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s390x: add ldeb instruction

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While running perl, we encountered the ldeb instruction to be used,
so we implement it :).

Signed-off-by: Alexander Graf <agraf@suse.de>
This commit is contained in:
Alexander Graf 2011-07-14 11:44:11 +02:00
parent a3efecb847
commit 27b5979d9d
3 changed files with 14 additions and 0 deletions
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1
target-s390x/helpers.h
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@ -102,6 +102,7 @@ DEF_HELPER_3(madb, void, i32, i64, i32)
DEF_HELPER_3(maebr, void, i32, i32, i32)
DEF_HELPER_3(madbr, void, i32, i32, i32)
DEF_HELPER_3(msdbr, void, i32, i32, i32)
DEF_HELPER_2(ldeb, void, i32, i64)
DEF_HELPER_2(lxdb, void, i32, i64)
DEF_HELPER_FLAGS_2(tceb, TCG_CALL_PURE, i32, i32, i64)
DEF_HELPER_FLAGS_2(tcdb, TCG_CALL_PURE, i32, i32, i64)

9
target-s390x/op_helper.c
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@ -1631,6 +1631,15 @@ void HELPER(maebr)(uint32_t f1, uint32_t f3, uint32_t f2)
&env->fpu_status);
}
/* convert 32-bit float to 64-bit float */
void HELPER(ldeb)(uint32_t f1, uint64_t a2)
{
uint32_t v2;
v2 = ldl(a2);
env->fregs[f1].d = float32_to_float64(v2,
&env->fpu_status);
}
/* convert 64-bit float to 128-bit float */
void HELPER(lxdb)(uint32_t f1, uint64_t a2)
{

4
target-s390x/translate.c
View File

@ -2214,6 +2214,10 @@ static void disas_ed(DisasContext *s, int op, int r1, int x2, int b2, int d2,
addr = get_address(s, x2, b2, d2);
tmp_r1 = tcg_const_i32(r1);
switch (op) {
case 0x4: /* LDEB R1,D2(X2,B2) [RXE] */
potential_page_fault(s);
gen_helper_ldeb(tmp_r1, addr);
break;
case 0x5: /* LXDB R1,D2(X2,B2) [RXE] */
potential_page_fault(s);
gen_helper_lxdb(tmp_r1, addr);