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2014-05-28tcg: Optimize brcond2 and setcond2 ne/eqRichard Henderson1-0/+94
If either the high or low pair can be resolved, we can simplify to either a constant or to a 32-bit comparison. Signed-off-by: Richard Henderson <rth@twiddle.net>
2014-05-27Merge remote-tracking branch 'remotes/rth/tcg-mips' into stagingPeter Maydell2-918/+945
* remotes/rth/tcg-mips: (24 commits) tcg-mips: Enable direct chaining of TBs tcg-mips: Simplify movcond tcg-mips: Simplify brcond2 tcg-mips: Improve setcond eq/ne vs zeros tcg-mips: Simplify setcond2 tcg-mips: Simplify brcond tcg-mips: Simplify setcond tcg-mips: Commonize opcode implementations tcg-mips: Improve add2/sub2 tcg-mips: Hoist args loads tcg-mips: Fix subtract immediate range tcg-mips: Name the opcode enumeration tcg-mips: Use EXT for AND on mips32r2 tcg-mips: Use T9 for TCG_TMP1 tcg-mips: Introduce TCG_TMP0, TCG_TMP1 tcg-mips: Rearrange register allocation tcg-mips: Convert to new_ldst tcg-mips: Convert to new qemu_l/st helpers tcg-mips: Move softmmu slow path out of line tcg-mips: Split large ldst offsets ... Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2014-05-24tcg-mips: Enable direct chaining of TBsRichard Henderson1-1/+10
Now that the code_gen_buffer is constrained to not cross 256mb regions, we are assured that we can use J to reach another TB. Reviewed-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Richard Henderson <rth@twiddle.net>
2014-05-24tcg-mips: Simplify movcondRichard Henderson1-49/+17
Use the same table to fold comparisons as with setcond. Reviewed-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Richard Henderson <rth@twiddle.net>
2014-05-24tcg-mips: Simplify brcond2Richard Henderson1-57/+20
Emitting a single branch instead of (up to) 3, using setcond2 to generate the composite compare. Reviewed-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Richard Henderson <rth@twiddle.net>
2014-05-24tcg-mips: Improve setcond eq/ne vs zerosRichard Henderson1-4/+36
The original code results in one too many insns per zero present in the input. And since comparing 64-bit numbers vs zero is common... Reviewed-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Richard Henderson <rth@twiddle.net>
2014-05-24tcg-mips: Simplify setcond2Richard Henderson1-64/+31
Using tcg_unsigned_cond and tcg_high_cond. Also, move the function up in the file for future cleanups. Reviewed-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Richard Henderson <rth@twiddle.net>
2014-05-24tcg-mips: Simplify brcondRichard Henderson1-46/+41
Use the same table to fold comparisons as with setcond. Reviewed-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Richard Henderson <rth@twiddle.net>
2014-05-24tcg-mips: Simplify setcondRichard Henderson1-58/+67
Use a table to fold comparisons to less-than. Also, move the function up in the file for futher simplifications. Reviewed-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Richard Henderson <rth@twiddle.net>
2014-05-24tcg-mips: Commonize opcode implementationsRichard Henderson1-114/+98
Most opcodes fall in to one of a couple of patterns. Reviewed-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Richard Henderson <rth@twiddle.net>
2014-05-24tcg-mips: Improve add2/sub2Richard Henderson1-31/+56
Reduce insn count from 5 to either 3 or 4. Reviewed-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Richard Henderson <rth@twiddle.net>
2014-05-24tcg-mips: Hoist args loadsRichard Henderson1-98/+103
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Richard Henderson <rth@twiddle.net>
2014-05-24tcg-mips: Fix subtract immediate rangeRichard Henderson1-5/+11
Since we must use ADDUI, we would generate incorrect code for -32768. Leaving off subtract of +32768 makes things easier for a follow-on patch. Reviewed-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Richard Henderson <rth@twiddle.net>
2014-05-24tcg-mips: Name the opcode enumerationRichard Henderson1-9/+9
And use it in the opcode emission functions. Reviewed-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Richard Henderson <rth@twiddle.net>
2014-05-24tcg-mips: Use EXT for AND on mips32r2Richard Henderson2-14/+50
At the same time, tidy deposit by introducing tcg_out_opc_bf. Reviewed-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Richard Henderson <rth@twiddle.net>
2014-05-24tcg-mips: Use T9 for TCG_TMP1Richard Henderson1-1/+1
T0 is an argument register for the n32 and n64 abis. T9 is the call address register for the abis, and is more directly under the control of the backend. Reviewed-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Richard Henderson <rth@twiddle.net>
2014-05-24tcg-mips: Introduce TCG_TMP0, TCG_TMP1Richard Henderson1-114/+117
Use these instead of hard-coding the registers to use for temporaries. Reviewed-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Richard Henderson <rth@twiddle.net>
2014-05-24tcg-mips: Rearrange register allocationRichard Henderson2-11/+19
Use FP (also known as S8) as a normal call-saved register. Include T0 in the allocation order and call-clobbered list even though it's currently used as a TCG temporary. Put the argument registers at the end of the allocation order. Reviewed-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Richard Henderson <rth@twiddle.net>
2014-05-24tcg-mips: Convert to new_ldstRichard Henderson2-53/+25
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Richard Henderson <rth@twiddle.net>
2014-05-24tcg-mips: Convert to new qemu_l/st helpersRichard Henderson1-51/+56
In addition, fill delay slots calling the helpers and tail call to the store helpers. Reviewed-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Richard Henderson <rth@twiddle.net>
2014-05-24tcg-mips: Move softmmu slow path out of lineRichard Henderson1-389/+383
At the same time, tidy up the call helpers, avoiding a memory reference. Split out several subroutines. Use TCGMemOp constants. Make endianness selectable at runtime. Reviewed-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Richard Henderson <rth@twiddle.net>
2014-05-24tcg-mips: Split large ldst offsetsRichard Henderson1-11/+12
Use this to reduce goto_tb by one insn. Reviewed-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Richard Henderson <rth@twiddle.net>
2014-05-24tcg-mips: Fill the exit_tb delay slotRichard Henderson1-7/+18
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Richard Henderson <rth@twiddle.net>
2014-05-24tcg-mips: Use J and JAL opcodesRichard Henderson1-6/+40
For userland builds calls will normally be in range, and for the exit_tb opcode the branch to the epilogue. Reviewed-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Richard Henderson <rth@twiddle.net>
2014-05-22tci: Fix tcg_out_callRichard Henderson1-0/+3
Broken since dddbb2e1e3f8137d7e3f1faf9758c66cca0c94ea. Do all the rest of the things that tcg_out_op did before and after the big switch statement. Signed-off-by: Richard Henderson <rth@twiddle.net>
2014-05-15tcg-s390: Implement direct chaining of TBsRichard Henderson1-1/+3
Signed-off-by: Richard Henderson <rth@twiddle.net>
2014-05-15tcg-s390: Improve setcondRichard Henderson1-6/+91
There are a variety of common cases for which we can use carry tricks to avoid a conditional branch. On very new hardware, use LOAD ON CONDITION instead of a conditional branch. Signed-off-by: Richard Henderson <rth@twiddle.net>
2014-05-15tcg-s390: Allow immediate operands to add2 and sub2Richard Henderson1-12/+52
Signed-off-by: Richard Henderson <rth@twiddle.net>
2014-05-15tcg-s390: Implement tcg_register_jitRichard Henderson1-7/+55
Signed-off-by: Richard Henderson <rth@twiddle.net>
2014-05-15tcg-s390: Use more risbg in the tlb sequenceRichard Henderson1-21/+28
Elides two insns from the sequence. The resulting tlb compare sequence is satisfyingly minimal: risbg %r2,%r8,51,186,56 risbg %r3,%r8,61,178,0 cg %r3,904(%r10,%r2) lg %r2,920(%r10,%r2) jlh tlb_miss Signed-off-by: Richard Henderson <rth@twiddle.net>
2014-05-15tcg-s390: Move ldst helpers out of lineRichard Henderson1-92/+118
That is, the old LDST_OPTIMIZATION. Signed-off-by: Richard Henderson <rth@twiddle.net>
2014-05-15tcg-s390: Convert to new ldst opcodesRichard Henderson2-116/+56
Signed-off-by: Richard Henderson <rth@twiddle.net>
2014-05-15tcg-s390: Integrate endianness into TCGMemOpRichard Henderson1-64/+60
Signed-off-by: Richard Henderson <rth@twiddle.net>
2014-05-15tcg-s390: Convert to TCGMemOpRichard Henderson1-46/+36
Signed-off-by: Richard Henderson <rth@twiddle.net>
2014-05-15tcg-s390: Fix off-by-one in wraparound andiRichard Henderson1-2/+2
Signed-off-by: Richard Henderson <rth@twiddle.net>
2014-05-14tcg: Fix tcg_reg_alloc_mov vs no-op truncationRichard Henderson1-8/+11
Commit af3cbfbe8018ccc16fb3a0048e928f66f0d05e87 hoisted some "common" loads of the temporary type, forgetting that the types could differ during truncating moves. This affects the correctness of the memory offset on big-endian hosts. Tested-by: Tom Musta <tommusta@gmail.com> Signed-off-by: Richard Henderson <rth@twiddle.net>
2014-05-12tcg: Remove unreachable code in tcg_out_op and op_defsRichard Henderson11-245/+49
The INDEX_op_call case has just been obsoleted; the mov and movi cases have not been reachable for years. Attempt to document this both in each tcg_out_op switch, and via TCG_OPF_NOT_PRESENT. Because of the TCG_OPF_NOT_PRESENT change, this must be done for all targets in a single commit. Signed-off-by: Richard Henderson <rth@twiddle.net>
2014-05-12tcg: Use tcg_target_available_regs in tcg_reg_alloc_movRichard Henderson1-9/+10
The move opcodes are special in that their constraints must cover all available registers. So instead of checking the constraints, just use the available registers. Signed-off-by: Richard Henderson <rth@twiddle.net>
2014-05-12tcg: Make call address a constant parameterRichard Henderson5-152/+72
Avoid allocating a tcg temporary to hold the constant address, and instead place it directly into the op_call arguments. At the same time, convert to the newly introduced tcg_out_call backend function, rather than invoking tcg_out_op for the call. Signed-off-by: Richard Henderson <rth@twiddle.net>
2014-05-12tci: Create tcg_out_callRichard Henderson1-0/+5
Signed-off-by: Richard Henderson <rth@twiddle.net>
2014-05-12tcg-mips: Split out tcg_out_callRichard Henderson1-8/+10
Signed-off-by: Richard Henderson <rth@twiddle.net>
2014-05-12tcg-sparc: Create tcg_out_callRichard Henderson1-8/+14
Rename the existing tcg_out_calli to tcg_out_call_nodelay. Signed-off-by: Richard Henderson <rth@twiddle.net>
2014-05-12tcg-ppc64: Rename tcg_out_calli to tcg_out_callRichard Henderson1-21/+16
Merge the existing tcg_out_call into tcg_out_op. Signed-off-by: Richard Henderson <rth@twiddle.net>
2014-05-12tcg-ppc: Split out tcg_out_callRichard Henderson1-3/+8
Signed-off-by: Richard Henderson <rth@twiddle.net>
2014-05-12tcg-s390: Rename tgen_calli to tcg_out_callRichard Henderson1-4/+4
Signed-off-by: Richard Henderson <rth@twiddle.net>
2014-05-12tcg-i386: Rename tcg_out_calli to tcg_out_callRichard Henderson1-3/+3
Signed-off-by: Richard Henderson <rth@twiddle.net>
2014-05-12tcg: Require TCG_TARGET_INSN_UNIT_SIZERichard Henderson1-3/+2
Now that all backends do define TCG_TARGET_INSN_UNIT_SIZE, remove the fallback definition. Reviewed-by: Alex Bennée <alex.bennee@linaro.org> Signed-off-by: Richard Henderson <rth@twiddle.net>
2014-05-12tci: Define TCG_TARGET_INSN_UNIT_SIZERichard Henderson2-6/+14
And use tcg pointer differencing functions as appropriate. Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Richard Henderson <rth@twiddle.net>
2014-05-12tcg-mips: Define TCG_TARGET_INSN_UNIT_SIZERichard Henderson2-80/+37
And use tcg pointer differencing functions as appropriate. Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Richard Henderson <rth@twiddle.net>
2014-05-12tcg-ia64: Define TCG_TARGET_INSN_UNIT_SIZERichard Henderson2-145/+78
Using a 16-byte aligned structure achieves best results, both for code cleanliness and compiled code size. However, this means that we can't use the trick of encoding the slot number into the low 2 bits. Thankfully, we only ever use slot2, so make that explicit in the names of the relocation functions, and drop the code for other slots. Signed-off-by: Richard Henderson <rth@twiddle.net>
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