Signed-off-by: Richard Henderson <r...@twiddle.net> --- target/s390x/helper.h | 1 + target/s390x/mem_helper.c | 41 +++++++++++++++++++++++++++++++++++++++++ target/s390x/translate.c | 13 +++++++++++++ target/s390x/insn-data.def | 2 ++ 4 files changed, 57 insertions(+)
diff --git a/target/s390x/helper.h b/target/s390x/helper.h index a2e5b9b..32314e0 100644 --- a/target/s390x/helper.h +++ b/target/s390x/helper.h @@ -13,6 +13,7 @@ DEF_HELPER_FLAGS_3(divu32, TCG_CALL_NO_WG, i64, env, i64, i64) DEF_HELPER_FLAGS_3(divs64, TCG_CALL_NO_WG, s64, env, s64, s64) DEF_HELPER_FLAGS_4(divu64, TCG_CALL_NO_WG, i64, env, i64, i64, i64) DEF_HELPER_3(srst, void, env, i32, i32) +DEF_HELPER_3(srstu, void, env, i32, i32) DEF_HELPER_4(clst, i64, env, i64, i64, i64) DEF_HELPER_FLAGS_4(mvn, TCG_CALL_NO_WG, void, env, i32, i64, i64) DEF_HELPER_FLAGS_4(mvo, TCG_CALL_NO_WG, void, env, i32, i64, i64) diff --git a/target/s390x/mem_helper.c b/target/s390x/mem_helper.c index 74b48aa..e3db68d 100644 --- a/target/s390x/mem_helper.c +++ b/target/s390x/mem_helper.c @@ -576,6 +576,47 @@ void HELPER(srst)(CPUS390XState *env, uint32_t r1, uint32_t r2) set_address(env, r2, str + len); } +void HELPER(srstu)(CPUS390XState *env, uint32_t r1, uint32_t r2) +{ + uintptr_t ra = GETPC(); + uint32_t len; + uint16_t v, c = env->regs[0]; + uint64_t end, str, adj_end; + + /* Bits 32-47 of R0 must be zero. */ + if (env->regs[0] & 0xffff0000u) { + cpu_restore_state(ENV_GET_CPU(env), ra); + program_interrupt(env, PGM_SPECIFICATION, 6); + } + + str = get_address(env, r2); + end = get_address(env, r1); + + /* If the LSB of the two addresses differ, use one extra byte. */ + adj_end = end + ((str ^ end) & 1); + + /* Lest we fail to service interrupts in a timely manner, limit the + amount of work we're willing to do. For now, let's cap at 8k. */ + for (len = 0; len < 0x2000; len += 2) { + if (str + len == adj_end) { + /* End of input found. */ + env->cc_op = 2; + return; + } + v = cpu_lduw_data_ra(env, str + len, ra); + if (v == c) { + /* Character found. Set R1 to the location; R2 is unmodified. */ + env->cc_op = 1; + set_address(env, r1, str + len); + return; + } + } + + /* CPU-determined bytes processed. Advance R2 to next byte to process. */ + env->cc_op = 3; + set_address(env, r2, str + len); +} + /* unsigned string compare (c is string terminator) */ uint64_t HELPER(clst)(CPUS390XState *env, uint64_t c, uint64_t s1, uint64_t s2) { diff --git a/target/s390x/translate.c b/target/s390x/translate.c index b887843..09b77ea 100644 --- a/target/s390x/translate.c +++ b/target/s390x/translate.c @@ -4291,6 +4291,19 @@ static ExitStatus op_srst(DisasContext *s, DisasOps *o) return NO_EXIT; } +static ExitStatus op_srstu(DisasContext *s, DisasOps *o) +{ + TCGv_i32 r1 = tcg_const_i32(get_field(s->fields, r1)); + TCGv_i32 r2 = tcg_const_i32(get_field(s->fields, r2)); + + gen_helper_srstu(cpu_env, r1, r2); + + tcg_temp_free_i32(r1); + tcg_temp_free_i32(r2); + set_cc_static(s); + return NO_EXIT; +} + static ExitStatus op_sub(DisasContext *s, DisasOps *o) { tcg_gen_sub_i64(o->out, o->in1, o->in2); diff --git a/target/s390x/insn-data.def b/target/s390x/insn-data.def index bc6ff01..1d34df03 100644 --- a/target/s390x/insn-data.def +++ b/target/s390x/insn-data.def @@ -737,6 +737,8 @@ /* SEARCH STRING */ C(0xb25e, SRST, RRE, Z, 0, 0, 0, 0, srst, 0) +/* SEARCH STRING UNICODE */ + C(0xb9be, SRSTU, RRE, ETF3, 0, 0, 0, 0, srstu, 0) /* SET ACCESS */ C(0xb24e, SAR, RRE, Z, 0, r2_o, 0, 0, sar, 0) -- 2.9.4