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target/s390x: implement PACK ASCII

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Reviewed-by: Richard Henderson <rth@twiddle.net>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
Message-Id: <20170531220129.27724-24-aurelien@aurel32.net>
Signed-off-by: Richard Henderson <rth@twiddle.net>
This commit is contained in:
Aurelien Jarno 2017-06-01 00:01:22 +02:00 committed by Richard Henderson
parent 16f2e4b841
commit 3bd3d6d302
4 changed files with 54 additions and 0 deletions
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1
target/s390x/helper.h
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@ -86,6 +86,7 @@ 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(pka, TCG_CALL_NO_WG, void, env, i64, i64, i32)
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)

2
target/s390x/insn-data.def
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@ -665,6 +665,8 @@
/* 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)
/* PACK ASCII */
C(0xe900, PKA, SS_f, E2, la1, a2, 0, 0, pka, 0)
/* PREFETCH */
/* Implemented as nops of course. */

35
target/s390x/mem_helper.c
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@ -914,6 +914,41 @@ void HELPER(pack)(CPUS390XState *env, uint32_t len, uint64_t dest, uint64_t src)
}
}
void HELPER(pka)(CPUS390XState *env, uint64_t dest, uint64_t src,
uint32_t srclen)
{
uintptr_t ra = GETPC();
int i;
/* The destination operand is always 16 bytes long. */
const int destlen = 16;
/* The operands are processed from right to left. */
src += srclen - 1;
dest += destlen - 1;
for (i = 0; i < destlen; i++) {
uint8_t b = 0;
/* Start with a positive sign */
if (i == 0) {
b = 0xc;
} else if (srclen > 1) {
b = cpu_ldub_data_ra(env, src, ra) & 0x0f;
src--;
srclen--;
}
if (srclen > 1) {
b |= cpu_ldub_data_ra(env, src, ra) << 4;
src--;
srclen--;
}
cpu_stb_data_ra(env, dest, b, ra);
dest--;
}
}
void HELPER(unpk)(CPUS390XState *env, uint32_t len, uint64_t dest,
uint64_t src)
{

16
target/s390x/translate.c
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@ -3299,6 +3299,22 @@ static ExitStatus op_pack(DisasContext *s, DisasOps *o)
return NO_EXIT;
}
static ExitStatus op_pka(DisasContext *s, DisasOps *o)
{
int l2 = get_field(s->fields, l2) + 1;
TCGv_i32 l;
/* The length must not exceed 32 bytes. */
if (l2 > 32) {
gen_program_exception(s, PGM_SPECIFICATION);
return EXIT_NORETURN;
}
l = tcg_const_i32(l2);
gen_helper_pka(cpu_env, o->addr1, o->in2, l);
tcg_temp_free_i32(l);
return NO_EXIT;
}
static ExitStatus op_popcnt(DisasContext *s, DisasOps *o)
{
gen_helper_popcnt(o->out, o->in2);