Commit 0a890b31 authored by Jose Ricardo Ziviani's avatar Jose Ricardo Ziviani Committed by David Gibson
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target-ppc: Implement bcdctz. instruction 



bcdctz. converts from BCD to Zoned numeric format. 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: default avatarJose Ricardo Ziviani <joserz@linux.vnet.ibm.com>
Signed-off-by: default avatarDavid Gibson <david@gibson.dropbear.id.au>
parent 38f4cb04

target-ppc/helper.h

+1 −0
Original line number Diff line number Diff line
@@ -381,6 +381,7 @@ DEF_HELPER_4(bcdsub, i32, avr, avr, avr, i32) 
DEF_HELPER_3(bcdcfn, i32, avr, avr, i32)

DEF_HELPER_3(bcdctn, i32, avr, avr, i32)

DEF_HELPER_3(bcdcfz, i32, avr, avr, i32)

DEF_HELPER_3(bcdctz, i32, avr, avr, i32)



DEF_HELPER_2(xsadddp, void, env, i32)

DEF_HELPER_2(xssubdp, void, env, i32)

target-ppc/int_helper.c

+43 −0
Original line number Diff line number Diff line
@@ -2831,6 +2831,49 @@ uint32_t helper_bcdcfz(ppc_avr_t *r, ppc_avr_t *b, uint32_t ps) 
    return cr;

}



uint32_t helper_bcdctz(ppc_avr_t *r, ppc_avr_t *b, uint32_t ps)

{

    int i;

    int cr = 0;

    uint8_t digit = 0;

    int sgnb = bcd_get_sgn(b);

    int zone_lead = (ps) ? 0xF0 : 0x30;

    int invalid = (sgnb == 0);

    ppc_avr_t ret = { .u64 = { 0, 0 } };



    int ox_flag = ((b->u64[HI_IDX] >> 4) != 0);



    for (i = 0; i < 16; i++) {

        digit = bcd_get_digit(b, i + 1, &invalid);



        if (unlikely(invalid)) {

            break;

        }



        ret.u8[BCD_DIG_BYTE(i * 2)] = zone_lead + digit;

    }



    if (ps) {

        bcd_put_digit(&ret, (sgnb == 1) ? 0xC : 0xD, 1);

    } else {

        bcd_put_digit(&ret, (sgnb == 1) ? 0x3 : 0x7, 1);

    }



    cr = bcd_cmp_zero(b);



    if (ox_flag) {

        cr |= 1 << CRF_SO;

    }



    if (unlikely(invalid)) {

        cr = 1 << CRF_SO;

    }



    *r = ret;



    return cr;

}



void helper_vsbox(ppc_avr_t *r, ppc_avr_t *a)

{

    int i;

target-ppc/translate/vmx-impl.inc.c

+7 −0
Original line number Diff line number Diff line
@@ -988,10 +988,14 @@ GEN_BCD(bcdsub) 
GEN_BCD2(bcdcfn)

GEN_BCD2(bcdctn)

GEN_BCD2(bcdcfz)

GEN_BCD2(bcdctz)



static void gen_xpnd04_1(DisasContext *ctx)

{

    switch (opc4(ctx->opcode)) {

    case 4:

        gen_bcdctz(ctx);

        break;

    case 5:

        gen_bcdctn(ctx);

        break;
@@ -1010,6 +1014,9 @@ static void gen_xpnd04_1(DisasContext *ctx) 
static void gen_xpnd04_2(DisasContext *ctx)

{

    switch (opc4(ctx->opcode)) {

    case 4:

        gen_bcdctz(ctx);

        break;

    case 6:

        gen_bcdcfz(ctx);

        break;