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cris: Allow more TB chaining for crisv10 

Signed-off-by: Edgar E. Iglesias <edgar@axis.com>
This commit is contained in:
Edgar E. Iglesias 2011-01-10 23:24:36 +01:00
parent b09cd072df
commit 5cabc5ccfe
2 changed files with 33 additions and 14 deletions
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37
target-cris/translate.c
View File

@ -120,9 +120,10 @@ typedef struct DisasContext {
unsigned int tb_flags; /* tb dependent flags. */
int is_jmp;
#define JMP_NOJMP 0
#define JMP_DIRECT 1
#define JMP_INDIRECT 2
#define JMP_NOJMP 0
#define JMP_DIRECT 1
#define JMP_DIRECT_CC 2
#define JMP_INDIRECT 3
int jmp; /* 0=nojmp, 1=direct, 2=indirect. */
uint32_t jmp_pc;
@ -1127,7 +1128,7 @@ static void gen_tst_cc (DisasContext *dc, TCGv cc, int cond)
static void cris_store_direct_jmp(DisasContext *dc)
{
/* Store the direct jmp state into the cpu-state. */
if (dc->jmp == JMP_DIRECT) {
if (dc->jmp == JMP_DIRECT || dc->jmp == JMP_DIRECT_CC) {
tcg_gen_movi_tl(env_btarget, dc->jmp_pc);
dc->jmp = JMP_INDIRECT;
}
@ -1139,7 +1140,7 @@ static void cris_prepare_cc_branch (DisasContext *dc,
/* This helps us re-schedule the micro-code to insns in delay-slots
before the actual jump. */
dc->delayed_branch = 2;
dc->jmp = JMP_DIRECT;
dc->jmp = JMP_DIRECT_CC;
dc->jmp_pc = dc->pc + offset;
gen_tst_cc (dc, env_btaken, cond);
@ -1155,7 +1156,9 @@ static inline void cris_prepare_jmp (DisasContext *dc, unsigned int type)
before the actual jump. */
dc->delayed_branch = 2;
dc->jmp = type;
tcg_gen_movi_tl(env_btaken, 1);
if (type == JMP_INDIRECT) {
tcg_gen_movi_tl(env_btaken, 1);
}
}
static void gen_load64(DisasContext *dc, TCGv_i64 dst, TCGv addr)
@ -3193,10 +3196,13 @@ gen_intermediate_code_internal(CPUState *env, TranslationBlock *tb,
qemu_log_try_set_file(stderr);
if (env->pregs[PR_VR] == 32)
if (env->pregs[PR_VR] == 32) {
dc->decoder = crisv32_decoder;
else
dc->clear_locked_irq = 0;
} else {
dc->decoder = crisv10_decoder;
dc->clear_locked_irq = 1;
}
/* Odd PC indicates that branch is rexecuting due to exception in the
* delayslot, like in real hw.
@ -3218,7 +3224,6 @@ gen_intermediate_code_internal(CPUState *env, TranslationBlock *tb,
dc->cc_mask = 0;
dc->update_cc = 0;
dc->clear_prefix = 0;
dc->clear_locked_irq = 1;
cris_update_cc_op(dc, CC_OP_FLAGS, 4);
dc->cc_size_uptodate = -1;
@ -3312,7 +3317,14 @@ gen_intermediate_code_internal(CPUState *env, TranslationBlock *tb,
|| (dc->flags_x != (tb->flags & X_FLAG))) {
cris_store_direct_jmp(dc);
}
if (dc->jmp == JMP_DIRECT) {
if (dc->clear_locked_irq) {
dc->clear_locked_irq = 0;
t_gen_mov_env_TN(locked_irq,
tcg_const_tl(0));
}
if (dc->jmp == JMP_DIRECT_CC) {
int l1;
l1 = gen_new_label();
@ -3326,6 +3338,11 @@ gen_intermediate_code_internal(CPUState *env, TranslationBlock *tb,
gen_goto_tb(dc, 0, dc->pc);
dc->is_jmp = DISAS_TB_JUMP;
dc->jmp = JMP_NOJMP;
} else if (dc->jmp == JMP_DIRECT) {
cris_evaluate_flags(dc);
gen_goto_tb(dc, 0, dc->jmp_pc);
dc->is_jmp = DISAS_TB_JUMP;
dc->jmp = JMP_NOJMP;
} else {
t_gen_cc_jmp(env_btarget,
tcg_const_tl(dc->pc));

10
target-cris/translate_v10.c
View File

@ -1060,15 +1060,15 @@ static unsigned int dec10_ind(DisasContext *dc)
break;
case CRISV10_IND_JUMP_M:
if (dc->src == 15) {
LOG_DIS("jump.%d %d r%d r%d\n", size,
LOG_DIS("jump.%d %d r%d r%d direct\n", size,
dc->opcode, dc->src, dc->dst);
imm = ldl_code(dc->pc + 2);
if (dc->mode == CRISV10_MODE_AUTOINC)
insn_len += size;
t_gen_mov_preg_TN(dc, dc->dst, tcg_const_tl(dc->pc + insn_len));
tcg_gen_movi_tl(env_btarget, imm);
cris_prepare_jmp(dc, JMP_INDIRECT);
dc->jmp_pc = imm;
cris_prepare_jmp(dc, JMP_DIRECT);
dc->delayed_branch--; /* v10 has no dslot here. */
} else {
if (dc->dst == 14) {
@ -1184,7 +1184,9 @@ static unsigned int crisv10_decoder(DisasContext *dc)
if (dc->clear_prefix && dc->tb_flags & PFIX_FLAG) {
dc->tb_flags &= ~PFIX_FLAG;
tcg_gen_andi_tl(cpu_PR[PR_CCS], cpu_PR[PR_CCS], ~PFIX_FLAG);
dc->cpustate_changed = 1;
if (dc->tb_flags != dc->tb->flags) {
dc->cpustate_changed = 1;
}
}
/* CRISv10 locks out interrupts on dslots. */