diff options
| -rw-r--r-- | tcg/aarch64/tcg-target.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/tcg/aarch64/tcg-target.c b/tcg/aarch64/tcg-target.c index c1d989571f..a08f6c782b 100644 --- a/tcg/aarch64/tcg-target.c +++ b/tcg/aarch64/tcg-target.c @@ -578,6 +578,16 @@ static void tcg_out_movi(TCGContext *s, TCGType type, TCGReg rd, type = TCG_TYPE_I32; } + /* Speed things up by handling the common case of small positive + and negative values specially. */ + if ((value & ~0xffffull) == 0) { + tcg_out_insn(s, 3405, MOVZ, type, rd, value, 0); + return; + } else if ((ivalue & ~0xffffull) == 0) { + tcg_out_insn(s, 3405, MOVN, type, rd, ivalue, 0); + return; + } + /* Check for bitfield immediates. For the benefit of 32-bit quantities, use the sign-extended value. That lets us match rotated values such as 0xff0000ff with the same 64-bit logic matching 0xffffffffff0000ff. */ |