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2011-01-17Optimize and clean-up the exact equality/non-equality instructionsBjörn Gustavsson
The is_eq_exact/3 and is_ne_exact/3 instructions are commonly used with one immediate or literal operand. Introduce three new specialized instructions: i_is_eq_exact_literal/3 i_is_ne_exact_immed/3 i_is_ne_exact_literal/3 The i_is_ne_exact_literal/3 instruction is not very frequently used, but its existence is justified because we removed in a a previous commit the special instruction for matching bignums and we now use i_is_ne_exact_literal/3 instead. For consistency, rename the existing is_eq_immed/3 instruction to is_eq_exact_immed/3. While at it, remove the optimization of an is_eq/3 instruction with an immediate operand because that optimization is already done by the compiler.
2011-01-17Optimize addition of a small integer to a variableBjörn Gustavsson
Introduce a new i_increment/4 to optimize the addition of a register and a small integer. This instruction saves two instruction words compared to the standard instructions (an i_fetch/2 instruction followed by a i_plus/3 instruction) and will also be slightly faster.
2011-01-17Introduce a special instruction for select_val with two valuesBjörn Gustavsson
The new instruction will save one word (because no size operand is needed), and is slightly faster. Handle select_tuple_arity in the same way.
2011-01-17Introduce a few more specialized put_list instructionsBjörn Gustavsson
2011-01-17Eliminate the "put_list c n Dst" instructionsBjörn Gustavsson
Since the literal (constant) pool was introduced in R12, the BEAM compiler will never generate a "put_list Const [] Dst" instruction (it will instead generate a "move [Const] Dst" instruction).
2011-01-17Eliminate the specific move_sd instructionBjörn Gustavsson
The move_sd specific instruction is no longer used since there are specific move instructions covering all possible permutations of operands. Also eliminate the move_cy instruction because it is almost never generated by the compiler.
2011-01-17Eliminate use of GetArg1() in the badmatch and case_end instructionsBjörn Gustavsson
Create separate instructions for each register type. The "badmatch x(0)" and "case_end x(0)" (which are very common) will only require a single word each, compared to two words when GetArg1() is used.
2011-01-17Eliminate use of GetArg2() in the i_element instructionBjörn Gustavsson
Use separate instructions for each register type.
2011-01-17Eliminate use of GetArg1() in the fast_element instructionBjörn Gustavsson
Use separate instructions for each register type.
2011-01-17Eliminate use of GetArg1() in the jump_on_val* instructionsBjörn Gustavsson
2011-01-17Eliminate use of GetArg1() in the select_val instructionBjörn Gustavsson
Instead of having one i_select_val_sfI instruction that uses the GetArg1() macro to fetch the controlling expression, use three separate instructions for each of the register types. That will save one word when selecting on the {x,0} register. It should also be slightly faster since a conditional branch is eliminated. Although it seems that the BEAM compiler will never generate a constant controlling expression (even with optimizations turned off), we still make sure that they will work by evaluating the select_val instruction at load time. Handle the select_tuple_arity instruction in the same way.
2011-01-17beam_emu: Eliminate sloppy use of tmp_arg1 and tmp_arg2Björn Gustavsson
The tmp_arg1 and tmp_arg2 variables are intended for transferring values from the fetch/2 instructions to instructions such as i_plus/3. In many places, however, tmp_arg1 and tmp_arg2 are used as general temporary variables within a single instruction. Improve the code generation by replacing sloppy use of tmp_arg1 and tmp_arg2 with block-local variables. In most cases, that will allow the temporary values to be kept in registers.
2011-01-17beam_emu: Don't inline helper functions into process_main()Björn Gustavsson
By default, GCC will inline calls to helper functions. Since process_main() is already huge, there is no reason to inline the helper functions (and some of them are used very seldom).
2011-01-17beam_emu: Clean up calling of the error_handler moduleBjörn Gustavsson
There were two separate functions (call_error_handler() and call_breakpoint_handler()) that were identical except for the name of the function in the error_handler module being called. Generalize call_error_handler() by adding a function name argument so that it can be used for both purposes. Also let the call_error_handler() return the new program counter instead of passing it in c_p->i. That slightly decrease the code size at the call site. There is also no need to use the Dispatch() macro to yet again decrease the reduction counter, because that has just been done by the call instruction that caused the execution of the call_error_handler or i_debug_breakpoint instruction.
2011-01-17Simplify a select_val instruction that selects only one valueBjörn Gustavsson
The compiler does not generate select_val instructions that only selects one value, but the loader may previously have created such an instruction when it splitted a select_val instruction that selected on bignums.
2011-01-17Optimize creation of tuplesBjörn Gustavsson
Combine the put_tuple/2 and all following put/1 instructions to one i_put_tuple/2 instruction. In general, that will reduce the number of instruction words by 50 percent. Measurements seem to indicate that the speed is about the same.
2011-01-17beam_makeops: Support jumping to common code from an instruction macroBjörn Gustavsson
2011-01-17beam_load: Run the packing engine before loading list argumentsBjörn Gustavsson
2011-01-17Allow packing of some more instructionsBjörn Gustavsson
2011-01-17Support packing of the 'I' type in a 64-bit emulatorBjörn Gustavsson
In many (not all) cases, the value for the 'I' type will fit into 32 bits.
2011-01-17beam_makeops: Refactor packing code to facilitate extensionsBjörn Gustavsson
We don't want the packable types listed in two places.
2011-01-17Eliminate redundant jump instructionsBjörn Gustavsson
2011-01-17Eliminate the special instructions for selecting floats and bignumsBjörn Gustavsson
2011-01-17Add test for non-matching big numberBjörn Gustavsson
2011-01-17BEAM loader: Introduce a new move2_xxxx instructionBjörn Gustavsson
2011-01-17BEAM loader: Pack more instructions using a new 'Q' typeBjörn Gustavsson
Introduce a new 'Q' type, similar to 'P' except that it can be packed.
2011-01-17If the wordsize is 64 bits, pack up to 4 operands into a wordBjörn Gustavsson
In the 32-bit BEAM emulator, it is only possible to pack 3 register operands into one word. Therefore, the move2 instruction (that has 4 operands) needs two words for its operands. Take advantage of the larger wordsize in the 64-bit emulator and pack up to 4 operands into a single word.
2011-01-17Pass the external word size to the beam_makeops scriptBjörn Gustavsson
Giving the beam_makeops script access to the external word size (=the size of instruction words) will allow it to pack more operands into a word for the 64 bits emulator.
2011-01-17BEAM loader: Combine is_type/1 and is_eq/1 instructionsBjörn Gustavsson
In the transformation engine in the loader, an is_eq/1 instruction is currently always preceded by an is_type/1 instruction. Therefore, save a word and slight amount of time by combining those instructions into an is_type_eq/2 instruction.
2011-01-17BEAM loader: Omit type tests for instructions that don't need themBjörn Gustavsson
2011-01-17beam_debug: Fix dissambly of some variable-operand instructionsBjörn Gustavsson
The i_jump_on_val_zero/3 and i_select_tuple_arity/3 instructions were not disassembled correctly.
2011-01-17beam_debug: Change one occurrence of "X[0]" to "x[0]" for consistencyBjörn Gustavsson
2011-01-17beam_makeops: Allow -pack and -nonext to be combinedBjörn Gustavsson
2011-01-17beam_makeops: Relax requirements for having specific instructionsBjörn Gustavsson
2011-01-17BEAM loader: Fix bug in handling of "rest" argumentsBjörn Gustavsson
It would only really work in simple case like: select_val S=q Fail=f Size=u Rest=* => ... where all operands for a single instruction where bound to variables, and not for more complicated cases such as: i_put_tuple Dst Arity Puts=* | put PutSrc => ...
2011-01-17Remove the last vestiges of the allocating fmove/2 instructionBjörn Gustavsson
There was a version of the BEAM loader and emulator that had two versions of the fmove/2 instruction, one version that allocated heap space internally and a newer version that assumed that a previous test_heap/2 instruction had already allocated the heap space. Though the allocating fmove/2 instruction is no longer supported, some vestiges of it still remains.
2011-01-17Makefile.in: Add dependency for files generated by util/beam_makeopsBjörn Gustavsson
2011-01-17Add utils/count for counting the static instruction frequencyBjörn Gustavsson
2011-01-17Add erts_debug:instructions/0 for listing all specific instructionsBjörn Gustavsson
erts_debug:instructions/0 is useful for finding which specific instructions that are not used at all.
2010-12-08Update version numbersBjörn-Egil Dahlberg
2010-12-07Merge branch 'pan/doc-md-panic-fix' into devOTP_R14B01Patrik Nyblom
* pan/doc-md-panic-fix: Workaround for ampersands in INSTALL-WIN32.md
2010-12-07Workaround for ampersands in INSTALL-WIN32.mdPatrik Nyblom
2010-12-06Prepare releaseErlang/OTP
2010-12-06Merge branch 'mc/dialyzer-doc' into devNiclas Axelsson
* mc/dialyzer-doc: dialyzer: Update documentation
2010-12-06dialyzer: Update documentationMaria Christakis
2010-12-06Merge branch 'rickard/rwmutex-bug/OTP-8925' into devRickard Green
* rickard/rwmutex-bug/OTP-8925: Fix erroneous assertion
2010-12-06Fix erroneous assertionRickard Green
2010-12-03Merge branch 'sverker/ets_compress/OTP-8922' into devSverker Eriksson
* sverker/ets_compress/OTP-8922: Fix ets_SUITE:types to not fail due to false mem leaks
2010-12-03Fix ets_SUITE:types to not fail due to false mem leaksSverker Eriksson
Waiting for table sys_dist to stablize after slave node has been stopped.
2010-12-03Merge branch 'pan/inet6_corrections/OTP-8969' into devRaimo Niskanen
* pan/inet6_corrections/OTP-8969: Stop using uncertain flags for getaddrinfo() Teach inet_test_lib to understand enetunreach Make windows inet_gethost work for ipv6