From: Adhemerval Zanella <adhemerval.zanella@linaro.org>
To: libc-alpha@sourceware.org
Subject: [PATCH 4/7] x86: Add SSSE3 optimized chacha20
Date: Wed, 13 Apr 2022 17:23:58 -0300 [thread overview]
Message-ID: <20220413202401.408267-5-adhemerval.zanella@linaro.org> (raw)
In-Reply-To: <20220413202401.408267-1-adhemerval.zanella@linaro.org>
It adds vectorized ChaCha20 implementation based on libgcrypt
cipher/chacha20-amd64-ssse3.S. It is used only if SSSE3 is supported
and enable by the architecture.
On a Ryzen 9 5900X it shows the following improvements (using
formatted bench-arc4random data):
GENERIC
Function MB/s
--------------------------------------------------
arc4random [single-thread] 375.06
arc4random_buf(0) [single-thread] 498.50
arc4random_buf(16) [single-thread] 576.86
arc4random_buf(32) [single-thread] 615.76
arc4random_buf(64) [single-thread] 633.97
--------------------------------------------------
arc4random [multi-thread] 359.86
arc4random_buf(0) [multi-thread] 479.27
arc4random_buf(16) [multi-thread] 543.65
arc4random_buf(32) [multi-thread] 581.98
arc4random_buf(64) [multi-thread] 603.01
--------------------------------------------------
SSSE3:
Function MB/s
--------------------------------------------------
arc4random [single-thread] 576.55
arc4random_buf(0) [single-thread] 961.77
arc4random_buf(16) [single-thread] 1309.38
arc4random_buf(32) [single-thread] 1558.69
arc4random_buf(64) [single-thread] 1728.54
--------------------------------------------------
arc4random [multi-thread] 589.52
arc4random_buf(0) [multi-thread] 967.39
arc4random_buf(16) [multi-thread] 1319.27
arc4random_buf(32) [multi-thread] 1552.96
arc4random_buf(64) [multi-thread] 1734.27
--------------------------------------------------
Checked on x86_64-linux-gnu.
---
LICENSES | 20 ++
sysdeps/generic/chacha20_arch.h | 24 +++
sysdeps/x86_64/Makefile | 6 +
sysdeps/x86_64/chacha20-ssse3.S | 330 ++++++++++++++++++++++++++++++++
sysdeps/x86_64/chacha20_arch.h | 42 ++++
5 files changed, 422 insertions(+)
create mode 100644 sysdeps/generic/chacha20_arch.h
create mode 100644 sysdeps/x86_64/chacha20-ssse3.S
create mode 100644 sysdeps/x86_64/chacha20_arch.h
diff --git a/LICENSES b/LICENSES
index 530893b1dc..2563abd9e2 100644
--- a/LICENSES
+++ b/LICENSES
@@ -389,3 +389,23 @@ Copyright 2001 by Stephen L. Moshier <moshier@na-net.ornl.gov>
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, see
<https://www.gnu.org/licenses/>. */
+\f
+sysdeps/x86_64/chacha20-ssse3.S import code from libgcrypt, with the
+following notices:
+
+Copyright (C) 2017-2019 Jussi Kivilinna <jussi.kivilinna@iki.fi>
+
+This file is part of Libgcrypt.
+
+Libgcrypt is free software; you can redistribute it and/or modify
+it under the terms of the GNU Lesser General Public License as
+published by the Free Software Foundation; either version 2.1 of
+the License, or (at your option) any later version.
+
+Libgcrypt is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+GNU Lesser General Public License for more details.
+
+You should have received a copy of the GNU Lesser General Public
+License along with this program; if not, see <http://www.gnu.org/licenses/>.
diff --git a/sysdeps/generic/chacha20_arch.h b/sysdeps/generic/chacha20_arch.h
new file mode 100644
index 0000000000..d7200ac583
--- /dev/null
+++ b/sysdeps/generic/chacha20_arch.h
@@ -0,0 +1,24 @@
+/* Chacha20 implementation, generic interface.
+ Copyright (C) 2022 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, see
+ <http://www.gnu.org/licenses/>. */
+
+static inline void
+chacha20_crypt (struct chacha20_state *state, uint8_t *dst,
+ const uint8_t *src, size_t bytes)
+{
+ chacha20_crypt_generic (state, dst, src, bytes);
+}
diff --git a/sysdeps/x86_64/Makefile b/sysdeps/x86_64/Makefile
index 79365aff2a..f43b6a1180 100644
--- a/sysdeps/x86_64/Makefile
+++ b/sysdeps/x86_64/Makefile
@@ -5,6 +5,12 @@ ifeq ($(subdir),csu)
gen-as-const-headers += link-defines.sym
endif
+ifeq ($(subdir),stdlib)
+sysdep_routines += \
+ chacha20-ssse3 \
+ # sysdep_routines
+endif
+
ifeq ($(subdir),gmon)
sysdep_routines += _mcount
# We cannot compile _mcount.S with -pg because that would create
diff --git a/sysdeps/x86_64/chacha20-ssse3.S b/sysdeps/x86_64/chacha20-ssse3.S
new file mode 100644
index 0000000000..f221daf634
--- /dev/null
+++ b/sysdeps/x86_64/chacha20-ssse3.S
@@ -0,0 +1,330 @@
+/* Optimized SSSE3 implementation of ChaCha20 cipher.
+ Copyright (C) 2022 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, see
+ <https://www.gnu.org/licenses/>. */
+
+/* Based on D. J. Bernstein reference implementation at
+ http://cr.yp.to/chacha.html:
+
+ chacha-regs.c version 20080118
+ D. J. Bernstein
+ Public domain. */
+
+#include <sysdep.h>
+
+#ifdef PIC
+# define rRIP (%rip)
+#else
+# define rRIP
+#endif
+
+/* register macros */
+#define INPUT %rdi
+#define DST %rsi
+#define SRC %rdx
+#define NBLKS %rcx
+#define ROUND %eax
+
+/* stack structure */
+#define STACK_VEC_X12 (16)
+#define STACK_VEC_X13 (16 + STACK_VEC_X12)
+#define STACK_TMP (16 + STACK_VEC_X13)
+#define STACK_TMP1 (16 + STACK_TMP)
+#define STACK_TMP2 (16 + STACK_TMP1)
+
+#define STACK_MAX (16 + STACK_TMP2)
+
+/* vector registers */
+#define X0 %xmm0
+#define X1 %xmm1
+#define X2 %xmm2
+#define X3 %xmm3
+#define X4 %xmm4
+#define X5 %xmm5
+#define X6 %xmm6
+#define X7 %xmm7
+#define X8 %xmm8
+#define X9 %xmm9
+#define X10 %xmm10
+#define X11 %xmm11
+#define X12 %xmm12
+#define X13 %xmm13
+#define X14 %xmm14
+#define X15 %xmm15
+
+/**********************************************************************
+ helper macros
+ **********************************************************************/
+
+/* 4x4 32-bit integer matrix transpose */
+#define transpose_4x4(x0, x1, x2, x3, t1, t2, t3) \
+ movdqa x0, t2; \
+ punpckhdq x1, t2; \
+ punpckldq x1, x0; \
+ \
+ movdqa x2, t1; \
+ punpckldq x3, t1; \
+ punpckhdq x3, x2; \
+ \
+ movdqa x0, x1; \
+ punpckhqdq t1, x1; \
+ punpcklqdq t1, x0; \
+ \
+ movdqa t2, x3; \
+ punpckhqdq x2, x3; \
+ punpcklqdq x2, t2; \
+ movdqa t2, x2;
+
+/* fill xmm register with 32-bit value from memory */
+#define pbroadcastd(mem32, xreg) \
+ movd mem32, xreg; \
+ pshufd $0, xreg, xreg;
+
+/* xor with unaligned memory operand */
+#define pxor_u(umem128, xreg, t) \
+ movdqu umem128, t; \
+ pxor t, xreg;
+
+/* xor register with unaligned src and save to unaligned dst */
+#define xor_src_dst(dst, src, offset, xreg, t) \
+ pxor_u(offset(src), xreg, t); \
+ movdqu xreg, offset(dst);
+
+#define clear(x) pxor x,x;
+
+/**********************************************************************
+ 4-way chacha20
+ **********************************************************************/
+
+#define ROTATE2(v1,v2,c,tmp1,tmp2) \
+ movdqa v1, tmp1; \
+ movdqa v2, tmp2; \
+ psrld $(32 - (c)), v1; \
+ pslld $(c), tmp1; \
+ paddb tmp1, v1; \
+ psrld $(32 - (c)), v2; \
+ pslld $(c), tmp2; \
+ paddb tmp2, v2;
+
+#define ROTATE_SHUF_2(v1,v2,shuf) \
+ pshufb shuf, v1; \
+ pshufb shuf, v2;
+
+#define XOR(ds,s) \
+ pxor s, ds;
+
+#define PLUS(ds,s) \
+ paddd s, ds;
+
+#define QUARTERROUND2(a1,b1,c1,d1,a2,b2,c2,d2,ign,tmp1,tmp2,\
+ interleave_op1,interleave_op2) \
+ movdqa L(shuf_rol16) rRIP, tmp1; \
+ interleave_op1; \
+ PLUS(a1,b1); PLUS(a2,b2); XOR(d1,a1); XOR(d2,a2); \
+ ROTATE_SHUF_2(d1, d2, tmp1); \
+ PLUS(c1,d1); PLUS(c2,d2); XOR(b1,c1); XOR(b2,c2); \
+ ROTATE2(b1, b2, 12, tmp1, tmp2); \
+ movdqa L(shuf_rol8) rRIP, tmp1; \
+ interleave_op2; \
+ PLUS(a1,b1); PLUS(a2,b2); XOR(d1,a1); XOR(d2,a2); \
+ ROTATE_SHUF_2(d1, d2, tmp1); \
+ PLUS(c1,d1); PLUS(c2,d2); XOR(b1,c1); XOR(b2,c2); \
+ ROTATE2(b1, b2, 7, tmp1, tmp2);
+
+ .text
+
+chacha20_data:
+ .align 16
+L(shuf_rol16):
+ .byte 2,3,0,1,6,7,4,5,10,11,8,9,14,15,12,13
+L(shuf_rol8):
+ .byte 3,0,1,2,7,4,5,6,11,8,9,10,15,12,13,14
+L(counter1):
+ .long 1,0,0,0
+L(inc_counter):
+ .long 0,1,2,3
+L(unsigned_cmp):
+ .long 0x80000000,0x80000000,0x80000000,0x80000000
+
+ENTRY (__chacha20_ssse3_blocks8)
+ /* input:
+ * %rdi: input
+ * %rsi: dst
+ * %rdx: src
+ * %rcx: nblks (multiple of 4)
+ */
+
+ pushq %rbp;
+ cfi_adjust_cfa_offset(8);
+ cfi_rel_offset(rbp, 0)
+ movq %rsp, %rbp;
+ cfi_def_cfa_register(%rbp);
+
+ subq $STACK_MAX, %rsp;
+ andq $~15, %rsp;
+
+L(loop4):
+ mov $20, ROUND;
+
+ /* Construct counter vectors X12 and X13 */
+ movdqa L(inc_counter) rRIP, X0;
+ movdqa L(unsigned_cmp) rRIP, X2;
+ pbroadcastd((12 * 4)(INPUT), X12);
+ pbroadcastd((13 * 4)(INPUT), X13);
+ paddd X0, X12;
+ movdqa X12, X1;
+ pxor X2, X0;
+ pxor X2, X1;
+ pcmpgtd X1, X0;
+ psubd X0, X13;
+ movdqa X12, (STACK_VEC_X12)(%rsp);
+ movdqa X13, (STACK_VEC_X13)(%rsp);
+
+ /* Load vectors */
+ pbroadcastd((0 * 4)(INPUT), X0);
+ pbroadcastd((1 * 4)(INPUT), X1);
+ pbroadcastd((2 * 4)(INPUT), X2);
+ pbroadcastd((3 * 4)(INPUT), X3);
+ pbroadcastd((4 * 4)(INPUT), X4);
+ pbroadcastd((5 * 4)(INPUT), X5);
+ pbroadcastd((6 * 4)(INPUT), X6);
+ pbroadcastd((7 * 4)(INPUT), X7);
+ pbroadcastd((8 * 4)(INPUT), X8);
+ pbroadcastd((9 * 4)(INPUT), X9);
+ pbroadcastd((10 * 4)(INPUT), X10);
+ pbroadcastd((11 * 4)(INPUT), X11);
+ pbroadcastd((14 * 4)(INPUT), X14);
+ pbroadcastd((15 * 4)(INPUT), X15);
+ movdqa X11, (STACK_TMP)(%rsp);
+ movdqa X15, (STACK_TMP1)(%rsp);
+
+L(round2_4):
+ QUARTERROUND2(X0, X4, X8, X12, X1, X5, X9, X13, tmp:=,X11,X15,,)
+ movdqa (STACK_TMP)(%rsp), X11;
+ movdqa (STACK_TMP1)(%rsp), X15;
+ movdqa X8, (STACK_TMP)(%rsp);
+ movdqa X9, (STACK_TMP1)(%rsp);
+ QUARTERROUND2(X2, X6, X10, X14, X3, X7, X11, X15, tmp:=,X8,X9,,)
+ QUARTERROUND2(X0, X5, X10, X15, X1, X6, X11, X12, tmp:=,X8,X9,,)
+ movdqa (STACK_TMP)(%rsp), X8;
+ movdqa (STACK_TMP1)(%rsp), X9;
+ movdqa X11, (STACK_TMP)(%rsp);
+ movdqa X15, (STACK_TMP1)(%rsp);
+ QUARTERROUND2(X2, X7, X8, X13, X3, X4, X9, X14, tmp:=,X11,X15,,)
+ sub $2, ROUND;
+ jnz .Lround2_4;
+
+ /* tmp := X15 */
+ movdqa (STACK_TMP)(%rsp), X11;
+ pbroadcastd((0 * 4)(INPUT), X15);
+ PLUS(X0, X15);
+ pbroadcastd((1 * 4)(INPUT), X15);
+ PLUS(X1, X15);
+ pbroadcastd((2 * 4)(INPUT), X15);
+ PLUS(X2, X15);
+ pbroadcastd((3 * 4)(INPUT), X15);
+ PLUS(X3, X15);
+ pbroadcastd((4 * 4)(INPUT), X15);
+ PLUS(X4, X15);
+ pbroadcastd((5 * 4)(INPUT), X15);
+ PLUS(X5, X15);
+ pbroadcastd((6 * 4)(INPUT), X15);
+ PLUS(X6, X15);
+ pbroadcastd((7 * 4)(INPUT), X15);
+ PLUS(X7, X15);
+ pbroadcastd((8 * 4)(INPUT), X15);
+ PLUS(X8, X15);
+ pbroadcastd((9 * 4)(INPUT), X15);
+ PLUS(X9, X15);
+ pbroadcastd((10 * 4)(INPUT), X15);
+ PLUS(X10, X15);
+ pbroadcastd((11 * 4)(INPUT), X15);
+ PLUS(X11, X15);
+ movdqa (STACK_VEC_X12)(%rsp), X15;
+ PLUS(X12, X15);
+ movdqa (STACK_VEC_X13)(%rsp), X15;
+ PLUS(X13, X15);
+ movdqa X13, (STACK_TMP)(%rsp);
+ pbroadcastd((14 * 4)(INPUT), X15);
+ PLUS(X14, X15);
+ movdqa (STACK_TMP1)(%rsp), X15;
+ movdqa X14, (STACK_TMP1)(%rsp);
+ pbroadcastd((15 * 4)(INPUT), X13);
+ PLUS(X15, X13);
+ movdqa X15, (STACK_TMP2)(%rsp);
+
+ /* Update counter */
+ addq $4, (12 * 4)(INPUT);
+
+ transpose_4x4(X0, X1, X2, X3, X13, X14, X15);
+ xor_src_dst(DST, SRC, (64 * 0 + 16 * 0), X0, X15);
+ xor_src_dst(DST, SRC, (64 * 1 + 16 * 0), X1, X15);
+ xor_src_dst(DST, SRC, (64 * 2 + 16 * 0), X2, X15);
+ xor_src_dst(DST, SRC, (64 * 3 + 16 * 0), X3, X15);
+ transpose_4x4(X4, X5, X6, X7, X0, X1, X2);
+ movdqa (STACK_TMP)(%rsp), X13;
+ movdqa (STACK_TMP1)(%rsp), X14;
+ movdqa (STACK_TMP2)(%rsp), X15;
+ xor_src_dst(DST, SRC, (64 * 0 + 16 * 1), X4, X0);
+ xor_src_dst(DST, SRC, (64 * 1 + 16 * 1), X5, X0);
+ xor_src_dst(DST, SRC, (64 * 2 + 16 * 1), X6, X0);
+ xor_src_dst(DST, SRC, (64 * 3 + 16 * 1), X7, X0);
+ transpose_4x4(X8, X9, X10, X11, X0, X1, X2);
+ xor_src_dst(DST, SRC, (64 * 0 + 16 * 2), X8, X0);
+ xor_src_dst(DST, SRC, (64 * 1 + 16 * 2), X9, X0);
+ xor_src_dst(DST, SRC, (64 * 2 + 16 * 2), X10, X0);
+ xor_src_dst(DST, SRC, (64 * 3 + 16 * 2), X11, X0);
+ transpose_4x4(X12, X13, X14, X15, X0, X1, X2);
+ xor_src_dst(DST, SRC, (64 * 0 + 16 * 3), X12, X0);
+ xor_src_dst(DST, SRC, (64 * 1 + 16 * 3), X13, X0);
+ xor_src_dst(DST, SRC, (64 * 2 + 16 * 3), X14, X0);
+ xor_src_dst(DST, SRC, (64 * 3 + 16 * 3), X15, X0);
+
+ sub $4, NBLKS;
+ lea (4 * 64)(DST), DST;
+ lea (4 * 64)(SRC), SRC;
+ jnz L(loop4);
+
+ /* clear the used vector registers and stack */
+ clear(X0);
+ movdqa X0, (STACK_VEC_X12)(%rsp);
+ movdqa X0, (STACK_VEC_X13)(%rsp);
+ movdqa X0, (STACK_TMP)(%rsp);
+ movdqa X0, (STACK_TMP1)(%rsp);
+ movdqa X0, (STACK_TMP2)(%rsp);
+ clear(X1);
+ clear(X2);
+ clear(X3);
+ clear(X4);
+ clear(X5);
+ clear(X6);
+ clear(X7);
+ clear(X8);
+ clear(X9);
+ clear(X10);
+ clear(X11);
+ clear(X12);
+ clear(X13);
+ clear(X14);
+ clear(X15);
+
+ /* eax zeroed by round loop. */
+ leave;
+ cfi_adjust_cfa_offset(-8)
+ cfi_def_cfa_register(%rsp);
+ ret;
+ int3;
+END (__chacha20_ssse3_blocks8)
diff --git a/sysdeps/x86_64/chacha20_arch.h b/sysdeps/x86_64/chacha20_arch.h
new file mode 100644
index 0000000000..37a4fdfb1f
--- /dev/null
+++ b/sysdeps/x86_64/chacha20_arch.h
@@ -0,0 +1,42 @@
+/* Chacha20 implementation, used on arc4random.
+ Copyright (C) 2022 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, see
+ <http://www.gnu.org/licenses/>. */
+
+#include <ldsodefs.h>
+#include <cpu-features.h>
+#include <sys/param.h>
+
+unsigned int __chacha20_ssse3_blocks8 (uint32_t *state, uint8_t *dst,
+ const uint8_t *src, size_t nblks);
+
+static inline void
+chacha20_crypt (struct chacha20_state *state, uint8_t *dst, const uint8_t *src,
+ size_t bytes)
+{
+ if (CPU_FEATURE_USABLE_P (cpu_features, SSSE3) && bytes >= CHACHA20_BLOCK_SIZE * 4)
+ {
+ size_t nblocks = bytes / CHACHA20_BLOCK_SIZE;
+ nblocks -= nblocks % 4;
+ __chacha20_ssse3_blocks8 (state->ctx, dst, src, nblocks);
+ bytes -= nblocks * CHACHA20_BLOCK_SIZE;
+ dst += nblocks * CHACHA20_BLOCK_SIZE;
+ src += nblocks * CHACHA20_BLOCK_SIZE;
+ }
+
+ if (bytes > 0)
+ chacha20_crypt_generic (state, dst, src, bytes);
+}
--
2.32.0
next prev parent reply other threads:[~2022-04-13 20:24 UTC|newest]
Thread overview: 34+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-04-13 20:23 [PATCH 0/7] Add arc4random support Adhemerval Zanella
2022-04-13 20:23 ` [PATCH 1/7] stdlib: Add arc4random, arc4random_buf, and arc4random_uniform (BZ #4417) Adhemerval Zanella
2022-04-13 20:23 ` [PATCH 2/7] stdlib: Add arc4random tests Adhemerval Zanella
2022-04-14 18:01 ` Noah Goldstein
2022-04-13 20:23 ` [PATCH 3/7] benchtests: Add arc4random benchtest Adhemerval Zanella
2022-04-14 19:17 ` Noah Goldstein
2022-04-14 19:48 ` Adhemerval Zanella
2022-04-14 20:33 ` Noah Goldstein
2022-04-14 20:48 ` Adhemerval Zanella
2022-04-13 20:23 ` Adhemerval Zanella [this message]
2022-04-13 23:12 ` [PATCH 4/7] x86: Add SSSE3 optimized chacha20 Noah Goldstein
2022-04-14 17:03 ` Adhemerval Zanella
2022-04-14 17:10 ` Noah Goldstein
2022-04-14 17:18 ` Adhemerval Zanella
2022-04-14 17:22 ` Noah Goldstein
2022-04-14 18:25 ` Adhemerval Zanella
2022-04-14 17:17 ` Noah Goldstein
2022-04-14 18:11 ` Adhemerval Zanella
2022-04-14 19:25 ` Noah Goldstein
2022-04-14 19:40 ` Adhemerval Zanella
2022-04-13 20:23 ` [PATCH 5/7] x86: Add AVX2 " Adhemerval Zanella
2022-04-13 23:04 ` Noah Goldstein
2022-04-14 17:16 ` Adhemerval Zanella
2022-04-14 17:20 ` Noah Goldstein
2022-04-14 18:12 ` Adhemerval Zanella
2022-04-13 20:24 ` [PATCH 6/7] aarch64: Add " Adhemerval Zanella
2022-04-13 20:24 ` [PATCH 7/7] powerpc64: " Adhemerval Zanella
2022-04-14 7:36 ` [PATCH 0/7] Add arc4random support Yann Droneaud
2022-04-14 18:39 ` Adhemerval Zanella
2022-04-14 18:43 ` Noah Goldstein
2022-04-15 10:22 ` Yann Droneaud
2022-04-14 11:49 ` Cristian Rodríguez
2022-04-14 19:26 ` Adhemerval Zanella
2022-04-14 20:36 ` Noah Goldstein
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