summaryrefslogtreecommitdiffstats
diff options
context:
space:
mode:
authorJohan Almbladh <johan.almbladh@anyfinetworks.com>2021-08-09 11:18:22 +0200
committerDaniel Borkmann <daniel@iogearbox.net>2021-08-10 11:33:12 +0200
commitfaa576253d5fe757f0c573ef7e183b3416c58dae (patch)
treeea3588723a780f4726412c584152a1d352da882c
parentbpf, tests: Add more BPF_LSH/RSH/ARSH tests for ALU64 (diff)
downloadlinux-faa576253d5fe757f0c573ef7e183b3416c58dae.tar.xz
linux-faa576253d5fe757f0c573ef7e183b3416c58dae.zip
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
-rw-r--r--lib/test_bpf.c48
1 files changed, 48 insertions, 0 deletions
diff --git a/lib/test_bpf.c b/lib/test_bpf.c
index b95bed03ab1b..072f9c51bd9b 100644
--- a/lib/test_bpf.c
+++ b/lib/test_bpf.c
@@ -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",