Commit faa57625 authored Aug 09, 2021 by Johan Almbladh Committed by Daniel Borkmann Aug 10, 2021

bpf, tests: Add more ALU64 BPF_MUL tests

This patch adds BPF_MUL tests for 64x32 and 64x64 multiply. Mainly
testing 32-bit JITs that implement ALU64 operations with two 32-bit
CPU registers per operand.

Signed-off-by: Johan Almbladh <johan.almbladh@anyfinetworks.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Link: https://lore.kernel.org/bpf/20210809091829.810076-8-johan.almbladh@anyfinetworks.com

parent 3b9890ef

lib/test_bpf.c

+48 −0

Original line number	Diff line number	Diff line
		@@ -3051,6 +3051,31 @@ static struct bpf_test tests[] = {
		{ },
		{ { 0, 2147483647 } },
		},
		{
		"ALU64_MUL_X: 64x64 multiply, low word",
		.u.insns_int = {
		BPF_LD_IMM64(R0, 0x0fedcba987654321LL),
		BPF_LD_IMM64(R1, 0x123456789abcdef0LL),
		BPF_ALU64_REG(BPF_MUL, R0, R1),
		BPF_EXIT_INSN(),
		},
		INTERNAL,
		{ },
		{ { 0, 0xe5618cf0 } }
		},
		{
		"ALU64_MUL_X: 64x64 multiply, high word",
		.u.insns_int = {
		BPF_LD_IMM64(R0, 0x0fedcba987654321LL),
		BPF_LD_IMM64(R1, 0x123456789abcdef0LL),
		BPF_ALU64_REG(BPF_MUL, R0, R1),
		BPF_ALU64_IMM(BPF_RSH, R0, 32),
		BPF_EXIT_INSN(),
		},
		INTERNAL,
		{ },
		{ { 0, 0x2236d88f } }
		},
		/* BPF_ALU \| BPF_MUL \| BPF_K */
		{
		"ALU_MUL_K: 2 * 3 = 6",
		@@ -3161,6 +3186,29 @@ static struct bpf_test tests[] = {
		{ },
		{ { 0, 0x1 } },
		},
		{
		"ALU64_MUL_K: 64x32 multiply, low word",
		.u.insns_int = {
		BPF_LD_IMM64(R0, 0x0123456789abcdefLL),
		BPF_ALU64_IMM(BPF_MUL, R0, 0x12345678),
		BPF_EXIT_INSN(),
		},
		INTERNAL,
		{ },
		{ { 0, 0xe242d208 } }
		},
		{
		"ALU64_MUL_K: 64x32 multiply, high word",
		.u.insns_int = {
		BPF_LD_IMM64(R0, 0x0123456789abcdefLL),
		BPF_ALU64_IMM(BPF_MUL, R0, 0x12345678),
		BPF_ALU64_IMM(BPF_RSH, R0, 32),
		BPF_EXIT_INSN(),
		},
		INTERNAL,
		{ },
		{ { 0, 0xc28f5c28 } }
		},
		/* BPF_ALU \| BPF_DIV \| BPF_X */
		{
		"ALU_DIV_X: 6 / 2 = 3",