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// Copyright 2021 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_minmax_ukernel_6x8__aarch64_neonfma_ld128(
# 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] -> (x0)
# size_t a_offset, [sp + 8] -> x11
# const float* zero, [sp + 16] -> x12
# const xnn_f32_minmax_params params [sp + 24] -> x8
# d8-d15, x19-x30 need to be preserved if used. x18 is reserved by the OS.
# A pointers
# x14 a0
# x15 a1
# x20 a2
# x21 a3
# x22 a4
# x23 a5
# C pointers
# x6 c0
# x16 c1
# x17 c2
# x10 c3
# x13 c4
# x7 c5
# Vector register usage
# A0 v0
# A1 v1
# A2 v2
# A3 v3
# A4 v4
# A5 v5
# B v16 v17 v18 v19
# 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
# unused B v12 v13 v14 v15
BEGIN_FUNCTION xnn_f32_igemm_minmax_ukernel_6x8__aarch64_neonfma_ld128
# Load zero, params pointer
LDP x12, x8, [sp, 16]
# Clamp C pointers
CMP x0, 2 // if mr < 2
ADD x16, x6, x7 // c1 = c0 + cm_stride
CSEL x16, x6, x16, LO // c1 = c0
# Load min/max values
LD2R {v6.4s, v7.4s}, [x8]
ADD x17, x16, x7 // c2 = c1 + cm_stride
// if mr <= 2
CSEL x17, x16, x17, LS // c2 = c1
# Save x20,x21,x22,x23 on stack
STP x20, x21, [sp, -32]!
CMP x0, 4 // if mr < 4
ADD x10, x17, x7 // c3 = c2 + cm_stride
CSEL x10, x17, x10, LO // c3 = c2
STP x22, x23, [sp, 16]
ADD x13, x10, x7 // c4 = c3 + cm_stride
// if mr <= 4
CSEL x13, x10, x13, LS // c4 = c3
# Load a_offset
LDR x11, [sp, 40]
CMP x0, 6 // if mr < 6
ADD x7, x13, x7 // c5 = c4 + cm_stride
CSEL x7, x13, x7, LO // c5 = c4
0:
# Load initial bias from w into accumulators
LDP q20, q21, [x5], 32
MOV v22.16b, v20.16b
MOV v23.16b, v21.16b
MOV v24.16b, v20.16b
MOV v25.16b, v21.16b
MOV v26.16b, v20.16b
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)?
SUBS x0, x2, 16 // k = kc - 16
B.LO 4f
# Main loop - 4 floats of A (16 bytes)
# 48 FMA + 6 ld128 A + 4 LDP B
2:
LDP q16, q17, [x5], 32
LDR q0, [x14], 16
LDR q1, [x15], 16
LDR q2, [x20], 16
LDR q3, [x21], 16
LDR q4, [x22], 16
LDR q5, [x23], 16
FMLA v20.4s, v16.4s, v0.s[0]
FMLA v22.4s, v16.4s, v1.s[0]
FMLA v24.4s, v16.4s, v2.s[0]
FMLA v26.4s, v16.4s, v3.s[0]
LDP q18, q19, [x5], 32
FMLA v28.4s, v16.4s, v4.s[0]
FMLA v30.4s, v16.4s, v5.s[0]
FMLA v21.4s, v17.4s, v0.s[0]
FMLA v23.4s, v17.4s, v1.s[0]
FMLA v25.4s, v17.4s, v2.s[0]
FMLA v27.4s, v17.4s, v3.s[0]
FMLA v29.4s, v17.4s, v4.s[0]
FMLA v31.4s, v17.4s, v5.s[0]
FMLA v20.4s, v18.4s, v0.s[1]
LDP q16, q17, [x5], 32
FMLA v22.4s, v18.4s, v1.s[1]
FMLA v24.4s, v18.4s, v2.s[1]
FMLA v26.4s, v18.4s, v3.s[1]
FMLA v28.4s, v18.4s, v4.s[1]
FMLA v30.4s, v18.4s, v5.s[1]
FMLA v21.4s, v19.4s, v0.s[1]
FMLA v23.4s, v19.4s, v1.s[1]
FMLA v25.4s, v19.4s, v2.s[1]
FMLA v27.4s, v19.4s, v3.s[1]
FMLA v29.4s, v19.4s, v4.s[1]
FMLA v31.4s, v19.4s, v5.s[1]
FMLA v20.4s, v16.4s, v0.s[2]
LDP q18, q19, [x5], 32
FMLA v22.4s, v16.4s, v1.s[2]
FMLA v24.4s, v16.4s, v2.s[2]
FMLA v26.4s, v16.4s, v3.s[2]
FMLA v28.4s, v16.4s, v4.s[2]
FMLA v30.4s, v16.4s, v5.s[2]
FMLA v21.4s, v17.4s, v0.s[2]
FMLA v23.4s, v17.4s, v1.s[2]
FMLA v25.4s, v17.4s, v2.s[2]
FMLA v27.4s, v17.4s, v3.s[2]
FMLA v29.4s, v17.4s, v4.s[2]
FMLA v31.4s, v17.4s, v5.s[2]
FMLA v20.4s, v18.4s, v0.s[3]
FMLA v22.4s, v18.4s, v1.s[3]
FMLA v24.4s, v18.4s, v2.s[3]
FMLA v26.4s, v18.4s, v3.s[3]
FMLA v28.4s, v18.4s, v4.s[3]
FMLA v30.4s, v18.4s, v5.s[3]
FMLA v21.4s, v19.4s, v0.s[3]
FMLA v23.4s, v19.4s, v1.s[3]
FMLA v25.4s, v19.4s, v2.s[3]
FMLA v27.4s, v19.4s, v3.s[3]
SUBS x0, x0, 16
FMLA v29.4s, v19.4s, v4.s[3]
FMLA v31.4s, v19.4s, v5.s[3]
B.HS 2b
# Is there a remainder?- 2 floats of A (8 bytes) or less
TST x0, 15
B.NE 4f
3:
# ks loop
SUBS x9, x9, 48 // ks -= MR * sizeof(void*)
B.HI 1b
# Clamp
FMAX v20.4s, v20.4s, v6.4s
# Load cn_stride
LDR x0, [sp, 32]
FMAX v21.4s, v21.4s, v6.4s
FMAX v22.4s, v22.4s, v6.4s
FMAX v23.4s, v23.4s, v6.4s
FMAX v24.4s, v24.4s, v6.4s
FMAX v25.4s, v25.4s, v6.4s
FMAX v26.4s, v26.4s, v6.4s
FMAX v27.4s, v27.4s, v6.4s
FMAX v28.4s, v28.4s, v6.4s
FMAX v29.4s, v29.4s, v6.4s
FMAX v30.4s, v30.4s, v6.4s
FMAX v31.4s, v31.4s, v6.4s
SUBS x1, x1, 8
FMIN v20.4s, v20.4s, v7.4s
FMIN v21.4s, v21.4s, v7.4s
FMIN v22.4s, v22.4s, v7.4s
FMIN v23.4s, v23.4s, v7.4s
FMIN v24.4s, v24.4s, v7.4s
FMIN v25.4s, v25.4s, v7.4s
FMIN v26.4s, v26.4s, v7.4s
FMIN v27.4s, v27.4s, v7.4s
FMIN v28.4s, v28.4s, v7.4s
FMIN v29.4s, v29.4s, v7.4s
FMIN v30.4s, v30.4s, v7.4s
FMIN v31.4s, v31.4s, v7.4s
# Store full 6 x 8
B.LO 6f
STP q30, q31, [x7]
ADD x7, x7, x0
STP q28, q29, [x13]
ADD x13, x13, x0
STP q26, q27, [x10]
ADD x10, x10, x0
STP q24, q25, [x17]
ADD x17, x17, x0
STP q22, q23, [x16]
ADD x16, x16, x0
STP q20, q21, [x6]
ADD x6, x6, x0
SUB x4, x4, x3 // a -= ks
# nc loop
B.HI 0b
# Restore x20,x21,x22,x23 from stack
LDP x22, x23, [sp, 16]
LDP x20, x21, [sp], 32
RET
4:
# Is there a remainder?- 2 floats of A (8 bytes)
TBZ x0, 3, 5f
# Remainder- 2 floats of A (8 bytes)
LDR d0, [x14], 8
LDP q16, q17, [x5], 32
LDR d1, [x15], 8
LDR d2, [x20], 8
LDR d3, [x21], 8
LDR d4, [x22], 8
LDR d5, [x23], 8
FMLA v20.4s, v16.4s, v0.s[0]
FMLA v22.4s, v16.4s, v1.s[0]
FMLA v24.4s, v16.4s, v2.s[0]
FMLA v26.4s, v16.4s, v3.s[0]
LDP q18, q19, [x5], 32
FMLA v28.4s, v16.4s, v4.s[0]
FMLA v30.4s, v16.4s, v5.s[0]
FMLA v21.4s, v17.4s, v0.s[0]
FMLA v23.4s, v17.4s, v1.s[0]
FMLA v25.4s, v17.4s, v2.s[0]
FMLA v27.4s, v17.4s, v3.s[0]
FMLA v29.4s, v17.4s, v4.s[0]
FMLA v31.4s, v17.4s, v5.s[0]
FMLA v20.4s, v18.4s, v0.s[1]
FMLA v22.4s, v18.4s, v1.s[1]
FMLA v24.4s, v18.4s, v2.s[1]
FMLA v26.4s, v18.4s, v3.s[1]
FMLA v28.4s, v18.4s, v4.s[1]
FMLA v30.4s, v18.4s, v5.s[1]
FMLA v21.4s, v19.4s, v0.s[1]
FMLA v23.4s, v19.4s, v1.s[1]
FMLA v25.4s, v19.4s, v2.s[1]
FMLA v27.4s, v19.4s, v3.s[1]
FMLA v29.4s, v19.4s, v4.s[1]
FMLA v31.4s, v19.4s, v5.s[1]
# Is there a remainder?- 1 floats of A (4 bytes)
TBZ x0, 2, 3b
# Remainder- 1 float of A (4 bytes)
5:
LDR s0, [x14], 4
LDP q16, q17, [x5], 32
LDR s1, [x15], 4
LDR s2, [x20], 4
LDR s3, [x21], 4
LDR s4, [x22], 4
LDR s5, [x23], 4
FMLA v20.4s, v16.4s, v0.s[0]
FMLA v22.4s, v16.4s, v1.s[0]
FMLA v24.4s, v16.4s, v2.s[0]
FMLA v26.4s, v16.4s, v3.s[0]
FMLA v28.4s, v16.4s, v4.s[0]
FMLA v30.4s, v16.4s, v5.s[0]
FMLA v21.4s, v17.4s, v0.s[0]
FMLA v23.4s, v17.4s, v1.s[0]
FMLA v25.4s, v17.4s, v2.s[0]
FMLA v27.4s, v17.4s, v3.s[0]
FMLA v29.4s, v17.4s, v4.s[0]
FMLA v31.4s, v17.4s, v5.s[0]
B 3b
# Store odd width
6:
TBZ x1, 2, 7f
STR q30, [x7], 16
MOV v30.16b, v31.16b
STR q28, [x13], 16
MOV v28.16b, v29.16b
STR q26, [x10], 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
7:
TBZ x1, 1, 8f
STR d30, [x7], 8
STR d28, [x13], 8
DUP d30, v30.d[1]
DUP d28, v28.d[1]
STR d26, [x10], 8
STR d24, [x17], 8
DUP d26, v26.d[1]
DUP d24, v24.d[1]
STR d22, [x16], 8
STR d20, [x6], 8
DUP d22, v22.d[1]
DUP d20, v20.d[1]
8:
TBZ x1, 0, 9f
STR s30, [x7]
STR s28, [x13]
STR s26, [x10]
STR s24, [x17]
STR s22, [x16]
STR s20, [x6]
9:
# Restore x20,x21,x22,x23 from stack
LDP x22, x23, [sp, 16]
LDP x20, x21, [sp], 32
RET
END_FUNCTION xnn_f32_igemm_minmax_ukernel_6x8__aarch64_neonfma_ld128
#ifdef __ELF__
.section ".note.GNU-stack","",%progbits
#endif