summaryrefslogtreecommitdiff
path: root/target-mips/translate.c
AgeCommit message (Collapse)AuthorFilesLines
2015-10-30target-mips: add SIGRIE instructionYongbok Kim1-1/+11
Add SIGRIE (Signal Reserved Instruction Exception) for both MIPS and microMIPS. The instruction allows to use the 16-bit code field for software use. This instruction is introduced by and required as of Release 6. Signed-off-by: Yongbok Kim <yongbok.kim@imgtec.com> Reviewed-by: Leon Alrae <leon.alrae@imgtec.com> Signed-off-by: Leon Alrae <leon.alrae@imgtec.com>
2015-10-30target-mips: add PC, XNP reg numbers to RDHWRYongbok Kim1-3/+25
Add Performance Counter (4) and XNP (5) register numbers to RDHWR. Add check_hwrena() to simplify access control checkings. Add RDHWR support to microMIPS R6. Signed-off-by: Yongbok Kim <yongbok.kim@imgtec.com> Reviewed-by: Leon Alrae <leon.alrae@imgtec.com> Signed-off-by: Leon Alrae <leon.alrae@imgtec.com>
2015-10-29target-mips: Add enum for BREAK32Yongbok Kim1-1/+2
Add enum for BREAK32 Signed-off-by: Yongbok Kim <yongbok.kim@imgtec.com> Reviewed-by: Leon Alrae <leon.alrae@imgtec.com> Reviewed-by: Aurelien Jarno <aurelien@aurel32.net> Signed-off-by: Leon Alrae <leon.alrae@imgtec.com>
2015-10-28target-*: Advance pc after recognizing a breakpointRichard Henderson1-2/+4
Some targets already had this within their logic, but make sure it's present for all targets. Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Richard Henderson <rth@twiddle.net>
2015-10-07tcg: Remove gen_intermediate_code_pcRichard Henderson1-43/+5
It is no longer used, so tidy up everything reached by it. This includes the gen_opc_* arrays, the search_pc parameter and the inline gen_intermediate_code_internal functions. 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: Pass data argument to restore_state_to_opcRichard Henderson1-4/+5
The gen_opc_* arrays are already redundant with the data stored in the insn_start arguments. Transition restore_state_to_opc to use data from the latter. 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: Add TCG_MAX_INSNSRichard Henderson1-1/+6
Adjust all translators to respect it. Reviewed-by: Aurelien Jarno <aurelien@aurel32.net> Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Richard Henderson <rth@twiddle.net>
2015-10-07target-mips: Add delayed branch state to insn_startRichard Henderson1-1/+2
Reviewed-by: Aurelien Jarno <aurelien@aurel32.net> Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Richard Henderson <rth@twiddle.net>
2015-10-07target-*: Introduce and use cpu_breakpoint_testRichard Henderson1-15/+10
Reduce the boilerplate required for each target. At the same time, move the test for breakpoint after calling tcg_gen_insn_start. Note that arm and aarch64 do not use cpu_breakpoint_test, but still move the inline test down after tcg_gen_insn_start. Reviewed-by: Aurelien Jarno <aurelien@aurel32.net> Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Richard Henderson <rth@twiddle.net>
2015-10-07target-*: Increment num_insns immediately after tcg_gen_insn_startRichard Henderson1-3/+2
This does tidy the icount test common to all targets. Reviewed-by: Aurelien Jarno <aurelien@aurel32.net> Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Richard Henderson <rth@twiddle.net>
2015-10-07target-*: Unconditionally emit tcg_gen_insn_startRichard Henderson1-5/+4
While we're at it, emit the opcode adjacent to where we currently record data for search_pc. This puts gen_io_start et al on the "correct" side of the marker. 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 Henderson1-1/+1
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>
2015-09-18target-mips: improve exception handlingPavel Dovgaluk1-191/+174
This patch improves exception handling in MIPS. Instructions generate several types of exceptions. When exception is generated, it breaks the execution of the current translation block. Implementation of the exceptions handling does not correctly restore icount for the instruction which caused the exception. In most cases icount will be decreased by the value equal to the size of TB. This patch passes pointer to the translation block internals to the exception handler. It allows correct restoring of the icount value. Signed-off-by: Pavel Dovgalyuk <pavel.dovgaluk@ispras.ru> Reviewed-by: Aurelien Jarno <aurelien@aurel32.net> Reviewed-by: Leon Alrae <leon.alrae@imgtec.com> [leon.alrae@imgtec.com: avoid retranslation in linux-user SC, break lines which are over 80 chars, remove v3 changelog from the commit message] Signed-off-by: Leon Alrae <leon.alrae@imgtec.com>
2015-09-18target-mips: correct MTC0 instruction on MIPS64Leon Alrae1-11/+7
MTC0 on a 64-bit processor should move entire 64-bit GPR content to CP0 register. Signed-off-by: Leon Alrae <leon.alrae@imgtec.com> Reviewed-by: Aurelien Jarno <aurelien@aurel32.net>
2015-09-18target-mips: add missing restriction in DAUI instructionLeon Alrae1-1/+3
rs cannot be the zero register, Reserved Instruction exception must be signalled for this case. Signed-off-by: Leon Alrae <leon.alrae@imgtec.com> Reviewed-by: Aurelien Jarno <aurelien@aurel32.net>
2015-09-18target-mips: get rid of MIPS_DEBUG_SIGN_EXTENSIONSAurelien Jarno1-39/+0
MIPS_DEBUG_SIGN_EXTENSIONS was used sometimes ago to verify that 32-bit instructions correctly sign extend their results. It's now not need anymore, remove it. Cc: Leon Alrae <leon.alrae@imgtec.com> Signed-off-by: Aurelien Jarno <aurelien@aurel32.net> Reviewed-by: Leon Alrae <leon.alrae@imgtec.com> Signed-off-by: Leon Alrae <leon.alrae@imgtec.com>
2015-09-18target-mips: get rid of MIPS_DEBUGAurelien Jarno1-605/+19
MIPS_DEBUG is a define used to dump the instruction disassembling. It has to be defined at compile time. In practice I believe it's more efficient to just look at the instruction disassembly and op dump using -d in_asm,op. This patch therefore removes the corresponding code, which clutters translate.c. Cc: Leon Alrae <leon.alrae@imgtec.com> Signed-off-by: Aurelien Jarno <aurelien@aurel32.net> Reviewed-by: Leon Alrae <leon.alrae@imgtec.com> Signed-off-by: Leon Alrae <leon.alrae@imgtec.com>
2015-09-18target-mips: remove wrong checks for recip.fmt and rsqrt.fmtPetar Jovanovic1-4/+2
Instructions recip.{s|d} and rsqrt.{s|d} do not require 64-bit FPU neither they require any particular mode for its FPU. This patch removes the checks that may break a program that uses these instructions. Signed-off-by: Petar Jovanovic <petar.jovanovic@imgtec.com> Reviewed-by: Leon Alrae <leon.alrae@imgtec.com> Signed-off-by: Leon Alrae <leon.alrae@imgtec.com>
2015-09-18target-mips: Use tcg_gen_extrh_i64_i32Richard Henderson1-26/+22
We can tidy gen_load_fpr32h, as well as introduce a helper to cleanup the MACC instructions. Signed-off-by: Richard Henderson <rth@twiddle.net> Reviewed-by: Leon Alrae <leon.alrae@imgtec.com> Signed-off-by: Leon Alrae <leon.alrae@imgtec.com>
2015-08-24tcg: Remove tcg_gen_trunc_i64_i32Richard Henderson1-2/+2
Replacing it with tcg_gen_extrl_i64_i32. Signed-off-by: Richard Henderson <rth@twiddle.net>
2015-08-13target-mips: simplify LWL/LDL mask generationAurelien Jarno1-8/+6
The LWL/LDL instructions mask the GPR with a mask depending on the address alignement. It is currently computed by doing: mask = 0x7fffffffffffffffull >> (t1 ^ 63) It's simpler to generate it by doing: mask = ~(-1 << t1) It uses one TCG instruction less, and it avoids a 32/64-bit constant loading which can take a few instructions on RISC hosts. Cc: Leon Alrae <leon.alrae@imgtec.com> Signed-off-by: Aurelien Jarno <aurelien@aurel32.net> Reviewed-by: Richard Henderson <rth@twiddle.net> Reviewed-by: Leon Alrae <leon.alrae@imgtec.com> Signed-off-by: Leon Alrae <leon.alrae@imgtec.com>
2015-08-04target-mips: Copy restrictions from ext/ins to dext/dinsRichard Henderson1-20/+25
The checks in dins is required to avoid triggering an assertion in tcg_gen_deposit_tl. The check in dext is just for completeness. Fold the other D cases in via fallthru. In this case the errant dins appears to be data, not code, as translation failed to stop after a break insn. Signed-off-by: Richard Henderson <rth@twiddle.net> Reviewed-by: Aurelien Jarno <aurelien@aurel32.net> Reviewed-by: Leon Alrae <leon.alrae@imgtec.com> Signed-off-by: Leon Alrae <leon.alrae@imgtec.com>
2015-08-04target-mips: fix semihosting for microMIPS R6Leon Alrae1-3/+7
In semihosting mode the SDBBP 1 instructions should trigger UHI syscall, but in QEMU this does not happen for recently added microMIPS R6. Consequently bare metal microMIPS R6 programs supporting UHI will not run. Signed-off-by: Leon Alrae <leon.alrae@imgtec.com> Reviewed-by: Aurelien Jarno <aurelien@aurel32.net>
2015-07-15target-mips: fix page fault address for LWL/LWR/LDL/LDRAurelien Jarno1-0/+12
When a LWL, LWR, LDL or LDR instruction triggers a page fault, QEMU currently reports the aligned address in CP0 BadVAddr, while the Windows NT kernel expects the unaligned address. This patch adds a byte access with the unaligned address at the beginning of the LWL/LWR/LDL/LDR instructions to possibly trigger a page fault and fill the QEMU TLB. Cc: Leon Alrae <leon.alrae@imgtec.com> Reported-by: Hervé Poussineau <hpoussin@reactos.org> Tested-by: Hervé Poussineau <hpoussin@reactos.org> Signed-off-by: Aurelien Jarno <aurelien@aurel32.net> Signed-off-by: Leon Alrae <leon.alrae@imgtec.com>
2015-07-15target-mips: fix logically dead code reported by CoverityLeon Alrae1-0/+3
Make use of CMPOP in floating-point compare instructions. Signed-off-by: Leon Alrae <leon.alrae@imgtec.com> Reviewed-by: Aurelien Jarno <aurelien@aurel32.net>
2015-06-26target-mips: microMIPS32 R6 POOL16{A, C} instructionsYongbok Kim1-15/+118
microMIPS32 Release 6 POOL16A/ POOL16C instructions Signed-off-by: Yongbok Kim <yongbok.kim@imgtec.com> Reviewed-by: Leon Alrae <leon.alrae@imgtec.com> Reviewed-by: Aurelien Jarno <aurelien@aurel32.net> Signed-off-by: Leon Alrae <leon.alrae@imgtec.com>
2015-06-26target-mips: microMIPS32 R6 Major instructionsYongbok Kim1-17/+45
Add new microMIPS32 Release 6 Major opcode instructions Signed-off-by: Yongbok Kim <yongbok.kim@imgtec.com> Reviewed-by: Aurelien Jarno <aurelien@aurel32.net> Signed-off-by: Leon Alrae <leon.alrae@imgtec.com>
2015-06-26target-mips: microMIPS32 R6 POOL32{I, C} instructionsYongbok Kim1-6/+21
Add new microMIPS32 Release 6 POOL32I/POOL32C type instructions Signed-off-by: Yongbok Kim <yongbok.kim@imgtec.com> Reviewed-by: Leon Alrae <leon.alrae@imgtec.com> Reviewed-by: Aurelien Jarno <aurelien@aurel32.net> Signed-off-by: Leon Alrae <leon.alrae@imgtec.com>
2015-06-26target-mips: microMIPS32 R6 POOL32F instructionsYongbok Kim1-32/+199
Add new microMIPS32 Release 6 POOL32F instructions Signed-off-by: Yongbok Kim <yongbok.kim@imgtec.com> Reviewed-by: Leon Alrae <leon.alrae@imgtec.com> Reviewed-by: Aurelien Jarno <aurelien@aurel32.net> Signed-off-by: Leon Alrae <leon.alrae@imgtec.com>
2015-06-26target-mips: microMIPS32 R6 POOL32A{XF} instructionsYongbok Kim1-10/+72
Add new microMIPS32 Release 6 pool32a/pool32axf instructions. Signed-off-by: Yongbok Kim <yongbok.kim@imgtec.com> Reviewed-by: Leon Alrae <leon.alrae@imgtec.com> Reviewed-by: Aurelien Jarno <aurelien@aurel32.net> Signed-off-by: Leon Alrae <leon.alrae@imgtec.com>
2015-06-26target-mips: microMIPS32 R6 branches and jumpsYongbok Kim1-40/+202
Add new microMIPS32 Release 6 branch and jump instructions. Signed-off-by: Yongbok Kim <yongbok.kim@imgtec.com> Reviewed-by: Leon Alrae <leon.alrae@imgtec.com> Reviewed-by: Aurelien Jarno <aurelien@aurel32.net> Signed-off-by: Leon Alrae <leon.alrae@imgtec.com>
2015-06-26target-mips: add microMIPS32 R6 opcode enumYongbok Kim1-16/+103
Add microMIPS32 Release 6 opcode enum. Remove RI checking for pre-R6 reserved opcode. Signed-off-by: Yongbok Kim <yongbok.kim@imgtec.com> Reviewed-by: Aurelien Jarno <aurelien@aurel32.net> Signed-off-by: Leon Alrae <leon.alrae@imgtec.com>
2015-06-26target-mips: signal RI for removed instructions in microMIPS R6Yongbok Kim1-0/+68
Signal a Reserved Instruction exception for removed instruction encoding in microMIPS Release 6. Signed-off-by: Yongbok Kim <yongbok.kim@imgtec.com> Reviewed-by: Leon Alrae <leon.alrae@imgtec.com> Reviewed-by: Aurelien Jarno <aurelien@aurel32.net> Signed-off-by: Leon Alrae <leon.alrae@imgtec.com>
2015-06-26target-mips: raise RI exceptions when FIR.PS = 0Yongbok Kim1-33/+45
64-bit paired-single (PS) floating point data type is optional in the pre-Release 6. It has to raise RI exception when PS type is not implemented. (FIR.PS = 0) (The PS data type is removed in the Release 6.) Loongson-2E and Loongson-2F don't have any implementation field in FCSR0(FIR) but do support PS data format, therefore for these cores RI will not be signalled regardless of PS bit. Signed-off-by: Yongbok Kim <yongbok.kim@imgtec.com> Reviewed-by: Leon Alrae <leon.alrae@imgtec.com> Reviewed-by: Aurelien Jarno <aurelien@aurel32.net> Signed-off-by: Leon Alrae <leon.alrae@imgtec.com>
2015-06-26target-mips: rearrange gen_compute_compact_branchYongbok Kim1-236/+236
The function will be also used for microMIPS Release 6. Signed-off-by: Yongbok Kim <yongbok.kim@imgtec.com> Reviewed-by: Leon Alrae <leon.alrae@imgtec.com> Reviewed-by: Aurelien Jarno <aurelien@aurel32.net> Signed-off-by: Leon Alrae <leon.alrae@imgtec.com>
2015-06-26target-mips: refactor {D}LSA, {D}ALIGN, {D}BITSWAPYongbok Kim1-67/+99
Refactor those instructions in order to reuse them for microMIPS32 Release 6. Rearrange gen_move_low32(). Signed-off-by: Yongbok Kim <yongbok.kim@imgtec.com> Reviewed-by: Leon Alrae <leon.alrae@imgtec.com> Reviewed-by: Aurelien Jarno <aurelien@aurel32.net> Signed-off-by: Leon Alrae <leon.alrae@imgtec.com>
2015-06-26target-mips: remove an unused argumentYongbok Kim1-3/+2
Remove an unused argument from decode_micromips32_opc() Signed-off-by: Yongbok Kim <yongbok.kim@imgtec.com> Reviewed-by: Leon Alrae <leon.alrae@imgtec.com> Reviewed-by: Aurelien Jarno <aurelien@aurel32.net> Signed-off-by: Leon Alrae <leon.alrae@imgtec.com>
2015-06-26target-mips: add microMIPS TLBINV, TLBINVFYongbok Kim1-0/+8
Add microMIPS TLBINV, TLBINVF Signed-off-by: Yongbok Kim <yongbok.kim@imgtec.com> Reviewed-by: Aurelien Jarno <aurelien@aurel32.net> Reviewed-by: Leon Alrae <leon.alrae@imgtec.com> Signed-off-by: Leon Alrae <leon.alrae@imgtec.com>
2015-06-26target-mips: fix {RD, WR}PGPR in microMIPSYongbok Kim1-2/+2
rt, rs were swapped Signed-off-by: Yongbok Kim <yongbok.kim@imgtec.com> Reviewed-by: Aurelien Jarno <aurelien@aurel32.net> Reviewed-by: Leon Alrae <leon.alrae@imgtec.com> Signed-off-by: Leon Alrae <leon.alrae@imgtec.com>
2015-06-26target-mips: add Unified Hosting Interface (UHI) supportLeon Alrae1-20/+55
Add UHI semihosting support for MIPS. QEMU run with "-semihosting" option will alter the behaviour of SDBBP 1 instruction -- UHI operation will be called instead of generating a debug exception. Also tweak Malta's pseudo-bootloader. On CPU reset the $4 register is set to -1 if semihosting arguments are passed to indicate that the UHI operations should be used to obtain input arguments. Signed-off-by: Leon Alrae <leon.alrae@imgtec.com> Reviewed-by: Aurelien Jarno <aurelien@aurel32.net>
2015-06-26target-mips: remove identical code in different branchLeon Alrae1-21/+4
Signed-off-by: Leon Alrae <leon.alrae@imgtec.com> Reviewed-by: Aurelien Jarno <aurelien@aurel32.net>
2015-06-22disas: Remove uses of CPU envPeter Crosthwaite1-1/+1
disas does not need to access the CPU env for any reason. Change the APIs to accept CPU pointers instead. Small change pattern needs to be applied to all target translate.c. This brings us closer to making disas.o a common-obj and less architecture specific in general. Cc: Richard Henderson <rth@twiddle.net> Cc: Peter Maydell <peter.maydell@linaro.org> Cc: "Edgar E. Iglesias" <edgar.iglesias@gmail.com> Cc: Paolo Bonzini <pbonzini@redhat.com> Cc: Eduardo Habkost <ehabkost@redhat.com> Cc: Michael Walle <michael@walle.cc> Cc: Aurelien Jarno <aurelien@aurel32.net> Cc: Leon Alrae <leon.alrae@imgtec.com> Cc: Jia Liu <proljc@gmail.com> Cc: Alexander Graf <agraf@suse.de> Cc: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk> Cc: Bastian Koppelmann <kbastian@mail.uni-paderborn.de> Cc: Guan Xuetao <gxt@mprc.pku.edu.cn> Cc: Max Filippov <jcmvbkbc@gmail.com> Reviewed-by: Richard Henderson <rth@twiddle.net> Reviewed-by: Eduardo Habkost <ehabkost@redhat.com> Signed-off-by: Peter Crosthwaite <crosthwaite.peter@gmail.com> Acked-by: Luiz Capitulino <lcapitulino@redhat.com> Signed-off-by: Markus Armbruster <armbru@redhat.com>
2015-06-12target-mips: add MTHC0 and MFHC0 instructionsLeon Alrae1-0/+226
Implement MTHC0 and MFHC0 instructions. In MIPS32 they are used to access upper word of extended to 64-bits CP0 registers. In MIPS64, when CP0 destination register specified is the EntryLo0 or EntryLo1, bits 1:0 of the GPR appear at bits 31:30 of EntryLo0 or EntryLo1. This is to compensate for RI and XI, which were shifted to bits 63:62 by MTC0 to EntryLo0 or EntryLo1. Therefore creating separate functions for EntryLo0 and EntryLo1. Signed-off-by: Leon Alrae <leon.alrae@imgtec.com> Reviewed-by: Aurelien Jarno <aurelien@aurel32.net>
2015-06-12target-mips: add CP0.PageGrain.ELPA supportLeon Alrae1-1/+2
CP0.PageGrain.ELPA enables support for large physical addresses. This field is encoded as follows: 0: Large physical address support is disabled. 1: Large physical address support is enabled. If this bit is a 1, the following changes occur to coprocessor 0 registers: - The PFNX field of the EntryLo0 and EntryLo1 registers is writable and concatenated with the PFN field to form the full page frame number. - Access to optional COP0 registers with PA extension, LLAddr, TagLo is defined. P5600 can operate in 32-bit or 40-bit Physical Address Mode. Therefore if XPA is disabled (CP0.PageGrain.ELPA = 0) then assume 32-bit Address Mode. In MIPS64 assume 36 as default PABITS (when CP0.PageGrain.ELPA = 0). env->PABITS value is constant and indicates maximum PABITS available on a core, whereas env->PAMask is calculated from env->PABITS and is also affected by CP0.PageGrain.ELPA. Signed-off-by: Leon Alrae <leon.alrae@imgtec.com> Reviewed-by: Aurelien Jarno <aurelien@aurel32.net>
2015-06-12target-mips: extend selected CP0 registers to 64-bits in MIPS32Leon Alrae1-21/+42
Extend EntryLo0, EntryLo1, LLAddr and TagLo from 32 to 64 bits in MIPS32. Introduce gen_move_low32() function which moves low 32 bits from 64-bit temp to GPR; it sign extends 32-bit value on MIPS64 and truncates on MIPS32. Signed-off-by: Leon Alrae <leon.alrae@imgtec.com> Reviewed-by: Aurelien Jarno <aurelien@aurel32.net>
2015-06-12target-mips: correct MFC0 for CP0.EntryLo in MIPS64Leon Alrae1-6/+6
CP0.EntryLo bits 31:30 have to be cleared. Signed-off-by: Leon Alrae <leon.alrae@imgtec.com> Reviewed-by: Aurelien Jarno <aurelien@aurel32.net>
2015-06-11target-mips: add ERETNC instruction and Config5.LLB bitLeon Alrae1-5/+15
ERETNC is identical to ERET except that an ERETNC will not clear the LLbit that is set by execution of an LL instruction, and thus when placed between an LL and SC sequence, will never cause the SC to fail. Presence of ERETNC is denoted by the Config5.LLB. Signed-off-by: Leon Alrae <leon.alrae@imgtec.com> Reviewed-by: Aurelien Jarno <aurelien@aurel32.net>
2015-06-11target-mips: Misaligned memory accesses for MSAYongbok Kim1-10/+17
MIPS SIMD Architecture vector loads and stores require misalignment support. MSA Memory access should work as an atomic operation. Therefore, it has to check validity of all addresses for a vector store access if it is spanning into two pages. Separating helper functions for each data format as format is known in translation. To use mmu_idx from cpu_mmu_index() instead of calculating it from hflag. Removing save_cpu_state() call in translation because it is able to use cpu_restore_state() on fault as GETRA() is passed. Signed-off-by: Yongbok Kim <yongbok.kim@imgtec.com> Reviewed-by: Leon Alrae <leon.alrae@imgtec.com> [leon.alrae@imgtec.com: remove unused do_* functions] Signed-off-by: Leon Alrae <leon.alrae@imgtec.com>
2015-06-11target-mips: Misaligned memory accesses for R6Yongbok Kim1-12/+27
Release 6 requires misaligned memory access support for all ordinary memory access instructions (for example, LW/SW, LWC1/SWC1). However misaligned support is not provided for certain special memory accesses such as atomics (for example, LL/SC). Signed-off-by: Yongbok Kim <yongbok.kim@imgtec.com> Reviewed-by: Leon Alrae <leon.alrae@imgtec.com> Signed-off-by: Leon Alrae <leon.alrae@imgtec.com>
2015-06-11target-mips: add Config5.FRE support allowing Status.FR=0 emulationLeon Alrae1-150/+158
This relatively small architectural feature adds the following: FIR.FREP: Read-only. If FREP=1, then Config5.FRE and Config5.UFE are available. Config5.FRE: When enabled all single-precision FP arithmetic instructions, LWC1/LWXC1/MTC1, SWC1/SWXC1/MFC1 cause a Reserved Instructions exception. Config5.UFE: Allows user to write/read Config5.FRE using CTC1/CFC1 instructions. Enable the feature in MIPS64R6-generic CPU. Signed-off-by: Leon Alrae <leon.alrae@imgtec.com>
generated by cgit v1.2.1 (git 2.18.0) at 2024-07-06 22:51:47 +0000