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2012-11-17TCG: Use gen_opparam_buf from context instead of global variable.Evgeny Voevodin1-5/+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>
2012-11-17TCG: Use gen_opc_buf from context instead of global variable.Evgeny Voevodin1-15/+15
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: Use gen_opparam_ptr from context instead of global variable.Evgeny Voevodin1-18/+18
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: Use gen_opc_ptr from context instead of global variable.Evgeny Voevodin1-8/+8
Signed-off-by: Evgeny Voevodin <e.voevodin@samsung.com> Reviewed-by: Richard Henderson <rth@twiddle.net> Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
2012-11-11tcg: properly check that op's output needs to be synced to memoryKirill Batuzov1-4/+4
Fix typo introduced in b3a1be87bac3a6aaa59bb88c1410f170dc9b22d5. Reported-by: Ruslan Savchenko <ruslan.savchenko@gmail.com> Signed-off-by: Kirill Batuzov <batuzovk@ispras.ru> Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2012-11-03tcg: Optimize qemu_ld/st by generating slow paths at the end of a blockYeongkyoon Lee1-0/+12
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>
2012-10-31tcg: don't remove op if output needs to be synced to memoryAurelien Jarno1-4/+4
Commit 9c43b68de628a1e2cba556adfb71c17028eb802e do not correctly check for dead outputs when they need to be synced to memory in case of half-dead operations. Fix that by applying the same pattern than for the default case. Tested-by: Stefan Weil <sw@weilnetz.de> Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2012-10-28tcg: rework TCG helper flagsAurelien Jarno1-8/+16
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 Jarno1-9/+24
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: don't explicitly save globals and tempsAurelien Jarno1-0/+12
The liveness analysis ensures that globals and temps are at the correct state at a basic block end or with an op with side effects. Avoid looping on all temps, this can be time consuming on targets with a lot of globals. Keep an assert in debug mode. Reviewed-by: Richard Henderson <rth@twiddle.net> Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2012-10-28tcg: start with local temps in TEMP_VAL_MEM stateAurelien Jarno1-1/+5
Start with local temps in TEMP_VAL_MEM state, to make possible a later check that all the temps are correctly saved back to memory. Reviewed-by: Richard Henderson <rth@twiddle.net> Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2012-10-28tcg: always mark dead input arguments as deadAurelien Jarno1-7/+7
Always mark dead input arguments as dead, even if the op is at the basic block end. This will allow to check that all temps are correctly saved. Reviewed-by: Richard Henderson <rth@twiddle.net> Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2012-10-28tcg: rewrite tcg_reg_alloc_mov()Aurelien Jarno1-45/+61
Now that the liveness analysis provides more information, rewrite tcg_reg_alloc_mov(). This changes the behaviour about propagating constants and memory accesses. We now take the assumption that once a value is loaded into a register (from memory or from a constant), it's better to keep it there than to reload it later. This assumption is now always almost correct given that we are now sure the corresponding temp is going to be used later (otherwise it would have been synchronized and marked as dead already). The assumption is wrong if one of the op after clobbers some registers including the one of the holding the temp (this can be avoided by allocating clobbered registers last, which is what most TCG target do), or in case of lack of available register. Reviewed-by: Richard Henderson <rth@twiddle.net> Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2012-10-28tcg: improve tcg_reg_alloc_movi()Aurelien Jarno1-0/+3
Now that the liveness analysis might mark some output temps as dead, call temp_dead() if needed. Reviewed-by: Richard Henderson <rth@twiddle.net> Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2012-10-28tcg: rework liveness analysisAurelien Jarno1-27/+37
Rework the liveness analysis by tracking temps that need to go back to memory in addition to dead temps tracking. This allows to mark output arguments as "need sync", and to synchronize them back to memory as soon as they are not written anymore. This way even arguments mapping to globals can be marked as "dead", avoiding moves to a new register when input and outputs are aliased. In addition it means that registers are freed as soon as temps are not used anymore, instead of waiting for a basic block end or an op with side effects. This reduces register spilling especially on CPUs with few registers, and spread the mov over all the TB, increasing the performances on in-order CPUs. Reviewed-by: Richard Henderson <rth@twiddle.net> Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2012-10-28tcg: sync output arguments on liveness requestAurelien Jarno1-36/+61
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>
2012-10-28tcg: add temp_sync()Aurelien Jarno1-15/+19
Add a new function temp_sync() to synchronize the canonical location of a temp with the value in the corresponding register, but without freeing the associated register. Rewrite temp_save() to call temp_sync() followed by temp_dead(). Reviewed-by: Richard Henderson <rth@twiddle.net> Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2012-10-28tcg: add tcg_reg_sync()Aurelien Jarno1-9/+20
Add a new function tcg_reg_sync() to synchronize the canonical location of a temp with the value in the associated register, but without freeing it. Rewrite tcg_reg_free() to first call tcg_reg_sync() and then to free the register. Reviewed-by: Richard Henderson <rth@twiddle.net> Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2012-10-28tcg: add temp_dead()Aurelien Jarno1-36/+31
A lot of code is duplicated to mark a temporary as dead. Replace it by temp_dead(), which in addition marks the temp as saved in memory for globals and local temps, instead of doing this a posteriori in temp_save(). Reviewed-by: Richard Henderson <rth@twiddle.net> Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2012-10-19Merge branch 'linux-user-for-upstream' of ↵Aurelien Jarno1-4/+0
git://git.linaro.org/people/rikuvoipio/qemu * 'linux-user-for-upstream' of git://git.linaro.org/people/rikuvoipio/qemu: linux-user: register align p{read, write}64 linux-user: ppc: mark as long long aligned tcg: Remove TCG_TARGET_HAS_GUEST_BASE define configure: Remove unnecessary host_guest_base code linux-user: If loading fails, print error as string, not number linux-user: Fix siginfo handling alpha-linux-user: Fix sigaltstack structure definition linux-user: Implement gethostname linux-user: Perform more checks on iovec lists linux-user: fix multi-threaded /proc/self/maps linux-user: fix statfs
2012-10-17tcg: Optimize mulu2Richard Henderson1-0/+19
Like add2, do operand ordering, constant folding, and dead operand elimination. The latter happens about 15% of all mulu2 during an x86_64 bios boot. Signed-off-by: Richard Henderson <rth@twiddle.net> Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2012-10-17tcg: Optimize half-dead add2/sub2Richard Henderson1-1/+33
When x86_64 guest is not in 64-bit mode, the high-part of the 64-bit add is dead. When the host is 32-bit, we can simplify to 32-bit arithmetic. Signed-off-by: Richard Henderson <rth@twiddle.net> Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2012-10-12tcg: Remove TCG_TARGET_HAS_GUEST_BASE definePeter Maydell1-4/+0
GUEST_BASE support is now supported by all TCG backends, and is now mandatory. Drop the now-pointless TCG_TARGET_HAS_GUEST_BASE define (set by every backend) and the error if it is unset. Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Richard Henderson <rth@twiddle.net> Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
2012-10-07tcg: Remove redundant pointer from TCGContextStefan Weil1-1/+0
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_COND_NEVER, TCG_COND_ALWAYSRichard Henderson1-0/+2
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>
2012-09-26tcg: Sanity check goto_tb inputRichard Henderson1-0/+4
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>
2012-09-22Merge branch 'tcg-sparc' of git://repo.or.cz/qemu/rthBlue Swirl1-1/+2
* 'tcg-sparc' of git://repo.or.cz/qemu/rth: tcg-sparc: Preserve branch destinations during retranslation tcg-sparc: Fix and enable direct TB chaining. tcg-sparc: Add %g/%o registers to alloc_order tcg-sparc: Use defines for temporaries. tcg-sparc: Mask shift immediates to avoid illegal insns. tcg-sparc: Clean up cruft stemming from attempts to use global registers. tcg-sparc: Change AREG0 in generated code to %i0. tcg-sparc: Support GUEST_BASE. tcg-sparc: Fix qemu_ld/st to handle 32-bit host. tcg-sparc: Assume v9 cpu always, i.e. force v8plus in 32-bit mode. tcg-sparc: Don't MAP_FIXED on top of the program tcg-sparc: Fix ADDX opcode. tcg-sparc: Hack in qemu_ld/st64 for 32-bit. linux-user: Use memcpy in get_user/put_user.
2012-09-22tcg: Remove tcg_target_get_call_iarg_regs_countStefan Weil1-2/+1
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>
2012-09-22tcg: remove #ifdef #endif around TCGOpcode testsAurelien Jarno1-12/+1
Commit 25c4d9cc changed all TCGOpcode enums to be available, so we don't need to #ifdef #endif the one that are available only on some targets. This makes the code easier to read. Reviewed-by: Richard Henderson <rth@twiddle.net> Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2012-09-21tcg-sparc: Assume v9 cpu always, i.e. force v8plus in 32-bit mode.Richard Henderson1-1/+2
Current code doesn't actually work in 32-bit mode at all. Since no one really noticed, drop the complication of v7 and v8 cpus. Eliminate the --sparc_cpu configure option and standardize macro testing on TCG_TARGET_REG_BITS / HOST_LONG_BITS Signed-off-by: Richard Henderson <rth@twiddle.net>
2012-09-21tcg: Introduce movcondRichard Henderson1-6/+5
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>
2012-09-19tcg: mark set_label with TCG_OPF_BB_END flagAurelien Jarno1-5/+0
set_label is effectively the end of a basic block, as no optimization can be made accross it. It was treated as such in the liveness analysis code, but as a special case. Mark it with TCG_OPF_BB_END flag so that this information can be used by other parts of the TCG code, and remove the special case in the liveness analysis code. Cc: Blue Swirl <blauwirbel@gmail.com> Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2012-09-11tcg: improve profilerAurelien Jarno1-1/+11
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>
2012-06-21qemu-log: cleanupBlue Swirl1-43/+49
Don't use global variables directly but via accessor functions. Rename globals. Convert macros to functions, add GCC format attributes. Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
2012-03-24tcg: Allow ELF_HOST_FLAGS and ELF_OSABI overrides in gdb-jit.Richard Henderson1-0/+6
Signed-off-by: Richard Henderson <rth@twiddle.net> Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
2012-03-24tcg: Add debug_info to JIT ELF image.Richard Henderson1-75/+158
This allows us to actually supply a function name in softmmu builds; gdb doesn't pick up the minimal symbol table otherwise. Also add a bit of documentation and statically generate more of the ELF image. Signed-off-by: Richard Henderson <rth@twiddle.net> Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
2012-03-24tcg: Use the GDB JIT debugging interface.Richard Henderson1-0/+194
This allows us to generate unwind info for the dynamicly generated code in the code_gen_buffer. Only i386 is converted at this point. Signed-off-by: Richard Henderson <rth@twiddle.net> Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
2012-03-18i386: Remove REGPARMBlue Swirl1-14/+0
Use stack based calling convention (GCC default) for interfacing with generated code instead of register based convention (regparm(3)). Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
2012-03-17Fix large memory chunks allocation with tcg_malloc.Kirill Batuzov1-5/+9
An attempt to allocate a large memory chunk after a small one resulted in circular links in list of pools. It caused the same memory being allocated twice for different arrays. Now pools for large memory chunks are kept in separate list and are freed during pool reset because current allocator can not reuse them. Signed-off-by: Kirill Batuzov <batuzovk@ispras.ru> Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
2012-03-11tcg: Improve tcg_out_label and fix its usage for w64Stefan Weil1-3/+3
tcg_out_label is always called with a third argument of pointer type which was casted to tcg_target_long. These casts can be avoided by changing the prototype of tcg_out_label. There was also a cast to long. For most hosts with sizeof(long) == sizeof(tcg_target_long) == sizeof(void *) this did not matter, but for w64 it was wrong. This is fixed now. Cc: Blue Swirl <blauwirbel@gmail.com> Cc: Richard Henderson <rth@twiddle.net> Signed-off-by: Stefan Weil <sw@weilnetz.de> Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
2012-03-03w64: fix type casts when calling flush_icache_rangeStefan Weil1-4/+5
Signed-off-by: Stefan Weil <sw@weilnetz.de> Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
2012-02-23tcg: Remove unneeded include statementsStefan Weil1-12/+0
The standard include files are already included in qemu-common.h. malloc.h and alloca.h were needed for alloca() which was removed from TCG code some years ago when switching from dyngen to TCG (see commit 49516bc0d622112caac9df628caf19010fda8b67). Signed-off-by: Stefan Weil <sw@weilnetz.de> Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
2011-12-02fix spelling in tcg sub directoryDong Xu Wang1-1/+1
Signed-off-by: Dong Xu Wang <wdongxu@linux.vnet.ibm.com> Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
2011-11-14tcg: Use TCGReg for standard tcg-target entry points.Richard Henderson1-4/+4
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>
2011-10-31tcg: Make ARRAY_SIZE(tcg_op_defs) globally availableStefan Weil1-0/+1
tcg_op_defs was already a global array. The tci disassembler also needs ARRAY_SIZE(tcg_op_defs), so add a new global constant with this value. Signed-off-by: Stefan Weil <sw@weilnetz.de>
2011-10-01tcg: Add some assertionsStefan Weil1-0/+2
Signed-off-by: Stefan Weil <weil@mail.berlios.de> Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
2011-10-01tcg: Add forward declarations for local functionsStefan Weil1-0/+16
These functions are defined in the tcg target specific file tcg-target.c. The forward declarations assert that every tcg target uses the same function prototype. Signed-off-by: Stefan Weil <weil@mail.berlios.de> Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
2011-08-23tcg: Update --enable-debug for TCG_OPF_NOT_PRESENT.Richard Henderson1-7/+8
Signed-off-by: Richard Henderson <rth@twiddle.net> Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Edgar E. Iglesias <edgar.iglesias@gmail.com>
2011-08-21tcg: Always define all of the TCGOpcode enum members.Richard Henderson1-0/+4
By always defining these symbols, we can eliminate a lot of ifdefs. To allow this to be checked reliably, the semantics of the TCG_TARGET_HAS_* macros must be changed from def/undef to true/false. This allows even more ifdefs to be removed, converting them into C if statements. Signed-off-by: Richard Henderson <rth@twiddle.net> Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
2011-08-21tcg: Add and use TCG_OPF_64BIT.Richard Henderson1-1/+1
This allows the simplification of the op_bits function from tcg/optimize.c. Signed-off-by: Richard Henderson <rth@twiddle.net> Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
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