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s390x/tcg: Implement VECTOR FP SQUARE ROOT

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Simulate XxC=0 and ERM=0 (current mode), so we can use the existing
helper function.

Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: David Hildenbrand <david@redhat.com>
This commit is contained in:
David Hildenbrand 2019-05-29 22:22:35 +02:00
parent 76e35cc7a5
commit 5938f20cb8
4 changed files with 40 additions and 0 deletions
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2
target/s390x/helper.h
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@ -288,6 +288,8 @@ DEF_HELPER_FLAGS_6(gvec_vfma64, TCG_CALL_NO_WG, void, ptr, cptr, cptr, cptr, env
DEF_HELPER_FLAGS_6(gvec_vfma64s, TCG_CALL_NO_WG, void, ptr, cptr, cptr, cptr, env, i32)
DEF_HELPER_FLAGS_6(gvec_vfms64, TCG_CALL_NO_WG, void, ptr, cptr, cptr, cptr, env, i32)
DEF_HELPER_FLAGS_6(gvec_vfms64s, TCG_CALL_NO_WG, void, ptr, cptr, cptr, cptr, env, i32)
DEF_HELPER_FLAGS_4(gvec_vfsq64, TCG_CALL_NO_WG, void, ptr, cptr, env, i32)
DEF_HELPER_FLAGS_4(gvec_vfsq64s, TCG_CALL_NO_WG, void, ptr, cptr, env, i32)
#ifndef CONFIG_USER_ONLY
DEF_HELPER_3(servc, i32, env, i64, i64)

2
target/s390x/insn-data.def
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@ -1242,6 +1242,8 @@
F(0xe78e, VFMS, VRR_e, V, 0, 0, 0, 0, vfma, 0, IF_VEC)
/* VECTOR FP PERFORM SIGN OPERATION */
F(0xe7cc, VFPSO, VRR_a, V, 0, 0, 0, 0, vfpso, 0, IF_VEC)
/* VECTOR FP SQUARE ROOT */
F(0xe7ce, VFSQ, VRR_a, V, 0, 0, 0, 0, vfsq, 0, IF_VEC)
#ifndef CONFIG_USER_ONLY
/* COMPARE AND SWAP AND PURGE */

19
target/s390x/translate_vx.inc.c
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@ -2779,3 +2779,22 @@ static DisasJumpType op_vfpso(DisasContext *s, DisasOps *o)
}
return DISAS_NEXT;
}
static DisasJumpType op_vfsq(DisasContext *s, DisasOps *o)
{
const uint8_t fpf = get_field(s->fields, m3);
const uint8_t m4 = get_field(s->fields, m4);
gen_helper_gvec_2_ptr *fn = gen_helper_gvec_vfsq64;
if (fpf != FPF_LONG || extract32(m4, 0, 3)) {
gen_program_exception(s, PGM_SPECIFICATION);
return DISAS_NORETURN;
}
if (extract32(m4, 3, 1)) {
fn = gen_helper_gvec_vfsq64s;
}
gen_gvec_2_ptr(get_field(s->fields, v1), get_field(s->fields, v2), cpu_env,
0, fn);
return DISAS_NEXT;
}

17
target/s390x/vec_fpu_helper.c
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@ -552,3 +552,20 @@ void HELPER(gvec_vfms64s)(void *v1, const void *v2, const void *v3,
{
vfma64(v1, v2, v3, v4, env, true, float_muladd_negate_c, GETPC());
}
static uint64_t vfsq64(uint64_t a, float_status *s)
{
return float64_sqrt(a, s);
}
void HELPER(gvec_vfsq64)(void *v1, const void *v2, CPUS390XState *env,
uint32_t desc)
{
vop64_2(v1, v2, env, false, false, 0, vfsq64, GETPC());
}
void HELPER(gvec_vfsq64s)(void *v1, const void *v2, CPUS390XState *env,
uint32_t desc)
{
vop64_2(v1, v2, env, true, false, 0, vfsq64, GETPC());
}