bcdctz. converts from BCD to Zoned numeric format. Zoned format uses
a byte to represent a digit where the most significant nibble is 0x3
or 0xf, depending on the preferred signal.
Signed-off-by: Jose Ricardo Ziviani <jos...@linux.vnet.ibm.com>
---
target-ppc/helper.h | 1 +
target-ppc/int_helper.c | 51 +++++++++++++++++++++++++++++++++++++
target-ppc/translate/vmx-impl.inc.c | 7 +++--
3 files changed, 57 insertions(+), 2 deletions(-)
diff --git a/target-ppc/helper.h b/target-ppc/helper.h
index a9ac28b..489a405 100644
--- a/target-ppc/helper.h
+++ b/target-ppc/helper.h
@@ -374,6 +374,7 @@ DEF_HELPER_4(bcdsub, i32, avr, avr, avr, i32)
DEF_HELPER_3(bcdcfn, i32, avr, avr, i32)
DEF_HELPER_2(bcdctn, i32, avr, avr)
DEF_HELPER_3(bcdcfz, i32, avr, avr, i32)
+DEF_HELPER_3(bcdctz, i32, avr, avr, i32)
DEF_HELPER_2(xsadddp, void, env, i32)
DEF_HELPER_2(xssubdp, void, env, i32)
diff --git a/target-ppc/int_helper.c b/target-ppc/int_helper.c
index 19e6a3a..518824e 100644
--- a/target-ppc/int_helper.c
+++ b/target-ppc/int_helper.c
@@ -2774,6 +2774,57 @@ uint32_t helper_bcdcfz(ppc_avr_t *r, ppc_avr_t *b,
uint32_t ps)
return cr;
}
+
+uint32_t helper_bcdctz(ppc_avr_t *r, ppc_avr_t *b, uint32_t ps)
+{
+ int i;
+ int j;
+ int cr = 0;
+ uint8_t digit = 0;
+ int sgnb = bcd_get_sgn(b);
+ int zone_lead = (ps) ? 0xF0 : 0x30;
+ int invalid = (sgnb == 0);
+ ppc_avr_t ret = { .u64 = { 0, 0 } };
+
+ int eq_flag = (b->u64[HI_IDX] == 0) && ((b->u64[LO_IDX] >> 4) == 0);
+ int ox_flag = ((b->u64[HI_IDX] >> 4) != 0);
+
+ for (i = 0, j = 1; i < 32; i += 2, j++) {
+ digit = bcd_get_digit(b, j, &invalid);
+
+ if (unlikely(invalid)) {
+ break;
+ }
+
+ ret.u8[BCD_DIG_BYTE(i)] = zone_lead + digit;
+ }
+
+ if (ps) {
+ bcd_put_digit(&ret, (sgnb == 1) ? 0xC : 0xD, 1);
+ } else {
+ bcd_put_digit(&ret, (sgnb == 1) ? 0x3 : 0x7, 1);
+ }
+ bcd_put_digit(&ret, b->u8[BCD_DIG_BYTE(0)] >> 4, 0);
+
+ if (!eq_flag) {
+ cr = (sgnb == 1) ? 1 << CRF_GT : 1 << CRF_LT;
+ } else {
+ cr = 1 << CRF_EQ;
+ }
+
+ if (ox_flag) {
+ cr |= 1 << CRF_SO;
+ }
+
+ if (unlikely(invalid)) {
+ cr = 1 << CRF_SO;
+ }
+
+ *r = ret;
+
+ return cr;
+}
+
void helper_vsbox(ppc_avr_t *r, ppc_avr_t *a)
{
int i;
diff --git a/target-ppc/translate/vmx-impl.inc.c
b/target-ppc/translate/vmx-impl.inc.c
index 6e54437..a868740 100644
--- a/target-ppc/translate/vmx-impl.inc.c
+++ b/target-ppc/translate/vmx-impl.inc.c
@@ -992,6 +992,7 @@ GEN_BCD(bcdsub)
GEN_BCD2(bcdcfn)
GEN_BCD3(bcdctn)
GEN_BCD2(bcdcfz)
+GEN_BCD2(bcdctz)
static void gen_xpnd04_1(DisasContext *ctx)
{
@@ -1001,7 +1002,8 @@ static void gen_xpnd04_1(DisasContext *ctx)
case 2:
break; /* bcdcfsq. */
case 4:
- break; /* bcdctz. */
+ gen_bcdctz(ctx);
+ break;
case 5:
gen_bcdctn(ctx);
break;
@@ -1026,7 +1028,8 @@ static void gen_xpnd04_2(DisasContext *ctx)
case 2:
break; /* bcdcfsq. */
case 4:
- break; /* bcdctz. */
+ gen_bcdctz(ctx);
+ break;
case 6:
gen_bcdcfz(ctx);
break;
--
2.7.4
