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ntt_kyber_123_4567_scalar_store.s
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///
/// Copyright (c) 2022 Arm Limited
/// Copyright (c) 2022 Hanno Becker
/// Copyright (c) 2023 Amin Abdulrahman, Matthias Kannwischer
/// SPDX-License-Identifier: MIT
///
/// Permission is hereby granted, free of charge, to any person obtaining a copy
/// of this software and associated documentation files (the "Software"), to deal
/// in the Software without restriction, including without limitation the rights
/// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
/// copies of the Software, and to permit persons to whom the Software is
/// furnished to do so, subject to the following conditions:
///
/// The above copyright notice and this permission notice shall be included in all
/// copies or substantial portions of the Software.
///
/// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
/// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
/// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
/// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
/// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
/// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
/// SOFTWARE.
///
// Needed to provide ASM_LOAD directive
#include <hal_env.h>
// NOTE
// We use a lot of trivial macros to simplify the parsing burden for Slothy
// The macros are not unfolded by Slothy and thus interpreted as instructions,
// which are easier to parse due to e.g. the lack of size specifiers and simpler
// syntax for pre and post increment for loads and stores.
//
// Eventually, NeLight should include a proper parser for AArch64,
// but for initial investigations, the below is enough.
.macro ldr_vo vec, base, offset
ldr qform_\vec, [\base, #\offset]
.endm
.macro ldr_vi vec, base, inc
ldr qform_\vec, [\base], #\inc
.endm
.macro str_vo vec, base, offset
str qform_\vec, [\base, #\offset]
.endm
.macro str_vi vec, base, inc
str qform_\vec, [\base], #\inc
.endm
.macro vqrdmulh d,a,b
sqrdmulh \d\().8h, \a\().8h, \b\().8h
.endm
.macro vmlsq d,a,b,i
mls \d\().8h, \a\().8h, \b\().h[\i]
.endm
.macro vqrdmulhq d,a,b,i
sqrdmulh \d\().8h, \a\().8h, \b\().h[\i]
.endm
.macro vqdmulhq d,a,b,i
sqdmulh \d\().8h, \a\().8h, \b\().h[\i]
.endm
.macro vmulq d,a,b,i
mul \d\().8h, \a\().8h, \b\().h[\i]
.endm
.macro mulmodq dst, src, const, idx0, idx1
vmulq \dst, \src, \const, \idx0
vqrdmulhq \src, \src, \const, \idx1
vmlsq \dst, \src, consts, 0
.endm
.macro mulmod dst, src, const, const_twisted
mul \dst\().8h, \src\().8h, \const\().8h
vqrdmulh \src, \src, \const_twisted
vmlsq \dst, \src, consts, 0
.endm
.macro ct_butterfly a, b, root, idx0, idx1
mulmodq tmp, \b, \root, \idx0, \idx1
sub \b\().8h, \a\().8h, tmp.8h
add \a\().8h, \a\().8h, tmp.8h
.endm
.macro mulmod_v dst, src, const, const_twisted
vmul \dst, \src, \const
vqrdmulh \src, \src, \const_twisted
vmlsq \dst, \src, consts, 0
.endm
.macro ct_butterfly_v a, b, root, root_twisted
mulmod tmp, \b, \root, \root_twisted
sub \b\().8h, \a\().8h, tmp.8h
add \a\().8h, \a\().8h, tmp.8h
.endm
.macro barrett_reduce a
vqdmulhq tmp, \a, consts, 1
srshr tmp.8h, tmp.8h, #11
vmlsq \a, tmp, consts, 0
.endm
.macro load_roots_123
ldr_vi root0, r_ptr0, 32
ldr_vo root1, r_ptr0, -16
.endm
.macro load_next_roots_45
ldr_vi root0, r_ptr0, 16
.endm
.macro load_next_roots_67
ldr_vi root0, r_ptr1, (6*16)
ldr_vo root0_tw, r_ptr1, (-6*16 + 1*16)
ldr_vo root1, r_ptr1, (-6*16 + 2*16)
ldr_vo root1_tw, r_ptr1, (-6*16 + 3*16)
ldr_vo root2, r_ptr1, (-6*16 + 4*16)
ldr_vo root2_tw, r_ptr1, (-6*16 + 5*16)
.endm
.macro transpose4 data
trn1 t0.4s, \data\()0.4s, \data\()1.4s
trn2 t1.4s, \data\()0.4s, \data\()1.4s
trn1 t2.4s, \data\()2.4s, \data\()3.4s
trn2 t3.4s, \data\()2.4s, \data\()3.4s
trn2 \data\()2.2d, t0.2d, t2.2d
trn2 \data\()3.2d, t1.2d, t3.2d
trn1 \data\()0.2d, t0.2d, t2.2d
trn1 \data\()1.2d, t1.2d, t3.2d
.endm
.macro transpose_single data_out, data_in
trn1 \data_out\()0.4s, \data_in\()0.4s, \data_in\()1.4s
trn2 \data_out\()1.4s, \data_in\()0.4s, \data_in\()1.4s
trn1 \data_out\()2.4s, \data_in\()2.4s, \data_in\()3.4s
trn2 \data_out\()3.4s, \data_in\()2.4s, \data_in\()3.4s
.endm
.macro vext gpr_out, vec_in, lane
umov \gpr_out\(), \vec_in\().d[\lane]
.endm
.macro vec_to_scalar_matrix out, in
vext \out\()_00, \in\()0, 0
vext \out\()_01, \in\()0, 1
vext \out\()_10, \in\()1, 0
vext \out\()_11, \in\()1, 1
vext \out\()_20, \in\()2, 0
vext \out\()_21, \in\()2, 1
vext \out\()_30, \in\()3, 0
vext \out\()_31, \in\()3, 1
.endm
.macro store_scalar_matrix_with_inc x, addr, inc
str \x\()t_00, [\addr], #( \inc)
str \x\()t_01, [\addr, #(-\inc + 8*1)]
str \x\()t_10, [\addr, #(-\inc + 8*2)]
str \x\()t_11, [\addr, #(-\inc + 8*3)]
str \x\()t_20, [\addr, #(-\inc + 8*4)]
str \x\()t_21, [\addr, #(-\inc + 8*5)]
str \x\()t_30, [\addr, #(-\inc + 8*6)]
str \x\()t_31, [\addr, #(-\inc + 8*7)]
.endm
.macro save_gprs // @slothy:no-unfold
sub sp, sp, #(16*6)
stp x19, x20, [sp, #16*0]
stp x19, x20, [sp, #16*0]
stp x21, x22, [sp, #16*1]
stp x23, x24, [sp, #16*2]
stp x25, x26, [sp, #16*3]
stp x27, x28, [sp, #16*4]
str x29, [sp, #16*5]
.endm
.macro restore_gprs // @slothy:no-unfold
ldp x19, x20, [sp, #16*0]
ldp x21, x22, [sp, #16*1]
ldp x23, x24, [sp, #16*2]
ldp x25, x26, [sp, #16*3]
ldp x27, x28, [sp, #16*4]
ldr x29, [sp, #16*5]
add sp, sp, #(16*6)
.endm
.macro save_vregs // @slothy:no-unfold
sub sp, sp, #(16*4)
stp d8, d9, [sp, #16*0]
stp d10, d11, [sp, #16*1]
stp d12, d13, [sp, #16*2]
stp d14, d15, [sp, #16*3]
.endm
.macro restore_vregs // @slothy:no-unfold
ldp d8, d9, [sp, #16*0]
ldp d10, d11, [sp, #16*1]
ldp d12, d13, [sp, #16*2]
ldp d14, d15, [sp, #16*3]
add sp, sp, #(16*4)
.endm
#define STACK_SIZE 16
#define STACK0 0
.macro restore a, loc // @slothy:no-unfold
ldr \a, [sp, #\loc\()]
.endm
.macro save loc, a // @slothy:no-unfold
str \a, [sp, #\loc\()]
.endm
.macro push_stack // @slothy:no-unfold
save_gprs
save_vregs
sub sp, sp, #STACK_SIZE
.endm
.macro pop_stack // @slothy:no-unfold
add sp, sp, #STACK_SIZE
restore_vregs
restore_gprs
.endm
.data
.p2align 4
roots:
#include "ntt_kyber_123_45_67_twiddles.s"
.text
.global ntt_kyber_123_4567_scalar_store
.global _ntt_kyber_123_4567_scalar_store
.p2align 4
const_addr: .short 3329
.short 20159
.short 0
.short 0
.short 0
.short 0
.short 0
.short 0
ntt_kyber_123_4567_scalar_store:
_ntt_kyber_123_4567_scalar_store:
push_stack
in .req x0
inp .req x1
count .req x2
r_ptr0 .req x3
r_ptr1 .req x4
xtmp .req x5
qform_v0 .req q0
qform_v1 .req q1
qform_v2 .req q2
qform_v3 .req q3
qform_v4 .req q4
qform_v5 .req q5
qform_v6 .req q6
qform_v7 .req q7
qform_v8 .req q8
qform_v9 .req q9
qform_v10 .req q10
qform_v11 .req q11
qform_v12 .req q12
qform_v13 .req q13
qform_v14 .req q14
qform_v15 .req q15
qform_v16 .req q16
qform_v17 .req q17
qform_v18 .req q18
qform_v19 .req q19
qform_v20 .req q20
qform_v21 .req q21
qform_v22 .req q22
qform_v23 .req q23
qform_v24 .req q24
qform_v25 .req q25
qform_v26 .req q26
qform_v27 .req q27
qform_v28 .req q28
qform_v29 .req q29
qform_v30 .req q30
qform_v31 .req q31
data0 .req v8
data1 .req v9
data2 .req v10
data3 .req v11
data4 .req v12
data5 .req v13
data6 .req v14
data7 .req v15
x_00 .req x10
x_01 .req x11
x_10 .req x12
x_11 .req x13
x_20 .req x14
x_21 .req x15
x_30 .req x16
x_31 .req x17
xt_00 .req x_00
xt_01 .req x_20
xt_10 .req x_10
xt_11 .req x_30
xt_20 .req x_01
xt_21 .req x_21
xt_30 .req x_11
xt_31 .req x_31
qform_data0 .req q8
qform_data1 .req q9
qform_data2 .req q10
qform_data3 .req q11
qform_data4 .req q12
qform_data5 .req q13
qform_data6 .req q14
qform_data7 .req q15
root0 .req v0
root1 .req v1
root2 .req v2
root0_tw .req v4
root1_tw .req v5
root2_tw .req v6
consts .req v7
qform_consts .req q7
qform_root0 .req q0
qform_root1 .req q1
qform_root2 .req q2
qform_root0_tw .req q4
qform_root1_tw .req q5
qform_root2_tw .req q6
tmp .req v24
t0 .req v25
t1 .req v26
t2 .req v27
t3 .req v28
ASM_LOAD(r_ptr0, roots)
ASM_LOAD(r_ptr1, roots_l56)
ASM_LOAD(xtmp, const_addr)
ld1 {consts.8h}, [xtmp]
save STACK0, in
mov count, #4
load_roots_123
.p2align 2
layer123_start:
ldr_vo data0, in, 0
ldr_vo data1, in, (1*(512/8))
ldr_vo data2, in, (2*(512/8))
ldr_vo data3, in, (3*(512/8))
ldr_vo data4, in, (4*(512/8))
ldr_vo data5, in, (5*(512/8))
ldr_vo data6, in, (6*(512/8))
ldr_vo data7, in, (7*(512/8))
ct_butterfly data0, data4, root0, 0, 1
ct_butterfly data1, data5, root0, 0, 1
ct_butterfly data2, data6, root0, 0, 1
ct_butterfly data3, data7, root0, 0, 1
ct_butterfly data0, data2, root0, 2, 3
ct_butterfly data1, data3, root0, 2, 3
ct_butterfly data4, data6, root0, 4, 5
ct_butterfly data5, data7, root0, 4, 5
ct_butterfly data0, data1, root0, 6, 7
ct_butterfly data2, data3, root1, 0, 1
ct_butterfly data4, data5, root1, 2, 3
ct_butterfly data6, data7, root1, 4, 5
str_vi data0, in, (16)
str_vo data1, in, (-16 + 1*(512/8))
str_vo data2, in, (-16 + 2*(512/8))
str_vo data3, in, (-16 + 3*(512/8))
str_vo data4, in, (-16 + 4*(512/8))
str_vo data5, in, (-16 + 5*(512/8))
str_vo data6, in, (-16 + 6*(512/8))
str_vo data7, in, (-16 + 7*(512/8))
subs count, count, #1
cbnz count, layer123_start
restore inp, STACK0
mov count, #8
.p2align 2
layer4567_start:
ldr_vo data0, inp, (16*0)
ldr_vo data1, inp, (16*1)
ldr_vo data2, inp, (16*2)
ldr_vo data3, inp, (16*3)
load_next_roots_45
ct_butterfly data0, data2, root0, 0, 1
ct_butterfly data1, data3, root0, 0, 1
ct_butterfly data0, data1, root0, 2, 3
ct_butterfly data2, data3, root0, 4, 5
transpose4 data
load_next_roots_67
ct_butterfly_v data0, data2, root0, root0_tw
ct_butterfly_v data1, data3, root0, root0_tw
ct_butterfly_v data0, data1, root1, root1_tw
ct_butterfly_v data2, data3, root2, root2_tw
transpose_single t, data
barrett_reduce t0
barrett_reduce t1
barrett_reduce t2
barrett_reduce t3
vec_to_scalar_matrix x, t
store_scalar_matrix_with_inc x, inp, 16*4
subs count, count, #1
cbnz count, layer4567_start
pop_stack
ret