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cris: Centralize fetching

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Signed-off-by: Edgar E. Iglesias <edgar.iglesias@gmail.com>
This commit is contained in:
Edgar E. Iglesias 2010-06-16 11:49:30 +02:00
parent a699a7be90
commit 7de141cb82
1 changed files with 44 additions and 22 deletions
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66
target-cris/translate.c
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@ -227,6 +227,42 @@ static inline void t_gen_mov_preg_TN(DisasContext *dc, int r, TCGv tn)
}
}
static int cris_fetch(DisasContext *dc, uint32_t addr,
unsigned int size, unsigned int sign)
{
int r;
switch (size) {
case 4:
{
r = ldl_code(addr);
break;
}
case 2:
{
if (sign) {
r = ldsw_code(addr);
} else {
r = lduw_code(addr);
}
break;
}
case 1:
{
if (sign) {
r = ldsb_code(addr);
} else {
r = ldub_code(addr);
}
break;
}
default:
cpu_abort(dc->env, "Invalid fetch size %d\n", size);
break;
}
return r;
}
static void cris_lock_irq(DisasContext *dc)
{
dc->clear_locked_irq = 0;
@ -1306,21 +1342,7 @@ static int dec_prep_move_m(DisasContext *dc, int s_ext, int memsize,
if (memsize == 1)
insn_len++;
if (memsize != 4) {
if (s_ext) {
if (memsize == 1)
imm = ldsb_code(dc->pc + 2);
else
imm = ldsw_code(dc->pc + 2);
} else {
if (memsize == 1)
imm = ldub_code(dc->pc + 2);
else
imm = lduw_code(dc->pc + 2);
}
} else
imm = ldl_code(dc->pc + 2);
imm = cris_fetch(dc, dc->pc + 2, memsize, s_ext);
tcg_gen_movi_tl(dst, imm);
dc->postinc = 0;
} else {
@ -2758,7 +2780,7 @@ static int dec_lapc_im(DisasContext *dc)
rd = dc->op2;
cris_cc_mask(dc, 0);
imm = ldl_code(dc->pc + 2);
imm = cris_fetch(dc, dc->pc + 2, 4, 0);
LOG_DIS("lapc 0x%x, $r%u\n", imm + dc->pc, dc->op2);
pc = dc->pc;
@ -2801,7 +2823,7 @@ static int dec_jas_im(DisasContext *dc)
{
uint32_t imm;
imm = ldl_code(dc->pc + 2);
imm = cris_fetch(dc, dc->pc + 2, 4, 0);
LOG_DIS("jas 0x%x\n", imm);
cris_cc_mask(dc, 0);
@ -2817,7 +2839,7 @@ static int dec_jasc_im(DisasContext *dc)
{
uint32_t imm;
imm = ldl_code(dc->pc + 2);
imm = cris_fetch(dc, dc->pc + 2, 4, 0);
LOG_DIS("jasc 0x%x\n", imm);
cris_cc_mask(dc, 0);
@ -2845,7 +2867,7 @@ static int dec_bcc_im(DisasContext *dc)
int32_t offset;
uint32_t cond = dc->op2;
offset = ldsw_code(dc->pc + 2);
offset = cris_fetch(dc, dc->pc + 2, 2, 1);
LOG_DIS("b%s %d pc=%x dst=%x\n",
cc_name(cond), offset,
@ -2862,7 +2884,7 @@ static int dec_bas_im(DisasContext *dc)
int32_t simm;
simm = ldl_code(dc->pc + 2);
simm = cris_fetch(dc, dc->pc + 2, 4, 0);
LOG_DIS("bas 0x%x, $p%u\n", dc->pc + simm, dc->op2);
cris_cc_mask(dc, 0);
@ -2877,7 +2899,7 @@ static int dec_bas_im(DisasContext *dc)
static int dec_basc_im(DisasContext *dc)
{
int32_t simm;
simm = ldl_code(dc->pc + 2);
simm = cris_fetch(dc, dc->pc + 2, 4, 0);
LOG_DIS("basc 0x%x, $p%u\n", dc->pc + simm, dc->op2);
cris_cc_mask(dc, 0);
@ -3075,7 +3097,7 @@ static unsigned int crisv32_decoder(DisasContext *dc)
tcg_gen_debug_insn_start(dc->pc);
/* Load a halfword onto the instruction register. */
dc->ir = lduw_code(dc->pc);
dc->ir = cris_fetch(dc, dc->pc, 2, 0);
/* Now decode it. */
dc->opcode = EXTRACT_FIELD(dc->ir, 4, 11);