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target/xtensa: extract test for alloca exception 

- mark movsp instruction;
- put test for alloca exception right after the test for window
  underflow;

Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
This commit is contained in:
Max Filippov 2018-08-30 18:21:22 -07:00
parent f473019a97
commit 90d6494d13
1 changed files with 8 additions and 3 deletions
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11
target/xtensa/translate.c
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@ -1078,6 +1078,13 @@ static void disas_xtensa_insn(CPUXtensaState *env, DisasContext *dc)
tcg_temp_free(tmp); tcg_temp_free(tmp);
} }
if (op_flags & XTENSA_OP_ALLOCA) {
TCGv_i32 tmp = tcg_const_i32(dc->pc);
gen_helper_movsp(cpu_env, tmp);
tcg_temp_free(tmp);
}
for (slot = 0; slot < slots; ++slot) { for (slot = 0; slot < slots; ++slot) {
XtensaOpcodeOps *ops = slot_prop[slot].ops; XtensaOpcodeOps *ops = slot_prop[slot].ops;
@ -1918,10 +1925,7 @@ static void translate_movp(DisasContext *dc, const uint32_t arg[],
static void translate_movsp(DisasContext *dc, const uint32_t arg[], static void translate_movsp(DisasContext *dc, const uint32_t arg[],
const uint32_t par[]) const uint32_t par[])
{ {
TCGv_i32 pc = tcg_const_i32(dc->pc);
gen_helper_movsp(cpu_env, pc);
tcg_gen_mov_i32(cpu_R[arg[0]], cpu_R[arg[1]]); tcg_gen_mov_i32(cpu_R[arg[0]], cpu_R[arg[1]]);
tcg_temp_free(pc);
} }
static void translate_mul16(DisasContext *dc, const uint32_t arg[], static void translate_mul16(DisasContext *dc, const uint32_t arg[],
@ -3062,6 +3066,7 @@ static const XtensaOpcodeOps core_ops[] = {
.name = "movsp", .name = "movsp",
.translate = translate_movsp, .translate = translate_movsp,
.windowed_register_op = 0x3, .windowed_register_op = 0x3,
.op_flags = XTENSA_OP_ALLOCA,
}, { }, {
.name = "movt", .name = "movt",
.translate = translate_movp, .translate = translate_movp,