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/*
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* Xilinx MicroBlaze emulation for qemu: main translation routines.
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*
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* Copyright (c) 2009 Edgar E. Iglesias.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, see <http://www.gnu.org/licenses/>.
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*/
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#include "cpu.h" |
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#include "disas.h" |
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#include "tcg-op.h" |
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#include "helper.h" |
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#include "microblaze-decode.h" |
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#define GEN_HELPER 1 |
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#include "helper.h" |
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#define SIM_COMPAT 0 |
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#define DISAS_GNU 1 |
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#define DISAS_MB 1 |
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#if DISAS_MB && !SIM_COMPAT
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# define LOG_DIS(...) qemu_log_mask(CPU_LOG_TB_IN_ASM, ## __VA_ARGS__) |
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#else
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# define LOG_DIS(...) do { } while (0) |
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#endif
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#define D(x)
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#define EXTRACT_FIELD(src, start, end) \
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(((src) >> start) & ((1 << (end - start + 1)) - 1)) |
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static TCGv env_debug;
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static TCGv_ptr cpu_env;
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static TCGv cpu_R[32]; |
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static TCGv cpu_SR[18]; |
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static TCGv env_imm;
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static TCGv env_btaken;
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static TCGv env_btarget;
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static TCGv env_iflags;
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#include "gen-icount.h" |
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/* This is the state at translation time. */
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typedef struct DisasContext { |
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CPUState *env; |
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target_ulong pc; |
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/* Decoder. */
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int type_b;
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uint32_t ir; |
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uint8_t opcode; |
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uint8_t rd, ra, rb; |
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uint16_t imm; |
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unsigned int cpustate_changed; |
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unsigned int delayed_branch; |
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unsigned int tb_flags, synced_flags; /* tb dependent flags. */ |
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unsigned int clear_imm; |
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int is_jmp;
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#define JMP_NOJMP 0 |
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#define JMP_DIRECT 1 |
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#define JMP_DIRECT_CC 2 |
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#define JMP_INDIRECT 3 |
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unsigned int jmp; |
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uint32_t jmp_pc; |
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int abort_at_next_insn;
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int nr_nops;
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struct TranslationBlock *tb;
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int singlestep_enabled;
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} DisasContext; |
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static const char *regnames[] = |
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{ |
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"r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7", |
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"r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15", |
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"r16", "r17", "r18", "r19", "r20", "r21", "r22", "r23", |
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"r24", "r25", "r26", "r27", "r28", "r29", "r30", "r31", |
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}; |
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static const char *special_regnames[] = |
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{ |
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"rpc", "rmsr", "sr2", "sr3", "sr4", "sr5", "sr6", "sr7", |
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"sr8", "sr9", "sr10", "sr11", "sr12", "sr13", "sr14", "sr15", |
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"sr16", "sr17", "sr18" |
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}; |
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/* Sign extend at translation time. */
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static inline int sign_extend(unsigned int val, unsigned int width) |
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{ |
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int sval;
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/* LSL. */
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val <<= 31 - width;
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sval = val; |
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/* ASR. */
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sval >>= 31 - width;
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return sval;
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} |
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static inline void t_sync_flags(DisasContext *dc) |
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{ |
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/* Synch the tb dependent flags between translator and runtime. */
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if (dc->tb_flags != dc->synced_flags) {
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tcg_gen_movi_tl(env_iflags, dc->tb_flags); |
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dc->synced_flags = dc->tb_flags; |
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} |
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} |
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static inline void t_gen_raise_exception(DisasContext *dc, uint32_t index) |
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{ |
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TCGv_i32 tmp = tcg_const_i32(index); |
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t_sync_flags(dc); |
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tcg_gen_movi_tl(cpu_SR[SR_PC], dc->pc); |
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gen_helper_raise_exception(tmp); |
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tcg_temp_free_i32(tmp); |
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dc->is_jmp = DISAS_UPDATE; |
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} |
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static void gen_goto_tb(DisasContext *dc, int n, target_ulong dest) |
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{ |
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TranslationBlock *tb; |
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tb = dc->tb; |
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if ((tb->pc & TARGET_PAGE_MASK) == (dest & TARGET_PAGE_MASK)) {
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tcg_gen_goto_tb(n); |
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tcg_gen_movi_tl(cpu_SR[SR_PC], dest); |
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tcg_gen_exit_tb((tcg_target_long)tb + n); |
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} else {
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tcg_gen_movi_tl(cpu_SR[SR_PC], dest); |
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tcg_gen_exit_tb(0);
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} |
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} |
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static void read_carry(DisasContext *dc, TCGv d) |
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{ |
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tcg_gen_shri_tl(d, cpu_SR[SR_MSR], 31);
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} |
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static void write_carry(DisasContext *dc, TCGv v) |
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{ |
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TCGv t0 = tcg_temp_new(); |
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tcg_gen_shli_tl(t0, v, 31);
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tcg_gen_sari_tl(t0, t0, 31);
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tcg_gen_andi_tl(t0, t0, (MSR_C | MSR_CC)); |
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tcg_gen_andi_tl(cpu_SR[SR_MSR], cpu_SR[SR_MSR], |
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~(MSR_C | MSR_CC)); |
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tcg_gen_or_tl(cpu_SR[SR_MSR], cpu_SR[SR_MSR], t0); |
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tcg_temp_free(t0); |
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} |
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/* True if ALU operand b is a small immediate that may deserve
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faster treatment. */
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static inline int dec_alu_op_b_is_small_imm(DisasContext *dc) |
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{ |
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/* Immediate insn without the imm prefix ? */
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return dc->type_b && !(dc->tb_flags & IMM_FLAG);
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} |
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static inline TCGv *dec_alu_op_b(DisasContext *dc) |
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{ |
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if (dc->type_b) {
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if (dc->tb_flags & IMM_FLAG)
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tcg_gen_ori_tl(env_imm, env_imm, dc->imm); |
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else
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tcg_gen_movi_tl(env_imm, (int32_t)((int16_t)dc->imm)); |
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return &env_imm;
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} else
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return &cpu_R[dc->rb];
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} |
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static void dec_add(DisasContext *dc) |
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{ |
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unsigned int k, c; |
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TCGv cf; |
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k = dc->opcode & 4;
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c = dc->opcode & 2;
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LOG_DIS("add%s%s%s r%d r%d r%d\n",
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dc->type_b ? "i" : "", k ? "k" : "", c ? "c" : "", |
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dc->rd, dc->ra, dc->rb); |
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/* Take care of the easy cases first. */
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if (k) {
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/* k - keep carry, no need to update MSR. */
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/* If rd == r0, it's a nop. */
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if (dc->rd) {
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tcg_gen_add_tl(cpu_R[dc->rd], cpu_R[dc->ra], *(dec_alu_op_b(dc))); |
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if (c) {
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/* c - Add carry into the result. */
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cf = tcg_temp_new(); |
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read_carry(dc, cf); |
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tcg_gen_add_tl(cpu_R[dc->rd], cpu_R[dc->rd], cf); |
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tcg_temp_free(cf); |
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} |
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} |
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return;
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} |
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/* From now on, we can assume k is zero. So we need to update MSR. */
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/* Extract carry. */
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cf = tcg_temp_new(); |
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if (c) {
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read_carry(dc, cf); |
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} else {
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tcg_gen_movi_tl(cf, 0);
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} |
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if (dc->rd) {
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TCGv ncf = tcg_temp_new(); |
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gen_helper_carry(ncf, cpu_R[dc->ra], *(dec_alu_op_b(dc)), cf); |
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tcg_gen_add_tl(cpu_R[dc->rd], cpu_R[dc->ra], *(dec_alu_op_b(dc))); |
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tcg_gen_add_tl(cpu_R[dc->rd], cpu_R[dc->rd], cf); |
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write_carry(dc, ncf); |
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tcg_temp_free(ncf); |
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} else {
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gen_helper_carry(cf, cpu_R[dc->ra], *(dec_alu_op_b(dc)), cf); |
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write_carry(dc, cf); |
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} |
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tcg_temp_free(cf); |
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} |
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static void dec_sub(DisasContext *dc) |
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{ |
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unsigned int u, cmp, k, c; |
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TCGv cf, na; |
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u = dc->imm & 2;
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k = dc->opcode & 4;
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c = dc->opcode & 2;
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cmp = (dc->imm & 1) && (!dc->type_b) && k;
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if (cmp) {
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LOG_DIS("cmp%s r%d, r%d ir=%x\n", u ? "u" : "", dc->rd, dc->ra, dc->ir); |
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if (dc->rd) {
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if (u)
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gen_helper_cmpu(cpu_R[dc->rd], cpu_R[dc->ra], cpu_R[dc->rb]); |
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else
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gen_helper_cmp(cpu_R[dc->rd], cpu_R[dc->ra], cpu_R[dc->rb]); |
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} |
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return;
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} |
258 |
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LOG_DIS("sub%s%s r%d, r%d r%d\n",
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k ? "k" : "", c ? "c" : "", dc->rd, dc->ra, dc->rb); |
261 |
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/* Take care of the easy cases first. */
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if (k) {
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/* k - keep carry, no need to update MSR. */
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/* If rd == r0, it's a nop. */
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if (dc->rd) {
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tcg_gen_sub_tl(cpu_R[dc->rd], *(dec_alu_op_b(dc)), cpu_R[dc->ra]); |
268 |
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if (c) {
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/* c - Add carry into the result. */
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cf = tcg_temp_new(); |
272 |
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read_carry(dc, cf); |
274 |
tcg_gen_add_tl(cpu_R[dc->rd], cpu_R[dc->rd], cf); |
275 |
tcg_temp_free(cf); |
276 |
} |
277 |
} |
278 |
return;
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} |
280 |
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/* From now on, we can assume k is zero. So we need to update MSR. */
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/* Extract carry. And complement a into na. */
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cf = tcg_temp_new(); |
284 |
na = tcg_temp_new(); |
285 |
if (c) {
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read_carry(dc, cf); |
287 |
} else {
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tcg_gen_movi_tl(cf, 1);
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} |
290 |
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/* d = b + ~a + c. carry defaults to 1. */
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tcg_gen_not_tl(na, cpu_R[dc->ra]); |
293 |
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if (dc->rd) {
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TCGv ncf = tcg_temp_new(); |
296 |
gen_helper_carry(ncf, na, *(dec_alu_op_b(dc)), cf); |
297 |
tcg_gen_add_tl(cpu_R[dc->rd], na, *(dec_alu_op_b(dc))); |
298 |
tcg_gen_add_tl(cpu_R[dc->rd], cpu_R[dc->rd], cf); |
299 |
write_carry(dc, ncf); |
300 |
tcg_temp_free(ncf); |
301 |
} else {
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gen_helper_carry(cf, na, *(dec_alu_op_b(dc)), cf); |
303 |
write_carry(dc, cf); |
304 |
} |
305 |
tcg_temp_free(cf); |
306 |
tcg_temp_free(na); |
307 |
} |
308 |
|
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static void dec_pattern(DisasContext *dc) |
310 |
{ |
311 |
unsigned int mode; |
312 |
int l1;
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if ((dc->tb_flags & MSR_EE_FLAG)
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&& (dc->env->pvr.regs[2] & PVR2_ILL_OPCODE_EXC_MASK)
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&& !((dc->env->pvr.regs[2] & PVR2_USE_PCMP_INSTR))) {
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317 |
tcg_gen_movi_tl(cpu_SR[SR_ESR], ESR_EC_ILLEGAL_OP); |
318 |
t_gen_raise_exception(dc, EXCP_HW_EXCP); |
319 |
} |
320 |
|
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mode = dc->opcode & 3;
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322 |
switch (mode) {
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323 |
case 0: |
324 |
/* pcmpbf. */
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LOG_DIS("pcmpbf r%d r%d r%d\n", dc->rd, dc->ra, dc->rb);
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if (dc->rd)
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gen_helper_pcmpbf(cpu_R[dc->rd], cpu_R[dc->ra], cpu_R[dc->rb]); |
328 |
break;
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case 2: |
330 |
LOG_DIS("pcmpeq r%d r%d r%d\n", dc->rd, dc->ra, dc->rb);
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if (dc->rd) {
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332 |
TCGv t0 = tcg_temp_local_new(); |
333 |
l1 = gen_new_label(); |
334 |
tcg_gen_movi_tl(t0, 1);
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335 |
tcg_gen_brcond_tl(TCG_COND_EQ, |
336 |
cpu_R[dc->ra], cpu_R[dc->rb], l1); |
337 |
tcg_gen_movi_tl(t0, 0);
|
338 |
gen_set_label(l1); |
339 |
tcg_gen_mov_tl(cpu_R[dc->rd], t0); |
340 |
tcg_temp_free(t0); |
341 |
} |
342 |
break;
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343 |
case 3: |
344 |
LOG_DIS("pcmpne r%d r%d r%d\n", dc->rd, dc->ra, dc->rb);
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345 |
l1 = gen_new_label(); |
346 |
if (dc->rd) {
|
347 |
TCGv t0 = tcg_temp_local_new(); |
348 |
tcg_gen_movi_tl(t0, 1);
|
349 |
tcg_gen_brcond_tl(TCG_COND_NE, |
350 |
cpu_R[dc->ra], cpu_R[dc->rb], l1); |
351 |
tcg_gen_movi_tl(t0, 0);
|
352 |
gen_set_label(l1); |
353 |
tcg_gen_mov_tl(cpu_R[dc->rd], t0); |
354 |
tcg_temp_free(t0); |
355 |
} |
356 |
break;
|
357 |
default:
|
358 |
cpu_abort(dc->env, |
359 |
"unsupported pattern insn opcode=%x\n", dc->opcode);
|
360 |
break;
|
361 |
} |
362 |
} |
363 |
|
364 |
static void dec_and(DisasContext *dc) |
365 |
{ |
366 |
unsigned int not; |
367 |
|
368 |
if (!dc->type_b && (dc->imm & (1 << 10))) { |
369 |
dec_pattern(dc); |
370 |
return;
|
371 |
} |
372 |
|
373 |
not = dc->opcode & (1 << 1); |
374 |
LOG_DIS("and%s\n", not ? "n" : ""); |
375 |
|
376 |
if (!dc->rd)
|
377 |
return;
|
378 |
|
379 |
if (not) {
|
380 |
TCGv t = tcg_temp_new(); |
381 |
tcg_gen_not_tl(t, *(dec_alu_op_b(dc))); |
382 |
tcg_gen_and_tl(cpu_R[dc->rd], cpu_R[dc->ra], t); |
383 |
tcg_temp_free(t); |
384 |
} else
|
385 |
tcg_gen_and_tl(cpu_R[dc->rd], cpu_R[dc->ra], *(dec_alu_op_b(dc))); |
386 |
} |
387 |
|
388 |
static void dec_or(DisasContext *dc) |
389 |
{ |
390 |
if (!dc->type_b && (dc->imm & (1 << 10))) { |
391 |
dec_pattern(dc); |
392 |
return;
|
393 |
} |
394 |
|
395 |
LOG_DIS("or r%d r%d r%d imm=%x\n", dc->rd, dc->ra, dc->rb, dc->imm);
|
396 |
if (dc->rd)
|
397 |
tcg_gen_or_tl(cpu_R[dc->rd], cpu_R[dc->ra], *(dec_alu_op_b(dc))); |
398 |
} |
399 |
|
400 |
static void dec_xor(DisasContext *dc) |
401 |
{ |
402 |
if (!dc->type_b && (dc->imm & (1 << 10))) { |
403 |
dec_pattern(dc); |
404 |
return;
|
405 |
} |
406 |
|
407 |
LOG_DIS("xor r%d\n", dc->rd);
|
408 |
if (dc->rd)
|
409 |
tcg_gen_xor_tl(cpu_R[dc->rd], cpu_R[dc->ra], *(dec_alu_op_b(dc))); |
410 |
} |
411 |
|
412 |
static inline void msr_read(DisasContext *dc, TCGv d) |
413 |
{ |
414 |
tcg_gen_mov_tl(d, cpu_SR[SR_MSR]); |
415 |
} |
416 |
|
417 |
static inline void msr_write(DisasContext *dc, TCGv v) |
418 |
{ |
419 |
TCGv t; |
420 |
|
421 |
t = tcg_temp_new(); |
422 |
dc->cpustate_changed = 1;
|
423 |
/* PVR bit is not writable. */
|
424 |
tcg_gen_andi_tl(t, v, ~MSR_PVR); |
425 |
tcg_gen_andi_tl(cpu_SR[SR_MSR], cpu_SR[SR_MSR], MSR_PVR); |
426 |
tcg_gen_or_tl(cpu_SR[SR_MSR], cpu_SR[SR_MSR], v); |
427 |
tcg_temp_free(t); |
428 |
} |
429 |
|
430 |
static void dec_msr(DisasContext *dc) |
431 |
{ |
432 |
TCGv t0, t1; |
433 |
unsigned int sr, to, rn; |
434 |
int mem_index = cpu_mmu_index(dc->env);
|
435 |
|
436 |
sr = dc->imm & ((1 << 14) - 1); |
437 |
to = dc->imm & (1 << 14); |
438 |
dc->type_b = 1;
|
439 |
if (to)
|
440 |
dc->cpustate_changed = 1;
|
441 |
|
442 |
/* msrclr and msrset. */
|
443 |
if (!(dc->imm & (1 << 15))) { |
444 |
unsigned int clr = dc->ir & (1 << 16); |
445 |
|
446 |
LOG_DIS("msr%s r%d imm=%x\n", clr ? "clr" : "set", |
447 |
dc->rd, dc->imm); |
448 |
|
449 |
if (!(dc->env->pvr.regs[2] & PVR2_USE_MSR_INSTR)) { |
450 |
/* nop??? */
|
451 |
return;
|
452 |
} |
453 |
|
454 |
if ((dc->tb_flags & MSR_EE_FLAG)
|
455 |
&& mem_index == MMU_USER_IDX && (dc->imm != 4 && dc->imm != 0)) { |
456 |
tcg_gen_movi_tl(cpu_SR[SR_ESR], ESR_EC_PRIVINSN); |
457 |
t_gen_raise_exception(dc, EXCP_HW_EXCP); |
458 |
return;
|
459 |
} |
460 |
|
461 |
if (dc->rd)
|
462 |
msr_read(dc, cpu_R[dc->rd]); |
463 |
|
464 |
t0 = tcg_temp_new(); |
465 |
t1 = tcg_temp_new(); |
466 |
msr_read(dc, t0); |
467 |
tcg_gen_mov_tl(t1, *(dec_alu_op_b(dc))); |
468 |
|
469 |
if (clr) {
|
470 |
tcg_gen_not_tl(t1, t1); |
471 |
tcg_gen_and_tl(t0, t0, t1); |
472 |
} else
|
473 |
tcg_gen_or_tl(t0, t0, t1); |
474 |
msr_write(dc, t0); |
475 |
tcg_temp_free(t0); |
476 |
tcg_temp_free(t1); |
477 |
tcg_gen_movi_tl(cpu_SR[SR_PC], dc->pc + 4);
|
478 |
dc->is_jmp = DISAS_UPDATE; |
479 |
return;
|
480 |
} |
481 |
|
482 |
if (to) {
|
483 |
if ((dc->tb_flags & MSR_EE_FLAG)
|
484 |
&& mem_index == MMU_USER_IDX) { |
485 |
tcg_gen_movi_tl(cpu_SR[SR_ESR], ESR_EC_PRIVINSN); |
486 |
t_gen_raise_exception(dc, EXCP_HW_EXCP); |
487 |
return;
|
488 |
} |
489 |
} |
490 |
|
491 |
#if !defined(CONFIG_USER_ONLY)
|
492 |
/* Catch read/writes to the mmu block. */
|
493 |
if ((sr & ~0xff) == 0x1000) { |
494 |
sr &= 7;
|
495 |
LOG_DIS("m%ss sr%d r%d imm=%x\n", to ? "t" : "f", sr, dc->ra, dc->imm); |
496 |
if (to)
|
497 |
gen_helper_mmu_write(tcg_const_tl(sr), cpu_R[dc->ra]); |
498 |
else
|
499 |
gen_helper_mmu_read(cpu_R[dc->rd], tcg_const_tl(sr)); |
500 |
return;
|
501 |
} |
502 |
#endif
|
503 |
|
504 |
if (to) {
|
505 |
LOG_DIS("m%ss sr%x r%d imm=%x\n", to ? "t" : "f", sr, dc->ra, dc->imm); |
506 |
switch (sr) {
|
507 |
case 0: |
508 |
break;
|
509 |
case 1: |
510 |
msr_write(dc, cpu_R[dc->ra]); |
511 |
break;
|
512 |
case 0x3: |
513 |
tcg_gen_mov_tl(cpu_SR[SR_EAR], cpu_R[dc->ra]); |
514 |
break;
|
515 |
case 0x5: |
516 |
tcg_gen_mov_tl(cpu_SR[SR_ESR], cpu_R[dc->ra]); |
517 |
break;
|
518 |
case 0x7: |
519 |
tcg_gen_andi_tl(cpu_SR[SR_FSR], cpu_R[dc->ra], 31);
|
520 |
break;
|
521 |
case 0x800: |
522 |
tcg_gen_st_tl(cpu_R[dc->ra], cpu_env, offsetof(CPUState, slr)); |
523 |
break;
|
524 |
case 0x802: |
525 |
tcg_gen_st_tl(cpu_R[dc->ra], cpu_env, offsetof(CPUState, shr)); |
526 |
break;
|
527 |
default:
|
528 |
cpu_abort(dc->env, "unknown mts reg %x\n", sr);
|
529 |
break;
|
530 |
} |
531 |
} else {
|
532 |
LOG_DIS("m%ss r%d sr%x imm=%x\n", to ? "t" : "f", dc->rd, sr, dc->imm); |
533 |
|
534 |
switch (sr) {
|
535 |
case 0: |
536 |
tcg_gen_movi_tl(cpu_R[dc->rd], dc->pc); |
537 |
break;
|
538 |
case 1: |
539 |
msr_read(dc, cpu_R[dc->rd]); |
540 |
break;
|
541 |
case 0x3: |
542 |
tcg_gen_mov_tl(cpu_R[dc->rd], cpu_SR[SR_EAR]); |
543 |
break;
|
544 |
case 0x5: |
545 |
tcg_gen_mov_tl(cpu_R[dc->rd], cpu_SR[SR_ESR]); |
546 |
break;
|
547 |
case 0x7: |
548 |
tcg_gen_mov_tl(cpu_R[dc->rd], cpu_SR[SR_FSR]); |
549 |
break;
|
550 |
case 0xb: |
551 |
tcg_gen_mov_tl(cpu_R[dc->rd], cpu_SR[SR_BTR]); |
552 |
break;
|
553 |
case 0x800: |
554 |
tcg_gen_ld_tl(cpu_R[dc->rd], cpu_env, offsetof(CPUState, slr)); |
555 |
break;
|
556 |
case 0x802: |
557 |
tcg_gen_ld_tl(cpu_R[dc->rd], cpu_env, offsetof(CPUState, shr)); |
558 |
break;
|
559 |
case 0x2000: |
560 |
case 0x2001: |
561 |
case 0x2002: |
562 |
case 0x2003: |
563 |
case 0x2004: |
564 |
case 0x2005: |
565 |
case 0x2006: |
566 |
case 0x2007: |
567 |
case 0x2008: |
568 |
case 0x2009: |
569 |
case 0x200a: |
570 |
case 0x200b: |
571 |
case 0x200c: |
572 |
rn = sr & 0xf;
|
573 |
tcg_gen_ld_tl(cpu_R[dc->rd], |
574 |
cpu_env, offsetof(CPUState, pvr.regs[rn])); |
575 |
break;
|
576 |
default:
|
577 |
cpu_abort(dc->env, "unknown mfs reg %x\n", sr);
|
578 |
break;
|
579 |
} |
580 |
} |
581 |
|
582 |
if (dc->rd == 0) { |
583 |
tcg_gen_movi_tl(cpu_R[0], 0); |
584 |
} |
585 |
} |
586 |
|
587 |
/* 64-bit signed mul, lower result in d and upper in d2. */
|
588 |
static void t_gen_muls(TCGv d, TCGv d2, TCGv a, TCGv b) |
589 |
{ |
590 |
TCGv_i64 t0, t1; |
591 |
|
592 |
t0 = tcg_temp_new_i64(); |
593 |
t1 = tcg_temp_new_i64(); |
594 |
|
595 |
tcg_gen_ext_i32_i64(t0, a); |
596 |
tcg_gen_ext_i32_i64(t1, b); |
597 |
tcg_gen_mul_i64(t0, t0, t1); |
598 |
|
599 |
tcg_gen_trunc_i64_i32(d, t0); |
600 |
tcg_gen_shri_i64(t0, t0, 32);
|
601 |
tcg_gen_trunc_i64_i32(d2, t0); |
602 |
|
603 |
tcg_temp_free_i64(t0); |
604 |
tcg_temp_free_i64(t1); |
605 |
} |
606 |
|
607 |
/* 64-bit unsigned muls, lower result in d and upper in d2. */
|
608 |
static void t_gen_mulu(TCGv d, TCGv d2, TCGv a, TCGv b) |
609 |
{ |
610 |
TCGv_i64 t0, t1; |
611 |
|
612 |
t0 = tcg_temp_new_i64(); |
613 |
t1 = tcg_temp_new_i64(); |
614 |
|
615 |
tcg_gen_extu_i32_i64(t0, a); |
616 |
tcg_gen_extu_i32_i64(t1, b); |
617 |
tcg_gen_mul_i64(t0, t0, t1); |
618 |
|
619 |
tcg_gen_trunc_i64_i32(d, t0); |
620 |
tcg_gen_shri_i64(t0, t0, 32);
|
621 |
tcg_gen_trunc_i64_i32(d2, t0); |
622 |
|
623 |
tcg_temp_free_i64(t0); |
624 |
tcg_temp_free_i64(t1); |
625 |
} |
626 |
|
627 |
/* Multiplier unit. */
|
628 |
static void dec_mul(DisasContext *dc) |
629 |
{ |
630 |
TCGv d[2];
|
631 |
unsigned int subcode; |
632 |
|
633 |
if ((dc->tb_flags & MSR_EE_FLAG)
|
634 |
&& (dc->env->pvr.regs[2] & PVR2_ILL_OPCODE_EXC_MASK)
|
635 |
&& !(dc->env->pvr.regs[0] & PVR0_USE_HW_MUL_MASK)) {
|
636 |
tcg_gen_movi_tl(cpu_SR[SR_ESR], ESR_EC_ILLEGAL_OP); |
637 |
t_gen_raise_exception(dc, EXCP_HW_EXCP); |
638 |
return;
|
639 |
} |
640 |
|
641 |
subcode = dc->imm & 3;
|
642 |
d[0] = tcg_temp_new();
|
643 |
d[1] = tcg_temp_new();
|
644 |
|
645 |
if (dc->type_b) {
|
646 |
LOG_DIS("muli r%d r%d %x\n", dc->rd, dc->ra, dc->imm);
|
647 |
t_gen_mulu(cpu_R[dc->rd], d[1], cpu_R[dc->ra], *(dec_alu_op_b(dc)));
|
648 |
goto done;
|
649 |
} |
650 |
|
651 |
/* mulh, mulhsu and mulhu are not available if C_USE_HW_MUL is < 2. */
|
652 |
if (subcode >= 1 && subcode <= 3 |
653 |
&& !((dc->env->pvr.regs[2] & PVR2_USE_MUL64_MASK))) {
|
654 |
/* nop??? */
|
655 |
} |
656 |
|
657 |
switch (subcode) {
|
658 |
case 0: |
659 |
LOG_DIS("mul r%d r%d r%d\n", dc->rd, dc->ra, dc->rb);
|
660 |
t_gen_mulu(cpu_R[dc->rd], d[1], cpu_R[dc->ra], cpu_R[dc->rb]);
|
661 |
break;
|
662 |
case 1: |
663 |
LOG_DIS("mulh r%d r%d r%d\n", dc->rd, dc->ra, dc->rb);
|
664 |
t_gen_muls(d[0], cpu_R[dc->rd], cpu_R[dc->ra], cpu_R[dc->rb]);
|
665 |
break;
|
666 |
case 2: |
667 |
LOG_DIS("mulhsu r%d r%d r%d\n", dc->rd, dc->ra, dc->rb);
|
668 |
t_gen_muls(d[0], cpu_R[dc->rd], cpu_R[dc->ra], cpu_R[dc->rb]);
|
669 |
break;
|
670 |
case 3: |
671 |
LOG_DIS("mulhu r%d r%d r%d\n", dc->rd, dc->ra, dc->rb);
|
672 |
t_gen_mulu(d[0], cpu_R[dc->rd], cpu_R[dc->ra], cpu_R[dc->rb]);
|
673 |
break;
|
674 |
default:
|
675 |
cpu_abort(dc->env, "unknown MUL insn %x\n", subcode);
|
676 |
break;
|
677 |
} |
678 |
done:
|
679 |
tcg_temp_free(d[0]);
|
680 |
tcg_temp_free(d[1]);
|
681 |
} |
682 |
|
683 |
/* Div unit. */
|
684 |
static void dec_div(DisasContext *dc) |
685 |
{ |
686 |
unsigned int u; |
687 |
|
688 |
u = dc->imm & 2;
|
689 |
LOG_DIS("div\n");
|
690 |
|
691 |
if ((dc->env->pvr.regs[2] & PVR2_ILL_OPCODE_EXC_MASK) |
692 |
&& !((dc->env->pvr.regs[0] & PVR0_USE_DIV_MASK))) {
|
693 |
tcg_gen_movi_tl(cpu_SR[SR_ESR], ESR_EC_ILLEGAL_OP); |
694 |
t_gen_raise_exception(dc, EXCP_HW_EXCP); |
695 |
} |
696 |
|
697 |
if (u)
|
698 |
gen_helper_divu(cpu_R[dc->rd], *(dec_alu_op_b(dc)), cpu_R[dc->ra]); |
699 |
else
|
700 |
gen_helper_divs(cpu_R[dc->rd], *(dec_alu_op_b(dc)), cpu_R[dc->ra]); |
701 |
if (!dc->rd)
|
702 |
tcg_gen_movi_tl(cpu_R[dc->rd], 0);
|
703 |
} |
704 |
|
705 |
static void dec_barrel(DisasContext *dc) |
706 |
{ |
707 |
TCGv t0; |
708 |
unsigned int s, t; |
709 |
|
710 |
if ((dc->tb_flags & MSR_EE_FLAG)
|
711 |
&& (dc->env->pvr.regs[2] & PVR2_ILL_OPCODE_EXC_MASK)
|
712 |
&& !(dc->env->pvr.regs[0] & PVR0_USE_BARREL_MASK)) {
|
713 |
tcg_gen_movi_tl(cpu_SR[SR_ESR], ESR_EC_ILLEGAL_OP); |
714 |
t_gen_raise_exception(dc, EXCP_HW_EXCP); |
715 |
return;
|
716 |
} |
717 |
|
718 |
s = dc->imm & (1 << 10); |
719 |
t = dc->imm & (1 << 9); |
720 |
|
721 |
LOG_DIS("bs%s%s r%d r%d r%d\n",
|
722 |
s ? "l" : "r", t ? "a" : "l", dc->rd, dc->ra, dc->rb); |
723 |
|
724 |
t0 = tcg_temp_new(); |
725 |
|
726 |
tcg_gen_mov_tl(t0, *(dec_alu_op_b(dc))); |
727 |
tcg_gen_andi_tl(t0, t0, 31);
|
728 |
|
729 |
if (s)
|
730 |
tcg_gen_shl_tl(cpu_R[dc->rd], cpu_R[dc->ra], t0); |
731 |
else {
|
732 |
if (t)
|
733 |
tcg_gen_sar_tl(cpu_R[dc->rd], cpu_R[dc->ra], t0); |
734 |
else
|
735 |
tcg_gen_shr_tl(cpu_R[dc->rd], cpu_R[dc->ra], t0); |
736 |
} |
737 |
} |
738 |
|
739 |
static void dec_bit(DisasContext *dc) |
740 |
{ |
741 |
TCGv t0, t1; |
742 |
unsigned int op; |
743 |
int mem_index = cpu_mmu_index(dc->env);
|
744 |
|
745 |
op = dc->ir & ((1 << 8) - 1); |
746 |
switch (op) {
|
747 |
case 0x21: |
748 |
/* src. */
|
749 |
t0 = tcg_temp_new(); |
750 |
|
751 |
LOG_DIS("src r%d r%d\n", dc->rd, dc->ra);
|
752 |
tcg_gen_andi_tl(t0, cpu_R[dc->ra], 1);
|
753 |
if (dc->rd) {
|
754 |
t1 = tcg_temp_new(); |
755 |
read_carry(dc, t1); |
756 |
tcg_gen_shli_tl(t1, t1, 31);
|
757 |
|
758 |
tcg_gen_shri_tl(cpu_R[dc->rd], cpu_R[dc->ra], 1);
|
759 |
tcg_gen_or_tl(cpu_R[dc->rd], cpu_R[dc->rd], t1); |
760 |
tcg_temp_free(t1); |
761 |
} |
762 |
|
763 |
/* Update carry. */
|
764 |
write_carry(dc, t0); |
765 |
tcg_temp_free(t0); |
766 |
break;
|
767 |
|
768 |
case 0x1: |
769 |
case 0x41: |
770 |
/* srl. */
|
771 |
t0 = tcg_temp_new(); |
772 |
LOG_DIS("srl r%d r%d\n", dc->rd, dc->ra);
|
773 |
|
774 |
/* Update carry. */
|
775 |
tcg_gen_andi_tl(t0, cpu_R[dc->ra], 1);
|
776 |
write_carry(dc, t0); |
777 |
tcg_temp_free(t0); |
778 |
if (dc->rd) {
|
779 |
if (op == 0x41) |
780 |
tcg_gen_shri_tl(cpu_R[dc->rd], cpu_R[dc->ra], 1);
|
781 |
else
|
782 |
tcg_gen_sari_tl(cpu_R[dc->rd], cpu_R[dc->ra], 1);
|
783 |
} |
784 |
break;
|
785 |
case 0x60: |
786 |
LOG_DIS("ext8s r%d r%d\n", dc->rd, dc->ra);
|
787 |
tcg_gen_ext8s_i32(cpu_R[dc->rd], cpu_R[dc->ra]); |
788 |
break;
|
789 |
case 0x61: |
790 |
LOG_DIS("ext16s r%d r%d\n", dc->rd, dc->ra);
|
791 |
tcg_gen_ext16s_i32(cpu_R[dc->rd], cpu_R[dc->ra]); |
792 |
break;
|
793 |
case 0x64: |
794 |
case 0x66: |
795 |
case 0x74: |
796 |
case 0x76: |
797 |
/* wdc. */
|
798 |
LOG_DIS("wdc r%d\n", dc->ra);
|
799 |
if ((dc->tb_flags & MSR_EE_FLAG)
|
800 |
&& mem_index == MMU_USER_IDX) { |
801 |
tcg_gen_movi_tl(cpu_SR[SR_ESR], ESR_EC_PRIVINSN); |
802 |
t_gen_raise_exception(dc, EXCP_HW_EXCP); |
803 |
return;
|
804 |
} |
805 |
break;
|
806 |
case 0x68: |
807 |
/* wic. */
|
808 |
LOG_DIS("wic r%d\n", dc->ra);
|
809 |
if ((dc->tb_flags & MSR_EE_FLAG)
|
810 |
&& mem_index == MMU_USER_IDX) { |
811 |
tcg_gen_movi_tl(cpu_SR[SR_ESR], ESR_EC_PRIVINSN); |
812 |
t_gen_raise_exception(dc, EXCP_HW_EXCP); |
813 |
return;
|
814 |
} |
815 |
break;
|
816 |
case 0xe0: |
817 |
if ((dc->tb_flags & MSR_EE_FLAG)
|
818 |
&& (dc->env->pvr.regs[2] & PVR2_ILL_OPCODE_EXC_MASK)
|
819 |
&& !((dc->env->pvr.regs[2] & PVR2_USE_PCMP_INSTR))) {
|
820 |
tcg_gen_movi_tl(cpu_SR[SR_ESR], ESR_EC_ILLEGAL_OP); |
821 |
t_gen_raise_exception(dc, EXCP_HW_EXCP); |
822 |
} |
823 |
if (dc->env->pvr.regs[2] & PVR2_USE_PCMP_INSTR) { |
824 |
gen_helper_clz(cpu_R[dc->rd], cpu_R[dc->ra]); |
825 |
} |
826 |
break;
|
827 |
default:
|
828 |
cpu_abort(dc->env, "unknown bit oc=%x op=%x rd=%d ra=%d rb=%d\n",
|
829 |
dc->pc, op, dc->rd, dc->ra, dc->rb); |
830 |
break;
|
831 |
} |
832 |
} |
833 |
|
834 |
static inline void sync_jmpstate(DisasContext *dc) |
835 |
{ |
836 |
if (dc->jmp == JMP_DIRECT || dc->jmp == JMP_DIRECT_CC) {
|
837 |
if (dc->jmp == JMP_DIRECT) {
|
838 |
tcg_gen_movi_tl(env_btaken, 1);
|
839 |
} |
840 |
dc->jmp = JMP_INDIRECT; |
841 |
tcg_gen_movi_tl(env_btarget, dc->jmp_pc); |
842 |
} |
843 |
} |
844 |
|
845 |
static void dec_imm(DisasContext *dc) |
846 |
{ |
847 |
LOG_DIS("imm %x\n", dc->imm << 16); |
848 |
tcg_gen_movi_tl(env_imm, (dc->imm << 16));
|
849 |
dc->tb_flags |= IMM_FLAG; |
850 |
dc->clear_imm = 0;
|
851 |
} |
852 |
|
853 |
static inline void gen_load(DisasContext *dc, TCGv dst, TCGv addr, |
854 |
unsigned int size) |
855 |
{ |
856 |
int mem_index = cpu_mmu_index(dc->env);
|
857 |
|
858 |
if (size == 1) { |
859 |
tcg_gen_qemu_ld8u(dst, addr, mem_index); |
860 |
} else if (size == 2) { |
861 |
tcg_gen_qemu_ld16u(dst, addr, mem_index); |
862 |
} else if (size == 4) { |
863 |
tcg_gen_qemu_ld32u(dst, addr, mem_index); |
864 |
} else
|
865 |
cpu_abort(dc->env, "Incorrect load size %d\n", size);
|
866 |
} |
867 |
|
868 |
static inline TCGv *compute_ldst_addr(DisasContext *dc, TCGv *t) |
869 |
{ |
870 |
unsigned int extimm = dc->tb_flags & IMM_FLAG; |
871 |
/* Should be set to one if r1 is used by loadstores. */
|
872 |
int stackprot = 0; |
873 |
|
874 |
/* All load/stores use ra. */
|
875 |
if (dc->ra == 1) { |
876 |
stackprot = 1;
|
877 |
} |
878 |
|
879 |
/* Treat the common cases first. */
|
880 |
if (!dc->type_b) {
|
881 |
/* If any of the regs is r0, return a ptr to the other. */
|
882 |
if (dc->ra == 0) { |
883 |
return &cpu_R[dc->rb];
|
884 |
} else if (dc->rb == 0) { |
885 |
return &cpu_R[dc->ra];
|
886 |
} |
887 |
|
888 |
if (dc->rb == 1) { |
889 |
stackprot = 1;
|
890 |
} |
891 |
|
892 |
*t = tcg_temp_new(); |
893 |
tcg_gen_add_tl(*t, cpu_R[dc->ra], cpu_R[dc->rb]); |
894 |
|
895 |
if (stackprot) {
|
896 |
gen_helper_stackprot(*t); |
897 |
} |
898 |
return t;
|
899 |
} |
900 |
/* Immediate. */
|
901 |
if (!extimm) {
|
902 |
if (dc->imm == 0) { |
903 |
return &cpu_R[dc->ra];
|
904 |
} |
905 |
*t = tcg_temp_new(); |
906 |
tcg_gen_movi_tl(*t, (int32_t)((int16_t)dc->imm)); |
907 |
tcg_gen_add_tl(*t, cpu_R[dc->ra], *t); |
908 |
} else {
|
909 |
*t = tcg_temp_new(); |
910 |
tcg_gen_add_tl(*t, cpu_R[dc->ra], *(dec_alu_op_b(dc))); |
911 |
} |
912 |
|
913 |
if (stackprot) {
|
914 |
gen_helper_stackprot(*t); |
915 |
} |
916 |
return t;
|
917 |
} |
918 |
|
919 |
static inline void dec_byteswap(DisasContext *dc, TCGv dst, TCGv src, int size) |
920 |
{ |
921 |
if (size == 4) { |
922 |
tcg_gen_bswap32_tl(dst, src); |
923 |
} else if (size == 2) { |
924 |
TCGv t = tcg_temp_new(); |
925 |
|
926 |
/* bswap16 assumes the high bits are zero. */
|
927 |
tcg_gen_andi_tl(t, src, 0xffff);
|
928 |
tcg_gen_bswap16_tl(dst, t); |
929 |
tcg_temp_free(t); |
930 |
} else {
|
931 |
/* Ignore.
|
932 |
cpu_abort(dc->env, "Invalid ldst byteswap size %d\n", size);
|
933 |
*/
|
934 |
} |
935 |
} |
936 |
|
937 |
static void dec_load(DisasContext *dc) |
938 |
{ |
939 |
TCGv t, *addr; |
940 |
unsigned int size, rev = 0; |
941 |
|
942 |
size = 1 << (dc->opcode & 3); |
943 |
|
944 |
if (!dc->type_b) {
|
945 |
rev = (dc->ir >> 9) & 1; |
946 |
} |
947 |
|
948 |
if (size > 4 && (dc->tb_flags & MSR_EE_FLAG) |
949 |
&& (dc->env->pvr.regs[2] & PVR2_ILL_OPCODE_EXC_MASK)) {
|
950 |
tcg_gen_movi_tl(cpu_SR[SR_ESR], ESR_EC_ILLEGAL_OP); |
951 |
t_gen_raise_exception(dc, EXCP_HW_EXCP); |
952 |
return;
|
953 |
} |
954 |
|
955 |
LOG_DIS("l%d%s%s\n", size, dc->type_b ? "i" : "", rev ? "r" : ""); |
956 |
|
957 |
t_sync_flags(dc); |
958 |
addr = compute_ldst_addr(dc, &t); |
959 |
|
960 |
/*
|
961 |
* When doing reverse accesses we need to do two things.
|
962 |
*
|
963 |
* 1. Reverse the address wrt endianness.
|
964 |
* 2. Byteswap the data lanes on the way back into the CPU core.
|
965 |
*/
|
966 |
if (rev && size != 4) { |
967 |
/* Endian reverse the address. t is addr. */
|
968 |
switch (size) {
|
969 |
case 1: |
970 |
{ |
971 |
/* 00 -> 11
|
972 |
01 -> 10
|
973 |
10 -> 10
|
974 |
11 -> 00 */
|
975 |
TCGv low = tcg_temp_new(); |
976 |
|
977 |
/* Force addr into the temp. */
|
978 |
if (addr != &t) {
|
979 |
t = tcg_temp_new(); |
980 |
tcg_gen_mov_tl(t, *addr); |
981 |
addr = &t; |
982 |
} |
983 |
|
984 |
tcg_gen_andi_tl(low, t, 3);
|
985 |
tcg_gen_sub_tl(low, tcg_const_tl(3), low);
|
986 |
tcg_gen_andi_tl(t, t, ~3);
|
987 |
tcg_gen_or_tl(t, t, low); |
988 |
tcg_gen_mov_tl(env_imm, t); |
989 |
tcg_temp_free(low); |
990 |
break;
|
991 |
} |
992 |
|
993 |
case 2: |
994 |
/* 00 -> 10
|
995 |
10 -> 00. */
|
996 |
/* Force addr into the temp. */
|
997 |
if (addr != &t) {
|
998 |
t = tcg_temp_new(); |
999 |
tcg_gen_xori_tl(t, *addr, 2);
|
1000 |
addr = &t; |
1001 |
} else {
|
1002 |
tcg_gen_xori_tl(t, t, 2);
|
1003 |
} |
1004 |
break;
|
1005 |
default:
|
1006 |
cpu_abort(dc->env, "Invalid reverse size\n");
|
1007 |
break;
|
1008 |
} |
1009 |
} |
1010 |
|
1011 |
/* If we get a fault on a dslot, the jmpstate better be in sync. */
|
1012 |
sync_jmpstate(dc); |
1013 |
|
1014 |
/* Verify alignment if needed. */
|
1015 |
if ((dc->env->pvr.regs[2] & PVR2_UNALIGNED_EXC_MASK) && size > 1) { |
1016 |
TCGv v = tcg_temp_new(); |
1017 |
|
1018 |
/*
|
1019 |
* Microblaze gives MMU faults priority over faults due to
|
1020 |
* unaligned addresses. That's why we speculatively do the load
|
1021 |
* into v. If the load succeeds, we verify alignment of the
|
1022 |
* address and if that succeeds we write into the destination reg.
|
1023 |
*/
|
1024 |
gen_load(dc, v, *addr, size); |
1025 |
|
1026 |
tcg_gen_movi_tl(cpu_SR[SR_PC], dc->pc); |
1027 |
gen_helper_memalign(*addr, tcg_const_tl(dc->rd), |
1028 |
tcg_const_tl(0), tcg_const_tl(size - 1)); |
1029 |
if (dc->rd) {
|
1030 |
if (rev) {
|
1031 |
dec_byteswap(dc, cpu_R[dc->rd], v, size); |
1032 |
} else {
|
1033 |
tcg_gen_mov_tl(cpu_R[dc->rd], v); |
1034 |
} |
1035 |
} |
1036 |
tcg_temp_free(v); |
1037 |
} else {
|
1038 |
if (dc->rd) {
|
1039 |
gen_load(dc, cpu_R[dc->rd], *addr, size); |
1040 |
if (rev) {
|
1041 |
dec_byteswap(dc, cpu_R[dc->rd], cpu_R[dc->rd], size); |
1042 |
} |
1043 |
} else {
|
1044 |
/* We are loading into r0, no need to reverse. */
|
1045 |
gen_load(dc, env_imm, *addr, size); |
1046 |
} |
1047 |
} |
1048 |
|
1049 |
if (addr == &t)
|
1050 |
tcg_temp_free(t); |
1051 |
} |
1052 |
|
1053 |
static void gen_store(DisasContext *dc, TCGv addr, TCGv val, |
1054 |
unsigned int size) |
1055 |
{ |
1056 |
int mem_index = cpu_mmu_index(dc->env);
|
1057 |
|
1058 |
if (size == 1) |
1059 |
tcg_gen_qemu_st8(val, addr, mem_index); |
1060 |
else if (size == 2) { |
1061 |
tcg_gen_qemu_st16(val, addr, mem_index); |
1062 |
} else if (size == 4) { |
1063 |
tcg_gen_qemu_st32(val, addr, mem_index); |
1064 |
} else
|
1065 |
cpu_abort(dc->env, "Incorrect store size %d\n", size);
|
1066 |
} |
1067 |
|
1068 |
static void dec_store(DisasContext *dc) |
1069 |
{ |
1070 |
TCGv t, *addr; |
1071 |
unsigned int size, rev = 0; |
1072 |
|
1073 |
size = 1 << (dc->opcode & 3); |
1074 |
if (!dc->type_b) {
|
1075 |
rev = (dc->ir >> 9) & 1; |
1076 |
} |
1077 |
|
1078 |
if (size > 4 && (dc->tb_flags & MSR_EE_FLAG) |
1079 |
&& (dc->env->pvr.regs[2] & PVR2_ILL_OPCODE_EXC_MASK)) {
|
1080 |
tcg_gen_movi_tl(cpu_SR[SR_ESR], ESR_EC_ILLEGAL_OP); |
1081 |
t_gen_raise_exception(dc, EXCP_HW_EXCP); |
1082 |
return;
|
1083 |
} |
1084 |
|
1085 |
LOG_DIS("s%d%s%s\n", size, dc->type_b ? "i" : "", rev ? "r" : ""); |
1086 |
t_sync_flags(dc); |
1087 |
/* If we get a fault on a dslot, the jmpstate better be in sync. */
|
1088 |
sync_jmpstate(dc); |
1089 |
addr = compute_ldst_addr(dc, &t); |
1090 |
|
1091 |
if (rev && size != 4) { |
1092 |
/* Endian reverse the address. t is addr. */
|
1093 |
switch (size) {
|
1094 |
case 1: |
1095 |
{ |
1096 |
/* 00 -> 11
|
1097 |
01 -> 10
|
1098 |
10 -> 10
|
1099 |
11 -> 00 */
|
1100 |
TCGv low = tcg_temp_new(); |
1101 |
|
1102 |
/* Force addr into the temp. */
|
1103 |
if (addr != &t) {
|
1104 |
t = tcg_temp_new(); |
1105 |
tcg_gen_mov_tl(t, *addr); |
1106 |
addr = &t; |
1107 |
} |
1108 |
|
1109 |
tcg_gen_andi_tl(low, t, 3);
|
1110 |
tcg_gen_sub_tl(low, tcg_const_tl(3), low);
|
1111 |
tcg_gen_andi_tl(t, t, ~3);
|
1112 |
tcg_gen_or_tl(t, t, low); |
1113 |
tcg_gen_mov_tl(env_imm, t); |
1114 |
tcg_temp_free(low); |
1115 |
break;
|
1116 |
} |
1117 |
|
1118 |
case 2: |
1119 |
/* 00 -> 10
|
1120 |
10 -> 00. */
|
1121 |
/* Force addr into the temp. */
|
1122 |
if (addr != &t) {
|
1123 |
t = tcg_temp_new(); |
1124 |
tcg_gen_xori_tl(t, *addr, 2);
|
1125 |
addr = &t; |
1126 |
} else {
|
1127 |
tcg_gen_xori_tl(t, t, 2);
|
1128 |
} |
1129 |
break;
|
1130 |
default:
|
1131 |
cpu_abort(dc->env, "Invalid reverse size\n");
|
1132 |
break;
|
1133 |
} |
1134 |
|
1135 |
if (size != 1) { |
1136 |
TCGv bs_data = tcg_temp_new(); |
1137 |
dec_byteswap(dc, bs_data, cpu_R[dc->rd], size); |
1138 |
gen_store(dc, *addr, bs_data, size); |
1139 |
tcg_temp_free(bs_data); |
1140 |
} else {
|
1141 |
gen_store(dc, *addr, cpu_R[dc->rd], size); |
1142 |
} |
1143 |
} else {
|
1144 |
if (rev) {
|
1145 |
TCGv bs_data = tcg_temp_new(); |
1146 |
dec_byteswap(dc, bs_data, cpu_R[dc->rd], size); |
1147 |
gen_store(dc, *addr, bs_data, size); |
1148 |
tcg_temp_free(bs_data); |
1149 |
} else {
|
1150 |
gen_store(dc, *addr, cpu_R[dc->rd], size); |
1151 |
} |
1152 |
} |
1153 |
|
1154 |
/* Verify alignment if needed. */
|
1155 |
if ((dc->env->pvr.regs[2] & PVR2_UNALIGNED_EXC_MASK) && size > 1) { |
1156 |
tcg_gen_movi_tl(cpu_SR[SR_PC], dc->pc); |
1157 |
/* FIXME: if the alignment is wrong, we should restore the value
|
1158 |
* in memory. One possible way to achieve this is to probe
|
1159 |
* the MMU prior to the memaccess, thay way we could put
|
1160 |
* the alignment checks in between the probe and the mem
|
1161 |
* access.
|
1162 |
*/
|
1163 |
gen_helper_memalign(*addr, tcg_const_tl(dc->rd), |
1164 |
tcg_const_tl(1), tcg_const_tl(size - 1)); |
1165 |
} |
1166 |
|
1167 |
if (addr == &t)
|
1168 |
tcg_temp_free(t); |
1169 |
} |
1170 |
|
1171 |
static inline void eval_cc(DisasContext *dc, unsigned int cc, |
1172 |
TCGv d, TCGv a, TCGv b) |
1173 |
{ |
1174 |
switch (cc) {
|
1175 |
case CC_EQ:
|
1176 |
tcg_gen_setcond_tl(TCG_COND_EQ, d, a, b); |
1177 |
break;
|
1178 |
case CC_NE:
|
1179 |
tcg_gen_setcond_tl(TCG_COND_NE, d, a, b); |
1180 |
break;
|
1181 |
case CC_LT:
|
1182 |
tcg_gen_setcond_tl(TCG_COND_LT, d, a, b); |
1183 |
break;
|
1184 |
case CC_LE:
|
1185 |
tcg_gen_setcond_tl(TCG_COND_LE, d, a, b); |
1186 |
break;
|
1187 |
case CC_GE:
|
1188 |
tcg_gen_setcond_tl(TCG_COND_GE, d, a, b); |
1189 |
break;
|
1190 |
case CC_GT:
|
1191 |
tcg_gen_setcond_tl(TCG_COND_GT, d, a, b); |
1192 |
break;
|
1193 |
default:
|
1194 |
cpu_abort(dc->env, "Unknown condition code %x.\n", cc);
|
1195 |
break;
|
1196 |
} |
1197 |
} |
1198 |
|
1199 |
static void eval_cond_jmp(DisasContext *dc, TCGv pc_true, TCGv pc_false) |
1200 |
{ |
1201 |
int l1;
|
1202 |
|
1203 |
l1 = gen_new_label(); |
1204 |
/* Conditional jmp. */
|
1205 |
tcg_gen_mov_tl(cpu_SR[SR_PC], pc_false); |
1206 |
tcg_gen_brcondi_tl(TCG_COND_EQ, env_btaken, 0, l1);
|
1207 |
tcg_gen_mov_tl(cpu_SR[SR_PC], pc_true); |
1208 |
gen_set_label(l1); |
1209 |
} |
1210 |
|
1211 |
static void dec_bcc(DisasContext *dc) |
1212 |
{ |
1213 |
unsigned int cc; |
1214 |
unsigned int dslot; |
1215 |
|
1216 |
cc = EXTRACT_FIELD(dc->ir, 21, 23); |
1217 |
dslot = dc->ir & (1 << 25); |
1218 |
LOG_DIS("bcc%s r%d %x\n", dslot ? "d" : "", dc->ra, dc->imm); |
1219 |
|
1220 |
dc->delayed_branch = 1;
|
1221 |
if (dslot) {
|
1222 |
dc->delayed_branch = 2;
|
1223 |
dc->tb_flags |= D_FLAG; |
1224 |
tcg_gen_st_tl(tcg_const_tl(dc->type_b && (dc->tb_flags & IMM_FLAG)), |
1225 |
cpu_env, offsetof(CPUState, bimm)); |
1226 |
} |
1227 |
|
1228 |
if (dec_alu_op_b_is_small_imm(dc)) {
|
1229 |
int32_t offset = (int32_t)((int16_t)dc->imm); /* sign-extend. */
|
1230 |
|
1231 |
tcg_gen_movi_tl(env_btarget, dc->pc + offset); |
1232 |
dc->jmp = JMP_DIRECT_CC; |
1233 |
dc->jmp_pc = dc->pc + offset; |
1234 |
} else {
|
1235 |
dc->jmp = JMP_INDIRECT; |
1236 |
tcg_gen_movi_tl(env_btarget, dc->pc); |
1237 |
tcg_gen_add_tl(env_btarget, env_btarget, *(dec_alu_op_b(dc))); |
1238 |
} |
1239 |
eval_cc(dc, cc, env_btaken, cpu_R[dc->ra], tcg_const_tl(0));
|
1240 |
} |
1241 |
|
1242 |
static void dec_br(DisasContext *dc) |
1243 |
{ |
1244 |
unsigned int dslot, link, abs, mbar; |
1245 |
int mem_index = cpu_mmu_index(dc->env);
|
1246 |
|
1247 |
dslot = dc->ir & (1 << 20); |
1248 |
abs = dc->ir & (1 << 19); |
1249 |
link = dc->ir & (1 << 18); |
1250 |
|
1251 |
/* Memory barrier. */
|
1252 |
mbar = (dc->ir >> 16) & 31; |
1253 |
if (mbar == 2 && dc->imm == 4) { |
1254 |
LOG_DIS("mbar %d\n", dc->rd);
|
1255 |
/* Break the TB. */
|
1256 |
dc->cpustate_changed = 1;
|
1257 |
return;
|
1258 |
} |
1259 |
|
1260 |
LOG_DIS("br%s%s%s%s imm=%x\n",
|
1261 |
abs ? "a" : "", link ? "l" : "", |
1262 |
dc->type_b ? "i" : "", dslot ? "d" : "", |
1263 |
dc->imm); |
1264 |
|
1265 |
dc->delayed_branch = 1;
|
1266 |
if (dslot) {
|
1267 |
dc->delayed_branch = 2;
|
1268 |
dc->tb_flags |= D_FLAG; |
1269 |
tcg_gen_st_tl(tcg_const_tl(dc->type_b && (dc->tb_flags & IMM_FLAG)), |
1270 |
cpu_env, offsetof(CPUState, bimm)); |
1271 |
} |
1272 |
if (link && dc->rd)
|
1273 |
tcg_gen_movi_tl(cpu_R[dc->rd], dc->pc); |
1274 |
|
1275 |
dc->jmp = JMP_INDIRECT; |
1276 |
if (abs) {
|
1277 |
tcg_gen_movi_tl(env_btaken, 1);
|
1278 |
tcg_gen_mov_tl(env_btarget, *(dec_alu_op_b(dc))); |
1279 |
if (link && !dslot) {
|
1280 |
if (!(dc->tb_flags & IMM_FLAG) && (dc->imm == 8 || dc->imm == 0x18)) |
1281 |
t_gen_raise_exception(dc, EXCP_BREAK); |
1282 |
if (dc->imm == 0) { |
1283 |
if ((dc->tb_flags & MSR_EE_FLAG) && mem_index == MMU_USER_IDX) {
|
1284 |
tcg_gen_movi_tl(cpu_SR[SR_ESR], ESR_EC_PRIVINSN); |
1285 |
t_gen_raise_exception(dc, EXCP_HW_EXCP); |
1286 |
return;
|
1287 |
} |
1288 |
|
1289 |
t_gen_raise_exception(dc, EXCP_DEBUG); |
1290 |
} |
1291 |
} |
1292 |
} else {
|
1293 |
if (dec_alu_op_b_is_small_imm(dc)) {
|
1294 |
dc->jmp = JMP_DIRECT; |
1295 |
dc->jmp_pc = dc->pc + (int32_t)((int16_t)dc->imm); |
1296 |
} else {
|
1297 |
tcg_gen_movi_tl(env_btaken, 1);
|
1298 |
tcg_gen_movi_tl(env_btarget, dc->pc); |
1299 |
tcg_gen_add_tl(env_btarget, env_btarget, *(dec_alu_op_b(dc))); |
1300 |
} |
1301 |
} |
1302 |
} |
1303 |
|
1304 |
static inline void do_rti(DisasContext *dc) |
1305 |
{ |
1306 |
TCGv t0, t1; |
1307 |
t0 = tcg_temp_new(); |
1308 |
t1 = tcg_temp_new(); |
1309 |
tcg_gen_shri_tl(t0, cpu_SR[SR_MSR], 1);
|
1310 |
tcg_gen_ori_tl(t1, cpu_SR[SR_MSR], MSR_IE); |
1311 |
tcg_gen_andi_tl(t0, t0, (MSR_VM | MSR_UM)); |
1312 |
|
1313 |
tcg_gen_andi_tl(t1, t1, ~(MSR_VM | MSR_UM)); |
1314 |
tcg_gen_or_tl(t1, t1, t0); |
1315 |
msr_write(dc, t1); |
1316 |
tcg_temp_free(t1); |
1317 |
tcg_temp_free(t0); |
1318 |
dc->tb_flags &= ~DRTI_FLAG; |
1319 |
} |
1320 |
|
1321 |
static inline void do_rtb(DisasContext *dc) |
1322 |
{ |
1323 |
TCGv t0, t1; |
1324 |
t0 = tcg_temp_new(); |
1325 |
t1 = tcg_temp_new(); |
1326 |
tcg_gen_andi_tl(t1, cpu_SR[SR_MSR], ~MSR_BIP); |
1327 |
tcg_gen_shri_tl(t0, t1, 1);
|
1328 |
tcg_gen_andi_tl(t0, t0, (MSR_VM | MSR_UM)); |
1329 |
|
1330 |
tcg_gen_andi_tl(t1, t1, ~(MSR_VM | MSR_UM)); |
1331 |
tcg_gen_or_tl(t1, t1, t0); |
1332 |
msr_write(dc, t1); |
1333 |
tcg_temp_free(t1); |
1334 |
tcg_temp_free(t0); |
1335 |
dc->tb_flags &= ~DRTB_FLAG; |
1336 |
} |
1337 |
|
1338 |
static inline void do_rte(DisasContext *dc) |
1339 |
{ |
1340 |
TCGv t0, t1; |
1341 |
t0 = tcg_temp_new(); |
1342 |
t1 = tcg_temp_new(); |
1343 |
|
1344 |
tcg_gen_ori_tl(t1, cpu_SR[SR_MSR], MSR_EE); |
1345 |
tcg_gen_andi_tl(t1, t1, ~MSR_EIP); |
1346 |
tcg_gen_shri_tl(t0, t1, 1);
|
1347 |
tcg_gen_andi_tl(t0, t0, (MSR_VM | MSR_UM)); |
1348 |
|
1349 |
tcg_gen_andi_tl(t1, t1, ~(MSR_VM | MSR_UM)); |
1350 |
tcg_gen_or_tl(t1, t1, t0); |
1351 |
msr_write(dc, t1); |
1352 |
tcg_temp_free(t1); |
1353 |
tcg_temp_free(t0); |
1354 |
dc->tb_flags &= ~DRTE_FLAG; |
1355 |
} |
1356 |
|
1357 |
static void dec_rts(DisasContext *dc) |
1358 |
{ |
1359 |
unsigned int b_bit, i_bit, e_bit; |
1360 |
int mem_index = cpu_mmu_index(dc->env);
|
1361 |
|
1362 |
i_bit = dc->ir & (1 << 21); |
1363 |
b_bit = dc->ir & (1 << 22); |
1364 |
e_bit = dc->ir & (1 << 23); |
1365 |
|
1366 |
dc->delayed_branch = 2;
|
1367 |
dc->tb_flags |= D_FLAG; |
1368 |
tcg_gen_st_tl(tcg_const_tl(dc->type_b && (dc->tb_flags & IMM_FLAG)), |
1369 |
cpu_env, offsetof(CPUState, bimm)); |
1370 |
|
1371 |
if (i_bit) {
|
1372 |
LOG_DIS("rtid ir=%x\n", dc->ir);
|
1373 |
if ((dc->tb_flags & MSR_EE_FLAG)
|
1374 |
&& mem_index == MMU_USER_IDX) { |
1375 |
tcg_gen_movi_tl(cpu_SR[SR_ESR], ESR_EC_PRIVINSN); |
1376 |
t_gen_raise_exception(dc, EXCP_HW_EXCP); |
1377 |
} |
1378 |
dc->tb_flags |= DRTI_FLAG; |
1379 |
} else if (b_bit) { |
1380 |
LOG_DIS("rtbd ir=%x\n", dc->ir);
|
1381 |
if ((dc->tb_flags & MSR_EE_FLAG)
|
1382 |
&& mem_index == MMU_USER_IDX) { |
1383 |
tcg_gen_movi_tl(cpu_SR[SR_ESR], ESR_EC_PRIVINSN); |
1384 |
t_gen_raise_exception(dc, EXCP_HW_EXCP); |
1385 |
} |
1386 |
dc->tb_flags |= DRTB_FLAG; |
1387 |
} else if (e_bit) { |
1388 |
LOG_DIS("rted ir=%x\n", dc->ir);
|
1389 |
if ((dc->tb_flags & MSR_EE_FLAG)
|
1390 |
&& mem_index == MMU_USER_IDX) { |
1391 |
tcg_gen_movi_tl(cpu_SR[SR_ESR], ESR_EC_PRIVINSN); |
1392 |
t_gen_raise_exception(dc, EXCP_HW_EXCP); |
1393 |
} |
1394 |
dc->tb_flags |= DRTE_FLAG; |
1395 |
} else
|
1396 |
LOG_DIS("rts ir=%x\n", dc->ir);
|
1397 |
|
1398 |
dc->jmp = JMP_INDIRECT; |
1399 |
tcg_gen_movi_tl(env_btaken, 1);
|
1400 |
tcg_gen_add_tl(env_btarget, cpu_R[dc->ra], *(dec_alu_op_b(dc))); |
1401 |
} |
1402 |
|
1403 |
static int dec_check_fpuv2(DisasContext *dc) |
1404 |
{ |
1405 |
int r;
|
1406 |
|
1407 |
r = dc->env->pvr.regs[2] & PVR2_USE_FPU2_MASK;
|
1408 |
|
1409 |
if (!r && (dc->tb_flags & MSR_EE_FLAG)) {
|
1410 |
tcg_gen_movi_tl(cpu_SR[SR_ESR], ESR_EC_FPU); |
1411 |
t_gen_raise_exception(dc, EXCP_HW_EXCP); |
1412 |
} |
1413 |
return r;
|
1414 |
} |
1415 |
|
1416 |
static void dec_fpu(DisasContext *dc) |
1417 |
{ |
1418 |
unsigned int fpu_insn; |
1419 |
|
1420 |
if ((dc->tb_flags & MSR_EE_FLAG)
|
1421 |
&& (dc->env->pvr.regs[2] & PVR2_ILL_OPCODE_EXC_MASK)
|
1422 |
&& !((dc->env->pvr.regs[2] & PVR2_USE_FPU_MASK))) {
|
1423 |
tcg_gen_movi_tl(cpu_SR[SR_ESR], ESR_EC_ILLEGAL_OP); |
1424 |
t_gen_raise_exception(dc, EXCP_HW_EXCP); |
1425 |
return;
|
1426 |
} |
1427 |
|
1428 |
fpu_insn = (dc->ir >> 7) & 7; |
1429 |
|
1430 |
switch (fpu_insn) {
|
1431 |
case 0: |
1432 |
gen_helper_fadd(cpu_R[dc->rd], cpu_R[dc->ra], cpu_R[dc->rb]); |
1433 |
break;
|
1434 |
|
1435 |
case 1: |
1436 |
gen_helper_frsub(cpu_R[dc->rd], cpu_R[dc->ra], cpu_R[dc->rb]); |
1437 |
break;
|
1438 |
|
1439 |
case 2: |
1440 |
gen_helper_fmul(cpu_R[dc->rd], cpu_R[dc->ra], cpu_R[dc->rb]); |
1441 |
break;
|
1442 |
|
1443 |
case 3: |
1444 |
gen_helper_fdiv(cpu_R[dc->rd], cpu_R[dc->ra], cpu_R[dc->rb]); |
1445 |
break;
|
1446 |
|
1447 |
case 4: |
1448 |
switch ((dc->ir >> 4) & 7) { |
1449 |
case 0: |
1450 |
gen_helper_fcmp_un(cpu_R[dc->rd], |
1451 |
cpu_R[dc->ra], cpu_R[dc->rb]); |
1452 |
break;
|
1453 |
case 1: |
1454 |
gen_helper_fcmp_lt(cpu_R[dc->rd], |
1455 |
cpu_R[dc->ra], cpu_R[dc->rb]); |
1456 |
break;
|
1457 |
case 2: |
1458 |
gen_helper_fcmp_eq(cpu_R[dc->rd], |
1459 |
cpu_R[dc->ra], cpu_R[dc->rb]); |
1460 |
break;
|
1461 |
case 3: |
1462 |
gen_helper_fcmp_le(cpu_R[dc->rd], |
1463 |
cpu_R[dc->ra], cpu_R[dc->rb]); |
1464 |
break;
|
1465 |
case 4: |
1466 |
gen_helper_fcmp_gt(cpu_R[dc->rd], |
1467 |
cpu_R[dc->ra], cpu_R[dc->rb]); |
1468 |
break;
|
1469 |
case 5: |
1470 |
gen_helper_fcmp_ne(cpu_R[dc->rd], |
1471 |
cpu_R[dc->ra], cpu_R[dc->rb]); |
1472 |
break;
|
1473 |
case 6: |
1474 |
gen_helper_fcmp_ge(cpu_R[dc->rd], |
1475 |
cpu_R[dc->ra], cpu_R[dc->rb]); |
1476 |
break;
|
1477 |
default:
|
1478 |
qemu_log ("unimplemented fcmp fpu_insn=%x pc=%x opc=%x\n",
|
1479 |
fpu_insn, dc->pc, dc->opcode); |
1480 |
dc->abort_at_next_insn = 1;
|
1481 |
break;
|
1482 |
} |
1483 |
break;
|
1484 |
|
1485 |
case 5: |
1486 |
if (!dec_check_fpuv2(dc)) {
|
1487 |
return;
|
1488 |
} |
1489 |
gen_helper_flt(cpu_R[dc->rd], cpu_R[dc->ra]); |
1490 |
break;
|
1491 |
|
1492 |
case 6: |
1493 |
if (!dec_check_fpuv2(dc)) {
|
1494 |
return;
|
1495 |
} |
1496 |
gen_helper_fint(cpu_R[dc->rd], cpu_R[dc->ra]); |
1497 |
break;
|
1498 |
|
1499 |
case 7: |
1500 |
if (!dec_check_fpuv2(dc)) {
|
1501 |
return;
|
1502 |
} |
1503 |
gen_helper_fsqrt(cpu_R[dc->rd], cpu_R[dc->ra]); |
1504 |
break;
|
1505 |
|
1506 |
default:
|
1507 |
qemu_log ("unimplemented FPU insn fpu_insn=%x pc=%x opc=%x\n",
|
1508 |
fpu_insn, dc->pc, dc->opcode); |
1509 |
dc->abort_at_next_insn = 1;
|
1510 |
break;
|
1511 |
} |
1512 |
} |
1513 |
|
1514 |
static void dec_null(DisasContext *dc) |
1515 |
{ |
1516 |
if ((dc->tb_flags & MSR_EE_FLAG)
|
1517 |
&& (dc->env->pvr.regs[2] & PVR2_ILL_OPCODE_EXC_MASK)) {
|
1518 |
tcg_gen_movi_tl(cpu_SR[SR_ESR], ESR_EC_ILLEGAL_OP); |
1519 |
t_gen_raise_exception(dc, EXCP_HW_EXCP); |
1520 |
return;
|
1521 |
} |
1522 |
qemu_log ("unknown insn pc=%x opc=%x\n", dc->pc, dc->opcode);
|
1523 |
dc->abort_at_next_insn = 1;
|
1524 |
} |
1525 |
|
1526 |
/* Insns connected to FSL or AXI stream attached devices. */
|
1527 |
static void dec_stream(DisasContext *dc) |
1528 |
{ |
1529 |
int mem_index = cpu_mmu_index(dc->env);
|
1530 |
TCGv_i32 t_id, t_ctrl; |
1531 |
int ctrl;
|
1532 |
|
1533 |
LOG_DIS("%s%s imm=%x\n", dc->rd ? "get" : "put", |
1534 |
dc->type_b ? "" : "d", dc->imm); |
1535 |
|
1536 |
if ((dc->tb_flags & MSR_EE_FLAG) && (mem_index == MMU_USER_IDX)) {
|
1537 |
tcg_gen_movi_tl(cpu_SR[SR_ESR], ESR_EC_PRIVINSN); |
1538 |
t_gen_raise_exception(dc, EXCP_HW_EXCP); |
1539 |
return;
|
1540 |
} |
1541 |
|
1542 |
t_id = tcg_temp_new(); |
1543 |
if (dc->type_b) {
|
1544 |
tcg_gen_movi_tl(t_id, dc->imm & 0xf);
|
1545 |
ctrl = dc->imm >> 10;
|
1546 |
} else {
|
1547 |
tcg_gen_andi_tl(t_id, cpu_R[dc->rb], 0xf);
|
1548 |
ctrl = dc->imm >> 5;
|
1549 |
} |
1550 |
|
1551 |
t_ctrl = tcg_const_tl(ctrl); |
1552 |
|
1553 |
if (dc->rd == 0) { |
1554 |
gen_helper_put(t_id, t_ctrl, cpu_R[dc->ra]); |
1555 |
} else {
|
1556 |
gen_helper_get(cpu_R[dc->rd], t_id, t_ctrl); |
1557 |
} |
1558 |
tcg_temp_free(t_id); |
1559 |
tcg_temp_free(t_ctrl); |
1560 |
} |
1561 |
|
1562 |
static struct decoder_info { |
1563 |
struct {
|
1564 |
uint32_t bits; |
1565 |
uint32_t mask; |
1566 |
}; |
1567 |
void (*dec)(DisasContext *dc);
|
1568 |
} decinfo[] = { |
1569 |
{DEC_ADD, dec_add}, |
1570 |
{DEC_SUB, dec_sub}, |
1571 |
{DEC_AND, dec_and}, |
1572 |
{DEC_XOR, dec_xor}, |
1573 |
{DEC_OR, dec_or}, |
1574 |
{DEC_BIT, dec_bit}, |
1575 |
{DEC_BARREL, dec_barrel}, |
1576 |
{DEC_LD, dec_load}, |
1577 |
{DEC_ST, dec_store}, |
1578 |
{DEC_IMM, dec_imm}, |
1579 |
{DEC_BR, dec_br}, |
1580 |
{DEC_BCC, dec_bcc}, |
1581 |
{DEC_RTS, dec_rts}, |
1582 |
{DEC_FPU, dec_fpu}, |
1583 |
{DEC_MUL, dec_mul}, |
1584 |
{DEC_DIV, dec_div}, |
1585 |
{DEC_MSR, dec_msr}, |
1586 |
{DEC_STREAM, dec_stream}, |
1587 |
{{0, 0}, dec_null} |
1588 |
}; |
1589 |
|
1590 |
static inline void decode(DisasContext *dc) |
1591 |
{ |
1592 |
uint32_t ir; |
1593 |
int i;
|
1594 |
|
1595 |
if (unlikely(qemu_loglevel_mask(CPU_LOG_TB_OP)))
|
1596 |
tcg_gen_debug_insn_start(dc->pc); |
1597 |
|
1598 |
dc->ir = ir = ldl_code(dc->pc); |
1599 |
LOG_DIS("%8.8x\t", dc->ir);
|
1600 |
|
1601 |
if (dc->ir)
|
1602 |
dc->nr_nops = 0;
|
1603 |
else {
|
1604 |
if ((dc->tb_flags & MSR_EE_FLAG)
|
1605 |
&& (dc->env->pvr.regs[2] & PVR2_ILL_OPCODE_EXC_MASK)
|
1606 |
&& (dc->env->pvr.regs[2] & PVR2_OPCODE_0x0_ILL_MASK)) {
|
1607 |
tcg_gen_movi_tl(cpu_SR[SR_ESR], ESR_EC_ILLEGAL_OP); |
1608 |
t_gen_raise_exception(dc, EXCP_HW_EXCP); |
1609 |
return;
|
1610 |
} |
1611 |
|
1612 |
LOG_DIS("nr_nops=%d\t", dc->nr_nops);
|
1613 |
dc->nr_nops++; |
1614 |
if (dc->nr_nops > 4) |
1615 |
cpu_abort(dc->env, "fetching nop sequence\n");
|
1616 |
} |
1617 |
/* bit 2 seems to indicate insn type. */
|
1618 |
dc->type_b = ir & (1 << 29); |
1619 |
|
1620 |
dc->opcode = EXTRACT_FIELD(ir, 26, 31); |
1621 |
dc->rd = EXTRACT_FIELD(ir, 21, 25); |
1622 |
dc->ra = EXTRACT_FIELD(ir, 16, 20); |
1623 |
dc->rb = EXTRACT_FIELD(ir, 11, 15); |
1624 |
dc->imm = EXTRACT_FIELD(ir, 0, 15); |
1625 |
|
1626 |
/* Large switch for all insns. */
|
1627 |
for (i = 0; i < ARRAY_SIZE(decinfo); i++) { |
1628 |
if ((dc->opcode & decinfo[i].mask) == decinfo[i].bits) {
|
1629 |
decinfo[i].dec(dc); |
1630 |
break;
|
1631 |
} |
1632 |
} |
1633 |
} |
1634 |
|
1635 |
static void check_breakpoint(CPUState *env, DisasContext *dc) |
1636 |
{ |
1637 |
CPUBreakpoint *bp; |
1638 |
|
1639 |
if (unlikely(!QTAILQ_EMPTY(&env->breakpoints))) {
|
1640 |
QTAILQ_FOREACH(bp, &env->breakpoints, entry) { |
1641 |
if (bp->pc == dc->pc) {
|
1642 |
t_gen_raise_exception(dc, EXCP_DEBUG); |
1643 |
dc->is_jmp = DISAS_UPDATE; |
1644 |
} |
1645 |
} |
1646 |
} |
1647 |
} |
1648 |
|
1649 |
/* generate intermediate code for basic block 'tb'. */
|
1650 |
static void |
1651 |
gen_intermediate_code_internal(CPUState *env, TranslationBlock *tb, |
1652 |
int search_pc)
|
1653 |
{ |
1654 |
uint16_t *gen_opc_end; |
1655 |
uint32_t pc_start; |
1656 |
int j, lj;
|
1657 |
struct DisasContext ctx;
|
1658 |
struct DisasContext *dc = &ctx;
|
1659 |
uint32_t next_page_start, org_flags; |
1660 |
target_ulong npc; |
1661 |
int num_insns;
|
1662 |
int max_insns;
|
1663 |
|
1664 |
qemu_log_try_set_file(stderr); |
1665 |
|
1666 |
pc_start = tb->pc; |
1667 |
dc->env = env; |
1668 |
dc->tb = tb; |
1669 |
org_flags = dc->synced_flags = dc->tb_flags = tb->flags; |
1670 |
|
1671 |
gen_opc_end = gen_opc_buf + OPC_MAX_SIZE; |
1672 |
|
1673 |
dc->is_jmp = DISAS_NEXT; |
1674 |
dc->jmp = 0;
|
1675 |
dc->delayed_branch = !!(dc->tb_flags & D_FLAG); |
1676 |
if (dc->delayed_branch) {
|
1677 |
dc->jmp = JMP_INDIRECT; |
1678 |
} |
1679 |
dc->pc = pc_start; |
1680 |
dc->singlestep_enabled = env->singlestep_enabled; |
1681 |
dc->cpustate_changed = 0;
|
1682 |
dc->abort_at_next_insn = 0;
|
1683 |
dc->nr_nops = 0;
|
1684 |
|
1685 |
if (pc_start & 3) |
1686 |
cpu_abort(env, "Microblaze: unaligned PC=%x\n", pc_start);
|
1687 |
|
1688 |
if (qemu_loglevel_mask(CPU_LOG_TB_IN_ASM)) {
|
1689 |
#if !SIM_COMPAT
|
1690 |
qemu_log("--------------\n");
|
1691 |
log_cpu_state(env, 0);
|
1692 |
#endif
|
1693 |
} |
1694 |
|
1695 |
next_page_start = (pc_start & TARGET_PAGE_MASK) + TARGET_PAGE_SIZE; |
1696 |
lj = -1;
|
1697 |
num_insns = 0;
|
1698 |
max_insns = tb->cflags & CF_COUNT_MASK; |
1699 |
if (max_insns == 0) |
1700 |
max_insns = CF_COUNT_MASK; |
1701 |
|
1702 |
gen_icount_start(); |
1703 |
do
|
1704 |
{ |
1705 |
#if SIM_COMPAT
|
1706 |
if (qemu_loglevel_mask(CPU_LOG_TB_IN_ASM)) {
|
1707 |
tcg_gen_movi_tl(cpu_SR[SR_PC], dc->pc); |
1708 |
gen_helper_debug(); |
1709 |
} |
1710 |
#endif
|
1711 |
check_breakpoint(env, dc); |
1712 |
|
1713 |
if (search_pc) {
|
1714 |
j = gen_opc_ptr - gen_opc_buf; |
1715 |
if (lj < j) {
|
1716 |
lj++; |
1717 |
while (lj < j)
|
1718 |
gen_opc_instr_start[lj++] = 0;
|
1719 |
} |
1720 |
gen_opc_pc[lj] = dc->pc; |
1721 |
gen_opc_instr_start[lj] = 1;
|
1722 |
gen_opc_icount[lj] = num_insns; |
1723 |
} |
1724 |
|
1725 |
/* Pretty disas. */
|
1726 |
LOG_DIS("%8.8x:\t", dc->pc);
|
1727 |
|
1728 |
if (num_insns + 1 == max_insns && (tb->cflags & CF_LAST_IO)) |
1729 |
gen_io_start(); |
1730 |
|
1731 |
dc->clear_imm = 1;
|
1732 |
decode(dc); |
1733 |
if (dc->clear_imm)
|
1734 |
dc->tb_flags &= ~IMM_FLAG; |
1735 |
dc->pc += 4;
|
1736 |
num_insns++; |
1737 |
|
1738 |
if (dc->delayed_branch) {
|
1739 |
dc->delayed_branch--; |
1740 |
if (!dc->delayed_branch) {
|
1741 |
if (dc->tb_flags & DRTI_FLAG)
|
1742 |
do_rti(dc); |
1743 |
if (dc->tb_flags & DRTB_FLAG)
|
1744 |
do_rtb(dc); |
1745 |
if (dc->tb_flags & DRTE_FLAG)
|
1746 |
do_rte(dc); |
1747 |
/* Clear the delay slot flag. */
|
1748 |
dc->tb_flags &= ~D_FLAG; |
1749 |
/* If it is a direct jump, try direct chaining. */
|
1750 |
if (dc->jmp == JMP_INDIRECT) {
|
1751 |
eval_cond_jmp(dc, env_btarget, tcg_const_tl(dc->pc)); |
1752 |
dc->is_jmp = DISAS_JUMP; |
1753 |
} else if (dc->jmp == JMP_DIRECT) { |
1754 |
t_sync_flags(dc); |
1755 |
gen_goto_tb(dc, 0, dc->jmp_pc);
|
1756 |
dc->is_jmp = DISAS_TB_JUMP; |
1757 |
} else if (dc->jmp == JMP_DIRECT_CC) { |
1758 |
int l1;
|
1759 |
|
1760 |
t_sync_flags(dc); |
1761 |
l1 = gen_new_label(); |
1762 |
/* Conditional jmp. */
|
1763 |
tcg_gen_brcondi_tl(TCG_COND_NE, env_btaken, 0, l1);
|
1764 |
gen_goto_tb(dc, 1, dc->pc);
|
1765 |
gen_set_label(l1); |
1766 |
gen_goto_tb(dc, 0, dc->jmp_pc);
|
1767 |
|
1768 |
dc->is_jmp = DISAS_TB_JUMP; |
1769 |
} |
1770 |
break;
|
1771 |
} |
1772 |
} |
1773 |
if (env->singlestep_enabled)
|
1774 |
break;
|
1775 |
} while (!dc->is_jmp && !dc->cpustate_changed
|
1776 |
&& gen_opc_ptr < gen_opc_end |
1777 |
&& !singlestep |
1778 |
&& (dc->pc < next_page_start) |
1779 |
&& num_insns < max_insns); |
1780 |
|
1781 |
npc = dc->pc; |
1782 |
if (dc->jmp == JMP_DIRECT || dc->jmp == JMP_DIRECT_CC) {
|
1783 |
if (dc->tb_flags & D_FLAG) {
|
1784 |
dc->is_jmp = DISAS_UPDATE; |
1785 |
tcg_gen_movi_tl(cpu_SR[SR_PC], npc); |
1786 |
sync_jmpstate(dc); |
1787 |
} else
|
1788 |
npc = dc->jmp_pc; |
1789 |
} |
1790 |
|
1791 |
if (tb->cflags & CF_LAST_IO)
|
1792 |
gen_io_end(); |
1793 |
/* Force an update if the per-tb cpu state has changed. */
|
1794 |
if (dc->is_jmp == DISAS_NEXT
|
1795 |
&& (dc->cpustate_changed || org_flags != dc->tb_flags)) { |
1796 |
dc->is_jmp = DISAS_UPDATE; |
1797 |
tcg_gen_movi_tl(cpu_SR[SR_PC], npc); |
1798 |
} |
1799 |
t_sync_flags(dc); |
1800 |
|
1801 |
if (unlikely(env->singlestep_enabled)) {
|
1802 |
TCGv_i32 tmp = tcg_const_i32(EXCP_DEBUG); |
1803 |
|
1804 |
if (dc->is_jmp != DISAS_JUMP) {
|
1805 |
tcg_gen_movi_tl(cpu_SR[SR_PC], npc); |
1806 |
} |
1807 |
gen_helper_raise_exception(tmp); |
1808 |
tcg_temp_free_i32(tmp); |
1809 |
} else {
|
1810 |
switch(dc->is_jmp) {
|
1811 |
case DISAS_NEXT:
|
1812 |
gen_goto_tb(dc, 1, npc);
|
1813 |
break;
|
1814 |
default:
|
1815 |
case DISAS_JUMP:
|
1816 |
case DISAS_UPDATE:
|
1817 |
/* indicate that the hash table must be used
|
1818 |
to find the next TB */
|
1819 |
tcg_gen_exit_tb(0);
|
1820 |
break;
|
1821 |
case DISAS_TB_JUMP:
|
1822 |
/* nothing more to generate */
|
1823 |
break;
|
1824 |
} |
1825 |
} |
1826 |
gen_icount_end(tb, num_insns); |
1827 |
*gen_opc_ptr = INDEX_op_end; |
1828 |
if (search_pc) {
|
1829 |
j = gen_opc_ptr - gen_opc_buf; |
1830 |
lj++; |
1831 |
while (lj <= j)
|
1832 |
gen_opc_instr_start[lj++] = 0;
|
1833 |
} else {
|
1834 |
tb->size = dc->pc - pc_start; |
1835 |
tb->icount = num_insns; |
1836 |
} |
1837 |
|
1838 |
#ifdef DEBUG_DISAS
|
1839 |
#if !SIM_COMPAT
|
1840 |
if (qemu_loglevel_mask(CPU_LOG_TB_IN_ASM)) {
|
1841 |
qemu_log("\n");
|
1842 |
#if DISAS_GNU
|
1843 |
log_target_disas(pc_start, dc->pc - pc_start, 0);
|
1844 |
#endif
|
1845 |
qemu_log("\nisize=%d osize=%td\n",
|
1846 |
dc->pc - pc_start, gen_opc_ptr - gen_opc_buf); |
1847 |
} |
1848 |
#endif
|
1849 |
#endif
|
1850 |
assert(!dc->abort_at_next_insn); |
1851 |
} |
1852 |
|
1853 |
void gen_intermediate_code (CPUState *env, struct TranslationBlock *tb) |
1854 |
{ |
1855 |
gen_intermediate_code_internal(env, tb, 0);
|
1856 |
} |
1857 |
|
1858 |
void gen_intermediate_code_pc (CPUState *env, struct TranslationBlock *tb) |
1859 |
{ |
1860 |
gen_intermediate_code_internal(env, tb, 1);
|
1861 |
} |
1862 |
|
1863 |
void cpu_dump_state (CPUState *env, FILE *f, fprintf_function cpu_fprintf,
|
1864 |
int flags)
|
1865 |
{ |
1866 |
int i;
|
1867 |
|
1868 |
if (!env || !f)
|
1869 |
return;
|
1870 |
|
1871 |
cpu_fprintf(f, "IN: PC=%x %s\n",
|
1872 |
env->sregs[SR_PC], lookup_symbol(env->sregs[SR_PC])); |
1873 |
cpu_fprintf(f, "rmsr=%x resr=%x rear=%x debug=%x imm=%x iflags=%x fsr=%x\n",
|
1874 |
env->sregs[SR_MSR], env->sregs[SR_ESR], env->sregs[SR_EAR], |
1875 |
env->debug, env->imm, env->iflags, env->sregs[SR_FSR]); |
1876 |
cpu_fprintf(f, "btaken=%d btarget=%x mode=%s(saved=%s) eip=%d ie=%d\n",
|
1877 |
env->btaken, env->btarget, |
1878 |
(env->sregs[SR_MSR] & MSR_UM) ? "user" : "kernel", |
1879 |
(env->sregs[SR_MSR] & MSR_UMS) ? "user" : "kernel", |
1880 |
(env->sregs[SR_MSR] & MSR_EIP), |
1881 |
(env->sregs[SR_MSR] & MSR_IE)); |
1882 |
|
1883 |
for (i = 0; i < 32; i++) { |
1884 |
cpu_fprintf(f, "r%2.2d=%8.8x ", i, env->regs[i]);
|
1885 |
if ((i + 1) % 4 == 0) |
1886 |
cpu_fprintf(f, "\n");
|
1887 |
} |
1888 |
cpu_fprintf(f, "\n\n");
|
1889 |
} |
1890 |
|
1891 |
CPUState *cpu_mb_init (const char *cpu_model) |
1892 |
{ |
1893 |
CPUState *env; |
1894 |
static int tcg_initialized = 0; |
1895 |
int i;
|
1896 |
|
1897 |
env = g_malloc0(sizeof(CPUState));
|
1898 |
|
1899 |
cpu_exec_init(env); |
1900 |
cpu_reset(env); |
1901 |
qemu_init_vcpu(env); |
1902 |
set_float_rounding_mode(float_round_nearest_even, &env->fp_status); |
1903 |
|
1904 |
if (tcg_initialized)
|
1905 |
return env;
|
1906 |
|
1907 |
tcg_initialized = 1;
|
1908 |
|
1909 |
cpu_env = tcg_global_reg_new_ptr(TCG_AREG0, "env");
|
1910 |
|
1911 |
env_debug = tcg_global_mem_new(TCG_AREG0, |
1912 |
offsetof(CPUState, debug), |
1913 |
"debug0");
|
1914 |
env_iflags = tcg_global_mem_new(TCG_AREG0, |
1915 |
offsetof(CPUState, iflags), |
1916 |
"iflags");
|
1917 |
env_imm = tcg_global_mem_new(TCG_AREG0, |
1918 |
offsetof(CPUState, imm), |
1919 |
"imm");
|
1920 |
env_btarget = tcg_global_mem_new(TCG_AREG0, |
1921 |
offsetof(CPUState, btarget), |
1922 |
"btarget");
|
1923 |
env_btaken = tcg_global_mem_new(TCG_AREG0, |
1924 |
offsetof(CPUState, btaken), |
1925 |
"btaken");
|
1926 |
for (i = 0; i < ARRAY_SIZE(cpu_R); i++) { |
1927 |
cpu_R[i] = tcg_global_mem_new(TCG_AREG0, |
1928 |
offsetof(CPUState, regs[i]), |
1929 |
regnames[i]); |
1930 |
} |
1931 |
for (i = 0; i < ARRAY_SIZE(cpu_SR); i++) { |
1932 |
cpu_SR[i] = tcg_global_mem_new(TCG_AREG0, |
1933 |
offsetof(CPUState, sregs[i]), |
1934 |
special_regnames[i]); |
1935 |
} |
1936 |
#define GEN_HELPER 2 |
1937 |
#include "helper.h" |
1938 |
|
1939 |
return env;
|
1940 |
} |
1941 |
|
1942 |
void cpu_reset (CPUState *env)
|
1943 |
{ |
1944 |
if (qemu_loglevel_mask(CPU_LOG_RESET)) {
|
1945 |
qemu_log("CPU Reset (CPU %d)\n", env->cpu_index);
|
1946 |
log_cpu_state(env, 0);
|
1947 |
} |
1948 |
|
1949 |
memset(env, 0, offsetof(CPUMBState, breakpoints));
|
1950 |
tlb_flush(env, 1);
|
1951 |
|
1952 |
/* Disable stack protector. */
|
1953 |
env->shr = ~0;
|
1954 |
|
1955 |
env->pvr.regs[0] = PVR0_PVR_FULL_MASK \
|
1956 |
| PVR0_USE_BARREL_MASK \ |
1957 |
| PVR0_USE_DIV_MASK \ |
1958 |
| PVR0_USE_HW_MUL_MASK \ |
1959 |
| PVR0_USE_EXC_MASK \ |
1960 |
| PVR0_USE_ICACHE_MASK \ |
1961 |
| PVR0_USE_DCACHE_MASK \ |
1962 |
| PVR0_USE_MMU \ |
1963 |
| (0xb << 8); |
1964 |
env->pvr.regs[2] = PVR2_D_OPB_MASK \
|
1965 |
| PVR2_D_LMB_MASK \ |
1966 |
| PVR2_I_OPB_MASK \ |
1967 |
| PVR2_I_LMB_MASK \ |
1968 |
| PVR2_USE_MSR_INSTR \ |
1969 |
| PVR2_USE_PCMP_INSTR \ |
1970 |
| PVR2_USE_BARREL_MASK \ |
1971 |
| PVR2_USE_DIV_MASK \ |
1972 |
| PVR2_USE_HW_MUL_MASK \ |
1973 |
| PVR2_USE_MUL64_MASK \ |
1974 |
| PVR2_USE_FPU_MASK \ |
1975 |
| PVR2_USE_FPU2_MASK \ |
1976 |
| PVR2_FPU_EXC_MASK \ |
1977 |
| 0;
|
1978 |
env->pvr.regs[10] = 0x0c000000; /* Default to spartan 3a dsp family. */ |
1979 |
env->pvr.regs[11] = PVR11_USE_MMU | (16 << 17); |
1980 |
|
1981 |
#if defined(CONFIG_USER_ONLY)
|
1982 |
/* start in user mode with interrupts enabled. */
|
1983 |
env->sregs[SR_MSR] = MSR_EE | MSR_IE | MSR_VM | MSR_UM; |
1984 |
env->pvr.regs[10] = 0x0c000000; /* Spartan 3a dsp. */ |
1985 |
#else
|
1986 |
env->sregs[SR_MSR] = 0;
|
1987 |
mmu_init(&env->mmu); |
1988 |
env->mmu.c_mmu = 3;
|
1989 |
env->mmu.c_mmu_tlb_access = 3;
|
1990 |
env->mmu.c_mmu_zones = 16;
|
1991 |
#endif
|
1992 |
} |
1993 |
|
1994 |
void restore_state_to_opc(CPUState *env, TranslationBlock *tb, int pc_pos) |
1995 |
{ |
1996 |
env->sregs[SR_PC] = gen_opc_pc[pc_pos]; |
1997 |
} |