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2013-02-23target-mips: fix for sign-issue in MULQ_W helperPetar Jovanovic
Correct sign-propagation before multiplication in MULQ_W helper. The change also fixes previously incorrect expected values in the tests for MULQ_RS.W and MULQ_S.W. Signed-off-by: Petar Jovanovic <petarj@mips.com> Richard Henderson <rth@twiddle.net> Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2013-02-23target-mips: fix for incorrect multiplication with MULQ_S.PHPetar Jovanovic
The change corrects sign-related issue with MULQ_S.PH. It also includes extension to the already existing test which will trigger the issue. Signed-off-by: Petar Jovanovic <petarj@mips.com> Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2013-02-23target-mips: Use mul[us]2 in [D]MULT[U] insnsRichard Henderson
Cc: Aurelien Jarno <aurelien@aurel32.net> Signed-off-by: Richard Henderson <rth@twiddle.net> Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
2013-02-16cpu: Add CPUArchState pointer to CPUStateAndreas Färber
The target-specific ENV_GET_CPU() macros have allowed us to navigate from CPUArchState to CPUState. The reverse direction was not supported. Avoid introducing CPU_GET_ENV() macros by initializing an untyped pointer that is initialized in derived instance_init functions. The field may not be called "env" due to it being poisoned. Acked-by: Richard Henderson <rth@twiddle.net> Signed-off-by: Andreas Färber <afaerber@suse.de>
2013-02-16target-mips: Move TCG initialization to MIPSCPU initfnAndreas Färber
Make mips_tcg_init() non-static and add tcg_enabled() check to suppress it for qtest. Signed-off-by: Andreas Färber <afaerber@suse.de>
2013-02-16target-mips: Introduce QOM realizefn for MIPSCPUAndreas Färber
Introduce a realizefn and set realized = true from cpu_mips_init(). Signed-off-by: Andreas Färber <afaerber@suse.de>
2013-01-31target-mips: enable access to DSP ASE if implementedPetar Jovanovic
compute_hflags() will reset DSP h-flags, so MX bit should be initially set for usermode in cpu_state_reset() if DSP ASE is implemented. This change will bring back user-mode support for DSP ASE, since one of the recent changes broke it. Signed-off-by: Petar Jovanovic <petarj@mips.com> Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2013-01-31target-mips: Unfuse {,N}M{ADD,SUB}.fmtRichard Sandiford
Turn MADD.fmt, MSUB.fmt, NMADD.fmt and NMSUB.fmt from fused to unfused operations, so that they behave in the same way as a separate multiplication and addition. The instructions were only fused in early MIPS IV processors. Signed-off-by: Richard Sandiford <rdsandiford@googlemail.com> Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2013-01-31target-mips: Sign-extend the result of LWRRichard Sandiford
Sign-extend the result of LWR, as is already done for LWL. This is necessary in the case where LWR loads the full word (i.e. the address is actually aligned). In the other cases, it is implementation defined whether the upper 32 bits of the result are unchanged or a copy of bit 31. The latter seems easier to implement. Previously the code used: (oldval & (0xfffffffe << (31 - bitshift))) | (newval >> bitshift) which zeroed the upper bits of the register, losing any previous sign extension in the unaligned cases. Signed-off-by: Richard Sandiford <rdsandiford@googlemail.com> Reviewed-by: Richard Henderson <rth@twiddle.net> Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2013-01-31target-mips: Fix signedness of loads in MIPS16 RESTOREsRichard Sandiford
Make RESTORE use sign-extending rather than zero-extending loads. Signed-off-by: Richard Sandiford <rdsandiford@googlemail.com> Reviewed-by: Richard Henderson <rth@twiddle.net> Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2013-01-31target-mips: implement DSP (d)append sub-class with TCGAurelien Jarno
DSP instruction from the (d)append sub-class can be implemented with TCG. Use a different function for these instructions are they are quite different from compare-pick sub-class. Fix BALIGN instruction for negative value, where the value should be zero-extended before being shift to the right. Reviewed-by: Richard Henderson <rth@twiddle.net> Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2013-01-31target-mips: use DSP unions for reduction add instructionsAurelien Jarno
Reviewed-by: Richard Henderson <rth@twiddle.net> Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2013-01-31target-mips: use DSP unions for unary DSP operatorsAurelien Jarno
This allow to reduce the number of macros. Reviewed-by: Richard Henderson <rth@twiddle.net> Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2013-01-31target-mips: use DSP unions for binary DSP operatorsAurelien Jarno
This allow to reduce the number of macros. Reviewed-by: Richard Henderson <rth@twiddle.net> Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2013-01-31target-mips: add unions to access DSP elementsAurelien Jarno
Instead of playing with bit shifting, add two unions (one for 32-bit values, one for 64-bit ones) to access all the DSP elements with the correct type. This make the code easier to read and less error prone, and allow GCC to vectorize the code in some cases. Reviewed-by: Eric Johnson <ericj@mips.com> Reviewed-by: Richard Henderson <rth@twiddle.net> Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2013-01-31target-mips: generate a reserved instruction exception on CPU without DSPAurelien Jarno
On CPU without DSP ASE support, a reserved instruction exception (instead of a DSP ASE sate disabled) should be generated. Reviewed-by: Richard Henderson <rth@twiddle.net> Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2013-01-31target-mips: copy insn_flags in DisasContextAurelien Jarno
Copy insn_flags in DisasContext to avoid passing a CPUMIPSState pointer to subroutines, as suggested by Richard Henderson. Change subroutines to use this new field and remove the first argument. Reviewed-by: Richard Henderson <rth@twiddle.net> Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2013-01-31target-mips: fix DSP loads with rd = 0Aurelien Jarno
When rd is 0, which still need to do the actually load to possibly generate a TLB exception. Reviewed-by: Eric Johnson <ericj@mips.com> Reviewed-by: Richard Henderson <rth@twiddle.net> Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2013-01-15exec: Return CPUState from qemu_get_cpu()Andreas Färber
Move the declaration to qemu/cpu.h and add documentation. The implementation still depends on CPUArchState for CPU iteration. Signed-off-by: Andreas Färber <afaerber@suse.de>
2013-01-15cpu: Move cpu_index field to CPUStateAndreas Färber
Note that target-alpha accesses this field from TCG, now using a negative offset. Therefore the field is placed last in CPUState. Pass PowerPCCPU to [kvm]ppc_fixup_cpu() to facilitate this change. Move common parts of mips cpu_state_reset() to mips_cpu_reset(). Acked-by: Richard Henderson <rth@twiddle.net> (for alpha) [AF: Rebased onto ppc CPU subclasses and openpic changes] Signed-off-by: Andreas Färber <afaerber@suse.de>
2013-01-15target-mips: Clean up mips_cpu_map_tc() documentationAndreas Färber
This function will be touched again soon, so a good understanding of env vs. other helps. Adopt gtk-doc style. Signed-off-by: Andreas Färber <afaerber@suse.de> Reviewed-by: Eric Johnson <ericj@mips.com>
2013-01-15cpu: Move nr_{cores,threads} fields to CPUStateAndreas Färber
To facilitate the field movements, pass MIPSCPU to malta_mips_config(); avoid that for mips_cpu_map_tc() since callers only access MIPS Thread Contexts, inside TCG helpers. Signed-off-by: Andreas Färber <afaerber@suse.de>
2013-01-08target-mips: Fix helper and tests for dot/cross-dot product instructionsPetar Jovanovic
Helper function for dpa_w_ph, dpax_w_ph, dps_w_ph and dpsx_w_ph incorrectly defines halfword vector elements as unsigned values. This results in wrong output which is not triggered in the tests as they also follow this logic. Signed-off-by: Petar Jovanovic <petarj@mips.com> Reviewed-by: Eric Johnson <ericj@mips.com> Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2013-01-08target-mips: Replace macros by inline functionsStefan Weil
The macros RESTORE_ROUNDING_MODE and RESTORE_FLUSH_MODE silently used variable env from their callers. Using inline functions with env passed as a function argument is more transparent. This modification was proposed by Peter Maydell. Cc: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Stefan Weil <sw@weilnetz.de> Reviewed-by: Eric Johnson <ericj@mips.com> Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2013-01-08target-mips: Allow DSP access to be disabled once enabled.Eric Johnson
Clear the DSP hflags at the start of compute_hflags. Otherwise access is not properly disabled once enabled. Signed-off-by: Eric Johnson <ericj@mips.com> Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2013-01-01target-mips: Use EXCP_SC rather than a magic number陳韋任 (Wei-Ren Chen)
From the discussion on the ML [1], the exception limit defined by magic number 0x100 is actually EXCP_SC defined in cpu.h. Replace the magic number with EXCP_SC. Remove "#if 1 .. #endif" as well. [1] http://lists.gnu.org/archive/html/qemu-devel/2012-11/msg03080.html Signed-off-by: Chen Wei-Ren <chenwj@iis.sinica.edu.tw> Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2013-01-01target-mips: Make repl_ph to sign extend to target-longJovanovic, Petar
The immediate value is 9bits, should sign-extend to 16bits. The return value to register should sign-extend to target_long, as Richard says, removing an unnecessary cast works fun. Signed-off-by: Dongxue Zhang <elta.era@gmail.com> Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2013-01-01Fix my email addressDongxue Zhang
Fix my email address, last time it's wrong. Signed-off-by: Dongxue Zhang <elta.era@gmail.com> Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2013-01-01target-mips: Remove semicolon from macro definitionStefan Weil
Macro RESTORE_FLUSH_MODE is similar to RESTORE_ROUNDING_MODE but included a semicolon. The code which uses that macro also includes a semicolon, so the result was an empty statement. Remove the superfluous semicolon from the macro definition. Signed-off-by: Stefan Weil <sw@weilnetz.de> Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2013-01-01target-mips: Fix for helpers for EXTR_* instructionsPetar Jovanovic
The change removes some unnecessary and incorrect code for EXTR_S.H. Further, it corrects the mask for shift value in the EXTR_ instructions. It also extends the existing tests so they trigger the issues corrected with the change. Signed-off-by: Petar Jovanovic <petarj@mips.com> Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2013-01-01target-mips: Fix incorrect reads and writes to DSPControl registerPetar Jovanovic
Upper 4 bits of ccond (bits 31..28 ) of DSPControl register are not used in the MIPS32 architecture. They are used in the MIPS64 architecture. For MIPS32 these bits must be written as zero, and return zero on read. The change fixes writes (WRDSP) and reads (RDDSP) to the register. It also fixes the tests that use these instructions, and makes them smaller and simpler. Signed-off-by: Petar Jovanovic <petarj@mips.com> Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2012-12-19fpu: move public header file to include/fpuPaolo Bonzini
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2012-12-19misc: move include files to include/qemu/Paolo Bonzini
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2012-12-19qom: move include files to include/qom/Paolo Bonzini
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2012-12-19exec: move include files to include/exec/Paolo Bonzini
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2012-12-19build: kill libdis, move disassemblers to disas/Paolo Bonzini
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2012-12-16exec: refactor cpu_restore_stateBlue Swirl
Refactor common code around calls to cpu_restore_state(). tb_find_pc() has now no external users, make it static. Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
2012-12-08Merge branch 'master' of git.qemu-project.org:/pub/git/qemuBlue Swirl
* 'master' of git.qemu-project.org:/pub/git/qemu: target-mips: Fix incorrect shift for SHILO and SHILOV target-mips: Fix incorrect code and test for INSV xilinx_uartlite: Accept input after rx FIFO pop xilinx_uartlite: suppress "cannot receive message" xilinx_axienet: Implement R_IS behaviour
2012-12-08TCG: Use gen_opc_instr_start from context instead of global variable.Evgeny Voevodin
Signed-off-by: Evgeny Voevodin <e.voevodin@samsung.com> Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
2012-12-08TCG: Use gen_opc_icount from context instead of global variable.Evgeny Voevodin
Signed-off-by: Evgeny Voevodin <e.voevodin@samsung.com> Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
2012-12-08TCG: Use gen_opc_pc from context instead of global variable.Evgeny Voevodin
Signed-off-by: Evgeny Voevodin <e.voevodin@samsung.com> Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
2012-12-06target-mips: Fix incorrect shift for SHILO and SHILOVPetar Jovanovic
helper_shilo has not been shifting an accumulator value correctly for negative values in 'shift' field. Minor optimization for shift=0 case. This change also adds tests that will trigger issue and check for regressions. Signed-off-by: Petar Jovanovic <petarj@mips.com> Reviewed-by: Richard Henderson <rth@twiddle.net> Reviewed-by: Eric Johnson <ericj@mips.com> Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2012-12-06target-mips: Fix incorrect code and test for INSVPetar Jovanovic
Content of register rs should be shifted for pos before applying a mask. This change contains both fix for the instruction and to the existing test. Signed-off-by: Petar Jovanovic <petarj@mips.com> Reviewed-by: Eric Johnson <ericj@mips.com> Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
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)
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