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target/mips: Add emulation of misc nanoMIPS instructions (pool32axf)

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Add emulation of misc nanoMIPS instructions situated in pool32axf.

Backports commit 642241870a029da1525ad1641e1c99d434580817 from qemu
This commit is contained in:
Yongbok Kim 2018-08-27 05:02:06 -04:00 committed by Lioncash
parent a2ff65acec
commit db0ca1924e
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GPG key ID: 4E3C3CC1031BA9C7
1 changed files with 92 additions and 0 deletions
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92
qemu/target/mips/translate.c
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@ -17151,6 +17151,90 @@ static void gen_pool32a0_nanomips_insn(DisasContext *ctx)
}
}
static void gen_pool32axf_nanomips_insn(CPUMIPSState *env, DisasContext *ctx)
{
#ifndef CONFIG_USER_ONLY
TCGContext *tcg_ctx = ctx->uc->tcg_ctx;
int rt = extract32(ctx->opcode, 21, 5);
int rs = extract32(ctx->opcode, 16, 5);
#endif
switch (extract32(ctx->opcode, 6, 3)) {
case NM_POOL32AXF_4:
case NM_POOL32AXF_5:
switch (extract32(ctx->opcode, 9, 7)) {
#ifndef CONFIG_USER_ONLY
case NM_TLBP:
gen_cp0(env, ctx, OPC_TLBP, 0, 0);
break;
case NM_TLBR:
gen_cp0(env, ctx, OPC_TLBR, 0, 0);
break;
case NM_TLBWI:
gen_cp0(env, ctx, OPC_TLBWI, 0, 0);
break;
case NM_TLBWR:
gen_cp0(env, ctx, OPC_TLBWR, 0, 0);
break;
case NM_TLBINV:
gen_cp0(env, ctx, OPC_TLBINV, 0, 0);
break;
case NM_TLBINVF:
gen_cp0(env, ctx, OPC_TLBINVF, 0, 0);
break;
case NM_DI:
check_cp0_enabled(ctx);
{
TCGv t0 = tcg_temp_new(tcg_ctx);
save_cpu_state(ctx, 1);
gen_helper_di(tcg_ctx, t0, tcg_ctx->cpu_env);
gen_store_gpr(tcg_ctx, t0, rt);
/* Stop translation as we may have switched the execution mode */
ctx->base.is_jmp = DISAS_STOP;
tcg_temp_free(tcg_ctx, t0);
}
break;
case NM_EI:
check_cp0_enabled(ctx);
{
TCGv t0 = tcg_temp_new(tcg_ctx);
save_cpu_state(ctx, 1);
gen_helper_ei(tcg_ctx, t0, tcg_ctx->cpu_env);
gen_store_gpr(ctx, t0, rt);
/* Stop translation as we may have switched the execution mode */
ctx->base.is_jmp = DISAS_STOP;
tcg_temp_free(tcg_ctx, t0);
}
break;
case NM_RDPGPR:
gen_load_srsgpr(rs, rt);
break;
case NM_WRPGPR:
gen_store_srsgpr(rs, rt);
break;
case NM_WAIT:
gen_cp0(env, ctx, OPC_WAIT, 0, 0);
break;
case NM_DERET:
gen_cp0(env, ctx, OPC_DERET, 0, 0);
break;
case NM_ERETX:
gen_cp0(env, ctx, OPC_ERET, 0, 0);
break;
#endif
default:
generate_exception_end(ctx, EXCP_RI);
break;
}
break;
default:
generate_exception_end(ctx, EXCP_RI);
break;
}
}
static void gen_pool32f_nanomips_insn(DisasContext *ctx)
{
int rt, rs, rd;
@ -17523,6 +17607,14 @@ static int decode_nanomips_32_48_opc(CPUMIPSState *env, DisasContext *ctx)
gen_pool32a0_nanomips_insn(ctx);
break;
case NM_POOL32A7:
switch (extract32(ctx->opcode, 3, 3)) {
case NM_POOL32AXF:
gen_pool32axf_nanomips_insn(env, ctx);
break;
default:
generate_exception_end(ctx, EXCP_RI);
break;
}
break;
default:
generate_exception_end(ctx, EXCP_RI);