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2012-11-24target-mips: remove POOL48A from the microMIPS decodingAurelien Jarno
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2012-11-24target-mips: Clean up microMIPS32 major opcode陳韋任 (Wei-Ren Chen)
I check MIPS microMIPS manual [1], and found the major opcode might be wrong. I add a comment to explicitly indicate what manual I am refering to, and according that manual I remove microMIPS32 major opcodes 0x1f. As for others, like 0x16, 0x17, 0x36 and 0x37, they are for higher-order MIPS ISA level or new revision of this microMIPS architecture. Quote from Johnson, they are belong MIPS64 [2]. [1] http://www.mips.com/products/architectures/micromips/#specifications MIPS Architecture for Programmers Volume II-B: The microMIPS32 Instruction Set (Revision 3.05) MD00582-2B-microMIPS-AFP-03.05.pdf [2] http://www.mips.com/products/architectures/mips64/ MIPS Architecture For Programmers Volume II-A: The MIPS64 Instruction Set MD00087-2B-MIPS64BIS-AFP-03.51.pdf Signed-off-by: Chen Wei-Ren <chenwj@iis.sinica.edu.tw> Reviewed-by: Eric Johnson <ericj@mips.com> Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2012-11-24target-mips: Add comments on POOL32Axf encoding陳韋任 (Wei-Ren Chen)
Current QEMU MIPS POOL32AXF encoding comes from microMIPS32 and microMIPS32 DSP. Add comment here to help reading. Signed-off-by: Chen Wei-Ren <chenwj@iis.sinica.edu.tw> Reviewed-by: Eric Johnson <ericj@mips.com> Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2012-11-17TCG: Use gen_opc_buf from context instead of global variable.Evgeny Voevodin
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 Voevodin
Signed-off-by: Evgeny Voevodin <e.voevodin@samsung.com> Reviewed-by: Richard Henderson <rth@twiddle.net> Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
2012-11-15target-mips: fix wrong microMIPS opcode encoding陳韋任 (Wei-Ren Chen)
While reading microMIPS decoding, I found a possible wrong opcode encoding. According to [1] page 166, the bits 13..12 for MULTU is 0x01 rather than 0x00. Please review, thanks. [1] MIPS Architecture for Programmers VolumeIV-e: The MIPS DSP Application-Specific Extension to the microMIPS32 Architecture Signed-off-by: Chen Wei-Ren <chenwj@iis.sinica.edu.tw> Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2012-11-11target-mips: Fix seg fault for LUI when MIPS_DEBUG_DISAS==1.Eric Johnson
The call to gen_logic_imm for OPC_LUI passes -1 for rs. This causes the MIPS_DEBUG statement to seg fault due to the deference of regnames[rs]. This patch fixes that. Signed-off-by: Eric Johnson <ericj@mips.com> Signed-off-by: Aurelien Jarno <aurelien@aurel32.net> (aurel32: replaced static string formating by a static string)
2012-11-10disas: avoid using cpu_single_envBlue Swirl
Pass around CPUArchState instead of using global cpu_single_env. Signed-off-by: Blue Swirl <blauwirbel@gmail.com> Acked-by: Richard Henderson <rth@twiddle.net> Acked-by: Aurelien Jarno <aurelien@aurel32.net> Acked-by: Guan Xuetao <gxt@mprc.pku.edu.cn>
2012-10-31target-mips: use deposit instead of hardcoded versionAurelien Jarno
Use the deposit op instead of and hardcoded bit field insertion. It allows the host to emit the corresponding instruction if available. At the same time remove the (lsb > msb) test. The MIPS64R2 instruction set manual says "Because of the instruction format, lsb can never be greater than msb, so there is no UNPREDICATABLE case for this instruction." (Bug reported as LP:1071149.) Cc: Никита Канунников <n.kanunnikov@sbtcom.ru> Reviewed-by: Richard Henderson <rth@twiddle.net> Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2012-10-31target-mips: optimize ddiv/ddivu/div/divu with movcondAurelien Jarno
The result of a division by 0, or a division of INT_MIN by -1 in the signed case, is unpredictable. Just replace 0 by 1 in that case so that it doesn't trigger a floating point exception on the host. Reviewed-by: Richard Henderson <rth@twiddle.net> Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2012-10-31target-mips: implement movn/movz using movcondAurelien Jarno
Avoid the branches in movn/movz implementation and replace them with movcond. Also update a wrong command. Reviewed-by: Richard Henderson <rth@twiddle.net> Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2012-10-31target-mips: don't use local temps for store conditionalAurelien Jarno
Store conditional operations only need local temps in user mode. Fix the code to use temp local only in user mode, this spares two memory stores in system mode. At the same time remove a wrong a wrong copied & pasted comment, store operations don't have a register destination. Reviewed-by: Richard Henderson <rth@twiddle.net> Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2012-10-31target-mips: implement unaligned loads using TCGAurelien Jarno
Load/store from helpers should be avoided as they are quite inefficient. Rewrite unaligned loads instructions using TCG and aligned loads. The number of actual loads operations to implement an unaligned load instruction is reduced from up to 8 to 1. Note: As we can't rely on shift by 32 or 64 undefined behaviour, the code loads already shift by one constants. Reviewed-by: Richard Henderson <rth@twiddle.net> Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2012-10-31target-mips: optimize load operationsAurelien Jarno
Only allocate t1 when needed. Reviewed-by: Richard Henderson <rth@twiddle.net> Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2012-10-31target-mips: cleanup load/store operationsAurelien Jarno
Load/store operations use macros for historical reasons. Now that there is no point in keeping them, replace them by direct calls to qemu_ld/st. Reviewed-by: Richard Henderson <rth@twiddle.net> Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2012-10-31target-mips: use the softfloat floatXX_muladd functionsAurelien Jarno
Use the new softfloat floatXX_muladd() functions to implement the madd, msub, nmadd and nmsub instructions. At the same time replace the name of the helpers by the name of the instruction, as the only reason for the previous names was to keep the macros simple. Reviewed-by: Richard Henderson <rth@twiddle.net> Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2012-10-31target-mips: do not save CPU state when using retranslationAurelien Jarno
When the CPU state after a possible retranslation is going to be handled through code retranslation, we don't need to save the CPU state before. Reviewed-by: Richard Henderson <rth@twiddle.net> Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2012-10-31target-mips: correctly restore btarget upon exceptionAurelien Jarno
When the CPU state is restored through retranslation after an exception, btarget should also be restored. Reviewed-by: Richard Henderson <rth@twiddle.net> Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2012-10-31target-mips: remove #if defined(TARGET_MIPS64) in opcode enumsAurelien Jarno
All switch() decoding instruction have a default entry, so it is possible to have unused enum entries. Remove conditional definitions of MIPS64 opcode enums, as it only makes the code less readable. Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2012-10-31target-mips: Add ASE DSP accumulator instructionsJia Liu
Add MIPS ASE DSP Accumulator and DSPControl Access instructions. Signed-off-by: Jia Liu <proljc@gmail.com> Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2012-10-31target-mips: Add ASE DSP compare-pick instructionsJia Liu
Add MIPS ASE DSP Compare-Pick instructions. Signed-off-by: Jia Liu <proljc@gmail.com> Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2012-10-31target-mips: Add ASE DSP bit/manipulation instructionsJia Liu
Add MIPS ASE DSP Bit/Manipulation instructions. Signed-off-by: Jia Liu <proljc@gmail.com> Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2012-10-31target-mips: Add ASE DSP multiply instructionsJia Liu
Add MIPS ASE DSP Multiply instructions. Signed-off-by: Jia Liu <proljc@gmail.com> Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2012-10-31target-mips: Add ASE DSP GPR-based shift instructionsJia Liu
Add MIPS ASE DSP GPR-Based Shift instructions. Signed-off-by: Jia Liu <proljc@gmail.com> Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2012-10-31target-mips: Add ASE DSP arithmetic instructionsJia Liu
Add MIPS ASE DSP Arithmetic instructions. Signed-off-by: Jia Liu <proljc@gmail.com> Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2012-10-31target-mips: Add ASE DSP load instructionsJia Liu
Add MIPS ASE DSP Load instructions. Signed-off-by: Jia Liu <proljc@gmail.com> Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2012-10-31target-mips: Add ASE DSP branch instructionsJia Liu
Add MIPS ASE DSP Branch instructions. Signed-off-by: Jia Liu <proljc@gmail.com> Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2012-10-31Use correct acc value to index cpu_HI/cpu_LO rather than using a fix numberJia Liu
Signed-off-by: Jia Liu <proljc@gmail.com> Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2012-10-31target-mips: Add ASE DSP resources access checkJia Liu
Add MIPS ASE DSP resources access check. Signed-off-by: Jia Liu <proljc@gmail.com> Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2012-10-28target-mips: Use TCG registers for the FPU.Richard Henderson
With normal FP, this doesn't have much affect on the generated code, because most of the FP operations are not CONST/PURE, and so we spill registers in about the same frequency as the explicit load/stores. But with Loongson multimedia instructions, which are all integral and whose helpers are in fact CONST+PURE, this greatly improves the code. Signed-off-by: Richard Henderson <rth@twiddle.net> Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2012-09-27Emit debug_insn for CPU_LOG_TB_OP_OPT as well.Richard Henderson
For all targets that currently call tcg_gen_debug_insn_start, add CPU_LOG_TB_OP_OPT to the condition that gates it. This is useful for comparing optimization dumps, when the pre-optimization dump is merely noise. Signed-off-by: Richard Henderson <rth@twiddle.net> Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2012-09-19target-mips: Implement Loongson Multimedia InstructionsRichard Henderson
Implements all of the COP2 instructions except for the S<cond> family of comparisons. The documentation is unclear for those. Signed-off-by: Richard Henderson <rth@twiddle.net> Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2012-09-19target-mips: Always evaluate debugging macro argumentsRichard Henderson
this will prevent some of the compilation errors with debugging enabled from creeping back in. Signed-off-by: Richard Henderson <rth@twiddle.net> Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2012-09-19target-mips: Fix MIPS_DEBUG.Richard Henderson
The macro uses the DisasContext. Pass it around as needed. Signed-off-by: Richard Henderson <rth@twiddle.net> Acked-by: Aurelien Jarno <aurelien@aurel32.net> Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2012-09-19target-mips: Set opn in gen_ldst_multiple.Richard Henderson
Used by MIPS_DEBUG, when enabled. Signed-off-by: Richard Henderson <rth@twiddle.net> Acked-by: Aurelien Jarno <aurelien@aurel32.net> Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2012-09-15target-mips: switch to AREG0 free modeBlue Swirl
Add an explicit CPUState parameter instead of relying on AREG0 and switch to AREG0 free mode. Signed-off-by: Blue Swirl <blauwirbel@gmail.com> Acked-by: Aurelien Jarno <aurelien@aurel32.net>
2012-09-08MIPS/user: Fix reset CPU state initializationMaciej W. Rozycki
This change updates the CPU reset sequence to use a common piece of code that figures out CPU state flags, fixing the problem with MIPS_HFLAG_COP1X not being set where applicable that causes floating-point MADD family instructions (and other instructions from the MIPS IV FP subset) to trap. As compute_hflags is now shared between op_helper.c and translate.c, the function is now moved to a common header. There are no changes to this function. The problem was seen with the 24Kf MIPS32r2 processor in user emulation. The new approach prevents system and user emulation from diverging -- all the hflags state is initialized in one place now. Signed-off-by: Maciej W. Rozycki <macro@codesourcery.com> Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2012-08-27target-mips: allow microMIPS SWP and SDP to have RD equal to BASEEric Johnson
The microMIPS SWP and SDP instructions do not modify GPRs. So their behavior is well defined when RD equals BASE. The MIPS Architecture Verification Programs (AVPs) check that they work as expected. This is required for AVPs to pass. Signed-off-by: Eric Johnson <ericj@mips.com> Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2012-08-27target-mips: add privilege level check to several Cop0 instructionsEric Johnson
The MIPS Architecture Verification Programs (AVPs) check privileged instructions for the required privilege level. These changes are needed to pass the AVP suite. Signed-off-by: Eric Johnson <ericj@mips.com> Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2012-08-27mips-linux-user: Always support rdhwr.Richard Henderson
The kernel will emulate this instruction if it's not supported natively. This insn is used for TLS, among other things, and so is required by modern glibc. Signed-off-by: Richard Henderson <rth@twiddle.net> Cc: Riku Voipio <riku.voipio@iki.fi> Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2012-08-27target-mips: Streamline indexed cp1 memory addressing.Richard Henderson
We've already eliminated both base and index being zero. Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2012-08-27Fix order of CVT.PS.S operandsRichard Sandiford
The FS input to CVT.PS.S is the high half and FT is the low half. tcg_gen_concat_i32_i64 takes the low half first, so the operands were in the wrong order. Signed-off-by: Richard Sandiford <rdsandiford@googlemail.com> Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2012-08-27Fix operands of RECIP2.S and RECIP2.PSRichard Sandiford
Read the second input operand of RECIP2.S and RECIP2.PS from FT rather than FD. RECIP2.D is already correct. Signed-off-by: Richard Sandiford <rdsandiford@googlemail.com> Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2012-08-23target-mips: Enable access to required RDHWR hardware registersMeador Inge
While running in the usermode emulator all of the required* MIPS32r2 RDHWR hardware registers should be accessible (the Linux kernel enables access to these same registers). Note that these registers are still enabled when the MIPS ISA is not release 2. This is OK since the Linux kernel emulates access to them when they are not available in hardware. * There is also the ULR register which is only recommended for full release 2 compliance. Incidentally, accessing this register in the current implementation works fine without flipping its access bit. Signed-off-by: Meador Inge <meadori@codesourcery.com> Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2012-08-09MIPS: Correct FCR0 initializationNathan Froyd
This change addresses a problem where QEMU incorrectly traps on floating-point MADD group instructions with SIGILL, at least while emulating MIPS32r2 processors. These instructions use the COP1X major opcode and include ones like: madd.d $f2,$f4,$f2,$f6 Here's Nathan's original analysis of the problem: "QEMU essentially does: d = find_cpu (cpu_string) // get CPU definition fpu_init (env, d) // initialize fpu state (init FCR0, basically) cpu_reset (env) ...and the cpu_reset call clears all interesting state that fpu_init setup, then proceeds to reinitialize all the CP0 registers...but not FCR0." I have verified this change with system emulation running the GDB test suite for the mips-sde-elf target (o32, big endian, 24Kf CPU emulated), there were 55 progressions and no regressions. Signed-off-by: Maciej W. Rozycki <macro@codesourcery.com> Reviewed-by: Richard Henderson <rth@twiddle.net> Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
2012-06-04target-mips: Let cpu_mips_init() return MIPSCPUAndreas Färber
Turn cpu_init macro into a static inline function returning CPUMIPSState for backwards compatibility. Signed-off-by: Andreas Färber <afaerber@suse.de>
2012-06-04target-mips: Use cpu_reset() in cpu_mips_init()Andreas Färber
Commit 0f71a7095db6bc055bc5bb520d85ea650cca8a33 (target-mips: QOM'ify CPU) hooked up cpu_state_reset() to CPUClass::reset(). Dropping the introduction of subclasses for 1.1, due to mips_def_t the reset code could not be QOM'ified yet, i.e. cpu_state_reset() will not forward to CPUClass::reset(). Update cpu_mips_init() with cpu_reset() nontheless, indirectly calling cpu_state_reset(), so that generic code can be converted to call cpu_reset(). Signed-off-by: Andreas Färber <afaerber@suse.de>
2012-05-19mips: Fix BC1ANY[24]F instructionsRichard Sandiford
There's some dodgy application of De Morgan's law in the emulation of the MIPS BC1ANY[24]F instructions: they end up branching only if all CCs are false, rather than if one CC is. Tested on mips64-linux-gnu, where it fixes the GCC MIPS3D tests. Signed-off-by: Richard Sandiford <rdsandiford@googlemail.com> Reviewed-by: Richard Henderson <rth@twiddle.net> Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
2012-04-30target-mips: Start QOM'ifying CPU initAndreas Färber
Move code not dependent on mips_def_t from cpu_mips_init() into a QOM initfn, as a start. Signed-off-by: Andreas Färber <afaerber@suse.de> Reviewed-by: Richard Henderson <rth@twiddle.net>
2012-04-30target-mips: QOM'ify CPUAndreas Färber
Embed CPUMIPSState as first member of QOM MIPSCPU. Let CPUClass::reset() call cpu_state_reset() for now. Signed-off-by: Andreas Färber <afaerber@suse.de> Reviewed-by: Richard Henderson <rth@twiddle.net>
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