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| author | Aurelien Jarno <aurelien@aurel32.net> | 2017-06-01 00:01:11 +0200 |
|---|---|---|
| committer | Richard Henderson <rth@twiddle.net> | 2017-06-06 15:20:42 -0700 |
| commit | fdc0a7474aa271bdcf88dd63008fb10d8a4b4824 (patch) | |
| tree | dc0143bc5c73bd6203fea15b8d16b412a75a66ea | |
| parent | 256dab6fe8872a041823a18e78d7d7a86d0e9618 (diff) | |
| download | qemu-fdc0a7474aa271bdcf88dd63008fb10d8a4b4824.zip qemu-fdc0a7474aa271bdcf88dd63008fb10d8a4b4824.tar.gz qemu-fdc0a7474aa271bdcf88dd63008fb10d8a4b4824.tar.bz2 | |
target/s390x: implement MOVE WITH OFFSET
Reviewed-by: Richard Henderson <rth@twiddle.net>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
Message-Id: <20170531220129.27724-13-aurelien@aurel32.net>
Signed-off-by: Richard Henderson <rth@twiddle.net>
| -rw-r--r-- | target/s390x/helper.h | 1 | ||||
| -rw-r--r-- | target/s390x/insn-data.def | 4 | ||||
| -rw-r--r-- | target/s390x/mem_helper.c | 31 | ||||
| -rw-r--r-- | target/s390x/translate.c | 8 |
4 files changed, 44 insertions, 0 deletions
diff --git a/target/s390x/helper.h b/target/s390x/helper.h index 5780bb5..385ce9a 100644 --- a/target/s390x/helper.h +++ b/target/s390x/helper.h @@ -14,6 +14,7 @@ DEF_HELPER_FLAGS_4(divu64, TCG_CALL_NO_WG, i64, env, i64, i64, i64) DEF_HELPER_4(srst, i64, env, i64, i64, i64) 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) DEF_HELPER_FLAGS_4(mvpg, TCG_CALL_NO_WG, i32, env, i64, i64, i64) DEF_HELPER_4(mvst, i64, env, i64, i64, i64) DEF_HELPER_4(ex, void, env, i32, i64, i64) diff --git a/target/s390x/insn-data.def b/target/s390x/insn-data.def index cbb91bb..45aaf11 100644 --- a/target/s390x/insn-data.def +++ b/target/s390x/insn-data.def @@ -582,6 +582,10 @@ C(0xb254, MVPG, RRE, Z, r1_o, r2_o, 0, 0, mvpg, 0) /* MOVE STRING */ C(0xb255, MVST, RRE, Z, r1_o, r2_o, 0, 0, mvst, 0) +/* MOVE WITH OFFSET */ + /* Really format SS_b, but we pack both lengths into one argument + for the helper call, so we might as well leave one 8-bit field. */ + C(0xf100, MVO, SS_a, Z, la1, a2, 0, 0, mvo, 0) /* MULTIPLY */ C(0x1c00, MR, RR_a, Z, r1p1_32s, r2_32s, new, r1_D32, mul, 0) diff --git a/target/s390x/mem_helper.c b/target/s390x/mem_helper.c index f80b7a5..facac4b 100644 --- a/target/s390x/mem_helper.c +++ b/target/s390x/mem_helper.c @@ -256,6 +256,37 @@ void HELPER(mvn)(CPUS390XState *env, uint32_t l, uint64_t dest, uint64_t src) } } +/* move with offset */ +void HELPER(mvo)(CPUS390XState *env, uint32_t l, uint64_t dest, uint64_t src) +{ + uintptr_t ra = GETPC(); + int len_dest = l >> 4; + int len_src = l & 0xf; + uint8_t byte_dest, byte_src; + int i; + + src += len_src; + dest += len_dest; + + /* Handle rightmost byte */ + byte_src = cpu_ldub_data_ra(env, src, ra); + byte_dest = cpu_ldub_data_ra(env, dest, ra); + byte_dest = (byte_dest & 0x0f) | (byte_src << 4); + cpu_stb_data_ra(env, dest, byte_dest, ra); + + /* Process remaining bytes from right to left */ + for (i = 1; i <= len_dest; i++) { + byte_dest = byte_src >> 4; + if (len_src - i >= 0) { + byte_src = cpu_ldub_data_ra(env, src - i, ra); + } else { + byte_src = 0; + } + byte_dest |= byte_src << 4; + cpu_stb_data_ra(env, dest - i, byte_dest, ra); + } +} + /* compare unsigned byte arrays */ static uint32_t do_helper_clc(CPUS390XState *env, uint32_t l, uint64_t s1, uint64_t s2, uintptr_t ra) diff --git a/target/s390x/translate.c b/target/s390x/translate.c index 7b42c02..7be1c70 100644 --- a/target/s390x/translate.c +++ b/target/s390x/translate.c @@ -2996,6 +2996,14 @@ static ExitStatus op_mvn(DisasContext *s, DisasOps *o) return NO_EXIT; } +static ExitStatus op_mvo(DisasContext *s, DisasOps *o) +{ + TCGv_i32 l = tcg_const_i32(get_field(s->fields, l1)); + gen_helper_mvo(cpu_env, l, o->addr1, o->in2); + tcg_temp_free_i32(l); + return NO_EXIT; +} + static ExitStatus op_mvpg(DisasContext *s, DisasOps *o) { gen_helper_mvpg(cc_op, cpu_env, regs[0], o->in1, o->in2); |