@@ -395,6 +395,7 @@ DEF_HELPER_3(bcdsetsgn, i32, avr, avr, i32)
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_2(xsadddp, void, env, i32)
DEF_HELPER_2(xssubdp, void, env, i32)
@@ -3169,6 +3169,49 @@ uint32_t helper_bcdsr(ppc_avr_t *r, ppc_avr_t *a, ppc_avr_t *b, uint32_t ps)
return cr;
}
+uint32_t helper_bcdtrunc(ppc_avr_t *r, ppc_avr_t *a, ppc_avr_t *b, uint32_t ps)
+{
+ int i;
+ int cr;
+ int ox_flag;
+ uint8_t digit;
+ uint8_t trunc;
+ int invalid = 0;
+ int sgnb = bcd_get_sgn(b);
+ 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] & 31);
+ for (i = 1; i < 32; i++) {
+ digit = bcd_get_digit(b, i, &invalid);
+
+ if (unlikely(invalid)) {
+ return CRF_SO;
+ }
+
+ if (i >= trunc) {
+ if (!ox_flag && digit > 0x0) {
+ ox_flag = 1;
+ }
+ bcd_put_digit(&ret, 0, i);
+ }
+ }
+ bcd_put_digit(&ret, bcd_preferred_sgn(sgnb, ps), 0);
+
+ cr = bcd_cmp_zero(&ret);
+ if (unlikely(ox_flag)) {
+ cr |= CRF_SO;
+ }
+ *r = ret;
+
+ return cr;
+}
+
void helper_vsbox(ppc_avr_t *r, ppc_avr_t *a)
{
int i;
@@ -1019,6 +1019,7 @@ GEN_BCD(bcdcpsgn);
GEN_BCD(bcds);
GEN_BCD(bcdus);
GEN_BCD(bcdsr);
+GEN_BCD(bcdtrunc);
static void gen_xpnd04_1(DisasContext *ctx)
{
@@ -1097,6 +1098,10 @@ GEN_VXFORM_DUAL(vsubudm, PPC2_ALTIVEC_207, PPC_NONE, \
bcds, PPC_NONE, PPC2_ISA300)
GEN_VXFORM_DUAL(vsubuwm, PPC_ALTIVEC, PPC_NONE, \
bcdus, PPC_NONE, PPC2_ISA300)
+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)
static void gen_vsbox(DisasContext *ctx)
{
@@ -143,14 +143,14 @@ GEN_VXFORM(vaddsws, 0, 14),
GEN_VXFORM_DUAL(vsububs, bcdadd, 0, 24, PPC_ALTIVEC, PPC_NONE),
GEN_VXFORM_DUAL(vsubuhs, bcdsub, 0, 25, PPC_ALTIVEC, PPC_NONE),
GEN_VXFORM(vsubuws, 0, 26),
-GEN_VXFORM(vsubsbs, 0, 28),
+GEN_VXFORM_DUAL(vsubsbs, bcdtrunc, 0, 28, PPC_NONE, PPC2_ISA300),
GEN_VXFORM(vsubshs, 0, 29),
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(vsubuqm, 0, 20),
GEN_VXFORM_207(vsubcuq, 0, 21),
+GEN_VXFORM_DUAL(vsubuqm, bcdtrunc, 0, 20, 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),
bcdtrunc.: Decimal integer truncate. Given a BCD number in vrb and the number of bytes to truncate in vra, the return register will have vrb with such bits truncated. Signed-off-by: Jose Ricardo Ziviani <joserz@linux.vnet.ibm.com> --- target-ppc/helper.h | 1 + target-ppc/int_helper.c | 43 +++++++++++++++++++++++++++++++++++++ target-ppc/translate/vmx-impl.inc.c | 5 +++++ target-ppc/translate/vmx-ops.inc.c | 4 ++-- 4 files changed, 51 insertions(+), 2 deletions(-)