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target/s390x: implement UNPACK ASCII

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Reviewed-by: Richard Henderson <rth@twiddle.net>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
Message-Id: <20170531220129.27724-26-aurelien@aurel32.net>
Signed-off-by: Richard Henderson <rth@twiddle.net>
This commit is contained in:
Aurelien Jarno 2017-06-01 00:01:24 +02:00 committed by Richard Henderson
parent 4e256bef65
commit 1a35f08a22
4 changed files with 71 additions and 0 deletions
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1
target/s390x/helper.h
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@ -89,6 +89,7 @@ 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(pku, 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(unpka, TCG_CALL_NO_WG, i32, env, i64, i32, i64)
DEF_HELPER_FLAGS_4(tr, TCG_CALL_NO_WG, void, env, i32, i64, i64)
DEF_HELPER_4(tre, i64, env, i64, i64, i64)
DEF_HELPER_4(trt, i32, env, i32, i64, i64)

2
target/s390x/insn-data.def
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@ -871,6 +871,8 @@
/* 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(0xf300, UNPK, SS_a, Z, la1, a2, 0, 0, unpk, 0)
/* UNPACK ASCII */
C(0xea00, UNPKA, SS_a, E2, la1, a2, 0, 0, unpka, 0)
#ifndef CONFIG_USER_ONLY
/* COMPARE AND SWAP AND PURGE */

51
target/s390x/mem_helper.c
View File

@ -1008,6 +1008,57 @@ void HELPER(unpk)(CPUS390XState *env, uint32_t len, uint64_t dest,
}
}
uint32_t HELPER(unpka)(CPUS390XState *env, uint64_t dest, uint32_t destlen,
uint64_t src)
{
uintptr_t ra = GETPC();
int i;
uint32_t cc;
uint8_t b;
/* The source operand is always 16 bytes long. */
const int srclen = 16;
/* The operands are processed from right to left. */
src += srclen - 1;
dest += destlen - 1;
/* Check for the sign. */
b = cpu_ldub_data_ra(env, src, ra);
src--;
switch (b & 0xf) {
case 0xa:
case 0xc:
case 0xe ... 0xf:
cc = 0; /* plus */
break;
case 0xb:
case 0xd:
cc = 1; /* minus */
break;
default:
case 0x0 ... 0x9:
cc = 3; /* invalid */
break;
}
/* Now pad every nibble with 0x30, advancing one nibble at a time. */
for (i = 0; i < destlen; i++) {
if (i == 31) {
/* If length is 32 bytes, the leftmost byte is 0. */
b = 0;
} else if (i % 2) {
b = cpu_ldub_data_ra(env, src, ra);
src--;
} else {
b >>= 4;
}
cpu_stb_data_ra(env, dest, 0x30 + (b & 0xf), ra);
dest--;
}
return cc;
}
static uint32_t do_helper_tr(CPUS390XState *env, uint32_t len, uint64_t array,
uint64_t trans, uintptr_t ra)
{

17
target/s390x/translate.c
View File

@ -4349,6 +4349,23 @@ static ExitStatus op_unpk(DisasContext *s, DisasOps *o)
return NO_EXIT;
}
static ExitStatus op_unpka(DisasContext *s, DisasOps *o)
{
int l1 = get_field(s->fields, l1) + 1;
TCGv_i32 l;
/* The length must not exceed 32 bytes. */
if (l1 > 32) {
gen_program_exception(s, PGM_SPECIFICATION);
return EXIT_NORETURN;
}
l = tcg_const_i32(l1);
gen_helper_unpka(cc_op, cpu_env, o->addr1, l, o->in2);
tcg_temp_free_i32(l);
set_cc_static(s);
return NO_EXIT;
}
static ExitStatus op_xc(DisasContext *s, DisasOps *o)
{
int d1 = get_field(s->fields, d1);