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s390x/tcg: Implement VECTOR COUNT TRAILING ZEROS 

Implement it similar to VECTOR COUNT LEADING ZEROS.

Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: David Hildenbrand <david@redhat.com>
This commit is contained in:
David Hildenbrand 2019-03-21 10:36:26 +01:00
parent 28863f1dbd
commit 449a8ac250
4 changed files with 46 additions and 0 deletions
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2
target/s390x/helper.h
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@ -152,6 +152,8 @@ DEF_HELPER_FLAGS_4(gvec_vavgl8, TCG_CALL_NO_RWG, void, ptr, cptr, cptr, i32)
DEF_HELPER_FLAGS_4(gvec_vavgl16, TCG_CALL_NO_RWG, void, ptr, cptr, cptr, i32)
DEF_HELPER_FLAGS_3(gvec_vclz8, TCG_CALL_NO_RWG, void, ptr, cptr, i32)
DEF_HELPER_FLAGS_3(gvec_vclz16, TCG_CALL_NO_RWG, void, ptr, cptr, i32)
DEF_HELPER_FLAGS_3(gvec_vctz8, TCG_CALL_NO_RWG, void, ptr, cptr, i32)
DEF_HELPER_FLAGS_3(gvec_vctz16, TCG_CALL_NO_RWG, void, ptr, cptr, i32)
#ifndef CONFIG_USER_ONLY
DEF_HELPER_3(servc, i32, env, i64, i64)

2
target/s390x/insn-data.def
View File

@ -1086,6 +1086,8 @@
E(0xe7f9, VCHL, VRR_b, V, 0, 0, 0, 0, vc, 0, TCG_COND_GTU, IF_VEC)
/* VECTOR COUNT LEADING ZEROS */
F(0xe753, VCLZ, VRR_a, V, 0, 0, 0, 0, vclz, 0, IF_VEC)
/* VECTOR COUNT TRAILING ZEROS */
F(0xe752, VCTZ, VRR_a, V, 0, 0, 0, 0, vctz, 0, IF_VEC)
#ifndef CONFIG_USER_ONLY
/* COMPARE AND SWAP AND PURGE */

28
target/s390x/translate_vx.inc.c
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@ -1448,3 +1448,31 @@ static DisasJumpType op_vclz(DisasContext *s, DisasOps *o)
gen_gvec_2(get_field(s->fields, v1), get_field(s->fields, v2), &g[es]);
return DISAS_NEXT;
}
static void gen_ctz_i32(TCGv_i32 d, TCGv_i32 a)
{
tcg_gen_ctzi_i32(d, a, 32);
}
static void gen_ctz_i64(TCGv_i64 d, TCGv_i64 a)
{
tcg_gen_ctzi_i64(d, a, 64);
}
static DisasJumpType op_vctz(DisasContext *s, DisasOps *o)
{
const uint8_t es = get_field(s->fields, m3);
static const GVecGen2 g[4] = {
{ .fno = gen_helper_gvec_vctz8, },
{ .fno = gen_helper_gvec_vctz16, },
{ .fni4 = gen_ctz_i32, },
{ .fni8 = gen_ctz_i64, },
};
if (es > ES_64) {
gen_program_exception(s, PGM_SPECIFICATION);
return DISAS_NORETURN;
}
gen_gvec_2(get_field(s->fields, v1), get_field(s->fields, v2), &g[es]);
return DISAS_NEXT;
}

14
target/s390x/vec_int_helper.c
View File

@ -60,3 +60,17 @@ void HELPER(gvec_vclz##BITS)(void *v1, const void *v2, uint32_t desc) \
}
DEF_VCLZ(8)
DEF_VCLZ(16)
#define DEF_VCTZ(BITS) \
void HELPER(gvec_vctz##BITS)(void *v1, const void *v2, uint32_t desc) \
{ \
int i; \
\
for (i = 0; i < (128 / BITS); i++) { \
const uint##BITS##_t a = s390_vec_read_element##BITS(v2, i); \
\
s390_vec_write_element##BITS(v1, i, a ? ctz32(a) : BITS); \
} \
}
DEF_VCTZ(8)
DEF_VCTZ(16)