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target-ppc: Implement bcdsetsgn. instruction

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bcdsetsgn.: Decimal set sign. This instruction copies the register
value to the result register but adjust the signal according to
the preferred sign value.

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 01:53:33 -02:00 committed by David Gibson
parent c3025c3b0a
commit 466a3f9ca3
3 changed files with 28 additions and 0 deletions
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1
target/ppc/helper.h
View File

@ -380,6 +380,7 @@ 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_4(bcdcpsgn, i32, avr, avr, avr, i32)
DEF_HELPER_3(bcdsetsgn, i32, avr, avr, i32)
DEF_HELPER_2(xsadddp, void, env, i32)
DEF_HELPER_2(xssubdp, void, env, i32)

19
target/ppc/int_helper.c
View File

@ -2943,6 +2943,25 @@ uint32_t helper_bcdcpsgn(ppc_avr_t *r, ppc_avr_t *a, ppc_avr_t *b, uint32_t ps)
return bcd_cmp_zero(r);
}
uint32_t helper_bcdsetsgn(ppc_avr_t *r, ppc_avr_t *b, uint32_t ps)
{
int i;
int invalid = 0;
int sgnb = bcd_get_sgn(b);
*r = *b;
bcd_put_digit(r, bcd_preferred_sgn(sgnb, ps), 0);
for (i = 1; i < 32; i++) {
bcd_get_digit(b, i, &invalid);
if (unlikely(invalid)) {
return CRF_SO;
}
}
return bcd_cmp_zero(r);
}
void helper_vsbox(ppc_avr_t *r, ppc_avr_t *a)
{
int i;

8
target/ppc/translate/vmx-impl.inc.c
View File

@ -991,6 +991,7 @@ GEN_BCD2(bcdcfz)
GEN_BCD2(bcdctz)
GEN_BCD2(bcdcfsq)
GEN_BCD2(bcdctsq)
GEN_BCD2(bcdsetsgn)
GEN_BCD(bcdcpsgn);
static void gen_xpnd04_1(DisasContext *ctx)
@ -1014,6 +1015,9 @@ static void gen_xpnd04_1(DisasContext *ctx)
case 7:
gen_bcdcfn(ctx);
break;
case 31:
gen_bcdsetsgn(ctx);
break;
default:
gen_invalid(ctx);
break;
@ -1038,12 +1042,16 @@ static void gen_xpnd04_2(DisasContext *ctx)
case 7:
gen_bcdcfn(ctx);
break;
case 31:
gen_bcdsetsgn(ctx);
break;
default:
gen_invalid(ctx);
break;
}
}
GEN_VXFORM_DUAL(vsubcuw, PPC_ALTIVEC, PPC_NONE, \
xpnd04_1, PPC_NONE, PPC2_ISA300)
GEN_VXFORM_DUAL(vsubsws, PPC_ALTIVEC, PPC_NONE, \