Commit 86b59624 authored by David Hildenbrand's avatar David Hildenbrand Committed by Cornelia Huck
Browse files

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



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: default avatarRichard Henderson <richard.henderson@linaro.org>
Signed-off-by: default avatarDavid Hildenbrand <david@redhat.com>
Message-Id: <20190225200318.16102-7-david@redhat.com>
Signed-off-by: default avatarCornelia Huck <cohuck@redhat.com>
parent 2a1cf844

target/s390x/insn-data.def

+2 −0
Original line number Diff line number Diff line
@@ -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)

target/s390x/translate.c

+6 −0
Original line number Diff line number Diff line
@@ -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);