diff options
| -rw-r--r-- | target/s390x/mem_helper.c | 17 |
1 files changed, 13 insertions, 4 deletions
diff --git a/target/s390x/mem_helper.c b/target/s390x/mem_helper.c index 271b1db664..570e995b77 100644 --- a/target/s390x/mem_helper.c +++ b/target/s390x/mem_helper.c @@ -389,17 +389,26 @@ uint32_t HELPER(xc)(CPUS390XState *env, uint32_t l, uint64_t dest, static uint32_t do_helper_oc(CPUS390XState *env, uint32_t l, uint64_t dest, uint64_t src, uintptr_t ra) { + const int mmu_idx = cpu_mmu_index(env, false); + S390Access srca1, srca2, desta; uint32_t i; uint8_t c = 0; HELPER_LOG("%s l %d dest %" PRIx64 " src %" PRIx64 "\n", __func__, l, dest, src); - for (i = 0; i <= l; i++) { - uint8_t x = cpu_ldub_data_ra(env, src + i, ra); - x |= cpu_ldub_data_ra(env, dest + i, ra); + /* OC always processes one more byte than specified - maximum is 256 */ + l++; + + srca1 = access_prepare(env, src, l, MMU_DATA_LOAD, mmu_idx, ra); + srca2 = access_prepare(env, dest, l, MMU_DATA_LOAD, mmu_idx, ra); + desta = access_prepare(env, dest, l, MMU_DATA_STORE, mmu_idx, ra); + for (i = 0; i < l; i++) { + const uint8_t x = access_get_byte(env, &srca1, i, ra) | + access_get_byte(env, &srca2, i, ra); + c |= x; - cpu_stb_data_ra(env, dest + i, x, ra); + access_set_byte(env, &desta, i, x, ra); } return c != 0; } |