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target/s390x: implement PACK 

Reviewed-by: Richard Henderson <rth@twiddle.net>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
Message-Id: <20170531220129.27724-7-aurelien@aurel32.net>
Signed-off-by: Richard Henderson <rth@twiddle.net>
master
Aurelien Jarno 2017-06-01 00:01:05 +02:00 committed by Richard Henderson
parent 0c0974d785
commit 76c574906e
4 changed files with 51 additions and 0 deletions
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1
target/s390x/helper.h
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@ -75,6 +75,7 @@ DEF_HELPER_FLAGS_2(sqeb, TCG_CALL_NO_WG, i64, env, i64)
DEF_HELPER_FLAGS_2(sqdb, TCG_CALL_NO_WG, i64, env, i64)
DEF_HELPER_FLAGS_3(sqxb, TCG_CALL_NO_WG, i64, env, i64, i64)
DEF_HELPER_FLAGS_1(cvd, TCG_CALL_NO_RWG_SE, i64, s32)
DEF_HELPER_FLAGS_4(pack, TCG_CALL_NO_WG, void, env, i32, i64, i64)
DEF_HELPER_FLAGS_4(unpk, TCG_CALL_NO_WG, void, env, i32, i64, i64)
DEF_HELPER_FLAGS_4(tr, TCG_CALL_NO_WG, void, env, i32, i64, i64)
DEF_HELPER_4(tre, i64, env, i64, i64, i64)

5
target/s390x/insn-data.def
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@ -639,6 +639,11 @@
C(0x9600, OI, SI, Z, m1_8u, i2_8u, new, m1_8, or, nz64)
C(0xeb56, OIY, SIY, LD, m1_8u, i2_8u, new, m1_8, or, nz64)
/* PACK */
/* 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(0xf200, PACK, SS_a, Z, la1, a2, 0, 0, pack, 0)
/* PREFETCH */
/* Implemented as nops of course. */
C(0xe336, PFD, RXY_b, GIE, 0, 0, 0, 0, 0, 0)

37
target/s390x/mem_helper.c
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@ -644,6 +644,43 @@ uint64_t HELPER(cksm)(CPUS390XState *env, uint64_t r1,
return len;
}
void HELPER(pack)(CPUS390XState *env, uint32_t len, uint64_t dest, uint64_t src)
{
uintptr_t ra = GETPC();
int len_dest = len >> 4;
int len_src = len & 0xf;
uint8_t b;
dest += len_dest;
src += len_src;
/* last byte is special, it only flips the nibbles */
b = cpu_ldub_data_ra(env, src, ra);
cpu_stb_data_ra(env, dest, (b << 4) | (b >> 4), ra);
src--;
len_src--;
/* now pack every value */
while (len_dest >= 0) {
b = 0;
if (len_src > 0) {
b = cpu_ldub_data_ra(env, src, ra) & 0x0f;
src--;
len_src--;
}
if (len_src > 0) {
b |= cpu_ldub_data_ra(env, src, ra) << 4;
src--;
len_src--;
}
len_dest--;
dest--;
cpu_stb_data_ra(env, dest, b, ra);
}
}
void HELPER(unpk)(CPUS390XState *env, uint32_t len, uint64_t dest,
uint64_t src)
{

8
target/s390x/translate.c
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@ -3144,6 +3144,14 @@ static ExitStatus op_ori(DisasContext *s, DisasOps *o)
return NO_EXIT;
}
static ExitStatus op_pack(DisasContext *s, DisasOps *o)
{
TCGv_i32 l = tcg_const_i32(get_field(s->fields, l1));
gen_helper_pack(cpu_env, l, o->addr1, o->in2);
tcg_temp_free_i32(l);
return NO_EXIT;
}
static ExitStatus op_popcnt(DisasContext *s, DisasOps *o)
{
gen_helper_popcnt(o->out, o->in2);