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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
This commit is contained in:
Johan Almbladh 2021-08-09 11:18:22 +02:00 committed by Daniel Borkmann
parent 3b9890ef80
commit faa576253d
1 changed files with 48 additions and 0 deletions
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48
lib/test_bpf.c
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@ -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",