bcdutrunc. Decimal unsigned truncate. Works like bcdtrunc. with
unsigned BCD numbers.
Signed-off-by: Jose Ricardo Ziviani <jos...@linux.vnet.ibm.com>
---
target-ppc/helper.h | 1 +
target-ppc/int_helper.c | 39 +++++++++++++++++++++++++++++++++++++
target-ppc/translate/vmx-impl.inc.c | 4 ++++
target-ppc/translate/vmx-ops.inc.c | 2 +-
4 files changed, 45 insertions(+), 1 deletion(-)
diff --git a/target-ppc/helper.h b/target-ppc/helper.h
index 49965b0..52a2707 100644
--- a/target-ppc/helper.h
+++ b/target-ppc/helper.h
@@ -396,6 +396,7 @@ DEF_HELPER_4(bcds, i32, avr, avr, avr, i32)
DEF_HELPER_4(bcdus, i32, avr, avr, avr, i32)
DEF_HELPER_4(bcdsr, i32, avr, avr, avr, i32)
DEF_HELPER_4(bcdtrunc, i32, avr, avr, avr, i32)
+DEF_HELPER_4(bcdutrunc, i32, avr, 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 faf34c1..6167f52 100644
--- a/target-ppc/int_helper.c
+++ b/target-ppc/int_helper.c
@@ -3212,6 +3212,45 @@ uint32_t helper_bcdtrunc(ppc_avr_t *r, ppc_avr_t *a,
ppc_avr_t *b, uint32_t ps)
return cr;
}
+uint32_t helper_bcdutrunc(ppc_avr_t *r, ppc_avr_t *a, ppc_avr_t *b, uint32_t
ps)
+{
+ int i;
+ uint8_t digit;
+ uint8_t trunc;
+ int ox_flag = 0;
+ int invalid = 0;
+ ppc_avr_t ret = *b;
+
+#if defined(HOST_WORDS_BIGENDIAN)
+ int upper = ARRAY_SIZE(a->u16) - 1;
+#else
+ int upper = 0;
+#endif
+
+ trunc = 32 - (a->u16[upper] % 33);
+ for (i = 0; i < 32; i++) {
+ digit = bcd_get_digit(b, i, &invalid);
+
+ if (unlikely(invalid)) {
+ return CRF_SO;
+ }
+
+ if (i >= trunc) {
+ if (unlikely(!ox_flag && digit > 0x0)) {
+ ox_flag = 1;
+ }
+ bcd_put_digit(&ret, 0, i);
+ }
+ }
+
+ *r = ret;
+ if (r->u64[HI_IDX] == 0 && r->u64[LO_IDX] == 0) {
+ return (ox_flag) ? CRF_SO | CRF_EQ : CRF_EQ;
+ } else {
+ return (ox_flag) ? CRF_SO | CRF_GT : CRF_GT;
+ }
+}
+
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 1683f42..3cb6fc2 100644
--- a/target-ppc/translate/vmx-impl.inc.c
+++ b/target-ppc/translate/vmx-impl.inc.c
@@ -1020,6 +1020,7 @@ GEN_BCD(bcds);
GEN_BCD(bcdus);
GEN_BCD(bcdsr);
GEN_BCD(bcdtrunc);
+GEN_BCD(bcdutrunc);
static void gen_xpnd04_1(DisasContext *ctx)
{
@@ -1102,6 +1103,9 @@ GEN_VXFORM_DUAL(vsubsbs, PPC_ALTIVEC, PPC_NONE, \
bcdtrunc, PPC_NONE, PPC2_ISA300)
GEN_VXFORM_DUAL(vsubuqm, PPC2_ALTIVEC_207, PPC_NONE, \
bcdtrunc, PPC_NONE, PPC2_ISA300)
+GEN_VXFORM_DUAL(vsubcuq, PPC2_ALTIVEC_207, PPC_NONE, \
+ bcdutrunc, PPC_NONE, PPC2_ISA300)
+
static void gen_vsbox(DisasContext *ctx)
{
diff --git a/target-ppc/translate/vmx-ops.inc.c
b/target-ppc/translate/vmx-ops.inc.c
index e6167a4..139f80c 100644
--- a/target-ppc/translate/vmx-ops.inc.c
+++ b/target-ppc/translate/vmx-ops.inc.c
@@ -149,8 +149,8 @@ GEN_VXFORM_DUAL(vsubsws, xpnd04_2, 0, 30, PPC_ALTIVEC,
PPC_NONE),
GEN_VXFORM_207(vadduqm, 0, 4),
GEN_VXFORM_207(vaddcuq, 0, 5),
GEN_VXFORM_DUAL(vaddeuqm, vaddecuq, 30, 0xFF, PPC_NONE, PPC2_ALTIVEC_207),
-GEN_VXFORM_207(vsubcuq, 0, 21),
GEN_VXFORM_DUAL(vsubuqm, bcdtrunc, 0, 20, PPC2_ALTIVEC_207, PPC2_ISA300),
+GEN_VXFORM_DUAL(vsubcuq, bcdutrunc, 0, 21, PPC2_ALTIVEC_207, PPC2_ISA300),
GEN_VXFORM_DUAL(vsubeuqm, vsubecuq, 31, 0xFF, PPC_NONE, PPC2_ALTIVEC_207),
GEN_VXFORM(vrlb, 2, 0),
GEN_VXFORM(vrlh, 2, 1),
--
2.7.4
