tcg-ia64: Optimize small arguments to exit_tb
Saves one bundle for the common case of exit_tb 0. Signed-off-by: Richard Henderson <rth@twiddle.net>
This commit is contained in:
parent
c6138aabfb
commit
dcf91778ca
|
@ -950,15 +950,21 @@ static inline void tcg_out_callr(TCGContext *s, TCGReg addr)
|
||||||
static void tcg_out_exit_tb(TCGContext *s, tcg_target_long arg)
|
static void tcg_out_exit_tb(TCGContext *s, tcg_target_long arg)
|
||||||
{
|
{
|
||||||
int64_t disp;
|
int64_t disp;
|
||||||
uint64_t imm;
|
uint64_t imm, opc1;
|
||||||
|
|
||||||
tcg_out_movi(s, TCG_TYPE_PTR, TCG_REG_R8, arg);
|
/* At least arg == 0 is a common operation. */
|
||||||
|
if (arg == sextract64(arg, 0, 22)) {
|
||||||
|
opc1 = tcg_opc_movi_a(TCG_REG_P0, TCG_REG_R8, arg);
|
||||||
|
} else {
|
||||||
|
tcg_out_movi(s, TCG_TYPE_PTR, TCG_REG_R8, arg);
|
||||||
|
opc1 = INSN_NOP_M;
|
||||||
|
}
|
||||||
|
|
||||||
disp = tb_ret_addr - s->code_ptr;
|
disp = tb_ret_addr - s->code_ptr;
|
||||||
imm = (uint64_t)disp >> 4;
|
imm = (uint64_t)disp >> 4;
|
||||||
|
|
||||||
tcg_out_bundle(s, mLX,
|
tcg_out_bundle(s, mLX,
|
||||||
INSN_NOP_M,
|
opc1,
|
||||||
tcg_opc_l3 (imm),
|
tcg_opc_l3 (imm),
|
||||||
tcg_opc_x3 (TCG_REG_P0, OPC_BRL_SPTK_MANY_X3, imm));
|
tcg_opc_x3 (TCG_REG_P0, OPC_BRL_SPTK_MANY_X3, imm));
|
||||||
}
|
}
|
||||||
|
|
Loading…
Reference in a new issue