Commit 95ede84f authored by Richard Henderson's avatar Richard Henderson
Browse files

tcg/arm: Tighten tlb indexing offset test 



We are not going to use ldrd for loading the comparator
for 32-bit guests, so don't limit cmp_off to 8 bits then.
This eliminates one insn in the tlb load for some guests.

Signed-off-by: default avatarRichard Henderson <rth@twiddle.net>
parent 647ab96a

tcg/arm/tcg-target.inc.c

+3 −1
Original line number Diff line number Diff line
@@ -1202,7 +1202,9 @@ static TCGReg tcg_out_tlb_read(TCGContext *s, TCGReg addrlo, TCGReg addrhi, 
    }



    /* We checked that the offset is contained within 16 bits above.  */

    if (add_off > 0xfff || (use_armv6_instructions && cmp_off > 0xff)) {

    if (add_off > 0xfff

        || (use_armv6_instructions && TARGET_LONG_BITS == 64

            && cmp_off > 0xff)) {

        tcg_out_dat_imm(s, COND_AL, ARITH_ADD, TCG_REG_R2, base,

                        (24 << 7) | (cmp_off >> 8));

        base = TCG_REG_R2;