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target/m68k: implement fsave/frestore
Backports commit fff3b4b0e16c76669e56173acb9d3cc6aac85e85 from qemu
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@ -5298,28 +5298,39 @@ DISAS_INSN(fscc)
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#if defined(CONFIG_SOFTMMU)
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DISAS_INSN(frestore)
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{
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M68kCPU *cpu = m68k_env_get_cpu(env);
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TCGContext *tcg_ctx = s->uc->tcg_ctx;
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TCGv addr;
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if (IS_USER(s)) {
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gen_exception(s, s->insn_pc, EXCP_PRIVILEGE);
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return;
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}
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/* TODO: Implement frestore. */
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cpu_abort(CPU(cpu), "FRESTORE not implemented");
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if (m68k_feature(s->env, M68K_FEATURE_M68040)) {
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SRC_EA(env, addr, OS_LONG, 0, NULL);
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/* FIXME: check the state frame */
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} else {
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disas_undef(env, s, insn);
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}
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}
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DISAS_INSN(fsave)
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{
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M68kCPU *cpu = m68k_env_get_cpu(env);
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TCGContext *tcg_ctx = s->uc->tcg_ctx;
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if (IS_USER(s)) {
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gen_exception(s, s->insn_pc, EXCP_PRIVILEGE);
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return;
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}
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/* TODO: Implement fsave. */
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cpu_abort(CPU(cpu), "FSAVE not implemented");
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if (m68k_feature(s->env, M68K_FEATURE_M68040)) {
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/* always write IDLE */
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TCGv idle = tcg_const_i32(tcg_ctx, 0x41000000);
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DEST_EA(env, insn, OS_LONG, idle, NULL);
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tcg_temp_free(tcg_ctx, idle);
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} else {
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disas_undef(env, s, insn);
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}
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}
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#endif
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