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target-ppc: Implement bcdctsq. instruction

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bcdctsq.: Decimal convert to signed quadword. It is possible to
convert packed decimal values to signed quadwords.

Signed-off-by: Jose Ricardo Ziviani <joserz@linux.vnet.ibm.com>
Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
This commit is contained in:
Jose Ricardo Ziviani 2016-11-25 01:53:31 -02:00 committed by David Gibson
parent a406c058e7
commit c85bc7dd90
3 changed files with 48 additions and 0 deletions
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1
target/ppc/helper.h
View File

@ -378,6 +378,7 @@ DEF_HELPER_3(bcdctn, i32, avr, avr, i32)
DEF_HELPER_3(bcdcfz, i32, avr, avr, i32)
DEF_HELPER_3(bcdctz, i32, avr, avr, i32)
DEF_HELPER_3(bcdcfsq, i32, avr, avr, i32)
DEF_HELPER_3(bcdctsq, i32, avr, avr, i32)
DEF_HELPER_2(xsadddp, void, env, i32)
DEF_HELPER_2(xssubdp, void, env, i32)

40
target/ppc/int_helper.c
View File

@ -2880,6 +2880,46 @@ uint32_t helper_bcdcfsq(ppc_avr_t *r, ppc_avr_t *b, uint32_t ps)
return cr;
}
uint32_t helper_bcdctsq(ppc_avr_t *r, ppc_avr_t *b, uint32_t ps)
{
uint8_t i;
int cr;
uint64_t carry;
uint64_t unused;
uint64_t lo_value;
uint64_t hi_value = 0;
int sgnb = bcd_get_sgn(b);
int invalid = (sgnb == 0);
lo_value = bcd_get_digit(b, 31, &invalid);
for (i = 30; i > 0; i--) {
mulu64(&lo_value, &carry, lo_value, 10ULL);
mulu64(&hi_value, &unused, hi_value, 10ULL);
lo_value += bcd_get_digit(b, i, &invalid);
hi_value += carry;
if (unlikely(invalid)) {
break;
}
}
if (sgnb == -1) {
r->s64[LO_IDX] = -lo_value;
r->s64[HI_IDX] = ~hi_value + !r->s64[LO_IDX];
} else {
r->s64[LO_IDX] = lo_value;
r->s64[HI_IDX] = hi_value;
}
cr = bcd_cmp_zero(b);
if (unlikely(invalid)) {
cr = CRF_SO;
}
return cr;
}
void helper_vsbox(ppc_avr_t *r, ppc_avr_t *a)
{
int i;

7
target/ppc/translate/vmx-impl.inc.c
View File

@ -990,10 +990,14 @@ GEN_BCD2(bcdctn)
GEN_BCD2(bcdcfz)
GEN_BCD2(bcdctz)
GEN_BCD2(bcdcfsq)
GEN_BCD2(bcdctsq)
static void gen_xpnd04_1(DisasContext *ctx)
{
switch (opc4(ctx->opcode)) {
case 0:
gen_bcdctsq(ctx);
break;
case 2:
gen_bcdcfsq(ctx);
break;
@ -1018,6 +1022,9 @@ static void gen_xpnd04_1(DisasContext *ctx)
static void gen_xpnd04_2(DisasContext *ctx)
{
switch (opc4(ctx->opcode)) {
case 0:
gen_bcdctsq(ctx);
break;
case 2:
gen_bcdcfsq(ctx);
break;