Commit fd487f83 authored by Mateja Marjanovic's avatar Mateja Marjanovic Committed by Aleksandar Markovic
Browse files

target/mips: Add emulation of MMI instruction PCPYUD 



Add emulation of MMI instruction PCPYUD. The emulation is implemented
using TCG front end operations directly to achieve better performance.

Signed-off-by: default avatarMateja Marjanovic <mateja.marjanovic@rt-rk.com>
Signed-off-by: default avatarAleksandar Markovic <amarkovic@wavecomp.com>
Reviewed-by: default avatarAleksandar Rikalo <arikalo@wavecomp.com>
Message-Id: <1551712405-2530-4-git-send-email-mateja.marjanovic@rt-rk.com>
parent b87eef31

target/mips/translate.c

+42 −1
Original line number Diff line number Diff line
@@ -24458,6 +24458,45 @@ static void gen_mmi_pcpyld(DisasContext *ctx) 
    }

}









/*









 *  PCPYUD rd, rs, rt









 *









 *    Parallel Copy Upper Doubleword









 *









 *   1 0 9 8 7 6 5 4 3 2 1 0 9 8 7 6 5 4 3 2 1 0 9 8 7 6 5 4 3 2 1 0









 *  +-----------+---------+---------+---------+---------+-----------+









 *  |    MMI    |   rs    |   rt    |   rd    | PCPYUD  |    MMI3   |









 *  +-----------+---------+---------+---------+---------+-----------+









 */









static void gen_mmi_pcpyud(DisasContext *ctx)









{









    uint32_t rs, rt, rd;









    uint32_t opcode;

















    opcode = ctx->opcode;

















    rs = extract32(opcode, 21, 5);









    rt = extract32(opcode, 16, 5);









    rd = extract32(opcode, 11, 5);

















    if (rd == 0) {









        /* nop */









    } else {









        if (rs == 0) {









            tcg_gen_movi_i64(cpu_gpr[rd], 0);









        } else {









            tcg_gen_mov_i64(cpu_gpr[rd], cpu_mmr[rs]);









        }









        if (rt == 0) {









            tcg_gen_movi_i64(cpu_mmr[rd], 0);









        } else {









            if (rd != rt) {









                tcg_gen_mov_i64(cpu_mmr[rd], cpu_mmr[rt]);









            }









        }









    }









}

















#endif
























@@ -27508,7 +27547,6 @@ static void decode_mmi3(CPUMIPSState *env, DisasContext *ctx)







    case MMI_OPC_3_PINTEH:     /* TODO: MMI_OPC_3_PINTEH */









    case MMI_OPC_3_PMULTUW:    /* TODO: MMI_OPC_3_PMULTUW */









    case MMI_OPC_3_PDIVUW:     /* TODO: MMI_OPC_3_PDIVUW */









    case MMI_OPC_3_PCPYUD:     /* TODO: MMI_OPC_3_PCPYUD */









    case MMI_OPC_3_POR:        /* TODO: MMI_OPC_3_POR */









    case MMI_OPC_3_PNOR:       /* TODO: MMI_OPC_3_PNOR */









    case MMI_OPC_3_PEXCH:      /* TODO: MMI_OPC_3_PEXCH */








@@ -27518,6 +27556,9 @@ static void decode_mmi3(CPUMIPSState *env, DisasContext *ctx)







    case MMI_OPC_3_PCPYH:









        gen_mmi_pcpyh(ctx);









        break;









    case MMI_OPC_3_PCPYUD:









        gen_mmi_pcpyud(ctx);









        break;









    default:









        MIPS_INVAL("TX79 MMI class MMI3");









        generate_exception_end(ctx, EXCP_RI);