fix FETOX & FTWOTOX translations for x86_64
Fix SAHF_SETO_PROFITABLE code for x86-64 platforms. This was only an experiment. Improvement was marginal: only +3% on AMD64 (an Athlon 64 3200+). However, it may be interesting to test it on EM64T (e.g. newer P4s) since an older P3/800, hence in 32-bit mode, got a +15% improvement in Speedometer 4 benchmarks. Rationale: lahf/seto sequences avoid load/stores to the stack (push/pop) and it was thus hoped to be faster. Anyhow, SAHF_SETO_PROFITABLE can only be enabled manually at this time. Edit your generated Makefile for testing, but first make sure your CPU supports lahf in 64-bit mode (lahf_lm flag in /proc/cpuinfo).
more precise callee-saved register set
fix stack alignment (theoritically but it was OK in practise) in generated functions, move m68k_compile_execute() to compiler/ dir since it's JIT generic and it now depends on USE_PUSH_POP (as it should)
Stop abort()'ing when we fail to recognize the underlying processor, assume an obsolete i386 instead. Keep report on stderr though.
recognize more P4 cores
Recognize lahf_lm from Dual Core Opterons. This enables use of LAHF/SETO instructions in long mode (64-bit). However, there seems to be another bug in the JIT preventing it from being fully supported. m68k.h & codegen_x86.h are easily fixed bug another patch is still needed.
Allocate executable space to detect cpu features (cpuid). aka don't crash on non-executable .data sections on x86-64 with NX support enabled.
Happy New Year!
fix tester for BSF flags handling
Merge BSF simulation on P4 from Amithlon. Use 33-bit memory addressing model.
fix JIT FPU for x86_64
preserve r11 as the register used to resolve pointers to functions
- affine need_to_preserve[] to get close to linux/x86_64 ABI - optimize NOP fillers on x86-64 (based on GNU as implementation)
revive and fix almost two-year old port to x86_64
Happy New Year! :)
Call correct PUSHF/POPF macro
Remove some dead code. Start implementation of optimized calls to interpretive fallbacks for untranslatable instruction handlers. Disabled for now since call_m_01() is not correctly imeplemented yet.
Detect x86-64
Emulate CMOV in the new code generator for processors that don't support this intruction
Add missing wrappers of the new runtime-assembler primitives
Add new backend, disabled for until it's proofread and fully functional Remove obsolete string-related instructions
clobber "cc" for flags, not "flags". Thanks Milan for noticing it.
Implement a generic setzflg_l() for P4, thus permitting to re-enable translation of ADDX/SUBX/BCLR/BTST/BSET/BCHG instructions. i.e. make it faster. ;-)
Workaround change in flags handling for BSF instruction on Pentium 4. i.e. currently disable translation of ADDX/SUBX/B<CHG,CLR,SET,TST> instructions in that case. That is to say, better (much?) slower than inaccurate. :-(
Some instructions assume offsets are only 1-byte long. I don't think this is 100% correct. Therefore, insert some asserts so that would fail.
Add raw_emit_nop_filler() with more efficient no-op fillers stolen from GNU binutils 2.12.90.0.15. Speed bump is marginal (less than 6%). Make it default though, that's conditionalized by tune_nop_fillers constant.
Don't forget to note CPU detection code mostly comes from Linux kernel.
JIT add copyright notices just to notify people that's real derivative work from GPL code (UAE-JIT). Additions and improvements are from B2 developers.
- #include "flags_x86.h" here to get NATICE_CC_?? helper macros - Add raw_cmp_b_mi() and raw_call_m_indexed() for generated m68k_compile_execute() function
Fix align_jumps for athlon, that's really "16" and gcc-3.2 sources contained the same error. ;-)
- Rewrite raw_init_cpu() to match more details, from kernel sources. - Add possibility to tune code alignment to the underlying processor. However, this is turned off as I don't see much improvement and align_jumps = 64 for Athlon looks suspicious to me. - Remove two extra align_target() that are already covered. - Remove unused may_trap() predicate.
Optimize runtime assembler with shorter equivalents when the accumulator (%eax) is referenced along with immediates.
Import JIT compiler
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