Commit 860b9ac7 authored by Laurent Vivier's avatar Laurent Vivier
Browse files

target-m68k: move fmove CR to a function 



Move code of fmove to/from control register to a function

Signed-off-by: default avatarLaurent Vivier <laurent@vivier.eu>
Reviewed-by: default avatarRichard Henderson <rth@twiddle.net>
Reviewed-by: default avatarPhilippe Mathieu-Daudé <f4bug@amsat.org>
Message-Id: <20170620205121.26515-2-laurent@vivier.eu>
parent 8dfaf23a

target/m68k/translate.c

+31 −25
Original line number Diff line number Diff line
@@ -4099,6 +4099,35 @@ DISAS_INSN(trap) 
    gen_exception(s, s->pc - 2, EXCP_TRAP0 + (insn & 0xf));

}



static void gen_op_fmove_fcr(CPUM68KState *env, DisasContext *s,

                             uint32_t insn, uint32_t ext)

{

    int mask = (ext >> 10) & 7;

    int is_write = (ext >> 13) & 1;

    TCGv val;



    switch (mask) {

    case 1: /* FPIAR */

    case 2: /* FPSR */

    default:

        qemu_log_mask(LOG_UNIMP, "Unimplemented: fmove to/from control %d",

                      mask);

        goto undef;

    case 4: /* FPCR */

        if (is_write) {

            val = tcg_const_i32(0);

            DEST_EA(env, insn, OS_LONG, val, NULL);

            tcg_temp_free(val);

        }

        /* Not implemented. Ignore register update */

        break;

    }

    return;

undef:

    s->pc -= 2;

    disas_undef_fpu(env, s, insn);

}



/* ??? FP exceptions are not implemented.  Most exceptions are deferred until

   immediately before the next FP instruction is executed.  */

DISAS_INSN(fpu)
@@ -4177,32 +4206,9 @@ DISAS_INSN(fpu) 
        tcg_temp_free_i32(tmp32);

        return;

    case 4: /* fmove to control register.  */

        switch ((ext >> 10) & 7) {

        case 4: /* FPCR */

            /* Not implemented.  Ignore writes.  */

            break;

        case 1: /* FPIAR */

        case 2: /* FPSR */

        default:

            cpu_abort(NULL, "Unimplemented: fmove to control %d",

                      (ext >> 10) & 7);

        }

        break;

    case 5: /* fmove from control register.  */

        switch ((ext >> 10) & 7) {

        case 4: /* FPCR */

            /* Not implemented.  Always return zero.  */

            tmp32 = tcg_const_i32(0);

            break;

        case 1: /* FPIAR */

        case 2: /* FPSR */

        default:

            cpu_abort(NULL, "Unimplemented: fmove from control %d",

                      (ext >> 10) & 7);

            goto undef;

        }

        DEST_EA(env, insn, OS_LONG, tmp32, NULL);

        break;

        gen_op_fmove_fcr(env, s, insn, ext);

        return;

    case 6: /* fmovem */

    case 7:

        {