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2019-05-22tcg: Add TCG_OPF_NOT_PRESENT if TCG_TARGET_HAS_foo is negativeRichard Henderson
If INDEX_op_foo is always expanded by tcg_expand_vec_op, then there may be no reasonable set of constraints to return from tcg_target_op_def for that opcode. Let TCG_TARGET_HAS_foo be specified as -1 in that case. Thus a boolean test for TCG_TARGET_HAS_foo is true, but we will not assert within process_op_defs when no constraints are specified. Compare this with tcg_can_emit_vec_op, which already uses this tri-state indication. Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2019-05-22tcg: Add support for vector compare selectRichard Henderson
Perform a per-element conditional move. This combination operation is easier to implement on some host vector units than plain cmp+bitsel. Omit the usual gvec interface, as this is intended to be used by target-specific gvec expansion call-backs. Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2019-05-22tcg: Add support for vector bitwise selectRichard Henderson
This operation performs d = (b & a) | (c & ~a), and is present on a majority of host vector units. Include gvec expanders. Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2019-05-13tcg: Add support for vector absolute valueRichard Henderson
Reviewed-by: Alex Bennée <alex.bennee@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2019-05-13tcg: Add INDEX_op_dupm_vecRichard Henderson
Allow the backend to expand dup from memory directly, instead of forcing the value into a temp first. This is especially important if integer/vector register moves do not exist. Note that officially tcg_out_dupm_vec is allowed to fail. If it did, we could fix this up relatively easily: VECE == 32/64: Load the value into a vector register, then dup. Both of these must work. VECE == 8/16: If the value happens to be at an offset such that an aligned load would place the desired value in the least significant end of the register, go ahead and load w/garbage in high bits. Load the value w/INDEX_op_ld{8,16}_i32. Attempt a move directly to vector reg, which may fail. Store the value into the backing store for OTS. Load the value into the vector reg w/TCG_TYPE_I32, which must work. Duplicate from the vector reg into itself, which must work. All of which is well and good, except that all supported hosts can support dupm for all vece, so all of the failure paths would be dead code and untestable. Reviewed-by: Alex Bennée <alex.bennee@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2019-04-24tcg: Add INDEX_op_extract2_{i32,i64}Richard Henderson
This will let backends implement the double-word shift operation. Reviewed-by: David Hildenbrand <david@redhat.com> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2019-01-28tcg: Add opcodes for vector minmax arithmeticRichard Henderson
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2019-01-28tcg: Add opcodes for vector saturated arithmeticRichard Henderson
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2018-12-26tcg: Add TCG_OPF_BB_EXITRichard Henderson
Use this to notice the opcodes that exit the TB, which implies that local temps are really dead and need not be synced. Previously we so marked the true end of the TB, but that was immediately overwritten by the la_bb_end invoked by any TCG_OPF_BB_END opcode, like exit_tb. Reviewed-by: Emilio G. Cota <cota@braap.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2018-03-28tcg: Mark muluh_i64 and mulsh_i64 as 64-bit opsRichard Henderson
Failure to do so results in the tcg optimizer sign-extending any constant fold from 32-bits. This turns out to be visible in the RISC-V testsuite using a host that emits these opcodes (e.g. any non-x86_64). Reported-by: Michael Clark <mjc@sifive.com> Reviewed-by: Emilio G. Cota <cota@braap.org> Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2018-02-08tcg: Add generic vector ops for multiplicationRichard Henderson
Reviewed-by: Alex Bennée <alex.bennee@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2018-02-08tcg: Add generic vector ops for comparisonsRichard Henderson
Reviewed-by: Alex Bennée <alex.bennee@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2018-02-08tcg: Add generic vector ops for constant shiftsRichard Henderson
Opcodes are added for scalar and vector shifts, but considering the varied semantics of these do not expose them to the front ends. Do go ahead and provide them in case they are needed for backend expansion. Reviewed-by: Alex Bennée <alex.bennee@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2018-02-08tcg: Add generic vector expandersRichard Henderson
Reviewed-by: Alex Bennée <alex.bennee@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2018-02-08tcg: Add types and basic operations for host vectorsRichard Henderson
Nothing uses or enables them yet. Reviewed-by: Alex Bennée <alex.bennee@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2017-06-05tcg: Introduce goto_ptr opcode and tcg_gen_lookup_and_goto_ptrEmilio G. Cota
Instead of exporting goto_ptr directly to TCG frontends, export tcg_gen_lookup_and_goto_ptr(), which calls goto_ptr with the pointer returned by the lookup_tb_ptr() helper. This is the only use case we have for goto_ptr and lookup_tb_ptr, so having this function is very convenient. Furthermore, it trivially allows us to avoid calling the lookup helper if goto_ptr is not implemented by the backend. Reviewed-by: Alex Bennée <alex.bennee@linaro.org> Signed-off-by: Emilio G. Cota <cota@braap.org> Message-Id: <1493263764-18657-2-git-send-email-cota@braap.org> Message-Id: <1493263764-18657-3-git-send-email-cota@braap.org> Message-Id: <1493263764-18657-4-git-send-email-cota@braap.org> Message-Id: <1493263764-18657-5-git-send-email-cota@braap.org> [rth: Squashed 4 related commits.] Signed-off-by: Richard Henderson <rth@twiddle.net>
2017-01-10tcg: Add opcode for ctpopRichard Henderson
The number of actual invocations of ctpop itself does not warrent an opcode, but it is very helpful for POWER7 to use in generating an expansion for ctz. Reviewed-by: Alex Bennée <alex.bennee@linaro.org> Signed-off-by: Richard Henderson <rth@twiddle.net>
2017-01-10tcg: Add clz and ctz opcodesRichard Henderson
Reviewed-by: Alex Bennée <alex.bennee@linaro.org> Signed-off-by: Richard Henderson <rth@twiddle.net>
2017-01-10tcg: Add field extraction primitivesRichard Henderson
Adds tcg_gen_extract_* and tcg_gen_sextract_* for extraction of fixed position bitfields, much like we already have for deposit. Reviewed-by: Alex Bennée <alex.bennee@linaro.org> Signed-off-by: Richard Henderson <rth@twiddle.net>
2016-09-16Introduce TCGOpcode for memory barrierPranith Kumar
This commit introduces the TCGOpcode for memory barrier instruction. This opcode takes an argument which is the type of memory barrier which should be generated. Signed-off-by: Pranith Kumar <bobby.prani@gmail.com> Message-Id: <20160714202026.9727-2-bobby.prani@gmail.com> Signed-off-by: Richard Henderson <rth@twiddle.net>
2015-10-19tcg-opc.h: Simplify insn_start defJames Hogan
We already have a TLADDR_ARGS definition, so rearrange the order slightly and use it in the definition of insn_start, instead of having an #ifdef. Reviewed-by: Aurelien Jarno <aurelien@aurel32.net> Signed-off-by: James Hogan <james.hogan@imgtec.com> Signed-off-by: Richard Henderson <rth@twiddle.net> Message-Id: <1443788657-14537-2-git-send-email-james.hogan@imgtec.com>
2015-10-07tcg: Allow extra data to be attached to insn_startRichard Henderson
With an eye toward having this data replace the gen_opc_* arrays that each target collects in order to enable restore_state_from_tb. Reviewed-by: Aurelien Jarno <aurelien@aurel32.net> Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Richard Henderson <rth@twiddle.net>
2015-10-07tcg: Rename debug_insn_start to insn_startRichard Henderson
With an eye toward making it mandatory. Reviewed-by: Aurelien Jarno <aurelien@aurel32.net> Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Richard Henderson <rth@twiddle.net>
2015-08-24tcg: Split trunc_shr_i32 opcode into extr[lh]_i64_i32Richard Henderson
Rather than allow arbitrary shift+trunc, only concern ourselves with low and high parts. This is all that was being used anyway. Signed-off-by: Richard Henderson <rth@twiddle.net>
2015-08-24tcg: implement real ext_i32_i64 and extu_i32_i64 opsAurelien Jarno
Implement real ext_i32_i64 and extu_i32_i64 ops. They ensure that a 32-bit value is always converted to a 64-bit value and not propagated through the register allocator or the optimizer. Cc: Andrzej Zaborowski <balrogg@gmail.com> Cc: Alexander Graf <agraf@suse.de> Cc: Blue Swirl <blauwirbel@gmail.com> Cc: Stefan Weil <sw@weilnetz.de> Acked-by: Claudio Fontana <claudio.fontana@huawei.com> Signed-off-by: Aurelien Jarno <aurelien@aurel32.net> Signed-off-by: Richard Henderson <rth@twiddle.net>
2015-08-24tcg: rename trunc_shr_i32 into trunc_shr_i64_i32Aurelien Jarno
The op is sometimes named trunc_shr_i32 and sometimes trunc_shr_i64_i32, and the name in the README doesn't match the name offered to the frontends. Always use the long name to make it clear it is a size changing op. Signed-off-by: Aurelien Jarno <aurelien@aurel32.net> Signed-off-by: Richard Henderson <rth@twiddle.net>
2015-05-14tcg: Merge memop and mmu_idx parameters to qemu_ld/stRichard Henderson
At the tcg opcode level, not at the tcg-op.h generator level. This requires minor changes through all of the tcg backends, but none of the cpu translators. Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Richard Henderson <rth@twiddle.net>
2015-02-12tcg: Remove unused opcodesRichard Henderson
We no longer need INDEX_op_end to terminate the list, nor do we need 5 forms of nop, since we just remove the TCGOp instead. Reviewed-by: Bastian Koppelmann <kbastian@mail.uni-paderborn.de> Signed-off-by: Richard Henderson <rth@twiddle.net>
2014-06-04tcg: Remove TCG_TARGET_HAS_new_ldstRichard Henderson
Since all backends have been converted, remove the compatibility code. Acked-by: Claudio Fontana <claudio.fontana@huawei.com> Signed-off-by: Richard Henderson <rth@twiddle.net>
2014-05-12tcg: Remove unreachable code in tcg_out_op and op_defsRichard Henderson
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: Make call address a constant parameterRichard Henderson
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>
2014-04-28tcg: Add INDEX_op_trunc_shr_i32Richard Henderson
Let the backend do something special for truncation. Signed-off-by: Richard Henderson <rth@twiddle.net>
2013-10-10tcg: Add qemu_ld_st_i32/64Richard Henderson
Step two in the transition, adding the new ldst opcodes. Keep the old opcodes around until all backends support the new opcodes. Signed-off-by: Richard Henderson <rth@twiddle.net>
2013-09-02tcg: Add muluh and mulsh opcodesRichard Henderson
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 Henderson
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: Allow non-constant control macrosRichard Henderson
This allows TCG_TARGET_HAS_* to be a variable rather than a constant, which allows easier support for differing ISA levels for the host. 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 Henderson
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>
2013-02-23tcg: Add signed multiword multiplication operationsRichard Henderson
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 Henderson
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 Henderson
Signed-off-by: Richard Henderson <rth@twiddle.net> Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
2012-10-28tcg: forbid ld/st function to modify globalsAurelien Jarno
Mapping a memory address using a global and accessing it through ld/st operations is currently broken. As it doesn't make any sense to do that performance wise, let's forbid that. Update the TCG documentation, and remove partial support for that. Reviewed-by: Richard Henderson <rth@twiddle.net> Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2012-10-28tcg: fix some op flagsAurelien Jarno
Some branch related ops are marked with TCG_OPF_SIDE_EFFECTS, some other not. In practice they don't need to, as they are all marked with TCG_OPF_BB_END, which is handled specifically in all the code. The call op is marked as TCG_OPF_SIDE_EFFECTS, which might be not true as there is are specific flags (TCG_CALL_CONST and TCG_CALL_PURE) for specifying that. On the other hand it always clobber arguments, so mark it as such even if the call op is handled in a different code path. Reviewed-by: Richard Henderson <rth@twiddle.net> 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>
2012-09-21tcg: Introduce movcondRichard Henderson
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 Jarno
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>
2011-08-21tcg: Always define all of the TCGOpcode enum members.Richard Henderson
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 Henderson
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>
2011-01-20tcg: Define "deposit" as an optional operation.Richard Henderson
Signed-off-by: Richard Henderson <rth@twiddle.net> Signed-off-by: Edgar E. Iglesias <edgar.iglesias@gmail.com>
2010-06-09tcg: get rid of DEF2 in tcg-opc.hAurelien Jarno
Now that tcg-opc.h is only used in TCG code, get rid of DEF2 in tcg-opc.h. Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2010-06-09tcg: get rid of copy_size in TCGOpDefAurelien Jarno
copy_size is a left-over from the dyngen era, remove it. Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
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