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| author | Richard Henderson <rth@twiddle.net> | 2010-04-09 10:49:10 -0700 |
|---|---|---|
| committer | Aurelien Jarno <aurelien@aurel32.net> | 2010-04-26 20:06:17 +0200 |
| commit | 739734cb5cf90c3e692d41b51fa095240b49ddd7 (patch) | |
| tree | d56d92d06ff3cc39483a915c459fd6d4bbae3a32 /tcg | |
| parent | f061b40e91b96d32e535cc81362904c685483506 (diff) | |
| download | qemu-739734cb5cf90c3e692d41b51fa095240b49ddd7.zip qemu-739734cb5cf90c3e692d41b51fa095240b49ddd7.tar.gz qemu-739734cb5cf90c3e692d41b51fa095240b49ddd7.tar.bz2 | |
tcg-hppa: Schedule the address masking after the TLB load.
Issue the tlb load as early as possible and perform the address
masking while the load is completing.
Signed-off-by: Richard Henderson <rth@twiddle.net>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
Diffstat (limited to 'tcg')
| -rw-r--r-- | tcg/hppa/tcg-target.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/tcg/hppa/tcg-target.c b/tcg/hppa/tcg-target.c index 2f3b770..6941e22 100644 --- a/tcg/hppa/tcg-target.c +++ b/tcg/hppa/tcg-target.c @@ -904,7 +904,6 @@ static int tcg_out_tlb_read(TCGContext *s, int r0, int r1, int addrlo, CPU_TLB_ENTRY_BITS is > 3, so we can't merge that shift with the add that follows. */ tcg_out_extr(s, r1, addrlo, TARGET_PAGE_BITS, CPU_TLB_BITS, 0); - tcg_out_andi(s, r0, addrlo, TARGET_PAGE_MASK | ((1 << s_bits) - 1)); tcg_out_shli(s, r1, r1, CPU_TLB_ENTRY_BITS); tcg_out_arith(s, r1, r1, TCG_AREG0, INSN_ADDL); @@ -927,6 +926,12 @@ static int tcg_out_tlb_read(TCGContext *s, int r0, int r1, int addrlo, tcg_out_ld(s, TCG_TYPE_PTR, TCG_REG_R20, r1, offset); } + /* Compute the value that ought to appear in the TLB for a hit, namely, the page + of the address. We include the low N bits of the address to catch unaligned + accesses and force them onto the slow path. Do this computation after having + issued the load from the TLB slot to give the load time to complete. */ + tcg_out_andi(s, r0, addrlo, TARGET_PAGE_MASK | ((1 << s_bits) - 1)); + /* If not equal, jump to lab_miss. */ if (TARGET_LONG_BITS == 64) { tcg_out_brcond2(s, TCG_COND_NE, TCG_REG_R20, TCG_REG_R23, |