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[Qemu-devel] Re: [PATCH 02/17] lm32: translation routines
|
From: |
Edgar E. Iglesias |
|
Subject: |
[Qemu-devel] Re: [PATCH 02/17] lm32: translation routines |
|
Date: |
Mon, 7 Feb 2011 19:41:25 +0100 |
|
User-agent: |
Mutt/1.5.20 (2009-06-14) |
On Mon, Jan 31, 2011 at 01:30:31AM +0100, Michael Walle wrote:
> This patch adds the main translation routine. All opcodes of the
> LatticeMico32 processor are supported and translated to TCG ops.
>
> Signed-off-by: Michael Walle <address@hidden>
Hi Michael,
Your port looks very nice. I've only got a couple of very small comments.
> ---
> target-lm32/helper.c | 259 +++++++++
> target-lm32/lm32-decode.h | 78 +++
> target-lm32/translate.c | 1331
> +++++++++++++++++++++++++++++++++++++++++++++
> 3 files changed, 1668 insertions(+), 0 deletions(-)
> create mode 100644 target-lm32/helper.c
> create mode 100644 target-lm32/lm32-decode.h
> create mode 100644 target-lm32/translate.c
>
> diff --git a/target-lm32/helper.c b/target-lm32/helper.c
> new file mode 100644
> index 0000000..0b508c6
> --- /dev/null
> +++ b/target-lm32/helper.c
> @@ -0,0 +1,259 @@
> +/*
> + * LatticeMico32 helper routines.
> + *
> + * Copyright (c) 2010 Michael Walle <address@hidden>
> + *
> + * This library is free software; you can redistribute it and/or
> + * modify it under the terms of the GNU Lesser General Public
> + * License as published by the Free Software Foundation; either
> + * version 2 of the License, or (at your option) any later version.
> + *
> + * This library is distributed in the hope that it will be useful,
> + * but WITHOUT ANY WARRANTY; without even the implied warranty of
> + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
> + * Lesser General Public License for more details.
> + *
> + * You should have received a copy of the GNU Lesser General Public
> + * License along with this library; if not, see
> <http://www.gnu.org/licenses/>.
> + */
> +
> +#include <stdio.h>
> +#include <string.h>
> +#include <assert.h>
> +
> +#include "config.h"
> +#include "cpu.h"
> +#include "exec-all.h"
> +#include "host-utils.h"
> +
> +int cpu_lm32_handle_mmu_fault(CPUState *env, target_ulong address, int rw,
> + int mmu_idx, int is_softmmu)
> +{
> + int prot;
> +
> + address &= TARGET_PAGE_MASK;
> + prot = PAGE_BITS;
> + if (env->flags & LM32_FLAG_IGNORE_MSB) {
> + tlb_set_page(env, address, address & 0x7fffffff, prot, mmu_idx,
> + TARGET_PAGE_SIZE);
> + } else {
> + tlb_set_page(env, address, address, prot, mmu_idx, TARGET_PAGE_SIZE);
> + }
> +
> + return 0;
> +}
> +
> +target_phys_addr_t cpu_get_phys_page_debug(CPUState *env, target_ulong addr)
> +{
> + return addr & TARGET_PAGE_MASK;
> +}
> +
> +void do_interrupt(CPUState *env)
> +{
> + qemu_log_mask(CPU_LOG_INT,
> + "exception at pc=%x type=%x\n", env->pc, env->exception_index);
> +
> + switch (env->exception_index) {
> + case EXCP_INSN_BUS_ERROR:
> + case EXCP_DATA_BUS_ERROR:
> + case EXCP_DIVIDE_BY_ZERO:
> + case EXCP_IRQ:
> + case EXCP_SYSTEMCALL:
> + /* non-debug exceptions */
> + env->regs[R_EA] = env->pc;
> + env->ie |= (env->ie & IE_IE) ? IE_EIE : 0;
> + env->ie &= ~IE_IE;
> + if (env->dc & DC_RE) {
> + env->pc = env->deba + (env->exception_index * 32);
> + } else {
> + env->pc = env->eba + (env->exception_index * 32);
> + }
> + log_cpu_state_mask(CPU_LOG_INT, env, 0);
> + break;
> + case EXCP_BREAKPOINT:
> + case EXCP_WATCHPOINT:
> + /* debug exceptions */
> + env->regs[R_BA] = env->pc;
> + env->ie |= (env->ie & IE_IE) ? IE_BIE : 0;
> + env->ie &= ~IE_IE;
> + if (env->dc & DC_RE) {
> + env->pc = env->deba + (env->exception_index * 32);
> + } else {
> + env->pc = env->eba + (env->exception_index * 32);
> + }
> + log_cpu_state_mask(CPU_LOG_INT, env, 0);
> + break;
> + default:
> + cpu_abort(env, "unhandled exception type=%d\n",
> + env->exception_index);
> + break;
> + }
> +}
> +
> +typedef struct {
> + const char *name;
> + uint32_t revision;
> + uint8_t num_interrupts;
> + uint8_t num_breakpoints;
> + uint8_t num_watchpoints;
> + uint32_t features;
> +} lm32_def_t;
> +
> +static lm32_def_t lm32_defs[] = {
> + {
> + .name = "lm32-basic",
> + .revision = 3,
> + .num_interrupts = 32,
> + .num_breakpoints = 4,
> + .num_watchpoints = 4,
> + .features = (LM32_FEATURE_SHIFT
> + | LM32_FEATURE_SIGN_EXTEND
> + | LM32_FEATURE_CYCLE_COUNT),
> + },
> + {
> + .name = "lm32-standard",
> + .revision = 3,
> + .num_interrupts = 32,
> + .num_breakpoints = 4,
> + .num_watchpoints = 4,
> + .features = (LM32_FEATURE_MULTIPLY
> + | LM32_FEATURE_DIVIDE
> + | LM32_FEATURE_SHIFT
> + | LM32_FEATURE_SIGN_EXTEND
> + | LM32_FEATURE_I_CACHE
> + | LM32_FEATURE_CYCLE_COUNT),
> + },
> + {
> + .name = "lm32-full",
> + .revision = 3,
> + .num_interrupts = 32,
> + .num_breakpoints = 4,
> + .num_watchpoints = 4,
> + .features = (LM32_FEATURE_MULTIPLY
> + | LM32_FEATURE_DIVIDE
> + | LM32_FEATURE_SHIFT
> + | LM32_FEATURE_SIGN_EXTEND
> + | LM32_FEATURE_I_CACHE
> + | LM32_FEATURE_D_CACHE
> + | LM32_FEATURE_CYCLE_COUNT),
> + }
> +};
> +
> +void cpu_lm32_list(FILE *f, fprintf_function cpu_fprintf)
> +{
> + int i;
> +
> + cpu_fprintf(f, "Available CPUs:\n");
> + for (i = 0; i < ARRAY_SIZE(lm32_defs); i++) {
> + cpu_fprintf(f, " %s\n", lm32_defs[i].name);
> + }
> +}
> +
> +static const lm32_def_t *cpu_lm32_find_by_name(const char *name)
> +{
> + int i;
> +
> + for (i = 0; i < ARRAY_SIZE(lm32_defs); i++) {
> + if (strcasecmp(name, lm32_defs[i].name) == 0) {
> + return &lm32_defs[i];
> + }
> + }
> +
> + return NULL;
> +}
> +
> +static uint32_t cfg_by_def(const lm32_def_t *def)
> +{
> + uint32_t cfg = 0;
> +
> + if (def->features & LM32_FEATURE_MULTIPLY) {
> + cfg |= CFG_M;
> + }
> +
> + if (def->features & LM32_FEATURE_DIVIDE) {
> + cfg |= CFG_D;
> + }
> +
> + if (def->features & LM32_FEATURE_SHIFT) {
> + cfg |= CFG_S;
> + }
> +
> + if (def->features & LM32_FEATURE_SIGN_EXTEND) {
> + cfg |= CFG_X;
> + }
> +
> + if (def->features & LM32_FEATURE_I_CACHE) {
> + cfg |= CFG_IC;
> + }
> +
> + if (def->features & LM32_FEATURE_D_CACHE) {
> + cfg |= CFG_DC;
> + }
> +
> + if (def->features & LM32_FEATURE_CYCLE_COUNT) {
> + cfg |= CFG_CC;
> + }
> +
> + cfg |= (def->num_interrupts << CFG_INT_SHIFT);
> + cfg |= (def->num_breakpoints << CFG_BP_SHIFT);
> + cfg |= (def->num_watchpoints << CFG_WP_SHIFT);
> + cfg |= (def->revision << CFG_REV_SHIFT);
> +
> + return cfg;
> +}
> +
> +CPUState *cpu_lm32_init(const char *cpu_model)
> +{
> + CPUState *env;
> + const lm32_def_t *def;
> + static int tcg_initialized;
> +
> + def = cpu_lm32_find_by_name(cpu_model);
> + if (!def) {
> + return NULL;
> + }
> +
> + env = qemu_mallocz(sizeof(CPUState));
> +
> + env->features = def->features;
> + env->num_bps = def->num_breakpoints;
> + env->num_wps = def->num_watchpoints;
> + env->cfg = cfg_by_def(def);
> + env->flags = 0;
> +
> + cpu_exec_init(env);
> + cpu_reset(env);
> +
> + if (!tcg_initialized) {
> + tcg_initialized = 1;
> + lm32_translate_init();
> + }
> +
> + return env;
> +}
> +
> +/* Some soc ignores the MSB on the address bus. Thus creating a shadow memory
> + * area. As a general rule, 0x00000000-0x7fffffff is cached, whereas
> + * 0x80000000-0xffffffff is not cached and used to access IO devices. */
> +void cpu_lm32_set_phys_msb_ignore(CPUState *env, int value)
> +{
> + if (value) {
> + env->flags |= LM32_FLAG_IGNORE_MSB;
> + } else {
> + env->flags &= ~LM32_FLAG_IGNORE_MSB;
> + }
> +}
> +
> +void cpu_reset(CPUState *env)
> +{
> + if (qemu_loglevel_mask(CPU_LOG_RESET)) {
> + qemu_log("CPU Reset (CPU %d)\n", env->cpu_index);
> + log_cpu_state(env, 0);
> + }
> +
> + tlb_flush(env, 1);
> +
> + /* reset cpu state */
> + memset(env, 0, offsetof(CPULM32State, breakpoints));
> +}
> +
> diff --git a/target-lm32/lm32-decode.h b/target-lm32/lm32-decode.h
> new file mode 100644
> index 0000000..f745b39
> --- /dev/null
> +++ b/target-lm32/lm32-decode.h
> @@ -0,0 +1,78 @@
> +/*
> + * LatticeMico32 instruction decoding macros.
> + *
> + * Copyright (c) 2010 Michael Walle <address@hidden>
> + *
> + * This library is free software; you can redistribute it and/or
> + * modify it under the terms of the GNU Lesser General Public
> + * License as published by the Free Software Foundation; either
> + * version 2 of the License, or (at your option) any later version.
> + *
> + * This library is distributed in the hope that it will be useful,
> + * but WITHOUT ANY WARRANTY; without even the implied warranty of
> + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
> + * Lesser General Public License for more details.
> + *
> + * You should have received a copy of the GNU Lesser General Public
> + * License along with this library; if not, see
> <http://www.gnu.org/licenses/>.
> + */
> +
> +/* Convenient binary macros */
> +#define HEX__(n) 0x##n##LU
> +#define B8__(x) (((x&0x0000000FLU) ? 1 : 0) \
> + + ((x&0x000000F0LU) ? 2 : 0) \
> + + ((x&0x00000F00LU) ? 4 : 0) \
> + + ((x&0x0000F000LU) ? 8 : 0) \
> + + ((x&0x000F0000LU) ? 16 : 0) \
> + + ((x&0x00F00000LU) ? 32 : 0) \
> + + ((x&0x0F000000LU) ? 64 : 0) \
> + + ((x&0xF0000000LU) ? 128 : 0))
> +#define B8(d) ((unsigned char)B8__(HEX__(d)))
> +
> +/* Decode logic, value and mask. */
> +#define DEC_ADD {B8(00001101), B8(00011111)}
> +#define DEC_AND {B8(00001000), B8(00011111)}
> +#define DEC_ANDHI {B8(00011000), B8(00111111)}
> +#define DEC_B {B8(00110000), B8(00111111)}
> +#define DEC_BI {B8(00111000), B8(00111111)}
> +#define DEC_BE {B8(00010001), B8(00111111)}
> +#define DEC_BG {B8(00010010), B8(00111111)}
> +#define DEC_BGE {B8(00010011), B8(00111111)}
> +#define DEC_BGEU {B8(00010100), B8(00111111)}
> +#define DEC_BGU {B8(00010101), B8(00111111)}
> +#define DEC_BNE {B8(00010111), B8(00111111)}
> +#define DEC_CALL {B8(00110110), B8(00111111)}
> +#define DEC_CALLI {B8(00111110), B8(00111111)}
> +#define DEC_CMPE {B8(00011001), B8(00011111)}
> +#define DEC_CMPG {B8(00011010), B8(00011111)}
> +#define DEC_CMPGE {B8(00011011), B8(00011111)}
> +#define DEC_CMPGEU {B8(00011100), B8(00011111)}
> +#define DEC_CMPGU {B8(00011101), B8(00011111)}
> +#define DEC_CMPNE {B8(00011111), B8(00011111)}
> +#define DEC_DIVU {B8(00100011), B8(00111111)}
> +#define DEC_LB {B8(00000100), B8(00111111)}
> +#define DEC_LBU {B8(00010000), B8(00111111)}
> +#define DEC_LH {B8(00000111), B8(00111111)}
> +#define DEC_LHU {B8(00001011), B8(00111111)}
> +#define DEC_LW {B8(00001010), B8(00111111)}
> +#define DEC_MODU {B8(00110001), B8(00111111)}
> +#define DEC_MUL {B8(00000010), B8(00011111)}
> +#define DEC_NOR {B8(00000001), B8(00011111)}
> +#define DEC_OR {B8(00001110), B8(00011111)}
> +#define DEC_ORHI {B8(00011110), B8(00111111)}
> +#define DEC_RAISE {B8(00101011), B8(00111111)}
> +#define DEC_RCSR {B8(00100100), B8(00111111)}
> +#define DEC_SB {B8(00001100), B8(00111111)}
> +#define DEC_SEXTB {B8(00101100), B8(00111111)}
> +#define DEC_SEXTH {B8(00110111), B8(00111111)}
> +#define DEC_SH {B8(00000011), B8(00111111)}
> +#define DEC_SL {B8(00001111), B8(00011111)}
> +#define DEC_SR {B8(00000101), B8(00011111)}
> +#define DEC_SRU {B8(00000000), B8(00011111)}
> +#define DEC_SUB {B8(00110010), B8(00111111)}
> +#define DEC_SW {B8(00010110), B8(00111111)}
> +#define DEC_USER {B8(00110011), B8(00111111)}
> +#define DEC_WCSR {B8(00110100), B8(00111111)}
> +#define DEC_XNOR {B8(00001001), B8(00011111)}
> +#define DEC_XOR {B8(00000110), B8(00011111)}
> +
> diff --git a/target-lm32/translate.c b/target-lm32/translate.c
> new file mode 100644
> index 0000000..d49f798
> --- /dev/null
> +++ b/target-lm32/translate.c
> @@ -0,0 +1,1331 @@
> +/*
> + * LatticeMico32 main translation routines.
> + *
> + * Copyright (c) 2010 Michael Walle <address@hidden>
> + *
> + * This library is free software; you can redistribute it and/or
> + * modify it under the terms of the GNU Lesser General Public
> + * License as published by the Free Software Foundation; either
> + * version 2 of the License, or (at your option) any later version.
> + *
> + * This library is distributed in the hope that it will be useful,
> + * but WITHOUT ANY WARRANTY; without even the implied warranty of
> + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
> + * Lesser General Public License for more details.
> + *
> + * You should have received a copy of the GNU Lesser General Public
> + * License along with this library; if not, see
> <http://www.gnu.org/licenses/>.
> + */
> +
> +#include <stdarg.h>
> +#include <stdlib.h>
> +#include <stdio.h>
> +#include <string.h>
> +#include <inttypes.h>
> +#include <assert.h>
> +
> +#include "cpu.h"
> +#include "exec-all.h"
> +#include "disas.h"
> +#include "helper.h"
> +#include "tcg-op.h"
> +#include "lm32-decode.h"
> +#include "qemu-common.h"
> +
> +#include "hw/lm32_pic.h"
> +
> +#define GEN_HELPER 1
> +#include "helper.h"
> +
> +#define DISAS_LM32 1
> +#if DISAS_LM32
> +# define LOG_DIS(...) qemu_log_mask(CPU_LOG_TB_IN_ASM, ## __VA_ARGS__)
> +#else
> +# define LOG_DIS(...) do { } while (0)
> +#endif
> +
> +#define EXTRACT_FIELD(src, start, end) \
> + (((src) >> start) & ((1 << (end - start + 1)) - 1))
> +
> +#define MEM_INDEX 0
> +
> +static TCGv_ptr cpu_env;
> +static TCGv cpu_R[32];
> +static TCGv cpu_pc;
> +static TCGv cpu_ie;
> +static TCGv cpu_icc;
> +static TCGv cpu_dcc;
> +static TCGv cpu_cc;
> +static TCGv cpu_cfg;
> +static TCGv cpu_eba;
> +static TCGv cpu_dc;
> +static TCGv cpu_deba;
> +static TCGv cpu_bp[4];
> +static TCGv cpu_wp[4];
> +
> +#include "gen-icount.h"
> +
> +enum {
> + OP_FMT_RI,
> + OP_FMT_RR,
> + OP_FMT_CR,
> + OP_FMT_I
> +};
> +
> +#define JMP_NOJMP 0
> +#define JMP_DIRECT 1
> +#define JMP_INDIRECT 2
These don't seem to be used, can we remove them?
> +
> +/* This is the state at translation time. */
> +typedef struct DisasContext {
> + CPUState *env;
> + target_ulong pc;
> +
> + /* Decoder. */
> + int format;
> + uint32_t ir;
> + uint8_t opcode;
> + uint8_t r0, r1, r2, csr;
> + uint16_t imm5;
> + uint16_t imm16;
> + uint32_t imm26;
> +
> + unsigned int delayed_branch;
> + unsigned int tb_flags, synced_flags; /* tb dependent flags. */
> + int is_jmp;
> +
> + unsigned int jmp;
> + uint32_t jmp_pc;
These too.
> +
> + int nr_nops;
This should probably go aswell..
> + struct TranslationBlock *tb;
> + int singlestep_enabled;
> +} DisasContext;
> +
> +static const char *regnames[] = {
> + "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7",
> + "r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15",
> + "r16", "r17", "r18", "r19", "r20", "r21", "r22", "r23",
> + "r24", "r25", "r26/gp", "r27/fp", "r28/sp", "r29/ra",
> + "r30/ea", "r31/ba", "bp0", "bp1", "bp2", "bp3", "wp0",
> + "wp1", "wp2", "wp3"
> +};
> +
> +static inline int zero_extend(unsigned int val, int width)
> +{
> + return val & ((1 << width) - 1);
> +}
> +
> +static inline int sign_extend(unsigned int val, int width)
> +{
> + int sval;
> +
> + /* LSL. */
> + val <<= 32 - width;
> + sval = val;
> + /* ASR. */
> + sval >>= 32 - width;
> +
> + return sval;
> +}
> +
> +static inline void t_gen_raise_exception(DisasContext *dc, uint32_t index)
> +{
> + TCGv_i32 tmp = tcg_const_i32(index);
> +
> + gen_helper_raise_exception(tmp);
> + tcg_temp_free_i32(tmp);
> +}
> +
> +static void gen_goto_tb(DisasContext *dc, int n, target_ulong dest)
> +{
> + TranslationBlock *tb;
> +
> + tb = dc->tb;
> + if ((tb->pc & TARGET_PAGE_MASK) == (dest & TARGET_PAGE_MASK) &&
> + likely(!dc->singlestep_enabled)) {
> + tcg_gen_goto_tb(n);
> + tcg_gen_movi_tl(cpu_pc, dest);
> + tcg_gen_exit_tb((long)tb + n);
> + } else {
> + tcg_gen_movi_tl(cpu_pc, dest);
> + if (dc->singlestep_enabled) {
> + t_gen_raise_exception(dc, EXCP_DEBUG);
> + }
> + tcg_gen_exit_tb(0);
> + }
> +}
> +
> +static void dec_add(DisasContext *dc)
> +{
> + if (dc->format == OP_FMT_RI) {
> + if (dc->r0 == R_R0) {
> + if (dc->r1 == R_R0 && dc->imm16 == 0) {
> + LOG_DIS("nop\n");
> + } else {
> + LOG_DIS("mvi r%d, %d\n", dc->r1, sign_extend(dc->imm16, 16));
> + }
> + } else {
> + LOG_DIS("addi r%d, r%d, %d\n", dc->r1, dc->r0,
> + sign_extend(dc->imm16, 16));
> + }
> + } else {
> + LOG_DIS("add r%d, r%d, r%d\n", dc->r2, dc->r0, dc->r1);
> + }
> +
> + if (dc->format == OP_FMT_RI) {
> + tcg_gen_addi_tl(cpu_R[dc->r1], cpu_R[dc->r0],
> + sign_extend(dc->imm16, 16));
> + } else {
> + tcg_gen_add_tl(cpu_R[dc->r2], cpu_R[dc->r0], cpu_R[dc->r1]);
> + }
> +}
> +
> +static void dec_and(DisasContext *dc)
> +{
> + if (dc->format == OP_FMT_RI) {
> + LOG_DIS("andi r%d, r%d, %d\n", dc->r1, dc->r0,
> + zero_extend(dc->imm16, 16));
> + } else {
> + LOG_DIS("and r%d, r%d, r%d\n", dc->r2, dc->r0, dc->r1);
> + }
> +
> + if (dc->format == OP_FMT_RI) {
> + tcg_gen_andi_tl(cpu_R[dc->r1], cpu_R[dc->r0],
> + zero_extend(dc->imm16, 16));
> + } else {
> + if (dc->r0 == 0 && dc->r1 == 0 && dc->r2 == 0) {
> + tcg_gen_movi_tl(cpu_pc, dc->pc + 4);
> + gen_helper_hlt();
> + } else {
> + tcg_gen_and_tl(cpu_R[dc->r2], cpu_R[dc->r0], cpu_R[dc->r1]);
> + }
> + }
> +}
> +
> +static void dec_andhi(DisasContext *dc)
> +{
> + LOG_DIS("andhi r%d, r%d, %d\n", dc->r2, dc->r0, dc->imm16);
> +
> + tcg_gen_andi_tl(cpu_R[dc->r1], cpu_R[dc->r0], (dc->imm16 << 16));
> +}
> +
> +static void dec_b(DisasContext *dc)
> +{
> + if (dc->r0 == R_RA) {
> + LOG_DIS("ret\n");
> + } else if (dc->r0 == R_EA) {
> + LOG_DIS("eret\n");
> + } else if (dc->r0 == R_BA) {
> + LOG_DIS("bret\n");
> + } else {
> + LOG_DIS("b r%d\n", dc->r0);
> + }
> +
> + /* restore IE.IE in case of an eret */
> + if (dc->r0 == R_EA) {
> + TCGv t0 = tcg_temp_new();
> + int l1 = gen_new_label();
> + tcg_gen_andi_tl(t0, cpu_ie, IE_EIE);
> + tcg_gen_ori_tl(cpu_ie, cpu_ie, IE_IE);
> + tcg_gen_brcondi_tl(TCG_COND_EQ, t0, IE_EIE, l1);
> + tcg_gen_andi_tl(cpu_ie, cpu_ie, ~IE_IE);
> + gen_set_label(l1);
> + tcg_temp_free(t0);
> + } else if (dc->r0 == R_BA) {
> + TCGv t0 = tcg_temp_new();
> + int l1 = gen_new_label();
> + tcg_gen_andi_tl(t0, cpu_ie, IE_BIE);
> + tcg_gen_ori_tl(cpu_ie, cpu_ie, IE_IE);
> + tcg_gen_brcondi_tl(TCG_COND_EQ, t0, IE_BIE, l1);
> + tcg_gen_andi_tl(cpu_ie, cpu_ie, ~IE_IE);
> + gen_set_label(l1);
> + tcg_temp_free(t0);
> + }
> + tcg_gen_mov_tl(cpu_pc, cpu_R[dc->r0]);
> +
> + dc->is_jmp = DISAS_JUMP;
> +}
> +
> +static void dec_bi(DisasContext *dc)
> +{
> + LOG_DIS("bi %d\n", sign_extend(dc->imm26 << 2, 26));
> +
> + gen_goto_tb(dc, 0, dc->pc + (sign_extend(dc->imm26 << 2, 26)));
> +
> + dc->is_jmp = DISAS_TB_JUMP;
> +}
> +
> +static inline void gen_cond_branch(DisasContext *dc, int cond)
> +{
> + int l1;
> +
> + l1 = gen_new_label();
> + tcg_gen_brcond_tl(cond, cpu_R[dc->r0], cpu_R[dc->r1], l1);
> + gen_goto_tb(dc, 0, dc->pc + 4);
> + gen_set_label(l1);
> + gen_goto_tb(dc, 1, dc->pc + (sign_extend(dc->imm16 << 2, 16)));
> + dc->is_jmp = DISAS_TB_JUMP;
> +}
> +
> +static void dec_be(DisasContext *dc)
> +{
> + LOG_DIS("be r%d, r%d, %d\n", dc->r0, dc->r1,
> + sign_extend(dc->imm16, 16) * 4);
> +
> + gen_cond_branch(dc, TCG_COND_EQ);
> +}
> +
> +static void dec_bg(DisasContext *dc)
> +{
> + LOG_DIS("bg r%d, r%d, %d\n", dc->r0, dc->r1,
> + sign_extend(dc->imm16, 16 * 4));
> +
> + gen_cond_branch(dc, TCG_COND_GT);
> +}
> +
> +static void dec_bge(DisasContext *dc)
> +{
> + LOG_DIS("bge r%d, r%d, %d\n", dc->r0, dc->r1,
> + sign_extend(dc->imm16, 16) * 4);
> +
> + gen_cond_branch(dc, TCG_COND_GE);
> +}
> +
> +static void dec_bgeu(DisasContext *dc)
> +{
> + LOG_DIS("bgeu r%d, r%d, %d\n", dc->r0, dc->r1,
> + sign_extend(dc->imm16, 16) * 4);
> +
> + gen_cond_branch(dc, TCG_COND_GEU);
> +}
> +
> +static void dec_bgu(DisasContext *dc)
> +{
> + LOG_DIS("bgu r%d, r%d, %d\n", dc->r0, dc->r1,
> + sign_extend(dc->imm16, 16) * 4);
> +
> + gen_cond_branch(dc, TCG_COND_GTU);
> +}
> +
> +static void dec_bne(DisasContext *dc)
> +{
> + LOG_DIS("bne r%d, r%d, %d\n", dc->r0, dc->r1,
> + sign_extend(dc->imm16, 16) * 4);
> +
> + gen_cond_branch(dc, TCG_COND_NE);
> +}
> +
> +static void dec_call(DisasContext *dc)
> +{
> + LOG_DIS("call r%d\n", dc->r0);
> +
> + tcg_gen_movi_tl(cpu_R[R_RA], dc->pc + 4);
> + tcg_gen_mov_tl(cpu_pc, cpu_R[dc->r0]);
> +
> + dc->is_jmp = DISAS_JUMP;
> +}
> +
> +static void dec_calli(DisasContext *dc)
> +{
> + LOG_DIS("calli %d\n", sign_extend(dc->imm26, 26) * 4);
> +
> + tcg_gen_movi_tl(cpu_R[R_RA], dc->pc + 4);
> + gen_goto_tb(dc, 0, dc->pc + (sign_extend(dc->imm26 << 2, 26)));
> +
> + dc->is_jmp = DISAS_TB_JUMP;
> +}
> +
> +static inline void gen_compare(DisasContext *dc, int cond)
> +{
> + int rX = (dc->format == OP_FMT_RR) ? dc->r2 : dc->r1;
> + int rY = (dc->format == OP_FMT_RR) ? dc->r0 : dc->r0;
> + int rZ = (dc->format == OP_FMT_RR) ? dc->r1 : -1;
> +
> + int l1, l2;
> +
> + l1 = gen_new_label();
> + l2 = gen_new_label();
> +
> + if (dc->format == OP_FMT_RI) {
> + tcg_gen_brcondi_tl(cond, cpu_R[rY], sign_extend(dc->imm16, 16), l1);
> + } else {
> + tcg_gen_brcond_tl(cond, cpu_R[rY], cpu_R[rZ], l1);
> + }
> + tcg_gen_movi_tl(cpu_R[rX], 0);
> + tcg_gen_br(l2);
> + gen_set_label(l1);
> + tcg_gen_movi_tl(cpu_R[rX], 1);
> + gen_set_label(l2);
> +}
> +
> +static void dec_cmpe(DisasContext *dc)
> +{
> + if (dc->format == OP_FMT_RI) {
> + LOG_DIS("cmpei r%d, r%d, %d\n", dc->r0, dc->r1,
> + sign_extend(dc->imm16, 16));
> + } else {
> + LOG_DIS("cmpe r%d, r%d, r%d\n", dc->r2, dc->r0, dc->r1);
> + }
> +
> + gen_compare(dc, TCG_COND_EQ);
> +}
> +
> +static void dec_cmpg(DisasContext *dc)
> +{
> + if (dc->format == OP_FMT_RI) {
> + LOG_DIS("cmpgi r%d, r%d, %d\n", dc->r0, dc->r1,
> + sign_extend(dc->imm16, 16));
> + } else {
> + LOG_DIS("cmpg r%d, r%d, r%d\n", dc->r2, dc->r0, dc->r1);
> + }
> +
> + gen_compare(dc, TCG_COND_GT);
> +}
> +
> +static void dec_cmpge(DisasContext *dc)
> +{
> + if (dc->format == OP_FMT_RI) {
> + LOG_DIS("cmpgei r%d, r%d, %d\n", dc->r0, dc->r1,
> + sign_extend(dc->imm16, 16));
> + } else {
> + LOG_DIS("cmpge r%d, r%d, r%d\n", dc->r2, dc->r0, dc->r1);
> + }
> +
> + gen_compare(dc, TCG_COND_GE);
> +}
> +
> +static void dec_cmpgeu(DisasContext *dc)
> +{
> + if (dc->format == OP_FMT_RI) {
> + LOG_DIS("cmpgeui r%d, r%d, %d\n", dc->r0, dc->r1,
> + sign_extend(dc->imm16, 16));
> + } else {
> + LOG_DIS("cmpgeu r%d, r%d, r%d\n", dc->r2, dc->r0, dc->r1);
> + }
> +
> + gen_compare(dc, TCG_COND_GEU);
> +}
> +
> +static void dec_cmpgu(DisasContext *dc)
> +{
> + if (dc->format == OP_FMT_RI) {
> + LOG_DIS("cmpgui r%d, r%d, %d\n", dc->r0, dc->r1,
> + sign_extend(dc->imm16, 16));
> + } else {
> + LOG_DIS("cmpgu r%d, r%d, r%d\n", dc->r2, dc->r0, dc->r1);
> + }
> +
> + gen_compare(dc, TCG_COND_GTU);
> +}
> +
> +static void dec_cmpne(DisasContext *dc)
> +{
> + if (dc->format == OP_FMT_RI) {
> + LOG_DIS("cmpnei r%d, r%d, %d\n", dc->r0, dc->r1,
> + sign_extend(dc->imm16, 16));
> + } else {
> + LOG_DIS("cmpne r%d, r%d, r%d\n", dc->r2, dc->r0, dc->r1);
> + }
> +
> + gen_compare(dc, TCG_COND_NE);
> +}
> +
> +static void dec_divu(DisasContext *dc)
> +{
> + int l1;
> +
> + LOG_DIS("divu r%d, r%d, r%d\n", dc->r2, dc->r0, dc->r1);
> +
> + if (!(dc->env->features & LM32_FEATURE_DIVIDE)) {
> + cpu_abort(dc->env, "hardware divider is not available\n");
> + }
> +
> + l1 = gen_new_label();
> + tcg_gen_brcondi_tl(TCG_COND_NE, cpu_R[dc->r1], 0, l1);
> + tcg_gen_movi_tl(cpu_pc, dc->pc);
> + t_gen_raise_exception(dc, EXCP_DIVIDE_BY_ZERO);
> + gen_set_label(l1);
> + tcg_gen_divu_tl(cpu_R[dc->r2], cpu_R[dc->r0], cpu_R[dc->r1]);
> +}
> +
> +static void dec_lb(DisasContext *dc)
> +{
> + TCGv t0;
> +
> + LOG_DIS("lb r%d, (r%d+%d)\n", dc->r1, dc->r0, dc->imm16);
> +
> + t0 = tcg_temp_new();
> + tcg_gen_addi_tl(t0, cpu_R[dc->r0], sign_extend(dc->imm16, 16));
> + tcg_gen_qemu_ld8s(cpu_R[dc->r1], t0, MEM_INDEX);
> + tcg_temp_free(t0);
> +}
> +
> +static void dec_lbu(DisasContext *dc)
> +{
> + TCGv t0;
> +
> + LOG_DIS("lbu r%d, (r%d+%d)\n", dc->r1, dc->r0, dc->imm16);
> +
> + t0 = tcg_temp_new();
> + tcg_gen_addi_tl(t0, cpu_R[dc->r0], sign_extend(dc->imm16, 16));
> + tcg_gen_qemu_ld8u(cpu_R[dc->r1], t0, MEM_INDEX);
> + tcg_temp_free(t0);
> +}
> +
> +static void dec_lh(DisasContext *dc)
> +{
> + TCGv t0;
> +
> + LOG_DIS("lh r%d, (r%d+%d)\n", dc->r1, dc->r0, dc->imm16);
> +
> + t0 = tcg_temp_new();
> + tcg_gen_addi_tl(t0, cpu_R[dc->r0], sign_extend(dc->imm16, 16));
> + tcg_gen_qemu_ld16s(cpu_R[dc->r1], t0, MEM_INDEX);
> + tcg_temp_free(t0);
> +}
> +
> +static void dec_lhu(DisasContext *dc)
> +{
> + TCGv t0;
> +
> + LOG_DIS("lhu r%d, (r%d+%d)\n", dc->r1, dc->r0, dc->imm16);
> +
> + t0 = tcg_temp_new();
> + tcg_gen_addi_tl(t0, cpu_R[dc->r0], sign_extend(dc->imm16, 16));
> + tcg_gen_qemu_ld16u(cpu_R[dc->r1], t0, MEM_INDEX);
> + tcg_temp_free(t0);
> +}
> +
> +static void dec_lw(DisasContext *dc)
> +{
> + TCGv t0;
> +
> + LOG_DIS("lw r%d, (r%d+%d)\n", dc->r1, dc->r0, sign_extend(dc->imm16,
> 16));
> +
> + t0 = tcg_temp_new();
> + tcg_gen_addi_tl(t0, cpu_R[dc->r0], sign_extend(dc->imm16, 16));
> + tcg_gen_qemu_ld32s(cpu_R[dc->r1], t0, MEM_INDEX);
> + tcg_temp_free(t0);
> +}
> +
> +static void dec_modu(DisasContext *dc)
> +{
> + int l1;
> +
> + LOG_DIS("modu r%d, r%d, %d\n", dc->r2, dc->r0, dc->r1);
> +
> + if (!(dc->env->features & LM32_FEATURE_DIVIDE)) {
> + cpu_abort(dc->env, "hardware divider is not available\n");
> + }
> +
> + l1 = gen_new_label();
> + tcg_gen_brcondi_tl(TCG_COND_NE, cpu_R[dc->r1], 0, l1);
> + tcg_gen_movi_tl(cpu_pc, dc->pc);
> + t_gen_raise_exception(dc, EXCP_DIVIDE_BY_ZERO);
> + gen_set_label(l1);
> + tcg_gen_remu_tl(cpu_R[dc->r2], cpu_R[dc->r0], cpu_R[dc->r1]);
> +}
> +
> +static void dec_mul(DisasContext *dc)
> +{
> + if (dc->format == OP_FMT_RI) {
> + LOG_DIS("muli r%d, r%d, %d\n", dc->r0, dc->r1,
> + sign_extend(dc->imm16, 16));
> + } else {
> + LOG_DIS("mul r%d, r%d, r%d\n", dc->r2, dc->r0, dc->r1);
> + }
> +
> + if (!(dc->env->features & LM32_FEATURE_MULTIPLY)) {
> + cpu_abort(dc->env, "hardware multiplier is not available\n");
> + }
> +
> + if (dc->format == OP_FMT_RI) {
> + tcg_gen_muli_tl(cpu_R[dc->r1], cpu_R[dc->r0],
> + sign_extend(dc->imm16, 16));
> + } else {
> + tcg_gen_mul_tl(cpu_R[dc->r2], cpu_R[dc->r0], cpu_R[dc->r1]);
> + }
> +}
> +
> +static void dec_nor(DisasContext *dc)
> +{
> + if (dc->format == OP_FMT_RI) {
> + LOG_DIS("nori r%d, r%d, %d\n", dc->r0, dc->r1,
> + zero_extend(dc->imm16, 16));
> + } else {
> + LOG_DIS("nor r%d, r%d, r%d\n", dc->r2, dc->r0, dc->r1);
> + }
> +
> + if (dc->format == OP_FMT_RI) {
> + TCGv t0 = tcg_temp_new();
> + tcg_gen_movi_tl(t0, zero_extend(dc->imm16, 16));
> + tcg_gen_nor_tl(cpu_R[dc->r1], cpu_R[dc->r0], t0);
> + tcg_temp_free(t0);
> + } else {
> + tcg_gen_nor_tl(cpu_R[dc->r2], cpu_R[dc->r0], cpu_R[dc->r1]);
> + }
> +}
> +
> +static void dec_or(DisasContext *dc)
> +{
> + if (dc->format == OP_FMT_RI) {
> + LOG_DIS("ori r%d, r%d, %d\n", dc->r1, dc->r0,
> + zero_extend(dc->imm16, 16));
> + } else {
> + if (dc->r1 == R_R0) {
> + LOG_DIS("mv r%d, r%d\n", dc->r2, dc->r0);
> + } else {
> + LOG_DIS("or r%d, r%d, r%d\n", dc->r2, dc->r0, dc->r1);
> + }
> + }
> +
> + if (dc->format == OP_FMT_RI) {
> + tcg_gen_ori_tl(cpu_R[dc->r1], cpu_R[dc->r0],
> + zero_extend(dc->imm16, 16));
> + } else {
> + tcg_gen_or_tl(cpu_R[dc->r2], cpu_R[dc->r0], cpu_R[dc->r1]);
> + }
> +}
> +
> +static void dec_orhi(DisasContext *dc)
> +{
> + if (dc->r0 == R_R0) {
> + LOG_DIS("mvhi r%d, %d\n", dc->r1, dc->imm16);
> + } else {
> + LOG_DIS("orhi r%d, r%d, %d\n", dc->r1, dc->r0, dc->imm16);
> + }
> +
> + tcg_gen_ori_tl(cpu_R[dc->r1], cpu_R[dc->r0], (dc->imm16 << 16));
> +}
> +
> +static void dec_raise(DisasContext *dc)
> +{
> + TCGv t0;
> + int l1;
> +
> + if (dc->imm5 == 7) {
> + LOG_DIS("scall\n");
> + } else if (dc->imm5 == 2) {
> + LOG_DIS("break\n");
> + } else {
> + cpu_abort(dc->env, "invalid opcode\n");
> + }
> +
> + t0 = tcg_temp_new();
> + l1 = gen_new_label();
> +
> + /* save IE.IE */
> + tcg_gen_andi_tl(t0, cpu_ie, IE_IE);
> +
> + /* IE.IE = 0 */
> + tcg_gen_andi_tl(cpu_ie, cpu_ie, ~IE_IE);
> +
> + if (dc->imm5 == 7) {
> + /* IE.EIE = IE.IE */
> + tcg_gen_ori_tl(cpu_ie, cpu_ie, IE_EIE);
> + tcg_gen_brcondi_tl(TCG_COND_EQ, t0, IE_IE, l1);
> + tcg_gen_andi_tl(cpu_ie, cpu_ie, ~IE_EIE);
> + gen_set_label(l1);
> +
> + /* gpr[ea] = PC */
> + tcg_gen_movi_tl(cpu_R[R_EA], dc->pc);
> + tcg_temp_free(t0);
> +
> + tcg_gen_movi_tl(cpu_pc, dc->pc);
> + t_gen_raise_exception(dc, EXCP_SYSTEMCALL);
> + } else {
> + /* IE.BIE = IE.IE */
> + tcg_gen_ori_tl(cpu_ie, cpu_ie, IE_BIE);
> + tcg_gen_brcondi_tl(TCG_COND_EQ, t0, IE_IE, l1);
> + tcg_gen_andi_tl(cpu_ie, cpu_ie, ~IE_BIE);
> + gen_set_label(l1);
> +
> + /* gpr[ba] = PC */
> + tcg_gen_movi_tl(cpu_R[R_BA], dc->pc);
> + tcg_temp_free(t0);
> +
> + tcg_gen_movi_tl(cpu_pc, dc->pc);
> + t_gen_raise_exception(dc, EXCP_BREAKPOINT);
> + }
> +}
> +
> +static void dec_rcsr(DisasContext *dc)
> +{
> + LOG_DIS("rcsr r%d, %d\n", dc->r2, dc->csr);
> +
> + switch (dc->csr) {
> + case CSR_IE:
> + tcg_gen_mov_tl(cpu_R[dc->r2], cpu_ie);
> + break;
> + case CSR_IM:
> + gen_helper_rcsr_im(cpu_R[dc->r2]);
> + break;
> + case CSR_IP:
> + gen_helper_rcsr_ip(cpu_R[dc->r2]);
> + break;
> + case CSR_CC:
> + tcg_gen_mov_tl(cpu_R[dc->r2], cpu_cc);
> + break;
> + case CSR_CFG:
> + tcg_gen_mov_tl(cpu_R[dc->r2], cpu_cfg);
> + break;
> + case CSR_EBA:
> + tcg_gen_mov_tl(cpu_R[dc->r2], cpu_eba);
> + break;
> + case CSR_DC:
> + tcg_gen_mov_tl(cpu_R[dc->r2], cpu_dc);
> + break;
> + case CSR_DEBA:
> + tcg_gen_mov_tl(cpu_R[dc->r2], cpu_deba);
> + break;
> + case CSR_JTX:
> + gen_helper_rcsr_jtx(cpu_R[dc->r2]);
> + break;
> + case CSR_JRX:
> + gen_helper_rcsr_jrx(cpu_R[dc->r2]);
> + break;
> + case CSR_ICC:
> + case CSR_DCC:
> + case CSR_BP0:
> + case CSR_BP1:
> + case CSR_BP2:
> + case CSR_BP3:
> + case CSR_WP0:
> + case CSR_WP1:
> + case CSR_WP2:
> + case CSR_WP3:
> + cpu_abort(dc->env, "invalid read access csr=%x\n", dc->csr);
> + break;
> + default:
> + cpu_abort(dc->env, "read_csr: unknown csr=%x\n", dc->csr);
> + break;
> + }
> +}
> +
> +static void dec_sb(DisasContext *dc)
> +{
> + TCGv t0;
> +
> + LOG_DIS("sb (r%d+%d), r%d\n", dc->r0, dc->imm16, dc->r1);
> +
> + t0 = tcg_temp_new();
> + tcg_gen_addi_tl(t0, cpu_R[dc->r0], sign_extend(dc->imm16, 16));
> + tcg_gen_qemu_st8(cpu_R[dc->r1], t0, MEM_INDEX);
> + tcg_temp_free(t0);
> +}
> +
> +static void dec_sextb(DisasContext *dc)
> +{
> + LOG_DIS("sextb r%d, r%d\n", dc->r2, dc->r0);
> +
> + if (!(dc->env->features & LM32_FEATURE_SIGN_EXTEND)) {
> + cpu_abort(dc->env, "hardware sign extender is not available\n");
> + }
> +
> + tcg_gen_ext8s_tl(cpu_R[dc->r2], cpu_R[dc->r0]);
> +}
> +
> +static void dec_sexth(DisasContext *dc)
> +{
> + LOG_DIS("sexth r%d, r%d\n", dc->r2, dc->r0);
> +
> + if (!(dc->env->features & LM32_FEATURE_SIGN_EXTEND)) {
> + cpu_abort(dc->env, "hardware sign extender is not available\n");
> + }
> +
> + tcg_gen_ext16s_tl(cpu_R[dc->r2], cpu_R[dc->r0]);
> +}
> +
> +static void dec_sh(DisasContext *dc)
> +{
> + TCGv t0;
> +
> + LOG_DIS("sh (r%d+%d), r%d\n", dc->r0, dc->imm16, dc->r1);
> +
> + t0 = tcg_temp_new();
> + tcg_gen_addi_tl(t0, cpu_R[dc->r0], sign_extend(dc->imm16, 16));
> + tcg_gen_qemu_st16(cpu_R[dc->r1], t0, MEM_INDEX);
> + tcg_temp_free(t0);
> +}
> +
> +static void dec_sl(DisasContext *dc)
> +{
> + if (dc->format == OP_FMT_RI) {
> + LOG_DIS("sli r%d, r%d, %d\n", dc->r1, dc->r0, dc->imm5);
> + } else {
> + LOG_DIS("sl r%d, r%d, r%d\n", dc->r2, dc->r0, dc->r1);
> + }
> +
> + if (!(dc->env->features & LM32_FEATURE_SHIFT)) {
> + cpu_abort(dc->env, "hardware shifter is not available\n");
> + }
> +
> + if (dc->format == OP_FMT_RI) {
> + tcg_gen_shli_tl(cpu_R[dc->r1], cpu_R[dc->r0], dc->imm5);
> + } else {
> + TCGv t0 = tcg_temp_new();
> + tcg_gen_andi_tl(t0, cpu_R[dc->r1], 0x1f);
> + tcg_gen_shl_tl(cpu_R[dc->r2], cpu_R[dc->r0], t0);
> + tcg_temp_free(t0);
> + }
> +}
> +
> +static void dec_sr(DisasContext *dc)
> +{
> + if (dc->format == OP_FMT_RI) {
> + LOG_DIS("sri r%d, r%d, %d\n", dc->r1, dc->r0, dc->imm5);
> + } else {
> + LOG_DIS("sr r%d, r%d, r%d\n", dc->r2, dc->r0, dc->r1);
> + }
> +
> + if (!(dc->env->features & LM32_FEATURE_SHIFT)) {
> + if (dc->format == OP_FMT_RI) {
> + /* TODO: check r1 == 1 during runtime */
> + } else {
> + if (dc->imm5 != 1) {
> + cpu_abort(dc->env, "hardware shifter is not available\n");
> + }
> + }
> + }
> +
> + if (dc->format == OP_FMT_RI) {
> + tcg_gen_sari_tl(cpu_R[dc->r1], cpu_R[dc->r0], dc->imm5);
> + } else {
> + TCGv t0 = tcg_temp_new();
> + tcg_gen_andi_tl(t0, cpu_R[dc->r1], 0x1f);
> + tcg_gen_sar_tl(cpu_R[dc->r2], cpu_R[dc->r0], t0);
> + tcg_temp_free(t0);
> + }
> +}
> +
> +static void dec_sru(DisasContext *dc)
> +{
> + if (dc->format == OP_FMT_RI) {
> + LOG_DIS("srui r%d, r%d, %d\n", dc->r1, dc->r0, dc->imm5);
> + } else {
> + LOG_DIS("sru r%d, r%d, r%d\n", dc->r2, dc->r0, dc->r1);
> + }
> +
> + if (!(dc->env->features & LM32_FEATURE_SHIFT)) {
> + if (dc->format == OP_FMT_RI) {
> + /* TODO: check r1 == 1 during runtime */
> + } else {
> + if (dc->imm5 != 1) {
> + cpu_abort(dc->env, "hardware shifter is not available\n");
> + }
> + }
> + }
> +
> + if (dc->format == OP_FMT_RI) {
> + tcg_gen_shri_tl(cpu_R[dc->r1], cpu_R[dc->r0], dc->imm5);
> + } else {
> + TCGv t0 = tcg_temp_new();
> + tcg_gen_andi_tl(t0, cpu_R[dc->r1], 0x1f);
> + tcg_gen_shr_tl(cpu_R[dc->r2], cpu_R[dc->r0], t0);
> + tcg_temp_free(t0);
> + }
> +}
> +
> +static void dec_sub(DisasContext *dc)
> +{
> + LOG_DIS("sub r%d, r%d, r%d\n", dc->r2, dc->r0, dc->r1);
> +
> + tcg_gen_sub_tl(cpu_R[dc->r2], cpu_R[dc->r0], cpu_R[dc->r1]);
> +}
> +
> +static void dec_sw(DisasContext *dc)
> +{
> + TCGv t0;
> +
> + LOG_DIS("sw (r%d+%d), r%d\n", dc->r0, sign_extend(dc->imm16, 16),
> dc->r1);
> +
> + t0 = tcg_temp_new();
> + tcg_gen_addi_tl(t0, cpu_R[dc->r0], sign_extend(dc->imm16, 16));
> + tcg_gen_qemu_st32(cpu_R[dc->r1], t0, MEM_INDEX);
> + tcg_temp_free(t0);
> +}
> +
> +static void dec_user(DisasContext *dc)
> +{
> + LOG_DIS("user");
> +
> + cpu_abort(dc->env, "user insn undefined\n");
> +}
> +
> +static void dec_wcsr(DisasContext *dc)
> +{
> + int no;
> +
> + LOG_DIS("wcsr r%d, %d\n", dc->r1, dc->csr);
> +
> + switch (dc->csr) {
> + case CSR_IE:
> + tcg_gen_mov_tl(cpu_ie, cpu_R[dc->r1]);
> + tcg_gen_movi_tl(cpu_pc, dc->pc + 4);
> + dc->is_jmp = DISAS_UPDATE;
> + break;
> + case CSR_IM:
> + /* mark as an io operation because it could cause an interrupt */
> + if (use_icount) {
> + gen_io_start();
> + }
> + gen_helper_wcsr_im(cpu_R[dc->r1]);
> + tcg_gen_movi_tl(cpu_pc, dc->pc + 4);
> + if (use_icount) {
> + gen_io_end();
> + }
> + dc->is_jmp = DISAS_UPDATE;
> + break;
> + case CSR_IP:
> + /* mark as an io operation because it could cause an interrupt */
> + if (use_icount) {
> + gen_io_start();
> + }
> + gen_helper_wcsr_ip(cpu_R[dc->r1]);
> + tcg_gen_movi_tl(cpu_pc, dc->pc + 4);
> + if (use_icount) {
> + gen_io_end();
> + }
> + dc->is_jmp = DISAS_UPDATE;
> + break;
> + case CSR_ICC:
> + /* TODO */
> + break;
> + case CSR_DCC:
> + /* TODO */
> + break;
> + case CSR_EBA:
> + tcg_gen_mov_tl(cpu_eba, cpu_R[dc->r1]);
> + break;
> + case CSR_DEBA:
> + tcg_gen_mov_tl(cpu_deba, cpu_R[dc->r1]);
> + break;
> + case CSR_JTX:
> + gen_helper_wcsr_jtx(cpu_R[dc->r1]);
> + break;
> + case CSR_JRX:
> + gen_helper_wcsr_jrx(cpu_R[dc->r1]);
> + break;
> + case CSR_DC:
> + tcg_gen_mov_tl(cpu_dc, cpu_R[dc->r1]);
> + break;
> + case CSR_BP0:
> + case CSR_BP1:
> + case CSR_BP2:
> + case CSR_BP3:
> + no = dc->csr - CSR_BP0;
> + if (dc->env->num_bps <= no) {
> + cpu_abort(dc->env, "breakpoint #%i is not available\n", no);
> + }
> + tcg_gen_mov_tl(cpu_bp[no], cpu_R[dc->r1]);
> + break;
> + case CSR_WP0:
> + case CSR_WP1:
> + case CSR_WP2:
> + case CSR_WP3:
> + no = dc->csr - CSR_WP0;
> + if (dc->env->num_wps <= no) {
> + cpu_abort(dc->env, "watchpoint #%i is not available\n", no);
> + }
> + tcg_gen_mov_tl(cpu_wp[no], cpu_R[dc->r1]);
> + break;
> + case CSR_CC:
> + case CSR_CFG:
> + cpu_abort(dc->env, "invalid write access csr=%x\n", dc->csr);
> + break;
> + default:
> + cpu_abort(dc->env, "write_csr unknown csr=%x\n", dc->csr);
> + break;
> + }
> +}
> +
> +static void dec_xnor(DisasContext *dc)
> +{
> + if (dc->format == OP_FMT_RI) {
> + LOG_DIS("xnori r%d, r%d, %d\n", dc->r0, dc->r1,
> + zero_extend(dc->imm16, 16));
> + } else {
> + if (dc->r1 == R_R0) {
> + LOG_DIS("not r%d, r%d\n", dc->r2, dc->r0);
> + } else {
> + LOG_DIS("xnor r%d, r%d, r%d\n", dc->r2, dc->r0, dc->r1);
> + }
> + }
> +
> + if (dc->format == OP_FMT_RI) {
> + tcg_gen_xori_tl(cpu_R[dc->r1], cpu_R[dc->r0],
> + zero_extend(dc->imm16, 16));
> + tcg_gen_not_tl(cpu_R[dc->r1], cpu_R[dc->r1]);
> + } else {
> + tcg_gen_xor_tl(cpu_R[dc->r2], cpu_R[dc->r0], cpu_R[dc->r1]);
> + tcg_gen_not_tl(cpu_R[dc->r2], cpu_R[dc->r2]);
> + }
> +}
> +
> +static void dec_xor(DisasContext *dc)
> +{
> + if (dc->format == OP_FMT_RI) {
> + LOG_DIS("xori r%d, r%d, %d\n", dc->r0, dc->r1,
> + zero_extend(dc->imm16, 16));
> + } else {
> + LOG_DIS("xor r%d, r%d, r%d\n", dc->r2, dc->r0, dc->r1);
> + }
> +
> + if (dc->format == OP_FMT_RI) {
> + tcg_gen_xori_tl(cpu_R[dc->r1], cpu_R[dc->r0],
> + zero_extend(dc->imm16, 16));
> + } else {
> + tcg_gen_xor_tl(cpu_R[dc->r2], cpu_R[dc->r0], cpu_R[dc->r1]);
> + }
> +}
> +
> +static struct decoder_info {
> + struct {
> + uint32_t bits;
> + uint32_t mask;
> + };
> + void (*dec)(DisasContext *dc);
> +} decinfo[] = {
> + {DEC_ADD, dec_add},
> + {DEC_AND, dec_and},
> + {DEC_ANDHI, dec_andhi},
> + {DEC_B, dec_b},
> + {DEC_BI, dec_bi},
> + {DEC_BE, dec_be},
> + {DEC_BG, dec_bg},
> + {DEC_BGE, dec_bge},
> + {DEC_BGEU, dec_bgeu},
> + {DEC_BGU, dec_bgu},
> + {DEC_BNE, dec_bne},
> + {DEC_CALL, dec_call},
> + {DEC_CALLI, dec_calli},
> + {DEC_CMPE, dec_cmpe},
> + {DEC_CMPG, dec_cmpg},
> + {DEC_CMPGE, dec_cmpge},
> + {DEC_CMPGEU, dec_cmpgeu},
> + {DEC_CMPGU, dec_cmpgu},
> + {DEC_CMPNE, dec_cmpne},
> + {DEC_DIVU, dec_divu},
> + {DEC_LB, dec_lb},
> + {DEC_LBU, dec_lbu},
> + {DEC_LH, dec_lh},
> + {DEC_LHU, dec_lhu},
> + {DEC_LW, dec_lw},
> + {DEC_MODU, dec_modu},
> + {DEC_MUL, dec_mul},
> + {DEC_NOR, dec_nor},
> + {DEC_OR, dec_or},
> + {DEC_ORHI, dec_orhi},
> + {DEC_RAISE, dec_raise},
> + {DEC_RCSR, dec_rcsr},
> + {DEC_SB, dec_sb},
> + {DEC_SEXTB, dec_sextb},
> + {DEC_SEXTH, dec_sexth},
> + {DEC_SH, dec_sh},
> + {DEC_SL, dec_sl},
> + {DEC_SR, dec_sr},
> + {DEC_SRU, dec_sru},
> + {DEC_SUB, dec_sub},
> + {DEC_SW, dec_sw},
> + {DEC_USER, dec_user},
> + {DEC_WCSR, dec_wcsr},
> + {DEC_XNOR, dec_xnor},
> + {DEC_XOR, dec_xor},
> +};
> +
> +static inline void decode(DisasContext *dc)
> +{
> + uint32_t ir;
> + int i;
> +
> + if (unlikely(qemu_loglevel_mask(CPU_LOG_TB_OP))) {
> + tcg_gen_debug_insn_start(dc->pc);
> + }
> +
> + dc->ir = ir = ldl_code(dc->pc);
> + LOG_DIS("%8.8x\t", dc->ir);
> +
> + /* try guessing 'empty' instruction memory, although it may be a valid
> + * instruction sequence (eg. srui r0, r0, 0) */
> + if (dc->ir) {
> + dc->nr_nops = 0;
> + } else {
> + LOG_DIS("nr_nops=%d\t", dc->nr_nops);
> + dc->nr_nops++;
> + if (dc->nr_nops > 4) {
> + cpu_abort(dc->env, "fetching nop sequence\n");
> + }
> + }
This nop sequence detection should probably go away. A reminder for
me too to remove it from the microblaze port (from where I guess you
inherited it)..
Cheers
- [Qemu-devel] Re: [PATCH 02/17] lm32: translation routines,
Edgar E. Iglesias <=