Commit 4004c1db authored by Vivek Andrew Sha's avatar Vivek Andrew Sha Committed by David Gibson
Browse files

target-ppc: add vsrv instruction 



Adds Vector Shift Right Variable instruction.

Signed-off-by: default avatarVivek Andrew Sha <vivekandrewsha@gmail.com>
[ reverse the order of computation to avoid temporary array ]
Signed-off-by: default avatarNikunj A Dadhania <nikunj@linux.vnet.ibm.com>
Reviewed-by: default avatarRichard Henderson <rth@twiddle.net>
Signed-off-by: default avatarDavid Gibson <david@gibson.dropbear.id.au>
parent 5644a175

target-ppc/helper.h

+1 −0
Original line number Diff line number Diff line
@@ -211,6 +211,7 @@ DEF_HELPER_3(vslw, void, avr, avr, avr) 
DEF_HELPER_3(vsld, void, avr, avr, avr)

DEF_HELPER_3(vslo, void, avr, avr, avr)

DEF_HELPER_3(vsro, void, avr, avr, avr)

DEF_HELPER_3(vsrv, void, avr, avr, avr)

DEF_HELPER_3(vslv, void, avr, avr, avr)

DEF_HELPER_3(vaddcuw, void, avr, avr, avr)

DEF_HELPER_3(vsubcuw, void, avr, avr, avr)

target-ppc/int_helper.c

+17 −0
Original line number Diff line number Diff line
@@ -1710,6 +1710,23 @@ void helper_vslv(ppc_avr_t *r, ppc_avr_t *a, ppc_avr_t *b) 
    }

}



void helper_vsrv(ppc_avr_t *r, ppc_avr_t *a, ppc_avr_t *b)

{

    int i;

    unsigned int shift, bytes;



    /* Use reverse order, as destination and source register can be same. Its

     * being modified in place saving temporary, reverse order will guarantee

     * that computed result is not fed back.

     */

    for (i = ARRAY_SIZE(r->u8) - 1; i >= 0; i--) {

        shift = b->u8[i] & 0x7;                 /* extract shift value */

        bytes = ((i ? a->u8[i - 1] : 0) << 8) + a->u8[i];

                                                /* extract adjacent bytes */

        r->u8[i] = (bytes >> shift) & 0xFF;     /* shift and store result */

    }

}



void helper_vsldoi(ppc_avr_t *r, ppc_avr_t *a, ppc_avr_t *b, uint32_t shift)

{

    int sh = shift & 0xf;

target-ppc/translate/vmx-impl.c

+1 −0
Original line number Diff line number Diff line
@@ -383,6 +383,7 @@ GEN_VXFORM(vsrab, 2, 12); 
GEN_VXFORM(vsrah, 2, 13);

GEN_VXFORM(vsraw, 2, 14);

GEN_VXFORM(vsrad, 2, 15);

GEN_VXFORM(vsrv, 2, 28);

GEN_VXFORM(vslv, 2, 29);

GEN_VXFORM(vslo, 6, 16);

GEN_VXFORM(vsro, 6, 17);

target-ppc/translate/vmx-ops.c

+1 −0
Original line number Diff line number Diff line
@@ -110,6 +110,7 @@ GEN_VXFORM(vsrab, 2, 12), 
GEN_VXFORM(vsrah, 2, 13),

GEN_VXFORM(vsraw, 2, 14),

GEN_VXFORM_207(vsrad, 2, 15),

GEN_VXFORM_300(vsrv, 2, 28),

GEN_VXFORM_300(vslv, 2, 29),

GEN_VXFORM(vslo, 6, 16),

GEN_VXFORM(vsro, 6, 17),