mirrors/qemu
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity
deee69a19f
qemu/target/moxie/translate.c
Thomas Huth 70c9483a30 target/moxie: Fix LGPL information in the file headers 
It's either "GNU *Library* General Public License version 2" or "GNU
Lesser General Public License version *2.1*", but there was no "version
2.0" of the "Lesser" license. So assume that version 2.1 is meant here.
Also the files mentioned the GPL instead of the LGPL after declaring
that the files are licensed under the LGPL, so change these spots to
use LGPL, too.

Signed-off-by: Thomas Huth <thuth@redhat.com>
Acked-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <1549266858-5043-1-git-send-email-thuth@redhat.com>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
2019-02-06 15:46:11 +01:00

900 lines
28 KiB
C
Raw Blame History

/*
* Moxie emulation for qemu: main translation routines.
*
* Copyright (c) 2009, 2013 Anthony Green
*
* 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 2.1 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 program. If not, see <http://www.gnu.org/licenses/>.
*/
/* For information on the Moxie architecture, see
* http://moxielogic.org/wiki
*/
#include "qemu/osdep.h"
#include "cpu.h"
#include "exec/exec-all.h"
#include "disas/disas.h"
#include "tcg-op.h"
#include "exec/cpu_ldst.h"
#include "exec/helper-proto.h"
#include "exec/helper-gen.h"
#include "exec/log.h"
/* This is the state at translation time. */
typedef struct DisasContext {
struct TranslationBlock *tb;
target_ulong pc, saved_pc;
uint32_t opcode;
uint32_t fp_status;
/* Routine used to access memory */
int memidx;
int bstate;
target_ulong btarget;
int singlestep_enabled;
} DisasContext;
enum {
BS_NONE = 0, /* We go out of the TB without reaching a branch or an
* exception condition */
BS_STOP = 1, /* We want to stop translation for any reason */
BS_BRANCH = 2, /* We reached a branch condition */
BS_EXCP = 3, /* We reached an exception condition */
};
static TCGv cpu_pc;
static TCGv cpu_gregs[16];
static TCGv cc_a, cc_b;
#include "exec/gen-icount.h"
#define REG(x) (cpu_gregs[x])
/* Extract the signed 10-bit offset from a 16-bit branch
instruction. */
static int extract_branch_offset(int opcode)
{
return (((signed short)((opcode & ((1 << 10) - 1)) << 6)) >> 6) << 1;
}
void moxie_cpu_dump_state(CPUState *cs, FILE *f, fprintf_function cpu_fprintf,
int flags)
{
MoxieCPU *cpu = MOXIE_CPU(cs);
CPUMoxieState *env = &cpu->env;
int i;
cpu_fprintf(f, "pc=0x%08x\n", env->pc);
cpu_fprintf(f, "$fp=0x%08x $sp=0x%08x $r0=0x%08x $r1=0x%08x\n",
env->gregs[0], env->gregs[1], env->gregs[2], env->gregs[3]);
for (i = 4; i < 16; i += 4) {
cpu_fprintf(f, "$r%d=0x%08x $r%d=0x%08x $r%d=0x%08x $r%d=0x%08x\n",
i-2, env->gregs[i], i-1, env->gregs[i + 1],
i, env->gregs[i + 2], i+1, env->gregs[i + 3]);
}
for (i = 4; i < 16; i += 4) {
cpu_fprintf(f, "sr%d=0x%08x sr%d=0x%08x sr%d=0x%08x sr%d=0x%08x\n",
i-2, env->sregs[i], i-1, env->sregs[i + 1],
i, env->sregs[i + 2], i+1, env->sregs[i + 3]);
}
}
void moxie_translate_init(void)
{
int i;
static const char * const gregnames[16] = {
"$fp", "$sp", "$r0", "$r1",
"$r2", "$r3", "$r4", "$r5",
"$r6", "$r7", "$r8", "$r9",
"$r10", "$r11", "$r12", "$r13"
};
cpu_pc = tcg_global_mem_new_i32(cpu_env,
offsetof(CPUMoxieState, pc), "$pc");
for (i = 0; i < 16; i++)
cpu_gregs[i] = tcg_global_mem_new_i32(cpu_env,
offsetof(CPUMoxieState, gregs[i]),
gregnames[i]);
cc_a = tcg_global_mem_new_i32(cpu_env,
offsetof(CPUMoxieState, cc_a), "cc_a");
cc_b = tcg_global_mem_new_i32(cpu_env,
offsetof(CPUMoxieState, cc_b), "cc_b");
}
static inline bool use_goto_tb(DisasContext *ctx, target_ulong dest)
{
if (unlikely(ctx->singlestep_enabled)) {
return false;
}
#ifndef CONFIG_USER_ONLY
return (ctx->tb->pc & TARGET_PAGE_MASK) == (dest & TARGET_PAGE_MASK);
#else
return true;
#endif
}
static inline void gen_goto_tb(CPUMoxieState *env, DisasContext *ctx,
int n, target_ulong dest)
{
if (use_goto_tb(ctx, dest)) {
tcg_gen_goto_tb(n);
tcg_gen_movi_i32(cpu_pc, dest);
tcg_gen_exit_tb(ctx->tb, n);
} else {
tcg_gen_movi_i32(cpu_pc, dest);
if (ctx->singlestep_enabled) {
gen_helper_debug(cpu_env);
}
tcg_gen_exit_tb(NULL, 0);
}
}
static int decode_opc(MoxieCPU *cpu, DisasContext *ctx)
{
CPUMoxieState *env = &cpu->env;
/* Local cache for the instruction opcode. */
int opcode;
/* Set the default instruction length. */
int length = 2;
/* Examine the 16-bit opcode. */
opcode = ctx->opcode;
/* Decode instruction. */
if (opcode & (1 << 15)) {
if (opcode & (1 << 14)) {
/* This is a Form 3 instruction. */
int inst = (opcode >> 10 & 0xf);
#define BRANCH(cond) \
do { \
TCGLabel *l1 = gen_new_label(); \
tcg_gen_brcond_i32(cond, cc_a, cc_b, l1); \
gen_goto_tb(env, ctx, 1, ctx->pc+2); \
gen_set_label(l1); \
gen_goto_tb(env, ctx, 0, extract_branch_offset(opcode) + ctx->pc+2); \
ctx->bstate = BS_BRANCH; \
} while (0)
switch (inst) {
case 0x00: /* beq */
BRANCH(TCG_COND_EQ);
break;
case 0x01: /* bne */
BRANCH(TCG_COND_NE);
break;
case 0x02: /* blt */
BRANCH(TCG_COND_LT);
break;
case 0x03: /* bgt */
BRANCH(TCG_COND_GT);
break;
case 0x04: /* bltu */
BRANCH(TCG_COND_LTU);
break;
case 0x05: /* bgtu */
BRANCH(TCG_COND_GTU);
break;
case 0x06: /* bge */
BRANCH(TCG_COND_GE);
break;
case 0x07: /* ble */
BRANCH(TCG_COND_LE);
break;
case 0x08: /* bgeu */
BRANCH(TCG_COND_GEU);
break;
case 0x09: /* bleu */
BRANCH(TCG_COND_LEU);
break;
default:
{
TCGv temp = tcg_temp_new_i32();
tcg_gen_movi_i32(cpu_pc, ctx->pc);
tcg_gen_movi_i32(temp, MOXIE_EX_BAD);
gen_helper_raise_exception(cpu_env, temp);
tcg_temp_free_i32(temp);
}
break;
}
} else {
/* This is a Form 2 instruction. */
int inst = (opcode >> 12 & 0x3);
switch (inst) {
case 0x00: /* inc */
{
int a = (opcode >> 8) & 0xf;
unsigned int v = (opcode & 0xff);
tcg_gen_addi_i32(REG(a), REG(a), v);
}
break;
case 0x01: /* dec */
{
int a = (opcode >> 8) & 0xf;
unsigned int v = (opcode & 0xff);
tcg_gen_subi_i32(REG(a), REG(a), v);
}
break;
case 0x02: /* gsr */
{
int a = (opcode >> 8) & 0xf;
unsigned v = (opcode & 0xff);
tcg_gen_ld_i32(REG(a), cpu_env,
offsetof(CPUMoxieState, sregs[v]));
}
break;
case 0x03: /* ssr */
{
int a = (opcode >> 8) & 0xf;
unsigned v = (opcode & 0xff);
tcg_gen_st_i32(REG(a), cpu_env,
offsetof(CPUMoxieState, sregs[v]));
}
break;
default:
{
TCGv temp = tcg_temp_new_i32();
tcg_gen_movi_i32(cpu_pc, ctx->pc);
tcg_gen_movi_i32(temp, MOXIE_EX_BAD);
gen_helper_raise_exception(cpu_env, temp);
tcg_temp_free_i32(temp);
}
break;
}
}
} else {
/* This is a Form 1 instruction. */
int inst = opcode >> 8;
switch (inst) {
case 0x00: /* nop */
break;
case 0x01: /* ldi.l (immediate) */
{
int reg = (opcode >> 4) & 0xf;
int val = cpu_ldl_code(env, ctx->pc+2);
tcg_gen_movi_i32(REG(reg), val);
length = 6;
}
break;
case 0x02: /* mov (register-to-register) */
{
int dest = (opcode >> 4) & 0xf;
int src = opcode & 0xf;
tcg_gen_mov_i32(REG(dest), REG(src));
}
break;
case 0x03: /* jsra */
{
TCGv t1 = tcg_temp_new_i32();
TCGv t2 = tcg_temp_new_i32();
tcg_gen_movi_i32(t1, ctx->pc + 6);
/* Make space for the static chain and return address. */
tcg_gen_subi_i32(t2, REG(1), 8);
tcg_gen_mov_i32(REG(1), t2);
tcg_gen_qemu_st32(t1, REG(1), ctx->memidx);
/* Push the current frame pointer. */
tcg_gen_subi_i32(t2, REG(1), 4);
tcg_gen_mov_i32(REG(1), t2);
tcg_gen_qemu_st32(REG(0), REG(1), ctx->memidx);
/* Set the pc and $fp. */
tcg_gen_mov_i32(REG(0), REG(1));
gen_goto_tb(env, ctx, 0, cpu_ldl_code(env, ctx->pc+2));
tcg_temp_free_i32(t1);
tcg_temp_free_i32(t2);
ctx->bstate = BS_BRANCH;
length = 6;
}
break;
case 0x04: /* ret */
{
TCGv t1 = tcg_temp_new_i32();
/* The new $sp is the old $fp. */
tcg_gen_mov_i32(REG(1), REG(0));
/* Pop the frame pointer. */
tcg_gen_qemu_ld32u(REG(0), REG(1), ctx->memidx);
tcg_gen_addi_i32(t1, REG(1), 4);
tcg_gen_mov_i32(REG(1), t1);
/* Pop the return address and skip over the static chain
slot. */
tcg_gen_qemu_ld32u(cpu_pc, REG(1), ctx->memidx);
tcg_gen_addi_i32(t1, REG(1), 8);
tcg_gen_mov_i32(REG(1), t1);
tcg_temp_free_i32(t1);
/* Jump... */
tcg_gen_exit_tb(NULL, 0);
ctx->bstate = BS_BRANCH;
}
break;
case 0x05: /* add.l */
{
int a = (opcode >> 4) & 0xf;
int b = opcode & 0xf;
tcg_gen_add_i32(REG(a), REG(a), REG(b));
}
break;
case 0x06: /* push */
{
int a = (opcode >> 4) & 0xf;
int b = opcode & 0xf;
TCGv t1 = tcg_temp_new_i32();
tcg_gen_subi_i32(t1, REG(a), 4);
tcg_gen_mov_i32(REG(a), t1);
tcg_gen_qemu_st32(REG(b), REG(a), ctx->memidx);
tcg_temp_free_i32(t1);
}
break;
case 0x07: /* pop */
{
int a = (opcode >> 4) & 0xf;
int b = opcode & 0xf;
TCGv t1 = tcg_temp_new_i32();
tcg_gen_qemu_ld32u(REG(b), REG(a), ctx->memidx);
tcg_gen_addi_i32(t1, REG(a), 4);
tcg_gen_mov_i32(REG(a), t1);
tcg_temp_free_i32(t1);
}
break;
case 0x08: /* lda.l */
{
int reg = (opcode >> 4) & 0xf;
TCGv ptr = tcg_temp_new_i32();
tcg_gen_movi_i32(ptr, cpu_ldl_code(env, ctx->pc+2));
tcg_gen_qemu_ld32u(REG(reg), ptr, ctx->memidx);
tcg_temp_free_i32(ptr);
length = 6;
}
break;
case 0x09: /* sta.l */
{
int val = (opcode >> 4) & 0xf;
TCGv ptr = tcg_temp_new_i32();
tcg_gen_movi_i32(ptr, cpu_ldl_code(env, ctx->pc+2));
tcg_gen_qemu_st32(REG(val), ptr, ctx->memidx);
tcg_temp_free_i32(ptr);
length = 6;
}
break;
case 0x0a: /* ld.l (register indirect) */
{
int src = opcode & 0xf;
int dest = (opcode >> 4) & 0xf;
tcg_gen_qemu_ld32u(REG(dest), REG(src), ctx->memidx);
}
break;
case 0x0b: /* st.l */
{
int dest = (opcode >> 4) & 0xf;
int val = opcode & 0xf;
tcg_gen_qemu_st32(REG(val), REG(dest), ctx->memidx);
}
break;
case 0x0c: /* ldo.l */
{
int a = (opcode >> 4) & 0xf;
int b = opcode & 0xf;
TCGv t1 = tcg_temp_new_i32();
TCGv t2 = tcg_temp_new_i32();
tcg_gen_addi_i32(t1, REG(b), cpu_ldl_code(env, ctx->pc+2));
tcg_gen_qemu_ld32u(t2, t1, ctx->memidx);
tcg_gen_mov_i32(REG(a), t2);
tcg_temp_free_i32(t1);
tcg_temp_free_i32(t2);
length = 6;
}
break;
case 0x0d: /* sto.l */
{
int a = (opcode >> 4) & 0xf;
int b = opcode & 0xf;
TCGv t1 = tcg_temp_new_i32();
TCGv t2 = tcg_temp_new_i32();
tcg_gen_addi_i32(t1, REG(a), cpu_ldl_code(env, ctx->pc+2));
tcg_gen_qemu_st32(REG(b), t1, ctx->memidx);
tcg_temp_free_i32(t1);
tcg_temp_free_i32(t2);
length = 6;
}
break;
case 0x0e: /* cmp */
{
int a = (opcode >> 4) & 0xf;
int b = opcode & 0xf;
tcg_gen_mov_i32(cc_a, REG(a));
tcg_gen_mov_i32(cc_b, REG(b));
}
break;
case 0x19: /* jsr */
{
int fnreg = (opcode >> 4) & 0xf;
/* Load the stack pointer into T0. */
TCGv t1 = tcg_temp_new_i32();
TCGv t2 = tcg_temp_new_i32();
tcg_gen_movi_i32(t1, ctx->pc+2);
/* Make space for the static chain and return address. */
tcg_gen_subi_i32(t2, REG(1), 8);
tcg_gen_mov_i32(REG(1), t2);
tcg_gen_qemu_st32(t1, REG(1), ctx->memidx);
/* Push the current frame pointer. */
tcg_gen_subi_i32(t2, REG(1), 4);
tcg_gen_mov_i32(REG(1), t2);
tcg_gen_qemu_st32(REG(0), REG(1), ctx->memidx);
/* Set the pc and $fp. */
tcg_gen_mov_i32(REG(0), REG(1));
tcg_gen_mov_i32(cpu_pc, REG(fnreg));
tcg_temp_free_i32(t1);
tcg_temp_free_i32(t2);
tcg_gen_exit_tb(NULL, 0);
ctx->bstate = BS_BRANCH;
}
break;
case 0x1a: /* jmpa */
{
tcg_gen_movi_i32(cpu_pc, cpu_ldl_code(env, ctx->pc+2));
tcg_gen_exit_tb(NULL, 0);
ctx->bstate = BS_BRANCH;
length = 6;
}
break;
case 0x1b: /* ldi.b (immediate) */
{
int reg = (opcode >> 4) & 0xf;
int val = cpu_ldl_code(env, ctx->pc+2);
tcg_gen_movi_i32(REG(reg), val);
length = 6;
}
break;
case 0x1c: /* ld.b (register indirect) */
{
int src = opcode & 0xf;
int dest = (opcode >> 4) & 0xf;
tcg_gen_qemu_ld8u(REG(dest), REG(src), ctx->memidx);
}
break;
case 0x1d: /* lda.b */
{
int reg = (opcode >> 4) & 0xf;
TCGv ptr = tcg_temp_new_i32();
tcg_gen_movi_i32(ptr, cpu_ldl_code(env, ctx->pc+2));
tcg_gen_qemu_ld8u(REG(reg), ptr, ctx->memidx);
tcg_temp_free_i32(ptr);
length = 6;
}
break;
case 0x1e: /* st.b */
{
int dest = (opcode >> 4) & 0xf;
int val = opcode & 0xf;
tcg_gen_qemu_st8(REG(val), REG(dest), ctx->memidx);
}
break;
case 0x1f: /* sta.b */
{
int val = (opcode >> 4) & 0xf;
TCGv ptr = tcg_temp_new_i32();
tcg_gen_movi_i32(ptr, cpu_ldl_code(env, ctx->pc+2));
tcg_gen_qemu_st8(REG(val), ptr, ctx->memidx);
tcg_temp_free_i32(ptr);
length = 6;
}
break;
case 0x20: /* ldi.s (immediate) */
{
int reg = (opcode >> 4) & 0xf;
int val = cpu_ldl_code(env, ctx->pc+2);
tcg_gen_movi_i32(REG(reg), val);
length = 6;
}
break;
case 0x21: /* ld.s (register indirect) */
{
int src = opcode & 0xf;
int dest = (opcode >> 4) & 0xf;
tcg_gen_qemu_ld16u(REG(dest), REG(src), ctx->memidx);
}
break;
case 0x22: /* lda.s */
{
int reg = (opcode >> 4) & 0xf;
TCGv ptr = tcg_temp_new_i32();
tcg_gen_movi_i32(ptr, cpu_ldl_code(env, ctx->pc+2));
tcg_gen_qemu_ld16u(REG(reg), ptr, ctx->memidx);
tcg_temp_free_i32(ptr);
length = 6;
}
break;
case 0x23: /* st.s */
{
int dest = (opcode >> 4) & 0xf;
int val = opcode & 0xf;
tcg_gen_qemu_st16(REG(val), REG(dest), ctx->memidx);
}
break;
case 0x24: /* sta.s */
{
int val = (opcode >> 4) & 0xf;
TCGv ptr = tcg_temp_new_i32();
tcg_gen_movi_i32(ptr, cpu_ldl_code(env, ctx->pc+2));
tcg_gen_qemu_st16(REG(val), ptr, ctx->memidx);
tcg_temp_free_i32(ptr);
length = 6;
}
break;
case 0x25: /* jmp */
{
int reg = (opcode >> 4) & 0xf;
tcg_gen_mov_i32(cpu_pc, REG(reg));
tcg_gen_exit_tb(NULL, 0);
ctx->bstate = BS_BRANCH;
}
break;
case 0x26: /* and */
{
int a = (opcode >> 4) & 0xf;
int b = opcode & 0xf;
tcg_gen_and_i32(REG(a), REG(a), REG(b));
}
break;
case 0x27: /* lshr */
{
int a = (opcode >> 4) & 0xf;
int b = opcode & 0xf;
TCGv sv = tcg_temp_new_i32();
tcg_gen_andi_i32(sv, REG(b), 0x1f);
tcg_gen_shr_i32(REG(a), REG(a), sv);
tcg_temp_free_i32(sv);
}
break;
case 0x28: /* ashl */
{
int a = (opcode >> 4) & 0xf;
int b = opcode & 0xf;
TCGv sv = tcg_temp_new_i32();
tcg_gen_andi_i32(sv, REG(b), 0x1f);
tcg_gen_shl_i32(REG(a), REG(a), sv);
tcg_temp_free_i32(sv);
}
break;
case 0x29: /* sub.l */
{
int a = (opcode >> 4) & 0xf;
int b = opcode & 0xf;
tcg_gen_sub_i32(REG(a), REG(a), REG(b));
}
break;
case 0x2a: /* neg */
{
int a = (opcode >> 4) & 0xf;
int b = opcode & 0xf;
tcg_gen_neg_i32(REG(a), REG(b));
}
break;
case 0x2b: /* or */
{
int a = (opcode >> 4) & 0xf;
int b = opcode & 0xf;
tcg_gen_or_i32(REG(a), REG(a), REG(b));
}
break;
case 0x2c: /* not */
{
int a = (opcode >> 4) & 0xf;
int b = opcode & 0xf;
tcg_gen_not_i32(REG(a), REG(b));
}
break;
case 0x2d: /* ashr */
{
int a = (opcode >> 4) & 0xf;
int b = opcode & 0xf;
TCGv sv = tcg_temp_new_i32();
tcg_gen_andi_i32(sv, REG(b), 0x1f);
tcg_gen_sar_i32(REG(a), REG(a), sv);
tcg_temp_free_i32(sv);
}
break;
case 0x2e: /* xor */
{
int a = (opcode >> 4) & 0xf;
int b = opcode & 0xf;
tcg_gen_xor_i32(REG(a), REG(a), REG(b));
}
break;
case 0x2f: /* mul.l */
{
int a = (opcode >> 4) & 0xf;
int b = opcode & 0xf;
tcg_gen_mul_i32(REG(a), REG(a), REG(b));
}
break;
case 0x30: /* swi */
{
int val = cpu_ldl_code(env, ctx->pc+2);
TCGv temp = tcg_temp_new_i32();
tcg_gen_movi_i32(temp, val);
tcg_gen_st_i32(temp, cpu_env,
offsetof(CPUMoxieState, sregs[3]));
tcg_gen_movi_i32(cpu_pc, ctx->pc);
tcg_gen_movi_i32(temp, MOXIE_EX_SWI);
gen_helper_raise_exception(cpu_env, temp);
tcg_temp_free_i32(temp);
length = 6;
}
break;
case 0x31: /* div.l */
{
int a = (opcode >> 4) & 0xf;
int b = opcode & 0xf;
tcg_gen_movi_i32(cpu_pc, ctx->pc);
gen_helper_div(REG(a), cpu_env, REG(a), REG(b));
}
break;
case 0x32: /* udiv.l */
{
int a = (opcode >> 4) & 0xf;
int b = opcode & 0xf;
tcg_gen_movi_i32(cpu_pc, ctx->pc);
gen_helper_udiv(REG(a), cpu_env, REG(a), REG(b));
}
break;
case 0x33: /* mod.l */
{
int a = (opcode >> 4) & 0xf;
int b = opcode & 0xf;
tcg_gen_rem_i32(REG(a), REG(a), REG(b));
}
break;
case 0x34: /* umod.l */
{
int a = (opcode >> 4) & 0xf;
int b = opcode & 0xf;
tcg_gen_remu_i32(REG(a), REG(a), REG(b));
}
break;
case 0x35: /* brk */
{
TCGv temp = tcg_temp_new_i32();
tcg_gen_movi_i32(cpu_pc, ctx->pc);
tcg_gen_movi_i32(temp, MOXIE_EX_BREAK);
gen_helper_raise_exception(cpu_env, temp);
tcg_temp_free_i32(temp);
}
break;
case 0x36: /* ldo.b */
{
int a = (opcode >> 4) & 0xf;
int b = opcode & 0xf;
TCGv t1 = tcg_temp_new_i32();
TCGv t2 = tcg_temp_new_i32();
tcg_gen_addi_i32(t1, REG(b), cpu_ldl_code(env, ctx->pc+2));
tcg_gen_qemu_ld8u(t2, t1, ctx->memidx);
tcg_gen_mov_i32(REG(a), t2);
tcg_temp_free_i32(t1);
tcg_temp_free_i32(t2);
length = 6;
}
break;
case 0x37: /* sto.b */
{
int a = (opcode >> 4) & 0xf;
int b = opcode & 0xf;
TCGv t1 = tcg_temp_new_i32();
TCGv t2 = tcg_temp_new_i32();
tcg_gen_addi_i32(t1, REG(a), cpu_ldl_code(env, ctx->pc+2));
tcg_gen_qemu_st8(REG(b), t1, ctx->memidx);
tcg_temp_free_i32(t1);
tcg_temp_free_i32(t2);
length = 6;
}
break;
case 0x38: /* ldo.s */
{
int a = (opcode >> 4) & 0xf;
int b = opcode & 0xf;
TCGv t1 = tcg_temp_new_i32();
TCGv t2 = tcg_temp_new_i32();
tcg_gen_addi_i32(t1, REG(b), cpu_ldl_code(env, ctx->pc+2));
tcg_gen_qemu_ld16u(t2, t1, ctx->memidx);
tcg_gen_mov_i32(REG(a), t2);
tcg_temp_free_i32(t1);
tcg_temp_free_i32(t2);
length = 6;
}
break;
case 0x39: /* sto.s */
{
int a = (opcode >> 4) & 0xf;
int b = opcode & 0xf;
TCGv t1 = tcg_temp_new_i32();
TCGv t2 = tcg_temp_new_i32();
tcg_gen_addi_i32(t1, REG(a), cpu_ldl_code(env, ctx->pc+2));
tcg_gen_qemu_st16(REG(b), t1, ctx->memidx);
tcg_temp_free_i32(t1);
tcg_temp_free_i32(t2);
length = 6;
}
break;
default:
{
TCGv temp = tcg_temp_new_i32();
tcg_gen_movi_i32(cpu_pc, ctx->pc);
tcg_gen_movi_i32(temp, MOXIE_EX_BAD);
gen_helper_raise_exception(cpu_env, temp);
tcg_temp_free_i32(temp);
}
break;
}
}
return length;
}
/* generate intermediate code for basic block 'tb'. */
void gen_intermediate_code(CPUState *cs, struct TranslationBlock *tb)
{
CPUMoxieState *env = cs->env_ptr;
MoxieCPU *cpu = moxie_env_get_cpu(env);
DisasContext ctx;
target_ulong pc_start;
int num_insns, max_insns;
pc_start = tb->pc;
ctx.pc = pc_start;
ctx.saved_pc = -1;
ctx.tb = tb;
ctx.memidx = 0;
ctx.singlestep_enabled = 0;
ctx.bstate = BS_NONE;
num_insns = 0;
max_insns = tb_cflags(tb) & CF_COUNT_MASK;
if (max_insns == 0) {
max_insns = CF_COUNT_MASK;
}
if (max_insns > TCG_MAX_INSNS) {
max_insns = TCG_MAX_INSNS;
}
gen_tb_start(tb);
do {
tcg_gen_insn_start(ctx.pc);
num_insns++;
if (unlikely(cpu_breakpoint_test(cs, ctx.pc, BP_ANY))) {
tcg_gen_movi_i32(cpu_pc, ctx.pc);
gen_helper_debug(cpu_env);
ctx.bstate = BS_EXCP;
/* The address covered by the breakpoint must be included in
[tb->pc, tb->pc + tb->size) in order to for it to be
properly cleared -- thus we increment the PC here so that
the logic setting tb->size below does the right thing. */
ctx.pc += 2;
goto done_generating;
}
ctx.opcode = cpu_lduw_code(env, ctx.pc);
ctx.pc += decode_opc(cpu, &ctx);
if (num_insns >= max_insns) {
break;
}
if (cs->singlestep_enabled) {
break;
}
if ((ctx.pc & (TARGET_PAGE_SIZE - 1)) == 0) {
break;
}
} while (ctx.bstate == BS_NONE && !tcg_op_buf_full());
if (cs->singlestep_enabled) {
tcg_gen_movi_tl(cpu_pc, ctx.pc);
gen_helper_debug(cpu_env);
} else {
switch (ctx.bstate) {
case BS_STOP:
case BS_NONE:
gen_goto_tb(env, &ctx, 0, ctx.pc);
break;
case BS_EXCP:
tcg_gen_exit_tb(NULL, 0);
break;
case BS_BRANCH:
default:
break;
}
}
done_generating:
gen_tb_end(tb, num_insns);
tb->size = ctx.pc - pc_start;
tb->icount = num_insns;
}
void restore_state_to_opc(CPUMoxieState *env, TranslationBlock *tb,
target_ulong *data)
{
env->pc = data[0];
}
Reference in New Issue View Git Blame Copy Permalink