diff options
| -rw-r--r-- | target/s390x/mem_helper.c | 66 |
1 files changed, 51 insertions, 15 deletions
diff --git a/target/s390x/mem_helper.c b/target/s390x/mem_helper.c index 3a77edc9fe..e35571e342 100644 --- a/target/s390x/mem_helper.c +++ b/target/s390x/mem_helper.c @@ -200,31 +200,30 @@ uint32_t HELPER(oc)(CPUS390XState *env, uint32_t l, uint64_t dest, } /* memmove */ -static void do_helper_mvc(CPUS390XState *env, uint32_t l, uint64_t dest, - uint64_t src, uintptr_t ra) +static uint32_t do_helper_mvc(CPUS390XState *env, uint32_t l, uint64_t dest, + uint64_t src, uintptr_t ra) { uint32_t i; HELPER_LOG("%s l %d dest %" PRIx64 " src %" PRIx64 "\n", __func__, l, dest, src); + /* mvc and memmove do not behave the same when areas overlap! */ /* mvc with source pointing to the byte after the destination is the same as memset with the first source byte */ if (dest == src + 1) { fast_memset(env, dest, cpu_ldub_data_ra(env, src, ra), l + 1, ra); - return; - } - - /* mvc and memmove do not behave the same when areas overlap! */ - if (dest < src || src + l < dest) { + } else if (dest < src || src + l < dest) { fast_memmove(env, dest, src, l + 1, ra); - return; + } else { + /* slow version with byte accesses which always work */ + for (i = 0; i <= l; i++) { + uint8_t x = cpu_ldub_data_ra(env, src + i, ra); + cpu_stb_data_ra(env, dest + i, x, ra); + } } - /* slow version with byte accesses which always work */ - for (i = 0; i <= l; i++) { - cpu_stb_data_ra(env, dest + i, cpu_ldub_data_ra(env, src + i, ra), ra); - } + return env->cc_op; } void HELPER(mvc)(CPUS390XState *env, uint32_t l, uint64_t dest, uint64_t src) @@ -692,8 +691,8 @@ void HELPER(unpk)(CPUS390XState *env, uint32_t len, uint64_t dest, } } -static void do_helper_tr(CPUS390XState *env, uint32_t len, uint64_t array, - uint64_t trans, uintptr_t ra) +static uint32_t do_helper_tr(CPUS390XState *env, uint32_t len, uint64_t array, + uint64_t trans, uintptr_t ra) { uint32_t i; @@ -702,12 +701,14 @@ static void do_helper_tr(CPUS390XState *env, uint32_t len, uint64_t array, uint8_t new_byte = cpu_ldub_data_ra(env, trans + byte, ra); cpu_stb_data_ra(env, array + i, new_byte, ra); } + + return env->cc_op; } void HELPER(tr)(CPUS390XState *env, uint32_t len, uint64_t array, uint64_t trans) { - return do_helper_tr(env, len, array, trans, GETPC()); + do_helper_tr(env, len, array, trans, GETPC()); } uint64_t HELPER(tre)(CPUS390XState *env, uint64_t array, @@ -1221,6 +1222,41 @@ void HELPER(ex)(CPUS390XState *env, uint32_t ilen, uint64_t r1, uint64_t addr) g_assert_not_reached(); } + /* The very most common cases can be sped up by avoiding a new TB. */ + if ((opc & 0xf0) == 0xd0) { + typedef uint32_t (*dx_helper)(CPUS390XState *, uint32_t, uint64_t, + uint64_t, uintptr_t); + static const dx_helper dx[16] = { + [0x2] = do_helper_mvc, + [0x4] = do_helper_nc, + [0x5] = do_helper_clc, + [0x6] = do_helper_oc, + [0x7] = do_helper_xc, + [0xc] = do_helper_tr, + [0xd] = do_helper_trt, + }; + dx_helper helper = dx[opc & 0xf]; + + if (helper) { + uint32_t l = extract64(insn, 48, 8); + uint32_t b1 = extract64(insn, 44, 4); + uint32_t d1 = extract64(insn, 32, 12); + uint32_t b2 = extract64(insn, 28, 4); + uint32_t d2 = extract64(insn, 16, 12); + uint64_t a1 = get_address(env, 0, b1, d1); + uint64_t a2 = get_address(env, 0, b2, d2); + + env->cc_op = helper(env, l, a1, a2, 0); + env->psw.addr += ilen; + return; + } + } else if (opc == 0x0a) { + env->int_svc_code = extract64(insn, 48, 8); + env->int_svc_ilen = ilen; + helper_exception(env, EXCP_SVC); + g_assert_not_reached(); + } + /* Record the insn we want to execute as well as the ilen to use during the execution of the target insn. This will also ensure that ex_value is non-zero, which flags that we are in a state |