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s390x/tcg: Implement LOAD LENGTHENED short HFP to long HFP

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Nice trick to load a 32 bit value into vector element 0 (32 bit element
size) from memory, zeroing out element1. The short HFP to long HFP
conversion really only is a shift.

Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: David Hildenbrand <david@redhat.com>
Message-Id: <20190225200318.16102-7-david@redhat.com>
Signed-off-by: Cornelia Huck <cohuck@redhat.com>
This commit is contained in:
David Hildenbrand 2019-02-25 21:03:17 +01:00 committed by Cornelia Huck
parent 2a1cf84452
commit 86b59624c4
2 changed files with 8 additions and 0 deletions
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2
target/s390x/insn-data.def
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@ -598,6 +598,8 @@
F(0xed04, LDEB, RXE, Z, 0, m2_32u, new, f1, ldeb, 0, IF_BFP)
F(0xed05, LXDB, RXE, Z, 0, m2_64, new_P, x1, lxdb, 0, IF_BFP)
F(0xed06, LXEB, RXE, Z, 0, m2_32u, new_P, x1, lxeb, 0, IF_BFP)
F(0xb324, LDER, RXE, Z, 0, e2, new, f1, lde, 0, IF_AFP1)
F(0xed24, LDE, RXE, Z, 0, m2_32u, new, f1, lde, 0, IF_AFP1)
/* LOAD ROUNDED */
F(0xb344, LEDBR, RRE, Z, 0, f2, new, e1, ledb, 0, IF_BFP)
F(0xb345, LDXBR, RRE, Z, x2h, x2l, new, f1, ldxb, 0, IF_BFP)

6
target/s390x/translate.c
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@ -2725,6 +2725,12 @@ static DisasJumpType op_lxeb(DisasContext *s, DisasOps *o)
return DISAS_NEXT;
}
static DisasJumpType op_lde(DisasContext *s, DisasOps *o)
{
tcg_gen_shli_i64(o->out, o->in2, 32);
return DISAS_NEXT;
}
static DisasJumpType op_llgt(DisasContext *s, DisasOps *o)
{
tcg_gen_andi_i64(o->out, o->in2, 0x7fffffff);