bcdcfz. converts from Zoned numeric format to BCD. 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 | 55 +++++++++++++++++++++++++++++++++++++
target-ppc/translate/vmx-impl.inc.c | 7 +++--
3 files changed, 61 insertions(+), 2 deletions(-)
diff --git a/target-ppc/helper.h b/target-ppc/helper.h
index 92eaaf0..f460635 100644
--- a/target-ppc/helper.h
+++ b/target-ppc/helper.h
@@ -371,6 +371,7 @@ DEF_HELPER_4(bcdadd, i32, avr, avr, avr, i32)
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_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 cffe82c..8cbbdfc 100644
--- a/target-ppc/int_helper.c
+++ b/target-ppc/int_helper.c
@@ -2459,6 +2459,17 @@ static int bcd_preferred_sgn(int sgn, int ps)
}
}
+static uint8_t get_nibble(ppc_avr_t *bcd, int n)
+{
+ uint8_t result;
+ if (!(n & 1)) {
+ result = bcd->u8[BCD_DIG_BYTE(n)] & 0xF;
+ } else {
+ result = bcd->u8[BCD_DIG_BYTE(n)] >> 4;
+ }
+ return result;
+}
+
static uint8_t bcd_get_digit(ppc_avr_t *bcd, int n, int *invalid)
{
uint8_t result;
@@ -2713,6 +2724,50 @@ uint32_t helper_bcdctn(ppc_avr_t *r, ppc_avr_t *b)
return cr;
}
+uint32_t helper_bcdcfz(ppc_avr_t *r, ppc_avr_t *b, uint32_t ps)
+{
+ int i;
+ int j = 0;
+ int cr = 0;
+ int invalid = 0;
+ int eq_flag = 0;
+ int zone_digit = 0;
+ ppc_avr_t ret = { .u64 = { 0, 0 } };
+ int sgnb = get_nibble(b, 1);
+
+ if (unlikely(((sgnb < 0xA) && ps) ||
+ ((get_nibble(b, 0) > 0x9) && !ps))) {
+ invalid = 1;
+ }
+
+ for (i = 31, j = 16; i > 1; i -= 2, j--) {
+ zone_digit = get_nibble(b, i);
+ if (unlikely((ps && zone_digit != 0xF) ||
+ (!ps && zone_digit != 0x3))) {
+ invalid = 1;
+ }
+
+ eq_flag += zone_digit;
+ bcd_put_digit(&ret, get_nibble(b, i - 1), j);
+ }
+ bcd_put_digit(&ret, get_nibble(b, 0), 1);
+
+ if ((ps && (sgnb == 0xB || sgnb == 0xD)) ||
+ (!ps && (sgnb & 0x4))) {
+ bcd_put_digit(&ret, BCD_NEG_PREF, 0);
+ cr = (!eq_flag) ? 1 << CRF_LT : 1 << CRF_EQ;
+ } else {
+ bcd_put_digit(&ret, BCD_PLUS_PREF_1, 0);
+ cr = (!eq_flag) ? 1 << CRF_GT : 1 << CRF_EQ;
+ }
+
+ 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 4364881..9192f8f 100644
--- a/target-ppc/translate/vmx-impl.inc.c
+++ b/target-ppc/translate/vmx-impl.inc.c
@@ -917,6 +917,7 @@ GEN_BCD(bcdadd)
GEN_BCD(bcdsub)
GEN_BCD2(bcdcfn)
GEN_BCD3(bcdctn)
+GEN_BCD2(bcdcfz)
static void gen_xpnd04_1(DisasContext *ctx)
{
@@ -931,7 +932,8 @@ static void gen_xpnd04_1(DisasContext *ctx)
gen_bcdctn(ctx);
break;
case 6:
- break; /* bcdcfz. */
+ gen_bcdcfz(ctx);
+ break;
case 7:
gen_bcdcfn(ctx);
break;
@@ -952,7 +954,8 @@ static void gen_xpnd04_2(DisasContext *ctx)
case 4:
break; /* bcdctz. */
case 6:
- break; /* bcdcfz. */
+ gen_bcdcfz(ctx);
+ break;
case 7:
gen_bcdcfn(ctx);
break;
--
2.7.4
