]
FMLA v29.4s, v13.4s, v5.s[0]
FMLA v31.4s, v13.4s, v5.s[2]
// BLOCK 4
FMLA v20.4s, v14.4s, v3.s[1]
FMLA v22.4s, v14.4s, v3.s[3]
FMLA v24.4s, v14.4s, v4.s[1]
// BLOCK 5
FMLA v26.4s, v14.4s, v4.s[3]
FMLA v28.4s, v14.4s, v5.s[1]
FMLA v30.4s, v14.4s, v5.s[3]
// BLOCK 6
FMLA v21.4s, v15.4s, v3.s[1]
FMLA v23.4s, v15.4s, v3.s[3]
FMLA v25.4s, v15.4s, v4.s[1]
TST x0, 15
// BLOCK 7
FMLA v27.4s, v15.4s, v4.s[3]
FMLA v29.4s, v15.4s, v5.s[1]
FMLA v31.4s, v15.4s, v5.s[3]
ADD x5, x5, 64
# Is there a remainder?- 2 floats of A (8 bytes) or less
B.NE 5f
4:
# ks loop
SUBS x9, x9, 48 // ks -= MR * sizeof(void*)
B.NE 1b
# Clamp
FMIN v20.4s, v20.4s, v6.4s
SUBS x1, x1, 8
FMIN v21.4s, v21.4s, v6.4s
FMIN v22.4s, v22.4s, v6.4s
FMIN v23.4s, v23.4s, v6.4s
FMIN v24.4s, v24.4s, v6.4s
FMIN v25.4s, v25.4s, v6.4s
FMIN v26.4s, v26.4s, v6.4s
FMIN v27.4s, v27.4s, v6.4s
FMIN v28.4s, v28.4s, v6.4s
FMIN v29.4s, v29.4s, v6.4s
FMIN v30.4s, v30.4s, v6.4s
FMIN v31.4s, v31.4s, v6.4s
FMAX v20.4s, v20.4s, v7.4s
FMAX v21.4s, v21.4s, v7.4s
FMAX v22.4s, v22.4s, v7.4s
FMAX v23.4s, v23.4s, v7.4s
FMAX v24.4s, v24.4s, v7.4s
FMAX v25.4s, v25.4s, v7.4s
FMAX v26.4s, v26.4s, v7.4s
FMAX v27.4s, v27.4s, v7.4s
FMAX v28.4s, v28.4s, v7.4s
FMAX v29.4s, v29.4s, v7.4s
FMAX v30.4s, v30.4s, v7.4s
FMAX v31.4s, v31.4s, v7.4s
# Store full 6 x 8
B.LO 8f
STP q30, q31, [x7]
ADD x7, x7, x10
STP q28, q29, [x13]
ADD x13, x13, x10
STP q26, q27, [x18]
ADD x18, x18, x10
STP q24, q25, [x17]
ADD x17, x17, x10
STP q22, q23, [x16]
ADD x16, x16, x10
STP q20, q21, [x6]
ADD x6, x6, x10
SUB x4, x4, x3 // a -= ks
# nc loop
B.HI 0b
// Restore x19-x23, d12-d15 from stack
LDR x23, [sp, 64]
LDP x21, x22, [sp, 48]
LDP x19, x20, [sp, 32]
LDP d14, d15, [sp, 16]
LDP d12, d13, [sp], 80
RET
5:
# Is there a remainder?- 2 floats of A (8 bytes)
TBZ x0, 3, 6f
# Remainder- 2 floats of A (8 bytes)
LDR d0, [x14], 8
LDR q16, [x5], 16
LD1 {v0.d}[1], [x15], 8
LDR d1, [x20], 8
LD1 {v1.d}[1], [x21], 8
LDR d2, [x22], 8
LD1 {v2.d}[1], [x23], 8
LDR q17, [x5], 16
LDR q18, [x5], 16
LDR q19, [x5], 16
FMLA v20.4s, v16.4s, v0.s[0]
FMLA v22.4s, v16.4s, v0.s[2]
FMLA v24.4s, v16.4s, v1.s[0]
FMLA v26.4s, v16.4s, v1.s[2]
FMLA v28.4s, v16.4s, v2.s[0]
FMLA v30.4s, v16.4s, v2.s[2]
FMLA v21.4s, v17.4s, v0.s[0]
FMLA v23.4s, v17.4s, v0.s[2]
FMLA v25.4s, v17.4s, v1.s[0]
FMLA v27.4s, v17.4s, v1.s[2]
FMLA v29.4s, v17.4s, v2.s[0]
FMLA v31.4s, v17.4s, v2.s[2]
FMLA v20.4s, v18.4s, v0.s[1]
FMLA v22.4s, v18.4s, v0.s[3]
FMLA v24.4s, v18.4s, v1.s[1]
FMLA v26.4s, v18.4s, v1.s[3]
FMLA v28.4s, v18.4s, v2.s[1]
FMLA v30.4s, v18.4s, v2.s[3]
FMLA v21.4s, v19.4s, v0.s[1]
FMLA v23.4s, v19.4s, v0.s[3]
FMLA v25.4s, v19.4s, v1.s[1]
FMLA v27.4s, v19.4s, v1.s[3]
FMLA v29.4s, v19.4s, v2.s[1]
FMLA v31.4s, v19.4s, v2.s[3]
# Is there a remainder?- 1 floats of A (4 bytes)
TBZ x0, 2, 4b
6:
# Remainder- 1 floats of A (4 bytes)
LDR s0, [x14], 4
LDR q16, [x5], 16
LD1 {v0.s}[2], [x15], 4
LDR s1, [x20], 4
LD1 {v1.s}[2], [x21], 4
LDR s2, [x22], 4
LD1 {v2.s}[2], [x23], 4
LDR q17, [x5], 16
FMLA v20.4s, v16.4s, v0.s[0]
FMLA v22.4s, v16.4s, v0.s[2]
FMLA v24.4s, v16.4s, v1.s[0]
FMLA v26.4s, v16.4s, v1.s[2]
FMLA v28.4s, v16.4s, v2.s[0]
FMLA v30.4s, v16.4s, v2.s[2]
FMLA v21.4s, v17.4s, v0.s[0]
FMLA v23.4s, v17.4s, v0.s[2]
FMLA v25.4s, v17.4s, v1.s[0]
FMLA v27.4s, v17.4s, v1.s[2]
FMLA v29.4s, v17.4s, v2.s[0]
FMLA v31.4s, v17.4s, v2.s[2]
B 4b
# Store odd width
8:
TBZ x1, 2, 9f
STR q30, [x7], 16
MOV v30.16b, v31.16b
STR q28, [x13], 16
MOV v28.16b, v29.16b
STR q26, [x18], 16
MOV v26.16b, v27.16b
STR q24, [x17], 16
MOV v24.16b, v25.16b
STR q22, [x16], 16
MOV v22.16b, v23.16b
STR q20, [x6], 16
MOV v20.16b, v21.16b
9:
TBZ x1, 1, 10f
STR d30, [x7], 8
DUP d30, v30.d[1]
STR d28, [x13], 8
DUP d28, v28.d[1]
STR d26, [x18], 8
DUP d26, v26.d[1]
STR d24, [x17], 8
DUP d24, v24.d[1]
STR d22, [x16], 8
DUP d22, v22.d[1]
STR d20, [x6], 8
DUP d20, v20.d[1]
10:
TBZ x1, 0, 11f
STR s30, [x7]
STR s28, [x13]
STR s26, [x18]
STR s24, [x17]
STR s22, [x16]
STR s20, [x6]
11:
// Restore x19-x23, d12-d15 from stack
LDR x23, [sp, 64]
LDP x21, x22, [sp, 48]
LDP x19, x20, [sp, 32]
LDP d14, d15, [sp, 16]
LDP d12, d13, [sp], 80
RET
END_FUNCTION xnn_f32_igemm_ukernel_6x8__aarch64_neonfma_cortex_a53
#ifdef __ELF__
.section ".note.GNU-stack","",%progbits
#endif