> Subject: [PATCH v2 14/33] target/mips: Add emulation of nanoMIPS 32-bit load
> and store > instructions
>
> From: Yongbok Kim <yongbok....@mips.com>
>
> Add emulation of various nanoMIPS load and store instructions.
>
> Signed-off-by: Yongbok Kim <yongbok....@mips.com>
> Signed-off-by: Aleksandar Markovic <amarko...@wavecomp.com>
> Signed-off-by: Stefan Markovic <smarko...@wavecomp.com>
> ---
> target/mips/translate.c | 271
> ++++++++++++++++++++++++++++++++++++++++++++++++
> 1 file changed, 271 insertions(+)
>
Switch-case alignment in this parch doesn't look good. If this is fixed:
Reviewed-by: Aleksandar Markovic <amarko...@wavecomp.com>
> diff --git a/target/mips/translate.c b/target/mips/translate.c
> index 3160a3f..d48a0cf 100644
> --- a/target/mips/translate.c
> +++ b/target/mips/translate.c
> @@ -17527,10 +17527,281 @@ static int decode_nanomips_32_48_opc(CPUMIPSState
> *env, > DisasContext *ctx)
> }
> break;
> case NM_P_GP_BH:
> + {
> + uint32_t u = extract32(ctx->opcode, 0, 18);
> + switch ((ctx->opcode >> 18) & 0x7) {
> + case NM_LBGP:
> + gen_ld(ctx, OPC_LB, rt, 28, u);
> + break;
> + case NM_SBGP:
> + gen_st(ctx, OPC_SB, rt, 28, u);
> + break;
> + case NM_LBUGP:
> + gen_ld(ctx, OPC_LBU, rt, 28, u);
> + break;
> + case NM_ADDIUGP_B:
> + gen_arith_imm(ctx, OPC_ADDIU, rt, 28, u);
> + break;
> + case NM_P_GP_LH:
> + u &= ~1;
> + switch (ctx->opcode & 1) {
> + case NM_LHGP:
> + gen_ld(ctx, OPC_LH, rt, 28, u);
> + break;
> + case NM_LHUGP:
> + gen_ld(ctx, OPC_LHU, rt, 28, u);
> + break;
> + }
> + break;
> + case NM_P_GP_SH:
> + u &= ~1;
> + switch (ctx->opcode & 1) {
> + case NM_SHGP:
> + gen_st(ctx, OPC_SH, rt, 28, u);
> + break;
> + default:
> + generate_exception_end(ctx, EXCP_RI);
> + break;
> + }
> + break;
> + case NM_P_GP_CP1:
> + u &= ~0x3;
> + switch ((ctx->opcode & 0x3)) {
> + case NM_LWC1GP:
> + gen_cop1_ldst(ctx, OPC_LWC1, rt, 28, u);
> + break;
> + case NM_LDC1GP:
> + gen_cop1_ldst(ctx, OPC_LDC1, rt, 28, u);
> + break;
> + case NM_SWC1GP:
> + gen_cop1_ldst(ctx, OPC_SWC1, rt, 28, u);
> + break;
> + case NM_SDC1GP:
> + gen_cop1_ldst(ctx, OPC_SDC1, rt, 28, u);
> + break;
> + }
> + break;
> + default:
> + generate_exception_end(ctx, EXCP_RI);
> + break;
> + }
> + }
> break;
> case NM_P_LS_U12:
> + {
> + uint32_t u = extract32(ctx->opcode, 0, 12);
> + switch ((ctx->opcode >> 12) & 0x0f) {
> + case NM_P_PREFU12:
> + if (rt == 31) {
> + /* SYNCI */
> + /* Break the TB to be able to sync copied instructions
> + immediately */
> + ctx->base.is_jmp = DISAS_STOP;
> + } else {
> + /* PREF */
> + /* Treat as NOP. */
> + }
> + break;
> + case NM_LB:
> + gen_ld(ctx, OPC_LB, rt, rs, u);
> + break;
> + case NM_LH:
> + gen_ld(ctx, OPC_LH, rt, rs, u);
> + break;
> + case NM_LW:
> + gen_ld(ctx, OPC_LW, rt, rs, u);
> + break;
> + case NM_LBU:
> + gen_ld(ctx, OPC_LBU, rt, rs, u);
> + break;
> + case NM_LHU:
> + gen_ld(ctx, OPC_LHU, rt, rs, u);
> + break;
> + case NM_SB:
> + gen_st(ctx, OPC_SB, rt, rs, u);
> + break;
> + case NM_SH:
> + gen_st(ctx, OPC_SH, rt, rs, u);
> + break;
> + case NM_SW:
> + gen_st(ctx, OPC_SW, rt, rs, u);
> + break;
> + case NM_LWC1:
> + gen_cop1_ldst(ctx, OPC_LWC1, rt, rs, u);
> + break;
> + case NM_LDC1:
> + gen_cop1_ldst(ctx, OPC_LDC1, rt, rs, u);
> + break;
> + case NM_SWC1:
> + gen_cop1_ldst(ctx, OPC_SWC1, rt, rs, u);
> + break;
> + case NM_SDC1:
> + gen_cop1_ldst(ctx, OPC_SDC1, rt, rs, u);
> + break;
> + default:
> + generate_exception_end(ctx, EXCP_RI);
> + break;
> + }
> + }
> break;
> case NM_P_LS_S9:
> + {
> + int32_t s = (sextract32(ctx->opcode, 15, 1) << 8) |
> + extract32(ctx->opcode, 0, 8);
> + switch ((ctx->opcode >> 8) & 0x07) {
> + case NM_P_LS_S0:
> + switch ((ctx->opcode >> 11) & 0x0f) {
> + case NM_LBS9:
> + gen_ld(ctx, OPC_LB, rt, rs, s);
> + break;
> + case NM_LHS9:
> + gen_ld(ctx, OPC_LH, rt, rs, s);
> + break;
> + case NM_LWS9:
> + gen_ld(ctx, OPC_LW, rt, rs, s);
> + break;
> + case NM_LBUS9:
> + gen_ld(ctx, OPC_LBU, rt, rs, s);
> + break;
> + case NM_LHUS9:
> + gen_ld(ctx, OPC_LHU, rt, rs, s);
> + break;
> + case NM_SBS9:
> + gen_st(ctx, OPC_SB, rt, rs, s);
> + break;
> + case NM_SHS9:
> + gen_st(ctx, OPC_SH, rt, rs, s);
> + break;
> + case NM_SWS9:
> + gen_st(ctx, OPC_SW, rt, rs, s);
> + break;
> + case NM_LWC1S9:
> + gen_cop1_ldst(ctx, OPC_LWC1, rt, rs, s);
> + break;
> + case NM_LDC1S9:
> + gen_cop1_ldst(ctx, OPC_LDC1, rt, rs, s);
> + break;
> + case NM_SWC1S9:
> + gen_cop1_ldst(ctx, OPC_SWC1, rt, rs, s);
> + break;
> + case NM_SDC1S9:
> + gen_cop1_ldst(ctx, OPC_SDC1, rt, rs, s);
> + break;
> + case NM_P_PREFS9:
> + if (rt == 31) {
> + /* SYNCI */
> + /* Break the TB to be able to sync copied instructions
> + immediately */
> + ctx->base.is_jmp = DISAS_STOP;
> + } else {
> + /* PREF */
> + /* Treat as NOP. */
> + }
> + break;
> + default:
> + generate_exception_end(ctx, EXCP_RI);
> + break;
> + }
> + break;
> + case NM_P_LS_S1:
> + switch ((ctx->opcode >> 11) & 0x0f) {
> + case NM_UALH:
> + case NM_UASH:
> + {
> + TCGv t0 = tcg_temp_new();
> + TCGv t1 = tcg_temp_new();
> +
> + gen_base_offset_addr(ctx, t0, rs, s);
> +
> + switch ((ctx->opcode >> 11) & 0x0f) {
> + case NM_UALH:
> + tcg_gen_qemu_ld_tl(t0, t0, ctx->mem_idx, MO_TESW |
> + MO_UNALN);
> + gen_store_gpr(t0, rt);
> + break;
> + case NM_UASH:
> + gen_load_gpr(t1, rt);
> + tcg_gen_qemu_st_tl(t1, t0, ctx->mem_idx, MO_TEUW |
> + MO_UNALN);
> + break;
> + }
> + tcg_temp_free(t0);
> + tcg_temp_free(t1);
> + }
> + break;
> + case NM_P_LL:
> + switch (ctx->opcode & 0x03) {
> + case NM_LL:
> + gen_ld(ctx, OPC_LL, rt, rs, s);
> + break;
> + case NM_LLWP:
> + break;
> + }
> + break;
> + case NM_P_SC:
> + switch (ctx->opcode & 0x03) {
> + case NM_SC:
> + gen_st_cond(ctx, OPC_SC, rt, rs, s);
> + break;
> + case NM_SCWP:
> + break;
> + }
> + break;
> + case NM_CACHE:
> + check_cp0_enabled(ctx);
> + if (ctx->hflags & MIPS_HFLAG_ITC_CACHE) {
> + gen_cache_operation(ctx, rt, rs, s);
> + }
> + break;
> + }
> + break;
> + case NM_P_LS_WM:
> + case NM_P_LS_UAWM:
> + {
> + int32_t offset = sextract32(ctx->opcode, 15, 1) << 8 |
> + extract32(ctx->opcode, 0, 8);
> + int count = extract32(ctx->opcode, 12, 3);
> + int counter = 0;
> + TCGv va = tcg_temp_new();
> + TCGv t1 = tcg_temp_new();
> + TCGMemOp memop = ((ctx->opcode >> 8) & 0x07) == NM_P_LS_UAWM ?
> + MO_UNALN : 0;
> +
> + count = (count == 0) ? 8 : count;
> + while (counter != count) {
> + int this_rt = ((rt + counter) & 0x1f) | (rt & 0x10);
> + int32_t this_offset = offset + (counter << 2);
> +
> + gen_base_offset_addr(ctx, va, rs, this_offset);
> +
> + switch (extract32(ctx->opcode, 11, 1)) {
> + case NM_LWM:
> + tcg_gen_qemu_ld_tl(t1, va, ctx->mem_idx,
> + memop | MO_TESL);
> + gen_store_gpr(t1, this_rt);
> + if ((this_rt == rs) &&
> + (counter != (count - 1))) {
> + /* UNPREDICTABLE */
> + }
> + break;
> + case NM_SWM:
> + this_rt = (rt == 0) ? 0 : this_rt;
> + gen_load_gpr(t1, this_rt);
> + tcg_gen_qemu_st_tl(t1, va, ctx->mem_idx,
> + memop | MO_TEUL);
> + break;
> + }
> + counter++;
> + }
> + tcg_temp_free(va);
> + tcg_temp_free(t1);
> + }
> + break;
> + default:
> + generate_exception_end(ctx, EXCP_RI);
> + break;
> + }
> + }
> break;
> case NM_MOVE_BALC:
> break;
> --
> 2.7.4
>
>
