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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.
$assert DATATYPE in ["F32", "QC4", "QC8"]
#include <xnnpack/assembly.h>
$DATATYPE_SPEC = {"F32": "f32", "QC4": "f32_qc4w", "QC8": "f32_qc8w"}[DATATYPE]
# void xnn_${DATATYPE_SPEC}_gemm${"inc" if INC else ""}_minmax_ukernel_4x8__asm_aarch64_neonfma_ld64(
# size_t mr, x0
# size_t nc, x1
# size_t kc, x2 / x0
# const float* a, x3
# size_t a_stride, x4
# const float* w, x5
# float* c, x6
# size_t cm_stride, x7
# size_t cn_stride, [sp] -> x14
$if INC:
# const float* acc, [sp + 8] -> x15
# const xnn_f32_minmax_params* params) [sp + 16] -> (x8)
$elif DATATYPE == "QC4":
# const xnn_f32_qc4w_minmax_params* params) [sp + 8] -> (x8)
$else:
# const xnn_f32_minmax_params* params) [sp + 8] -> (x8)
# d8-d15, x19-x30 need to be preserved if used. x18 is reserved by the OS.
# Register usage
# A0 x3 v0
# A1 x11 v1
# A2 x12 v2
# A3 x4 v3
# B x5 v20 v21 v22 v23
# C0 x6 v24 v25
# C1 x9 v26 v27
# C2 x10 v28 v29
# C3 x7 v30 v31
# Clamp v4 v5
$if DATATYPE == "QC4":
# zerop/mask v6 v7
BEGIN_FUNCTION xnn_${DATATYPE_SPEC}_gemm${"inc" if INC else ""}_minmax_ukernel_4x8__asm_aarch64_neonfma_ld64
$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]
# 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
$if DATATYPE == "QC4":
# Load min/max/zerop values
LD3R {v4.4s, v5.4s, v6.4s}, [x8]
MOVI v7.8b, 15
$else:
# Load min/max values
LD2R {v4.4s, v5.4s}, [x8]
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
LDP q24, q25, [x15], 32
LDP q26, q27, [x15], 32
LDP q28, q29, [x15], 32
LDP q30, q31, [x15], 32
$else:
# Load initial bias from w into accumulators
LDP q24, q25, [x5], 32
MOV v26.16b, v24.16b
MOV v27.16b, v25.16b
MOV v28.16b, v24.16b
MOV v29.16b, v25.16b
MOV v30.16b, v24.16b
MOV v31.16b, v25.16b
# Is there at least 2 floats (8 bytes)?
SUBS x0, x2, 8 // k = kc - 8
B.LO 3f
# Main loop - 2 floats of A (8 bytes)
1:
LDR d0, [x3], 8
$if DATATYPE == "F32":
LDP q20, q21, [x5], 32 // 8 F32 weights
$elif DATATYPE == "QC4":
LDR d22, [x5], 8 // 16 QC4 weights
AND v21.8b, v22.8b, v7.8b // first set of 8 weights
USHR v23.8b, v22.8b, 4 // second set of 8 weights
SADDW v21.8h, v6.8h, v21.8b
SADDW v23.8h, v6.8h, v23.8b
SXTL v20.4s, v21.4h
SXTL v22.4s, v23.4h
SXTL2 v21.4s, v21.8h
SXTL2 v23.4s, v23.8h
SCVTF v20.4s, v20.4s
SCVTF v21.4s, v21.4s
SCVTF v22.4s, v22.4s
SCVTF v23.4s, v23.4s
$else:
LDR q22, [x5], 16 // 16 QC8 weights
SXTL v21.8h, v22.8b
SXTL2 v23.8h, v22.16b
SXTL v20.4s, v21.4h
SXTL v22.4s, v23.4h
SXTL2 v21.4s, v21.8h
SXTL2 v23.4s, v23.8h
SCVTF v20.4s, v20.4s
SCVTF v21.4s, v21.4s
SCVTF v22.4s, v22.4s
SCVTF v23.4s, v23.4s
LDR d1, [x11], 8
LDR d2, [x12], 8
LDR d3, [x4], 8
FMLA v24.4s, v20.4s, v0.s[0]
FMLA v25.4s, v21.4s, v0.s[0]
FMLA v26.4s, v20.4s, v1.s[0]
FMLA v27.4s, v21.4s, v1.s[0]
$if DATATYPE == "F32":
LDP q22, q23, [x5], 32 // 8 more weights
FMLA v28.4s, v20.4s, v2.s[0]
FMLA v29.4s, v21.4s, v2.s[0]
FMLA v30.4s, v20.4s, v3.s[0]
FMLA v31.4s, v21.4s, v3.s[0]
FMLA v24.4s, v22.4s, v0.s[1]
FMLA v25.4s, v23.4s, v0.s[1]
FMLA v26.4s, v22.4s, v1.s[1]
FMLA v27.4s, v23.4s, v1.s[1]
SUBS x0, x0, 8
FMLA v28.4s, v22.4s, v2.s[1]
FMLA v29.4s, v23.4s, v2.s[1]
FMLA v30.4s, v22.4s, v3.s[1]
FMLA v31.4s, v23.4s, v3.s[1]
B.HS 1b
# Is there a remainder?- 1 float of A (4 bytes)
TBNZ x0, 2, 3f
2:
$if DATATYPE in ["QC8", "QC4"]:
# Scale
LDP q20, q21, [x5], 32
FMUL v24.4s, v24.4s, v20.4s
FMUL v25.4s, v25.4s, v21.4s
FMUL v26.4s, v26.4s, v20.4s
FMUL v27.4s, v27.4s, v21.4s
FMUL v28.4s, v28.4s, v20.4s
FMUL v29.4s, v29.4s, v21.4s
FMUL v30.4s, v30.4s, v20.4s
FMUL v31.4s, v31.4s, v21.4s
# Clamp
FMAX v24.4s, v24.4s, v4.4s
SUBS x1, x1, 8
FMAX v25.4s, v25.4s, v4.4s
FMAX v26.4s, v26.4s, v4.4s
FMAX v27.4s, v27.4s, v4.4s
FMAX v28.4s, v28.4s, v4.4s
FMAX v29.4s, v29.4s, v4.4s
FMAX v30.4s, v30.4s, v4.4s
FMAX v31.4s, v31.4s, v4.4s
FMIN v24.4s, v24.4s, v5.4s
FMIN v25.4s, v25.4s, v5.4s
FMIN v26.4s, v26.4s, v5.4s
FMIN v27.4s, v27.4s, v5.4s
FMIN v28.4s, v28.4s, v5.4s
FMIN v29.4s, v29.4s, v5.4s
FMIN v30.4s, v30.4s, v5.4s
FMIN v31.4s, v31.4s, v5.4s
# Store full 4 x 8
B.LO 4f
$if INC:
ST1 {v30.16b, v31.16b}, [x7], x14
SUB x3, x3, x2 // a0 -= kc
ST1 {v28.16b, v29.16b}, [x10], x14
SUB x11, x11, x2 // a1 -= kc
ST1 {v26.16b, v27.16b}, [x9], x14
SUB x12, x12, x2 // a2 -= kc
ST1 {v24.16b, v25.16b}, [x6], x14
SUB x4, x4, x2 // a3 -= kc
$else:
ST1 {v24.16b, v25.16b}, [x6], x14
SUB x3, x3, x2 // a0 -= kc
ST1 {v26.16b, v27.16b}, [x9], x14
SUB x11, x11, x2 // a1 -= kc
ST1 {v28.16b, v29.16b}, [x10], x14
SUB x12, x12, x2 // a2 -= kc
ST1 {v30.16b, v31.16b}, [x7], x14
SUB x4, x4, x2 // a3 -= kc
B.HI 0b
RET
# Remainder- 1 float of A (4 bytes)
3:
LDR s0, [x3], 4
$if DATATYPE == "F32":
LDP q20, q21, [x5], 32
$elif DATATYPE == "QC4":
LDR d21, [x5], 8 // 8 QC4 weights
SADDW v21.8h, v6.8h, v21.8b
SXTL v20.4s, v21.4h
SXTL2 v21.4s, v21.8h
SCVTF v20.4s, v20.4s
SCVTF v21.4s, v21.4s
$else:
LDR d21, [x5], 8
SXTL v21.8h, v21.8b
SXTL v20.4s, v21.4h
SXTL2 v21.4s, v21.8h
SCVTF v20.4s, v20.4s
SCVTF v21.4s, v21.4s
LDR s1, [x11], 4
LDR s2, [x12], 4
LDR s3 , [x4], 4
FMLA v24.4s, v20.4s, v0.s[0]
FMLA v25.4s, v21.4s, v0.s[0]
FMLA v26.4s, v20.4s, v1.s[0]
FMLA v27.4s, v21.4s, v1.s[0]
FMLA v28.4s, v20.4s, v2.s[0]
FMLA v29.4s, v21.4s, v2.s[0]
FMLA v30.4s, v20.4s, v3.s[0]
FMLA v31.4s, v21.4s, v3.s[0]
B 2b
# Store odd width
4:
TBZ x1, 2, 5f
$if INC:
STR q30, [x7], 16
MOV v30.16b, v31.16b
STR q28, [x10], 16
MOV v28.16b, v29.16b
STR q26, [x9], 16
MOV v26.16b, v27.16b
STR q24, [x6], 16
MOV v24.16b, v25.16b
$else:
STR q24, [x6], 16
MOV v24.16b, v25.16b
STR q26, [x9], 16
MOV v26.16b, v27.16b
STR q28, [x10], 16
MOV v28.16b, v29.16b
STR q30, [x7], 16
MOV v30.16b, v31.16b
5:
TBZ x1, 1, 6f
$if INC:
STR d30, [x7], 8
STR d28, [x10], 8
DUP d30, v30.d[1]
DUP d28, v28.d[1]
STR d26, [x9], 8
STR d24, [x6], 8
DUP d26, v26.d[1]
DUP d24, v24.d[1]
$else:
STR d24, [x6], 8
STR d26, [x9], 8
DUP d24, v24.d[1]
DUP d26, v26.d[1]
STR d28, [x10], 8
STR d30, [x7], 8
DUP d28, v28.d[1]
DUP d30, v30.d[1]
6:
TBZ x1, 0, 7f
$if INC:
STR s30, [x7]
STR s28, [x10]
STR s26, [x9]
STR s24, [x6]
$else:
STR s24, [x6]
STR s26, [x9]
STR s28, [x10]
STR s30, [x7]
7:
RET
END_FUNCTION xnn_${DATATYPE_SPEC}_gemm${"inc" if INC else ""}_minmax_ukernel_4x8__asm_aarch64_neonfma_ld64
#ifdef __ELF__
.section ".note.GNU-stack","",%progbits
#endif
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