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target-ppc: Implement bcdcpsgn. instruction

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bcdcpsgn.: Decimal copy sign. Given two registers vra and vrb, it
copies the vra value with vrb sign to the result register vrt.

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 01:53:32 -02:00 • committed by David Gibson
parent c85bc7dd90
commit c3025c3b0a
4 changed files with 28 additions and 1 deletions
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23
target/ppc/int_helper.c
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@ -2920,6 +2920,29 @@ uint32_t helper_bcdctsq(ppc_avr_t *r, ppc_avr_t *b, uint32_t ps)
return cr;
}
uint32_t helper_bcdcpsgn(ppc_avr_t *r, ppc_avr_t *a, ppc_avr_t *b, uint32_t ps)
{
int i;
int invalid = 0;
if (bcd_get_sgn(a) == 0 || bcd_get_sgn(b) == 0) {
return CRF_SO;
}
*r = *a;
bcd_put_digit(r, b->u8[BCD_DIG_BYTE(0)] & 0xF, 0);
for (i = 1; i < 32; i++) {
bcd_get_digit(a, i, &invalid);
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;