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tcg: Dynamically allocate TCGOps

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With no fixed array allocation, we can't overflow a buffer.
This will be important as optimizations related to host vectors
may expand the number of ops used.

Use QTAILQ to link the ops together.

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
This commit is contained in:
Richard Henderson 2017-11-02 15:19:14 +01:00
parent f764718d0c
commit 15fa08f845
12 changed files with 78 additions and 158 deletions
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2
target/arm/translate-a64.c
View file

@ -11290,8 +11290,8 @@ static void aarch64_tr_insn_start(DisasContextBase *dcbase, CPUState *cpu)
{
DisasContext *dc = container_of(dcbase, DisasContext, base);
dc->insn_start_idx = tcg_op_buf_count();
tcg_gen_insn_start(dc->pc, 0, 0);
dc->insn_start = tcg_last_op();
}
static bool aarch64_tr_breakpoint_check(DisasContextBase *dcbase, CPUState *cpu,

2
target/arm/translate.c
View file

@ -12096,10 +12096,10 @@ static void arm_tr_insn_start(DisasContextBase *dcbase, CPUState *cpu)
{
DisasContext *dc = container_of(dcbase, DisasContext, base);
dc->insn_start_idx = tcg_op_buf_count();
tcg_gen_insn_start(dc->pc,
(dc->condexec_cond << 4) | (dc->condexec_mask >> 1),
0);
dc->insn_start = tcg_last_op();
}
static bool arm_tr_breakpoint_check(DisasContextBase *dcbase, CPUState *cpu,

10
target/arm/translate.h
View file

@ -66,8 +66,8 @@ typedef struct DisasContext {
bool ss_same_el;
/* Bottom two bits of XScale c15_cpar coprocessor access control reg */
int c15_cpar;
/* TCG op index of the current insn_start. */
int insn_start_idx;
/* TCG op of the current insn_start. */
TCGOp *insn_start;
#define TMP_A64_MAX 16
int tmp_a64_count;
TCGv_i64 tmp_a64[TMP_A64_MAX];
@ -117,9 +117,9 @@ static void disas_set_insn_syndrome(DisasContext *s, uint32_t syn)
syn >>= ARM_INSN_START_WORD2_SHIFT;
/* We check and clear insn_start_idx to catch multiple updates. */
assert(s->insn_start_idx != 0);
tcg_set_insn_param(s->insn_start_idx, 2, syn);
s->insn_start_idx = 0;
assert(s->insn_start != NULL);
tcg_set_insn_param(s->insn_start, 2, syn);
s->insn_start = NULL;
}
/* is_jmp field values */