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2014-02-08tcg: Add TCGV_UNUSED_PTR, TCGV_IS_UNUSED_PTR, TCGV_EQUAL_PTRPeter Maydell1-0/+3
We have macros for marking TCGv values as unused, checking if they are unused and comparing them to each other. However these only exist for TCGv_i32 and TCGv_i64; add them for TCGv_ptr as well. Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Richard Henderson <rth@twiddle.net>
2013-12-10tcg: Use bitmaps for free temporariesRichard Henderson1-5/+6
We previously allocated 32-bits per temp for the next_free_temp entry. We now allocate 4 bits per temp across the 4 bitmaps. Using a linked list meant that if a translator is tweeked, resulting in temps being freed in a different order, that would have follow-on effects throughout the TB. Always allocating the lowest free temp means that follow-on effects are minimized, which can make it easier to diff output when debugging the translators. Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Aurelien Jarno <aurelien@aurel32.net> Signed-off-by: Richard Henderson <rth@twiddle.net>
2013-10-10exec: Add both big- and little-endian memory helpersRichard Henderson1-16/+53
Step three in the transition: helpers not tied to the target "default" endianness. To be used when the guest uses a memory operation with non-default endianness. Signed-off-by: Richard Henderson <rth@twiddle.net>
2013-10-10tcg: Add TCGMemOpRichard Henderson1-0/+54
Signed-off-by: Richard Henderson <rth@twiddle.net>
2013-10-10tcg: Add tcg-be-ldst.hRichard Henderson1-29/+2
Move TCGLabelQemuLdst and related stuff out of tcg.h. Signed-off-by: Richard Henderson <rth@twiddle.net>
2013-10-10tcg: Merge tcg_register_helper into tcg_context_initRichard Henderson1-1/+0
Eliminates the repeated checks for having created the s->helpers hash table. Signed-off-by: Richard Henderson <rth@twiddle.net>
2013-10-10tcg: Use a GHashTable for tcg_find_helperRichard Henderson1-9/+1
Slightly changes the interface, in that we now return name instead of a TCGHelperInfo structure, which goes away. Reviewed-by: Stefan Weil <sw@weilnetz.de> Signed-off-by: Richard Henderson <rth@twiddle.net>
2013-10-10tcg: Delete tcg_helper_get_name declarationRichard Henderson1-1/+0
The function was deleted in 4dc81f2822187f4503d4bdb76785cafa5b28db0b. Reviewed-by: Stefan Weil <sw@weilnetz.de> Signed-off-by: Richard Henderson <rth@twiddle.net>
2013-09-02tcg: Introduce zero and sign-extended versions of load helpersRichard Henderson1-6/+15
Reviewed-by: Aurelien Jarno <aurelien@aurel32.net> Signed-off-by: Richard Henderson <rth@twiddle.net>
2013-09-02exec: Split softmmu_defs.hRichard Henderson1-0/+43
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: Use uintptr_t in TCGHelperInfoRichard Henderson1-1/+1
Reviewed-by: Aurelien Jarno <aurelien@aurel32.net> Signed-off-by: Richard Henderson <rth@twiddle.net>
2013-09-02tcg: Change relocation offsets to intptr_tRichard Henderson1-2/+2
Reviewed-by: Aurelien Jarno <aurelien@aurel32.net> Signed-off-by: Richard Henderson <rth@twiddle.net>
2013-09-02tcg: Change memory offsets to intptr_tRichard Henderson1-5/+3
Reviewed-by: Aurelien Jarno <aurelien@aurel32.net> Signed-off-by: Richard Henderson <rth@twiddle.net>
2013-09-02tcg: Change frame pointer offsets to intptr_tRichard Henderson1-5/+4
Reviewed-by: Aurelien Jarno <aurelien@aurel32.net> Signed-off-by: Richard Henderson <rth@twiddle.net>
2013-09-02tcg: Define TCG_ptr properlyRichard Henderson1-3/+3
Reviewed-by: Aurelien Jarno <aurelien@aurel32.net> Signed-off-by: Richard Henderson <rth@twiddle.net>
2013-09-02tcg: Define TCG_TYPE_PTR properlyRichard Henderson1-3/+6
Reviewed-by: Aurelien Jarno <aurelien@aurel32.net> Signed-off-by: Richard Henderson <rth@twiddle.net>
2013-09-02tcg: Allow TCG_TARGET_REG_BITS to be specified independantlyRichard Henderson1-8/+11
There are several hosts for which it would be useful to use the available 64-bit registers in a 32-bit pointer environment. Reviewed-by: Aurelien Jarno <aurelien@aurel32.net> Signed-off-by: Richard Henderson <rth@twiddle.net>
2013-09-02tcg: Change tcg_qemu_tb_exec return to uintptr_tRichard Henderson1-2/+1
Reviewed-by: Aurelien Jarno <aurelien@aurel32.net> Signed-off-by: Richard Henderson <rth@twiddle.net>
2013-09-02tcg: Add muluh and mulsh opcodesRichard Henderson1-0/+2
Use them in places where mulu2 and muls2 are used. Optimize mulx2 with dead low part to mulxh. Reviewed-by: Aurelien Jarno <aurelien@aurel32.net> Signed-off-by: Richard Henderson <rth@twiddle.net>
2013-07-09tcg: Simplify logic using TCG_OPF_NOT_PRESENTRichard Henderson1-1/+2
Expand the definition of "not present" to include "should not be present". This means we can simplify the logic surrounding the generic tcg opcodes for which the host backend ought not be providing definitions. Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Richard Henderson <rth@twiddle.net>
2013-07-09tcg: Split rem requirement from div requirementRichard Henderson1-0/+3
There are several hosts with only a "div" insn. Remainder is computed manually from the quotient and inputs. We can do this generically. Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Richard Henderson <rth@twiddle.net>
2013-03-03Handle CPU interrupts by inline checking of a flagPeter Maydell1-0/+5
Fix some of the nasty TCG race conditions and crashes by implementing cpu_exit() as setting a flag which is checked at the start of each TB. This avoids crashes if a thread or signal handler calls cpu_exit() while the execution thread is itself modifying the TB graph (which may happen in system emulation mode as well as in linux-user mode with a multithreaded guest binary). This fixes the crashes seen in LP:668799; however there are another class of crashes described in LP:1098729 which stem from the fact that in linux-user with a multithreaded guest all threads will use and modify the same global TCG date structures (including the generated code buffer) without any kind of locking. This means that multithreaded guest binaries are still in the "unsupported" category. Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Richard Henderson <rth@twiddle.net> Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
2013-03-03tcg: Document tcg_qemu_tb_exec() and provide constants for low bit usesPeter Maydell1-1/+43
Document tcg_qemu_tb_exec(). In particular, its return value is a combination of a pointer to the next translation block and some extra information in the low two bits. Provide some #defines for the values passed in these bits to improve code clarity. Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Richard Henderson <rth@twiddle.net> Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
2013-02-23tcg: Add signed multiword multiplication operationsRichard Henderson1-0/+1
Signed-off-by: Richard Henderson <rth@twiddle.net> Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
2013-02-23tcg: Add 64-bit multiword arithmetic operationsRichard Henderson1-0/+3
Matching the 32-bit multiword arithmetic that we already have. Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
2013-02-23tcg: Make 32-bit multiword operations optional for 64-bit hostsRichard Henderson1-1/+5
Signed-off-by: Richard Henderson <rth@twiddle.net> Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
2013-02-16TCG: Move translation block variables to new context inside tcg_ctx: tb_ctxEvgeny Voevodin1-0/+2
It's worth to clean-up translation blocks variables and move them into one context as was suggested by Swirl. Also if we use this context directly inside tcg_ctx, then it speeds up code generation a bit. Signed-off-by: Evgeny Voevodin <evgenyvoevodin@gmail.com> Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
2013-02-16TCG: Final globals clean-upEvgeny Voevodin1-3/+11
Signed-off-by: Evgeny Voevodin <evgenyvoevodin@gmail.com> Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
2012-12-29tcg: Add TCGV_IS_UNUSED_*Richard Henderson1-0/+3
Cc: Aurelien Jarno <aurelien@aurel32.net> Signed-off-by: Richard Henderson <rth@twiddle.net> Reviewed-by: Andreas Färber <afaerber@suse.de> Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
2012-12-10Merge remote-tracking branch 'stefanha/trivial-patches' into stagingAnthony Liguori1-2/+2
* stefanha/trivial-patches: pc_sysfw: Plug memory leak on pc_fw_add_pflash_drv() error path qemu-options: Fix space at EOL Fix spelling in comments and documentation Clean up pci_drive_hot_add()'s use of BlockInterfaceType arm: a9mpcore: remove un-used ptimer_iomem field target-sparc: Remove t0, t1 from CPUSPARCState target-m68k: Remove t1 from CPUM68KState target-alpha: Remove t0, t1 from CPUAlphaState s390x: Spelling fixes (endianess -> endianness, occured -> occurred) Fix comments (adress -> address, layed -> laid, wierd -> weird) Fix spelling (prefered -> preferred) configure: Remove stray debug output sd: Send debug printfery to stderr not stdout Conflicts: configure Resolve spelling conflict in configure. Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2012-12-08tcg/tcg.h: Duplicate global TCG gen_opc_ arrays into TCGContext.Evgeny Voevodin1-0/+3
Signed-off-by: Evgeny Voevodin <e.voevodin@samsung.com> Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
2012-12-07Fix comments (adress -> address, layed -> laid, wierd -> weird)Stefan Weil1-2/+2
Remove also a duplicated 'the'. Signed-off-by: Stefan Weil <sw@weilnetz.de> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2012-11-17TCG: Remove unused global variablesEvgeny Voevodin1-4/+0
Signed-off-by: Evgeny Voevodin <e.voevodin@samsung.com> Reviewed-by: Richard Henderson <rth@twiddle.net> Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
2012-11-17tcg/tcg.h: Duplicate global TCG variables in TCGContextEvgeny Voevodin1-0/+6
Signed-off-by: Evgeny Voevodin <e.voevodin@samsung.com> Reviewed-by: Richard Henderson <rth@twiddle.net> Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
2012-11-03tcg: Optimize qemu_ld/st by generating slow paths at the end of a blockYeongkyoon Lee1-0/+30
Add optimized TCG qemu_ld/st generation which locates the code of TLB miss cases at the end of a block after generating the other IRs. Currently, this optimization supports only i386 and x86_64 hosts. Signed-off-by: Yeongkyoon Lee <yeongkyoon.lee@samsung.com> Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
2012-10-28tcg: remove compatiblity call flagsAurelien Jarno1-4/+0
Reviewed-by: Richard Henderson <rth@twiddle.net> Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2012-10-28tcg: rework TCG helper flagsAurelien Jarno1-8/+18
The current helper flags, TCG_CALL_CONST and TCG_CALL_PURE might be confusing and doesn't provide enough granularity for some helpers (FP helpers for example). This patch changes them into the following helpers flags: - TCG_CALL_NO_READ_GLOBALS means that the helper does not read globals, either directly or via an exception. They will not be saved to their canonical location before calling the helper. - TCG_CALL_NO_WRITE_GLOBALS means that the helper does not modify any globals. They will only be saved to their canonical locations before calling helpers, but they won't be reloaded afterwise. - TCG_CALL_NO_SIDE_EFFECTS means that the call to the function is removed if the return value is not used. It provides convenience flags, to avoid helper definitions longer than 80 characters. It also provides compatibility flags, and updates the documentation. Reviewed-by: Richard Henderson <rth@twiddle.net> Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2012-10-28tcg: synchronize globals for ops with side effectsAurelien Jarno1-2/+2
Operations with side effects (in practice qemu_ld/st ops), only need to synchronize globals to make sure the CPU state is consistent in case of exception. Reviewed-by: Richard Henderson <rth@twiddle.net> Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2012-10-28tcg: sync output arguments on liveness requestAurelien Jarno1-0/+3
Synchronize an output argument when requested by the liveness analysis. This is needed so that the temp can be declared dead later. For that, add a new op_sync_args table in which each bit tells if the corresponding output argument needs to be synchronized with the memory. Pass it to the tcg_reg_alloc_* functions, and honor this bit. We need to synchronize the argument before marking it as dead, and we have to make sure all the infos about the temp are correctly filled. At the same time change some types from unsigned int to uint16_t when passing op_dead_args. Reviewed-by: Richard Henderson <rth@twiddle.net> Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2012-10-20exec: Allocate code_gen_prologue from code_gen_bufferRichard Henderson1-1/+1
We had a hack for arm and sparc, allocating code_gen_prologue to a special section. Which, honestly does no good under certain cases. We've already got limits on code_gen_buffer_size to ensure that all TBs can use direct branches between themselves; reuse this limit to ensure the prologue is also reachable. As a bonus, we get to avoid marking a page of the main executable's data segment as executable. Signed-off-by: Richard Henderson <rth@twiddle.net> Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
2012-10-07tcg: Remove redundant pointer from TCGContextStefan Weil1-2/+1
The pointer entry 'temps' always refers to the array entry 'static_temps'. Removing the pointer and renaming 'static_temps' to 'temps' reduces the size of TCGContext (4 or 8 byte) and allows better code generation. Signed-off-by: Stefan Weil <sw@weilnetz.de> Reviewed-by: Richard Henderson <rth@twiddle.net> Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
2012-10-06tcg: Add tcg_high_condRichard Henderson1-0/+17
The table that was recently added for hppa is generally usable. And with the renumbering of the TCG_COND constants it's not too difficult to compute rather than have a table. Signed-off-by: Richard Henderson <rth@twiddle.net> Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2012-10-06tcg: Add TCG_COND_NEVER, TCG_COND_ALWAYSRichard Henderson1-14/+23
There are several cases that can be handled easier inside both translators and code generators if we have out-of-band values for conditions. It's easy enough to handle ALWAYS and NEVER in the natural way inside the tcg middle-end. Signed-off-by: Richard Henderson <rth@twiddle.net> Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2012-10-06tcg: Add is_unsigned_condRichard Henderson1-0/+5
Before we rearrange the TCG_COND enumeration, add a predicate for the (single) use of comparisons vs TCGCond. Signed-off-by: Richard Henderson <rth@twiddle.net> Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2012-09-26tcg: Sanity check goto_tb inputRichard Henderson1-0/+1
Checking that we don't try for idx != [01] is trivial. Checking that we don't issue more than one of any index requires a tad more data and some ifdefs protecting that new variable. Signed-off-by: Richard Henderson <rth@twiddle.net> Cc: Max Filippov <jcmvbkbc@gmail.com> Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2012-09-26tcg: Add tcg_debug_assertRichard Henderson1-0/+9
Like the C assert macro, except only enabled for CONFIG_DEBUG_TCG, and without having to set _NDEBUG and disable all other asserts at the same time. The use of __builtin_unreachable (when available) gives the compiler the same information, which may (or may not) help it optimize better. Signed-off-by: Richard Henderson <rth@twiddle.net> Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2012-09-21tcg: Fix !USE_DIRECT_JUMPRichard Henderson1-1/+1
Commit 6375e09e changed the type of TranslationBlock.tb_next, but failed to change the type of TCGContext.tb_next. Signed-off-by: Richard Henderson <rth@twiddle.net> Reviewed-by: Andreas Färber <afaerber@suse.de> Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2012-09-21tcg: Introduce movcondRichard Henderson1-0/+1
Implemented with setcond if the target does not provide the optional opcode. Signed-off-by: Richard Henderson <rth@twiddle.net> Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2012-09-19revert "TCG: fix copy propagation"Aurelien Jarno1-5/+0
Given the copy propagation breakage on 32-bit hosts has been fixed commit e31b0a7c050711884ad570fe73df806520953618 can be reverted. Cc: Blue Swirl <blauwirbel@gmail.com> Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2012-09-11tcg: improve profilerAurelien Jarno1-0/+1
Now that there are two passes of optimization (optimize.c, liveness) there is no point of outputing the statistics of the liveness part only. Update the code to take into account both optimizations. Reviewed-by: Richard Henderson <rth@twiddle.net> Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
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