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From: Johan Almbladh <johan.almbladh@anyfinetworks.com>
To: ast@kernel.org, daniel@iogearbox.net, andrii@kernel.org
Cc: kafai@fb.com, songliubraving@fb.com, yhs@fb.com,
	john.fastabend@gmail.com, kpsingh@kernel.org,
	Tony.Ambardar@gmail.com, netdev@vger.kernel.org,
	bpf@vger.kernel.org,
	Johan Almbladh <johan.almbladh@anyfinetworks.com>
Subject: [RFC PATCH 05/14] bpf/tests: add more ALU32 tests for BPF_LSH/RSH/ARSH
Date: Mon, 26 Jul 2021 10:17:29 +0200	[thread overview]
Message-ID: <20210726081738.1833704-6-johan.almbladh@anyfinetworks.com> (raw)
In-Reply-To: <20210726081738.1833704-1-johan.almbladh@anyfinetworks.com>

This patch adds more tests of ALU32 shift operations BPF_LSH and BPF_RSH,
including the special case of a zero immediate. Also add corresponding
BPF_ARSH tests which were missing for ALU32.

Signed-off-by: Johan Almbladh <johan.almbladh@anyfinetworks.com>
---
 lib/test_bpf.c | 102 +++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 102 insertions(+)

diff --git a/lib/test_bpf.c b/lib/test_bpf.c
index 67e7de776c12..ef75dbf53ec2 100644
--- a/lib/test_bpf.c
+++ b/lib/test_bpf.c
@@ -4103,6 +4103,18 @@ static struct bpf_test tests[] = {
 		{ },
 		{ { 0, 0x80000000 } },
 	},
+	{
+		"ALU_LSH_X: 0x12345678 << 12 = 0x45678000",
+		.u.insns_int = {
+			BPF_ALU32_IMM(BPF_MOV, R0, 0x12345678),
+			BPF_ALU32_IMM(BPF_MOV, R1, 12),
+			BPF_ALU32_REG(BPF_LSH, R0, R1),
+			BPF_EXIT_INSN(),
+		},
+		INTERNAL,
+		{ },
+		{ { 0, 0x45678000 } }
+	},
 	{
 		"ALU64_LSH_X: 1 << 1 = 2",
 		.u.insns_int = {
@@ -4150,6 +4162,28 @@ static struct bpf_test tests[] = {
 		{ },
 		{ { 0, 0x80000000 } },
 	},
+	{
+		"ALU_LSH_K: 0x12345678 << 12 = 0x45678000",
+		.u.insns_int = {
+			BPF_ALU32_IMM(BPF_MOV, R0, 0x12345678),
+			BPF_ALU32_IMM(BPF_LSH, R0, 12),
+			BPF_EXIT_INSN(),
+		},
+		INTERNAL,
+		{ },
+		{ { 0, 0x45678000 } }
+	},
+	{
+		"ALU_LSH_K: 0x12345678 << 0 = 0x12345678",
+		.u.insns_int = {
+			BPF_ALU32_IMM(BPF_MOV, R0, 0x12345678),
+			BPF_ALU32_IMM(BPF_LSH, R0, 0),
+			BPF_EXIT_INSN(),
+		},
+		INTERNAL,
+		{ },
+		{ { 0, 0x12345678 } }
+	},
 	{
 		"ALU64_LSH_K: 1 << 1 = 2",
 		.u.insns_int = {
@@ -4197,6 +4231,18 @@ static struct bpf_test tests[] = {
 		{ },
 		{ { 0, 1 } },
 	},
+	{
+		"ALU_RSH_X: 0x12345678 >> 20 = 0x123",
+		.u.insns_int = {
+			BPF_ALU32_IMM(BPF_MOV, R0, 0x12345678),
+			BPF_ALU32_IMM(BPF_MOV, R1, 20),
+			BPF_ALU32_REG(BPF_RSH, R0, R1),
+			BPF_EXIT_INSN(),
+		},
+		INTERNAL,
+		{ },
+		{ { 0, 0x123 } }
+	},
 	{
 		"ALU64_RSH_X: 2 >> 1 = 1",
 		.u.insns_int = {
@@ -4244,6 +4290,28 @@ static struct bpf_test tests[] = {
 		{ },
 		{ { 0, 1 } },
 	},
+	{
+		"ALU_RSH_K: 0x12345678 >> 20 = 0x123",
+		.u.insns_int = {
+			BPF_ALU32_IMM(BPF_MOV, R0, 0x12345678),
+			BPF_ALU32_IMM(BPF_RSH, R0, 20),
+			BPF_EXIT_INSN(),
+		},
+		INTERNAL,
+		{ },
+		{ { 0, 0x123 } }
+	},
+	{
+		"ALU_RSH_K: 0x12345678 >> 0 = 0x12345678",
+		.u.insns_int = {
+			BPF_ALU32_IMM(BPF_MOV, R0, 0x12345678),
+			BPF_ALU32_IMM(BPF_RSH, R0, 0),
+			BPF_EXIT_INSN(),
+		},
+		INTERNAL,
+		{ },
+		{ { 0, 0x12345678 } }
+	},
 	{
 		"ALU64_RSH_K: 2 >> 1 = 1",
 		.u.insns_int = {
@@ -4267,6 +4335,18 @@ static struct bpf_test tests[] = {
 		{ { 0, 1 } },
 	},
 	/* BPF_ALU | BPF_ARSH | BPF_X */
+	{
+		"ALU32_ARSH_X: -1234 >> 7 = -10",
+		.u.insns_int = {
+			BPF_ALU32_IMM(BPF_MOV, R0, -1234),
+			BPF_ALU32_IMM(BPF_MOV, R1, 7),
+			BPF_ALU32_REG(BPF_ARSH, R0, R1),
+			BPF_EXIT_INSN(),
+		},
+		INTERNAL,
+		{ },
+		{ { 0, -10 } }
+	},
 	{
 		"ALU_ARSH_X: 0xff00ff0000000000 >> 40 = 0xffffffffffff00ff",
 		.u.insns_int = {
@@ -4280,6 +4360,28 @@ static struct bpf_test tests[] = {
 		{ { 0, 0xffff00ff } },
 	},
 	/* BPF_ALU | BPF_ARSH | BPF_K */
+	{
+		"ALU32_ARSH_K: -1234 >> 7 = -10",
+		.u.insns_int = {
+			BPF_ALU32_IMM(BPF_MOV, R0, -1234),
+			BPF_ALU32_IMM(BPF_ARSH, R0, 7),
+			BPF_EXIT_INSN(),
+		},
+		INTERNAL,
+		{ },
+		{ { 0, -10 } }
+	},
+	{
+		"ALU32_ARSH_K: -1234 >> 0 = -1234",
+		.u.insns_int = {
+			BPF_ALU32_IMM(BPF_MOV, R0, -1234),
+			BPF_ALU32_IMM(BPF_ARSH, R0, 0),
+			BPF_EXIT_INSN(),
+		},
+		INTERNAL,
+		{ },
+		{ { 0, -1234 } }
+	},
 	{
 		"ALU_ARSH_K: 0xff00ff0000000000 >> 40 = 0xffffffffffff00ff",
 		.u.insns_int = {
-- 
2.25.1


  parent reply	other threads:[~2021-07-26  8:18 UTC|newest]

Thread overview: 27+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-07-26  8:17 [RFC PATCH 00/14] bpf/tests: Extend the eBPF test suite Johan Almbladh
2021-07-26  8:17 ` [RFC PATCH 01/14] bpf/tests: add BPF_JMP32 test cases Johan Almbladh
2021-07-26  8:17 ` [RFC PATCH 02/14] bpf/tests: add BPF_MOV tests for zero and sign extension Johan Almbladh
2021-07-26  8:17 ` [RFC PATCH 03/14] bpf/tests: fix typos in test case descriptions Johan Almbladh
2021-07-26  8:17 ` [RFC PATCH 04/14] bpf/tests: add more tests of ALU32 and ALU64 bitwise operations Johan Almbladh
2021-07-26  8:17 ` Johan Almbladh [this message]
2021-07-26  8:17 ` [RFC PATCH 06/14] bpf/tests: add more BPF_LSH/RSH/ARSH tests for ALU64 Johan Almbladh
2021-07-26  8:17 ` [RFC PATCH 07/14] bpf/tests: add more ALU64 BPF_MUL tests Johan Almbladh
2021-07-26  8:17 ` [RFC PATCH 08/14] bpf/tests: add tests for ALU operations implemented with function calls Johan Almbladh
2021-07-26  8:17 ` [RFC PATCH 09/14] bpf/tests: add word-order tests for load/store of double words Johan Almbladh
2021-07-26  8:17 ` [RFC PATCH 10/14] bpf/tests: add branch conversion JIT test Johan Almbladh
2021-07-26  8:17 ` [RFC PATCH 11/14] bpf/tests: add test for 32-bit context pointer argument passing Johan Almbladh
2021-07-26  8:17 ` [RFC PATCH 12/14] bpf/tests: add tests for atomic operations Johan Almbladh
2021-07-26  8:17 ` [RFC PATCH 13/14] bpf/tests: add tests for BPF_CMPXCHG Johan Almbladh
2021-07-26  8:17 ` [RFC PATCH 14/14] bpf/tests: add tail call test suite Johan Almbladh
2021-07-26 22:53 ` [RFC PATCH 00/14] bpf/tests: Extend the eBPF " Andrii Nakryiko
2021-07-28  8:27   ` Daniel Borkmann
2021-07-28 12:15     ` Johan Almbladh
2021-07-28 16:47     ` [PATCH] bpf: Fix off-by-one in tail call count limiting Johan Almbladh
2021-07-28 19:13       ` Yonghong Song
2021-07-29 21:37         ` Johan Almbladh
2021-07-29 22:29           ` Andrii Nakryiko
2021-07-29 22:48             ` Andrii Nakryiko
2021-08-01  8:37               ` Johan Almbladh
2021-08-02 20:28                 ` Andrii Nakryiko
2021-08-05 14:37                   ` Johan Almbladh
2021-08-05 22:54                     ` Andrii Nakryiko

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