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2013-11-18tcg-ia64: Use A3 form of logical operationsRichard Henderson
We can and/or/xor/andcm small constants, saving one cycle. Acked-by: Aurelien Jarno <aurelien@aurel32.net> Signed-off-by: Richard Henderson <rth@twiddle.net>
2013-11-18tcg-ia64: Use SUB_A3 and ADDS_A4 for subtractionRichard Henderson
We can subtract from more small constants that just 0 with one insn, and we can add the negative for most small constants. Acked-by: Aurelien Jarno <aurelien@aurel32.net> Signed-off-by: Richard Henderson <rth@twiddle.net>
2013-11-18tcg-ia64: Use ADDS for small additionRichard Henderson
Avoids a wasted cycle loading up small constants. Simplify the code assuming the tcg optimizer is going to work and don't expect the first operand of the add to be constant. Acked-by: Aurelien Jarno <aurelien@aurel32.net> Signed-off-by: Richard Henderson <rth@twiddle.net>
2013-11-18tcg-ia64: Avoid unnecessary stop bit in tcg_out_aluRichard Henderson
When performing an operation with two input registers, we'd leave the stop bit (and thus an extra cycle) that's only needed when one or the other input is a constant. Acked-by: Aurelien Jarno <aurelien@aurel32.net> Signed-off-by: Richard Henderson <rth@twiddle.net>
2013-11-18tcg-ia64: Move AREG0 to R32Richard Henderson
Since the move away from the global areg0, we're no longer globally reserving areg0. Which means our use of R7 clobbers a call-saved register. Shift areg0 into the windowed registers. Indeed, choose the incoming parameter register that it comes to us by. This requires moving the register holding the return address elsewhere. Choose R33 for tidiness. Acked-by: Aurelien Jarno <aurelien@aurel32.net> Signed-off-by: Richard Henderson <rth@twiddle.net>
2013-11-18tcg-ia64: Simplify brcondRichard Henderson
There was a misconception that a stop bit is required between a compare and the branch that uses the predicate set by the compare. This lead to the usage of an extra bundle in which to perform the compare. The extra bundle left room for constants to be loaded for use with the compare insn. If we pack the compare and the branch together in the same bundle, then there's no longer any room for non-zero constants. At which point we can eliminate half the function by not handling them. Acked-by: Aurelien Jarno <aurelien@aurel32.net> Signed-off-by: Richard Henderson <rth@twiddle.net>
2013-11-18tcg-ia64: Handle constant callsRichard Henderson
Using only indirect calls results in 3 bundles (one to load the descriptor address), and 4 stop bits. By looking through the descriptor to the constants, we can perform the call with 2 bundles and only 1 stop bit. Acked-by: Aurelien Jarno <aurelien@aurel32.net> Signed-off-by: Richard Henderson <rth@twiddle.net>
2013-11-18tcg-ia64: Use shortcuts for nop insnsRichard Henderson
There's no need to go through the full opcode-to-insn function call to generate nops. This makes the source a bit more readable. Acked-by: Aurelien Jarno <aurelien@aurel32.net> Signed-off-by: Richard Henderson <rth@twiddle.net>
2013-11-18tcg-ia64: Use TCGMemOp within qemu_ldst routinesRichard Henderson
Acked-by: Aurelien Jarno <aurelien@aurel32.net> Signed-off-by: Richard Henderson <rth@twiddle.net>
2013-10-10tcg: Add tcg-be-null.hRichard Henderson
This is a no-op backend data implementation, for those targets that are not currently using the load/store optimization path. This is prepatory to always requiring these functions in all backends. Signed-off-by: Richard Henderson <rth@twiddle.net>
2013-09-02exec: Split softmmu_defs.hRichard Henderson
The _cmmu helpers can be moved to exec-all.h. The helpers that are used from TCG will shortly need access to tcg_target_long so move their declarations into tcg.h. This requires minor include adjustments to all TCG backends. Reviewed-by: Aurelien Jarno <aurelien@aurel32.net> Signed-off-by: Richard Henderson <rth@twiddle.net>
2013-09-02tcg: Change tcg_out_ld/st offset to intptr_tRichard Henderson
Reviewed-by: Aurelien Jarno <aurelien@aurel32.net> Signed-off-by: Richard Henderson <rth@twiddle.net>
2013-09-02tcg: Change relocation offsets to intptr_tRichard Henderson
Reviewed-by: Aurelien Jarno <aurelien@aurel32.net> Signed-off-by: Richard Henderson <rth@twiddle.net>
2012-12-19exec: move include files to include/exec/Paolo Bonzini
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2012-10-17tcg-ia64: Implement depositRichard Henderson
Note that in the general reg=reg,reg case we're restricted to 16-bit insertions. This makes it easy to allow "any" constant as input, as post-truncation it will fit into the constant load insn for which we have room in the bundle. Signed-off-by: Richard Henderson <rth@twiddle.net> Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2012-10-17tcg/ia64: slightly optimize TLB access codeAurelien Jarno
It is possible to slightly optimize the TLB access code, by replacing the movi + and instructions by a deposit instruction. Reviewed-by: Richard Henderson <rth@twiddle.net> Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2012-10-17tcg/ia64: remove suboptimal register shifting in qemu_ld/st opsAurelien Jarno
Remove suboptimal register shifting in qemu_ld/st ops, introduced at the CONFIG_TCG_PASS_AREG0 time. As mem_idx is now loaded in register R58/R59 for the slow path, we have to make sure to do it last, to not add additional register constraints. Reviewed-by: Richard Henderson <rth@twiddle.net> Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2012-10-17tcg/ia64: implement movcond_i32/64Aurelien Jarno
Implement movcond_i32/64 on ia64 hosts. It is not possible to have immediate compare arguments without adding a new bundle, but it is possible to have 22-bit immediate value arguments. Reviewed-by: Richard Henderson <rth@twiddle.net> Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2012-10-17tcg/ia64: use stack for TCG tempsBlue Swirl
Use stack instead of temp_buf array in CPUState for TCG temps. Signed-off-by: Blue Swirl <blauwirbel@gmail.com> Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2012-10-06tcg: remove obsolete jmp opAurelien Jarno
The TCG jmp operation doesn't really make sense in the QEMU context, it is unused, it is not implemented by some targets, and it is wrongly implemented by some others. This patch simply removes it. Reviewed-by: Richard Henderson <rth@twiddle.net> Acked-by: Blue Swirl <blauwirbel@gmail.com> Acked-by: Stefan Weil<sw@weilnetz.de> Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2012-09-22tcg: Remove tcg_target_get_call_iarg_regs_countStefan Weil
The TCG targets no longer need individual implementations. Since commit 6a18ae2d2947532d5c26439548afa0481c4529f9, 'flags' is no longer used in tcg_target_get_call_iarg_regs_count. The remaining tcg_target_get_call_iarg_regs_count is trivial and only called once. Therefore the patch eliminates it completely. Signed-off-by: Stefan Weil <sw@weilnetz.de> Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2012-09-15Remove unused CONFIG_TCG_PASS_AREG0 and dead codeBlue Swirl
Now that CONFIG_TCG_PASS_AREG0 is enabled for all targets, remove dead code and support for !CONFIG_TCG_PASS_AREG0 case. Remove dyngen-exec.h and all references to it. Although included by hw/spapr_hcall.c, it does not seem to use it. Remove unused HELPER_CFLAGS. Signed-off-by: Blue Swirl <blauwirbel@gmail.com> Reviewed-by: Richard Henderson <rth@twiddle.net>
2012-08-26tcg/ia64: fix and optimize ld/st slow pathAurelien Jarno
Store slow path has been broken in e141ab52d: - the arguments are shifted before the last one (mem_index) is written. - the shift is done for both slow and fast paths. Fix that. Also optimize a bit by bundling the move together. This still can be optimized, but it's better to wait for a decision to be taken on the arguments order. Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2012-08-26tcg/ia64: fix prologue/epilogueAurelien Jarno
Prologue and epilogue code has been broken in cea5f9a28. Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2012-03-18softmmu templates: optionally pass CPUState to memory access functionsBlue Swirl
Optionally, make memory access helpers take a parameter for CPUState instead of relying on global env. On most targets, perform simple moves to reorder registers. On i386, switch from regparm(3) calling convention to standard stack-based version. Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
2012-03-14Rename CPUState -> CPUArchStateAndreas Färber
Scripted conversion: for file in *.[hc] hw/*.[hc] hw/kvm/*.[hc] linux-user/*.[hc] linux-user/m68k/*.[hc] bsd-user/*.[hc] darwin-user/*.[hc] tcg/*/*.[hc] target-*/cpu.h; do sed -i "s/CPUState/CPUArchState/g" $file done All occurrences of CPUArchState are expected to be replaced by QOM CPUState, once all targets are QOM'ified and common fields have been extracted. Signed-off-by: Andreas Färber <afaerber@suse.de> Reviewed-by: Anthony Liguori <aliguori@us.ibm.com>
2011-11-14tcg: Use TCGReg for standard tcg-target entry points.Richard Henderson
Including tcg_out_ld, tcg_out_st, tcg_out_mov, tcg_out_movi. Signed-off-by: Richard Henderson <rth@twiddle.net> Reviewed-by: Andreas Färber <afaerber@suse.de> Reviewed-by: Stefan Weil <sw@weilnetz.de> Signed-off-by: Alexander Graf <agraf@suse.de>
2011-10-08tcg/ia64: Remove unused tcg_out_addi()Peter Maydell
Remove the unused function tcg_out_addi() from the ia64 TCG backend; this brings it into line with other backends. Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
2011-09-17tcg/ia64: Only one call output register needed for 64 bit hostsStefan Weil
The second register is never used for ia64 hosts. Cc: Aurelien Jarno <aurelien@aurel32.net> Signed-off-by: Stefan Weil <weil@mail.berlios.de> Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
2011-08-21tcg-ia64: Fix typos in AREG0 setup in prologue.Richard Henderson
Signed-off-by: Richard Henderson <rth@twiddle.net> Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
2011-06-26Delegate setup of TCG temporaries to targetsBlue Swirl
Delegate TCG temp_buf setup to targets, so that they can use a stack frame later instead. Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
2011-06-26cpu-exec.c: avoid AREG0 useBlue Swirl
Make functions take a parameter for CPUState instead of relying on global env. Pass CPUState pointer to TCG prologue, which moves it to AREG0. Thanks to Peter Maydell and Laurent Desnogues for the ARM prologue change. Revert the hacks to avoid AREG0 use on Sparc hosts. Move cpu_has_work() and cpu_pc_from_tb() from exec.h to cpu.h. Compile the file without HELPER_CFLAGS. Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
2011-01-12tcg arm/mips/ia64: add a comment about retranslation and cachesAurelien Jarno
Add a comment about cache coherency and retranslation, so that people developping new targets based on existing ones are warned of the issue. Acked-by: Edgar E. Iglesias <edgar.iglesias@gmail.com> Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2011-01-10tcg/ia64: remove an unnecessary stop bitAurelien Jarno
Spotted by Richard Henderson. Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2010-12-01tcg-ia64: Fix warning in qemu_ld.Richard Henderson
The usermode version of qemu_ld doesn't used mem_index, leading to set-but-not-used warnings. Signed-off-by: Richard Henderson <rth@twiddle.net> Signed-off-by: Edgar E. Iglesias <edgar@axis.com>
2010-12-01tcg-ia64: Fix address compilation in qemu_st.Richard Henderson
A typo in the usermode address calculation path; R3 used where R2 needed. Signed-off-by: Richard Henderson <rth@twiddle.net> Signed-off-by: Edgar E. Iglesias <edgar@axis.com>
2010-12-01tcg-ia64: Fix tlb read error for 32-bit targets.Richard Henderson
Use ld4 not ld8 for reading the tlb of 32-bit targets. Signed-off-by: Richard Henderson <rth@twiddle.net> Signed-off-by: Edgar E. Iglesias <edgar@axis.com>
2010-12-01tcg-ia64: Implement qemu_ld32.Richard Henderson
The port was not properly merged following 86feb1c860dc38e9c89e787c5210e8191800385e Signed-off-by: Richard Henderson <rth@twiddle.net> Signed-off-by: Edgar E. Iglesias <edgar@axis.com>
2010-12-01tcg-ia64: Provide default GUEST_BASE.Richard Henderson
Fix compilation error when GUEST_BASE is not defined. Signed-off-by: Richard Henderson <rth@twiddle.net> Signed-off-by: Edgar E. Iglesias <edgar@axis.com>
2010-06-09tcg: Make some tcg-target.c routines static.Richard Henderson
Both tcg_target_init and tcg_target_qemu_prologue are unused outside of tcg.c. Signed-off-by: Richard Henderson <rth@twiddle.net> Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2010-06-09tcg: Add TYPE parameter to tcg_out_mov.Richard Henderson
Mirror tcg_out_movi in having a TYPE parameter. This allows x86_64 to perform the move at the proper width, which may elide a REX prefix. Introduce a TCG_TYPE_REG enumerator to represent the "native width" of the host register, and to distinguish the usage from "pointer data" as represented by the existing TCG_TYPE_PTR. Update all targets to match. Signed-off-by: Richard Henderson <rth@twiddle.net> Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2010-05-21tcg-ia64: Load GUEST_BASE into a register.Richard Henderson
Saves one bundle per memory operation. Signed-off-by: Richard Henderson <rth@twiddle.net> Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2010-05-21tcg-ia64: Fix some register usage issues.Richard Henderson
(1) The output registers were not marked call-clobbered, even though they can be modified by called functions. (2) The thread pointer was not marked reserved. (3) R4-R6 are call-saved, but not saved by the prologue. Rather than save them, mark them reserved so that we don't use them. Signed-off-by: Richard Henderson <rth@twiddle.net> Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2010-04-08tcg/ia64: fix tlb addend readAurelien Jarno
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2010-04-01tcg: initial ia64 supportAurelien Jarno
A few words about design choices: * On IA64, instructions should be grouped by bundle, and dependencies between instructions declared. A first version of this code tried to schedule instructions automatically, but was very complex and too invasive for the current common TCG code (ops not ending at instruction boundaries, code retranslation breaking already generated code, etc.) It was also not very efficient, as dependencies between TCG ops is not available. Instead the option taken by the current implementation does not try to fill the bundle by scheduling instructions, but by providing ops not available as an ia64 instruction, and by offering 22-bit constant loading for most of the instructions. With both options the bundle are filled at approximately the same level. * Up to 128 registers can be affected to a function on IA64, but TCG limits this number to 64, which is actually more than enough. The register affectation is the following: - r0: used to map a constant argument with value 0 - r1: global pointer - r2, r3: internal use - r4 to r6: not used to avoid saving them - r7: env structure - r8 to r11: free for TCG (call clobbered) - r12: stack pointer - r13: thread pointer - r14 to r31: free for TCG (call clobbered) - r32: reserved (return address) - r33: reserved (PFS) - r33 to r63: free for TCG * The IA64 architecture has only 64-bit registers and no 32-bit instructions (the only exception being cmp4). Therefore 64-bit registers and instructions are used for 32-bit ops. The adopted strategy is the same as the ABI, that is the higher 32 bits are undefined. Most ops (and, or, add, shl, etc.) can directly use the 64-bit registers, while some others have to sign-extend (sar, div, etc.) or zero-extend (shr, divu, etc.) the register first. Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
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