diff options
Diffstat (limited to 'target-mips/translate.c')
| -rw-r--r-- | target-mips/translate.c | 472 |
1 files changed, 236 insertions, 236 deletions
diff --git a/target-mips/translate.c b/target-mips/translate.c index cbe348b928..76f3c073b8 100644 --- a/target-mips/translate.c +++ b/target-mips/translate.c @@ -10971,6 +10971,242 @@ static void gen_branch(DisasContext *ctx, int insn_bytes) } } +/* Compact Branches */ +static void gen_compute_compact_branch(DisasContext *ctx, uint32_t opc, + int rs, int rt, int32_t offset) +{ + int bcond_compute = 0; + TCGv t0 = tcg_temp_new(); + TCGv t1 = tcg_temp_new(); + + if (ctx->hflags & MIPS_HFLAG_BMASK) { +#ifdef MIPS_DEBUG_DISAS + LOG_DISAS("Branch in delay / forbidden slot at PC 0x" TARGET_FMT_lx + "\n", ctx->pc); +#endif + generate_exception(ctx, EXCP_RI); + goto out; + } + + /* Load needed operands and calculate btarget */ + switch (opc) { + /* compact branch */ + case OPC_BOVC: /* OPC_BEQZALC, OPC_BEQC */ + case OPC_BNVC: /* OPC_BNEZALC, OPC_BNEC */ + gen_load_gpr(t0, rs); + gen_load_gpr(t1, rt); + bcond_compute = 1; + ctx->btarget = addr_add(ctx, ctx->pc + 4, offset); + if (rs <= rt && rs == 0) { + /* OPC_BEQZALC, OPC_BNEZALC */ + tcg_gen_movi_tl(cpu_gpr[31], ctx->pc + 4); + } + break; + case OPC_BLEZC: /* OPC_BGEZC, OPC_BGEC */ + case OPC_BGTZC: /* OPC_BLTZC, OPC_BLTC */ + gen_load_gpr(t0, rs); + gen_load_gpr(t1, rt); + bcond_compute = 1; + ctx->btarget = addr_add(ctx, ctx->pc + 4, offset); + break; + case OPC_BLEZALC: /* OPC_BGEZALC, OPC_BGEUC */ + case OPC_BGTZALC: /* OPC_BLTZALC, OPC_BLTUC */ + if (rs == 0 || rs == rt) { + /* OPC_BLEZALC, OPC_BGEZALC */ + /* OPC_BGTZALC, OPC_BLTZALC */ + tcg_gen_movi_tl(cpu_gpr[31], ctx->pc + 4); + } + gen_load_gpr(t0, rs); + gen_load_gpr(t1, rt); + bcond_compute = 1; + ctx->btarget = addr_add(ctx, ctx->pc + 4, offset); + break; + case OPC_BC: + case OPC_BALC: + ctx->btarget = addr_add(ctx, ctx->pc + 4, offset); + break; + case OPC_BEQZC: + case OPC_BNEZC: + if (rs != 0) { + /* OPC_BEQZC, OPC_BNEZC */ + gen_load_gpr(t0, rs); + bcond_compute = 1; + ctx->btarget = addr_add(ctx, ctx->pc + 4, offset); + } else { + /* OPC_JIC, OPC_JIALC */ + TCGv tbase = tcg_temp_new(); + TCGv toffset = tcg_temp_new(); + + gen_load_gpr(tbase, rt); + tcg_gen_movi_tl(toffset, offset); + gen_op_addr_add(ctx, btarget, tbase, toffset); + tcg_temp_free(tbase); + tcg_temp_free(toffset); + } + break; + default: + MIPS_INVAL("Compact branch/jump"); + generate_exception(ctx, EXCP_RI); + goto out; + } + + if (bcond_compute == 0) { + /* Uncoditional compact branch */ + switch (opc) { + case OPC_JIALC: + tcg_gen_movi_tl(cpu_gpr[31], ctx->pc + 4); + /* Fallthrough */ + case OPC_JIC: + ctx->hflags |= MIPS_HFLAG_BR; + break; + case OPC_BALC: + tcg_gen_movi_tl(cpu_gpr[31], ctx->pc + 4); + /* Fallthrough */ + case OPC_BC: + ctx->hflags |= MIPS_HFLAG_B; + break; + default: + MIPS_INVAL("Compact branch/jump"); + generate_exception(ctx, EXCP_RI); + goto out; + } + + /* Generating branch here as compact branches don't have delay slot */ + gen_branch(ctx, 4); + } else { + /* Conditional compact branch */ + TCGLabel *fs = gen_new_label(); + save_cpu_state(ctx, 0); + + switch (opc) { + case OPC_BLEZALC: /* OPC_BGEZALC, OPC_BGEUC */ + if (rs == 0 && rt != 0) { + /* OPC_BLEZALC */ + tcg_gen_brcondi_tl(tcg_invert_cond(TCG_COND_LE), t1, 0, fs); + } else if (rs != 0 && rt != 0 && rs == rt) { + /* OPC_BGEZALC */ + tcg_gen_brcondi_tl(tcg_invert_cond(TCG_COND_GE), t1, 0, fs); + } else { + /* OPC_BGEUC */ + tcg_gen_brcond_tl(tcg_invert_cond(TCG_COND_GEU), t0, t1, fs); + } + break; + case OPC_BGTZALC: /* OPC_BLTZALC, OPC_BLTUC */ + if (rs == 0 && rt != 0) { + /* OPC_BGTZALC */ + tcg_gen_brcondi_tl(tcg_invert_cond(TCG_COND_GT), t1, 0, fs); + } else if (rs != 0 && rt != 0 && rs == rt) { + /* OPC_BLTZALC */ + tcg_gen_brcondi_tl(tcg_invert_cond(TCG_COND_LT), t1, 0, fs); + } else { + /* OPC_BLTUC */ + tcg_gen_brcond_tl(tcg_invert_cond(TCG_COND_LTU), t0, t1, fs); + } + break; + case OPC_BLEZC: /* OPC_BGEZC, OPC_BGEC */ + if (rs == 0 && rt != 0) { + /* OPC_BLEZC */ + tcg_gen_brcondi_tl(tcg_invert_cond(TCG_COND_LE), t1, 0, fs); + } else if (rs != 0 && rt != 0 && rs == rt) { + /* OPC_BGEZC */ + tcg_gen_brcondi_tl(tcg_invert_cond(TCG_COND_GE), t1, 0, fs); + } else { + /* OPC_BGEC */ + tcg_gen_brcond_tl(tcg_invert_cond(TCG_COND_GE), t0, t1, fs); + } + break; + case OPC_BGTZC: /* OPC_BLTZC, OPC_BLTC */ + if (rs == 0 && rt != 0) { + /* OPC_BGTZC */ + tcg_gen_brcondi_tl(tcg_invert_cond(TCG_COND_GT), t1, 0, fs); + } else if (rs != 0 && rt != 0 && rs == rt) { + /* OPC_BLTZC */ + tcg_gen_brcondi_tl(tcg_invert_cond(TCG_COND_LT), t1, 0, fs); + } else { + /* OPC_BLTC */ + tcg_gen_brcond_tl(tcg_invert_cond(TCG_COND_LT), t0, t1, fs); + } + break; + case OPC_BOVC: /* OPC_BEQZALC, OPC_BEQC */ + case OPC_BNVC: /* OPC_BNEZALC, OPC_BNEC */ + if (rs >= rt) { + /* OPC_BOVC, OPC_BNVC */ + TCGv t2 = tcg_temp_new(); + TCGv t3 = tcg_temp_new(); + TCGv t4 = tcg_temp_new(); + TCGv input_overflow = tcg_temp_new(); + + gen_load_gpr(t0, rs); + gen_load_gpr(t1, rt); + tcg_gen_ext32s_tl(t2, t0); + tcg_gen_setcond_tl(TCG_COND_NE, input_overflow, t2, t0); + tcg_gen_ext32s_tl(t3, t1); + tcg_gen_setcond_tl(TCG_COND_NE, t4, t3, t1); + tcg_gen_or_tl(input_overflow, input_overflow, t4); + + tcg_gen_add_tl(t4, t2, t3); + tcg_gen_ext32s_tl(t4, t4); + tcg_gen_xor_tl(t2, t2, t3); + tcg_gen_xor_tl(t3, t4, t3); + tcg_gen_andc_tl(t2, t3, t2); + tcg_gen_setcondi_tl(TCG_COND_LT, t4, t2, 0); + tcg_gen_or_tl(t4, t4, input_overflow); + if (opc == OPC_BOVC) { + /* OPC_BOVC */ + tcg_gen_brcondi_tl(tcg_invert_cond(TCG_COND_NE), t4, 0, fs); + } else { + /* OPC_BNVC */ + tcg_gen_brcondi_tl(tcg_invert_cond(TCG_COND_EQ), t4, 0, fs); + } + tcg_temp_free(input_overflow); + tcg_temp_free(t4); + tcg_temp_free(t3); + tcg_temp_free(t2); + } else if (rs < rt && rs == 0) { + /* OPC_BEQZALC, OPC_BNEZALC */ + if (opc == OPC_BEQZALC) { + /* OPC_BEQZALC */ + tcg_gen_brcondi_tl(tcg_invert_cond(TCG_COND_EQ), t1, 0, fs); + } else { + /* OPC_BNEZALC */ + tcg_gen_brcondi_tl(tcg_invert_cond(TCG_COND_NE), t1, 0, fs); + } + } else { + /* OPC_BEQC, OPC_BNEC */ + if (opc == OPC_BEQC) { + /* OPC_BEQC */ + tcg_gen_brcond_tl(tcg_invert_cond(TCG_COND_EQ), t0, t1, fs); + } else { + /* OPC_BNEC */ + tcg_gen_brcond_tl(tcg_invert_cond(TCG_COND_NE), t0, t1, fs); + } + } + break; + case OPC_BEQZC: + tcg_gen_brcondi_tl(tcg_invert_cond(TCG_COND_EQ), t0, 0, fs); + break; + case OPC_BNEZC: + tcg_gen_brcondi_tl(tcg_invert_cond(TCG_COND_NE), t0, 0, fs); + break; + default: + MIPS_INVAL("Compact conditional branch/jump"); + generate_exception(ctx, EXCP_RI); + goto out; + } + + /* Generating branch here as compact branches don't have delay slot */ + gen_goto_tb(ctx, 1, ctx->btarget); + gen_set_label(fs); + + ctx->hflags |= MIPS_HFLAG_FBNSLOT; + MIPS_DEBUG("Compact conditional branch"); + } + +out: + tcg_temp_free(t0); + tcg_temp_free(t1); +} + /* ISA extensions (ASEs) */ /* MIPS16 extension to MIPS32 */ @@ -16279,242 +16515,6 @@ static void gen_mipsdsp_accinsn(DisasContext *ctx, uint32_t op1, uint32_t op2, /* End MIPSDSP functions. */ -/* Compact Branches */ -static void gen_compute_compact_branch(DisasContext *ctx, uint32_t opc, - int rs, int rt, int32_t offset) -{ - int bcond_compute = 0; - TCGv t0 = tcg_temp_new(); - TCGv t1 = tcg_temp_new(); - - if (ctx->hflags & MIPS_HFLAG_BMASK) { -#ifdef MIPS_DEBUG_DISAS - LOG_DISAS("Branch in delay / forbidden slot at PC 0x" TARGET_FMT_lx - "\n", ctx->pc); -#endif - generate_exception(ctx, EXCP_RI); - goto out; - } - - /* Load needed operands and calculate btarget */ - switch (opc) { - /* compact branch */ - case OPC_BOVC: /* OPC_BEQZALC, OPC_BEQC */ - case OPC_BNVC: /* OPC_BNEZALC, OPC_BNEC */ - gen_load_gpr(t0, rs); - gen_load_gpr(t1, rt); - bcond_compute = 1; - ctx->btarget = addr_add(ctx, ctx->pc + 4, offset); - if (rs <= rt && rs == 0) { - /* OPC_BEQZALC, OPC_BNEZALC */ - tcg_gen_movi_tl(cpu_gpr[31], ctx->pc + 4); - } - break; - case OPC_BLEZC: /* OPC_BGEZC, OPC_BGEC */ - case OPC_BGTZC: /* OPC_BLTZC, OPC_BLTC */ - gen_load_gpr(t0, rs); - gen_load_gpr(t1, rt); - bcond_compute = 1; - ctx->btarget = addr_add(ctx, ctx->pc + 4, offset); - break; - case OPC_BLEZALC: /* OPC_BGEZALC, OPC_BGEUC */ - case OPC_BGTZALC: /* OPC_BLTZALC, OPC_BLTUC */ - if (rs == 0 || rs == rt) { - /* OPC_BLEZALC, OPC_BGEZALC */ - /* OPC_BGTZALC, OPC_BLTZALC */ - tcg_gen_movi_tl(cpu_gpr[31], ctx->pc + 4); - } - gen_load_gpr(t0, rs); - gen_load_gpr(t1, rt); - bcond_compute = 1; - ctx->btarget = addr_add(ctx, ctx->pc + 4, offset); - break; - case OPC_BC: - case OPC_BALC: - ctx->btarget = addr_add(ctx, ctx->pc + 4, offset); - break; - case OPC_BEQZC: - case OPC_BNEZC: - if (rs != 0) { - /* OPC_BEQZC, OPC_BNEZC */ - gen_load_gpr(t0, rs); - bcond_compute = 1; - ctx->btarget = addr_add(ctx, ctx->pc + 4, offset); - } else { - /* OPC_JIC, OPC_JIALC */ - TCGv tbase = tcg_temp_new(); - TCGv toffset = tcg_temp_new(); - - gen_load_gpr(tbase, rt); - tcg_gen_movi_tl(toffset, offset); - gen_op_addr_add(ctx, btarget, tbase, toffset); - tcg_temp_free(tbase); - tcg_temp_free(toffset); - } - break; - default: - MIPS_INVAL("Compact branch/jump"); - generate_exception(ctx, EXCP_RI); - goto out; - } - - if (bcond_compute == 0) { - /* Uncoditional compact branch */ - switch (opc) { - case OPC_JIALC: - tcg_gen_movi_tl(cpu_gpr[31], ctx->pc + 4); - /* Fallthrough */ - case OPC_JIC: - ctx->hflags |= MIPS_HFLAG_BR; - break; - case OPC_BALC: - tcg_gen_movi_tl(cpu_gpr[31], ctx->pc + 4); - /* Fallthrough */ - case OPC_BC: - ctx->hflags |= MIPS_HFLAG_B; - break; - default: - MIPS_INVAL("Compact branch/jump"); - generate_exception(ctx, EXCP_RI); - goto out; - } - - /* Generating branch here as compact branches don't have delay slot */ - gen_branch(ctx, 4); - } else { - /* Conditional compact branch */ - TCGLabel *fs = gen_new_label(); - save_cpu_state(ctx, 0); - - switch (opc) { - case OPC_BLEZALC: /* OPC_BGEZALC, OPC_BGEUC */ - if (rs == 0 && rt != 0) { - /* OPC_BLEZALC */ - tcg_gen_brcondi_tl(tcg_invert_cond(TCG_COND_LE), t1, 0, fs); - } else if (rs != 0 && rt != 0 && rs == rt) { - /* OPC_BGEZALC */ - tcg_gen_brcondi_tl(tcg_invert_cond(TCG_COND_GE), t1, 0, fs); - } else { - /* OPC_BGEUC */ - tcg_gen_brcond_tl(tcg_invert_cond(TCG_COND_GEU), t0, t1, fs); - } - break; - case OPC_BGTZALC: /* OPC_BLTZALC, OPC_BLTUC */ - if (rs == 0 && rt != 0) { - /* OPC_BGTZALC */ - tcg_gen_brcondi_tl(tcg_invert_cond(TCG_COND_GT), t1, 0, fs); - } else if (rs != 0 && rt != 0 && rs == rt) { - /* OPC_BLTZALC */ - tcg_gen_brcondi_tl(tcg_invert_cond(TCG_COND_LT), t1, 0, fs); - } else { - /* OPC_BLTUC */ - tcg_gen_brcond_tl(tcg_invert_cond(TCG_COND_LTU), t0, t1, fs); - } - break; - case OPC_BLEZC: /* OPC_BGEZC, OPC_BGEC */ - if (rs == 0 && rt != 0) { - /* OPC_BLEZC */ - tcg_gen_brcondi_tl(tcg_invert_cond(TCG_COND_LE), t1, 0, fs); - } else if (rs != 0 && rt != 0 && rs == rt) { - /* OPC_BGEZC */ - tcg_gen_brcondi_tl(tcg_invert_cond(TCG_COND_GE), t1, 0, fs); - } else { - /* OPC_BGEC */ - tcg_gen_brcond_tl(tcg_invert_cond(TCG_COND_GE), t0, t1, fs); - } - break; - case OPC_BGTZC: /* OPC_BLTZC, OPC_BLTC */ - if (rs == 0 && rt != 0) { - /* OPC_BGTZC */ - tcg_gen_brcondi_tl(tcg_invert_cond(TCG_COND_GT), t1, 0, fs); - } else if (rs != 0 && rt != 0 && rs == rt) { - /* OPC_BLTZC */ - tcg_gen_brcondi_tl(tcg_invert_cond(TCG_COND_LT), t1, 0, fs); - } else { - /* OPC_BLTC */ - tcg_gen_brcond_tl(tcg_invert_cond(TCG_COND_LT), t0, t1, fs); - } - break; - case OPC_BOVC: /* OPC_BEQZALC, OPC_BEQC */ - case OPC_BNVC: /* OPC_BNEZALC, OPC_BNEC */ - if (rs >= rt) { - /* OPC_BOVC, OPC_BNVC */ - TCGv t2 = tcg_temp_new(); - TCGv t3 = tcg_temp_new(); - TCGv t4 = tcg_temp_new(); - TCGv input_overflow = tcg_temp_new(); - - gen_load_gpr(t0, rs); - gen_load_gpr(t1, rt); - tcg_gen_ext32s_tl(t2, t0); - tcg_gen_setcond_tl(TCG_COND_NE, input_overflow, t2, t0); - tcg_gen_ext32s_tl(t3, t1); - tcg_gen_setcond_tl(TCG_COND_NE, t4, t3, t1); - tcg_gen_or_tl(input_overflow, input_overflow, t4); - - tcg_gen_add_tl(t4, t2, t3); - tcg_gen_ext32s_tl(t4, t4); - tcg_gen_xor_tl(t2, t2, t3); - tcg_gen_xor_tl(t3, t4, t3); - tcg_gen_andc_tl(t2, t3, t2); - tcg_gen_setcondi_tl(TCG_COND_LT, t4, t2, 0); - tcg_gen_or_tl(t4, t4, input_overflow); - if (opc == OPC_BOVC) { - /* OPC_BOVC */ - tcg_gen_brcondi_tl(tcg_invert_cond(TCG_COND_NE), t4, 0, fs); - } else { - /* OPC_BNVC */ - tcg_gen_brcondi_tl(tcg_invert_cond(TCG_COND_EQ), t4, 0, fs); - } - tcg_temp_free(input_overflow); - tcg_temp_free(t4); - tcg_temp_free(t3); - tcg_temp_free(t2); - } else if (rs < rt && rs == 0) { - /* OPC_BEQZALC, OPC_BNEZALC */ - if (opc == OPC_BEQZALC) { - /* OPC_BEQZALC */ - tcg_gen_brcondi_tl(tcg_invert_cond(TCG_COND_EQ), t1, 0, fs); - } else { - /* OPC_BNEZALC */ - tcg_gen_brcondi_tl(tcg_invert_cond(TCG_COND_NE), t1, 0, fs); - } - } else { - /* OPC_BEQC, OPC_BNEC */ - if (opc == OPC_BEQC) { - /* OPC_BEQC */ - tcg_gen_brcond_tl(tcg_invert_cond(TCG_COND_EQ), t0, t1, fs); - } else { - /* OPC_BNEC */ - tcg_gen_brcond_tl(tcg_invert_cond(TCG_COND_NE), t0, t1, fs); - } - } - break; - case OPC_BEQZC: - tcg_gen_brcondi_tl(tcg_invert_cond(TCG_COND_EQ), t0, 0, fs); - break; - case OPC_BNEZC: - tcg_gen_brcondi_tl(tcg_invert_cond(TCG_COND_NE), t0, 0, fs); - break; - default: - MIPS_INVAL("Compact conditional branch/jump"); - generate_exception(ctx, EXCP_RI); - goto out; - } - - /* Generating branch here as compact branches don't have delay slot */ - gen_goto_tb(ctx, 1, ctx->btarget); - gen_set_label(fs); - - ctx->hflags |= MIPS_HFLAG_FBNSLOT; - MIPS_DEBUG("Compact conditional branch"); - } - -out: - tcg_temp_free(t0); - tcg_temp_free(t1); -} - static void decode_opc_special_r6(CPUMIPSState *env, DisasContext *ctx) { int rs, rt, rd, sa; 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