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>
load/store microMIPS helpers are reinventing the wheel. Call do_lw,
do_ll, do_sw and do_sl instead of using a macro calling the cpu_*
load/store functions.
Reviewed-by: Richard Henderson <rth@twiddle.net>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
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>
Rework *raise_exception*() functions so that they can be called from
other helpers, passing the return address as an argument.
Use do_raise_exception() function in update_fcr31() to correctly restore
the CPU state after an FPU exception.
Reviewed-by: Richard Henderson <rth@twiddle.net>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
softfloat already has a few constants defined, use them instead of
redefining them in target-mips.
Rename FLOAT_SNAN32 and FLOAT_SNAN64 to FP_TO_INT32_OVERFLOW and
FP_TO_INT64_OVERFLOW as even if they have the same value, they are
technically different (and defined differently in the MIPS ISA).
Remove the unused constants.
Reviewed-by: Richard Henderson <rth@twiddle.net>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
Instead of accessing the flags from the floating point control
register after updating it, read the softfloat flags.
This is just code cleanup and should not change the behaviour.
Reviewed-by: Richard Henderson <rth@twiddle.net>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
For each FPU instruction that can trigger an FPU exception, to call
call update_fcr31() after.
Remove the manual NaN assignment in case of float to float operation, as
softfloat is already taking care of that. However for float to int
operation, the value has to be changed to the MIPS one. In the cvtpw_ps
case, the two registers have to be handled separately to guarantee
a correct final value in both registers.
Reviewed-by: Richard Henderson <rth@twiddle.net>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
Instead of clearing the softfloat exception flags before each floating
point instruction, reset them to 0 in update_fcr31() when an exception
is detected.
Reviewed-by: Richard Henderson <rth@twiddle.net>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
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>
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>
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>
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>
Add internal functions using by MIPS ASE DSP instructions.
Signed-off-by: Jia Liu <proljc@gmail.com>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
For target-mips also change the return type to bool.
Make include paths for cpu-qom.h consistent for alpha and unicore32.
Signed-off-by: Andreas Färber <afaerber@suse.de>
[AF: Updated new target-openrisc function accordingly]
Acked-by: Richard Henderson <rth@twiddle.net> (for alpha)
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>
Rename helper flags to the new ones. This is purely a mechanical change,
it's possible to use better flags by looking at the helpers.
Reviewed-by: Richard Henderson <rth@twiddle.net>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
target_phys_addr_t is unwieldly, violates the C standard (_t suffixes are
reserved) and its purpose doesn't match the name (most target_phys_addr_t
addresses are not target specific). Replace it with a finger-friendly,
standards conformant hwaddr.
Outstanding patchsets can be fixed up with the command
git rebase -i --exec 'find -name "*.[ch]"
| xargs s/target_phys_addr_t/hwaddr/g' origin
Signed-off-by: Avi Kivity <avi@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
Needed for changing mips_vpe_sleep() argument type to MIPSCPU.
Signed-off-by: Andreas Färber <afaerber@suse.de>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
Needed for moving halted field to CPUState.
The variable name "c" is retained for MIPSCPU to leave "cpu" for CPUState.
Also change return type to bool while at it.
Signed-off-by: Andreas Färber <afaerber@suse.de>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
Needed for changing mips_vpe_is_wfi() argument type to MIPSCPU.
Signed-off-by: Andreas Färber <afaerber@suse.de>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
Free the variable name "other_cpu" for later use for MIPSCPU.
Fix off-by-one indentation while at it.
Signed-off-by: Andreas Färber <afaerber@suse.de>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
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>
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>
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>
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>
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>
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>
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>
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>
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>
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>
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>
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>
Commits b5dc7732e1 and
be24bb4f30 optimized the code
and removed the correct setting of t0. Fix this.
gcc-4.7 detected this bug because parameter arg1 was unused
but set in set_HIT0_LO and set_HI_LOT0.
Cc: Aurelien Jarno <aurelien@aurel32.net>
Signed-off-by: Stefan Weil <sw@weilnetz.de>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
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>
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>
In commit 1bba0dc932 cpu_reset()
was renamed to cpu_state_reset(), to allow introducing a new cpu_reset()
that would operate on QOM objects.
All callers have been updated except for one in target-mips, so drop all
implementations except for the one in target-mips and move the
declaration there until MIPSCPU reset can be fully QOM'ified.
Signed-off-by: Andreas Färber <afaerber@suse.de>
Acked-by: Michael Walle <michael@walle.cc> (for lm32)
Acked-by: Max Filippov <jcmvbkbc@gmail.com> (for xtensa)
Acked-by: Edgar E. Iglesias <edgar.iglesias@gmail.com> (for mb + cris)
Acked-by: Alexander Graf <agraf@suse.de> (for ppc)
Acked-by: Blue Swirl <blauwirbel@gmail.com>
Commit 0f71a7095d (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>
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>
* 'qom-cpu-rest.v1' of git://github.com/afaerber/qemu-cpu:
Makefile: Simplify compilation of target-*/cpu.c
target-mips: Start QOM'ifying CPU init
target-mips: QOM'ify CPU
target-m68k: Add QOM CPU subclasses
target-m68k: Start QOM'ifying CPU init
target-m68k: QOM'ify CPU reset
target-m68k: QOM'ify CPU
target-sh4: Start QOM'ifying CPU init
target-sh4: QOM'ify CPU reset
target-sh4: QOM'ify CPU
MAINTAINERS: Downgrade target-mips and target-sh4 to Odd Fixes
MAINTAINERS: Downgrade target-m68k to Odd Fixes
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>
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>
osdep.h is included via qemu-common.h.
Prepares for use of [u]int_fast*_t types in softfloat code.
Signed-off-by: Andreas Färber <afaerber@suse.de>
Cc: Ben Taylor <bentaylor.solx86@gmail.com>
Cc: Aurélien Jarno <aurelien@aurel32.net>
Cc: Peter Maydell <peter.maydell@linaro.org>
Tested-by: Bernhard Walle <bernhard@bwalle.de>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
Use uintptr_t instead of void * or unsigned long in
several op related functions, env->mem_io_pc and
GETPC() macro.
Reviewed-by: Stefan Weil <sw@weilnetz.de>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
The official spelling is QEMU.
Signed-off-by: Stefan Weil <sw@weilnetz.de>
Reviewed-by: Andreas Färber <afaerber@suse.de>
[blauwirbel@gmail.com: fixed comment style in hw/sun4m.c]
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
The official spelling is QEMU.
Signed-off-by: Stefan Weil <sw@weilnetz.de>
Reviewed-by: Andreas Färber <afaerber@suse.de>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
helper_raise_exception_err does not return, nor do helper_raise_exception
and do_unaligned_access.
Cc: Aurelien Jarno <aurelien@aurel32.net>
Signed-off-by: Stefan Weil <sw@weilnetz.de>
Reviewed-by: Andreas Färber <afaerber@suse.de>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
Scripted conversion:
for file in *.[hc] hw/*.[hc] hw/kvm/*.[hc] linux-user/*.[hc] linux-user/m68k/*.[hc] bsd-user/*.[hc] darwin-user/*.[hc] tcg/*/*.[hc] target-*/cpu.h; do
sed -i "s/CPUState/CPUArchState/g" $file
done
All occurrences of CPUArchState are expected to be replaced by QOM CPUState,
once all targets are QOM'ified and common fields have been extracted.
Signed-off-by: Andreas Färber <afaerber@suse.de>
Reviewed-by: Anthony Liguori <aliguori@us.ibm.com>
Scripted conversion:
sed -i "s/CPUState/CPUMIPSState/g" target-mips/*.[hc]
sed -i "s/#define CPUMIPSState/#define CPUState/" target-mips/cpu.h
Signed-off-by: Andreas Färber <afaerber@suse.de>
Acked-by: Anthony Liguori <aliguori@us.ibm.com>
Frees the identifier cpu_reset for QOM CPUs (manual rename).
Don't hide the parameter type behind explicit casts, use static
functions with strongly typed argument to indirect.
Signed-off-by: Andreas Färber <afaerber@suse.de>
Reviewed-by: Anthony Liguori <aliguori@us.ibm.com>
* it's -> its (fixed for all files)
* dont -> don't (only fixed in a line which was touched by the previous fix)
* distrub -> disturb (fixed in the same line)
Reviewed-by: Andreas Färber <afaerber@suse.de>
Signed-off-by: Stefan Weil <sw@weilnetz.de>
Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
accidently->accidentally
annother->another
choosen->chosen
consideres->considers
decriptor->descriptor
developement->development
paramter->parameter
preceed->precede
preceeding->preceding
priviledge->privilege
propogation->propagation
substraction->subtraction
throught->through
upto->up to
usefull->useful
Fix also grammar in posix-aio-compat.c
Signed-off-by: Stefan Weil <sw@weilnetz.de>
Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
Cc: Richard Henderson <rth@twiddle.net>
Cc: Edgar E. Iglesias <edgar.iglesias@gmail.com>
Cc: Aurelien Jarno <aurelien@aurel32.net>
Cc: Alexander Graf <agraf@suse.de>
Cc: Aurelien Jarno <aurelien@aurel32.net>
Cc: Blue Swirl <blauwirbel@gmail.com>
Signed-off-by: Dong Xu Wang <wdongxu@linux.vnet.ibm.com>
Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
1. The pending need to pass the Status IM gating.
2. The priority is from seven (highest prio) down to zero.
QEMU was doing the opposite.
Signed-off-by: Edgar E. Iglesias <edgar.iglesias@gmail.com>
These registers share some of their fields. Writes to these fields
should be visible through the corresponding mirror fields.
Signed-off-by: Edgar E. Iglesias <edgar.iglesias@gmail.com>
Parameter is_softmmu (and its evil mutant twin brother is_softmuu)
is not used in cpu_*_handle_mmu_fault() functions, remove them
and adjust callers.
Acked-by: Richard Henderson <rth@twiddle.net>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
Move softmmu_exec.h include directives from target-*/exec.h to
target-*/op_helper.c. Move also various other stuff only used in
op_helper.c there.
Define global env in dyngen-exec.h.
For i386, move wrappers for segment and FPU helpers from user-exec.c
to op_helper.c. Implement raise_exception_err_env() to handle dynamic
CPUState. Move the function declarations to cpu.h since they can be
used outside of op_helper.c context.
LM32, s390x, UniCore32: remove unused cpu_halted(), regs_to_env() and
env_to_regs().
ARM: make raise_exception() static.
Convert
#include "exec.h"
to
#include "cpu.h"
#include "dyngen-exec.h"
and remove now unused target-*/exec.h.
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
cea5f9a28f exposed bugs in unassigned memory
access handling. Fix them by always passing CPUState to the handlers.
Reported-by: Hervé Poussineau <hpoussin@reactos.org>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
Move functions cpu_has_work() and cpu_pc_from_tb() from exec.h to cpu.h. This is
needed by later patches.
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
Before the next patch, fix coding style of the areas affected.
Change the type of the return value from cpu_has_work() and
qemu_cpu_has_work() to bool.
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
This bit is never set, therefore we should not read it either.
Signed-off-by: Richard Henderson <rth@twiddle.net>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
The previous patch removed the need for parameter puc.
Is is now unused, so remove it.
Cc: Aurelien Jarno <aurelien@aurel32.net>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Stefan Weil <weil@mail.berlios.de>
Function gen_pc_load was introduced in commit
d2856f1ad4.
The only reason for parameter searched_pc was
a debug statement in target-i386/translate.c.
Parameter puc was needed by target-sparc until
commit d7da2a1040.
Remove searched_pc from the debug statement and remove both
parameters from the parameter list of gen_pc_load.
As the function name gen_pc_load was also misleading,
it is now called restore_state_to_opc. This new name
was suggested by Peter Maydell, thanks.
v2: Remove last parameter, too, and rename the function.
v3: Fix [] typo in target-arm/translate.c.
Fix wrong SHA1 object name in commit message (copy+paste error).
Cc: Aurelien Jarno <aurelien@aurel32.net>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Stefan Weil <weil@mail.berlios.de>
MIPS FPU instructions should start with a clean softfpu status. This
is done for the most instructions, but not for comparison ones.
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
Contrary to cabs.ps.* instructions, c.ps.* should not compare the absolute
value of the operand, but directly the operands.
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
As the softfloat comparison functions already test for NaN, there is no
need to always call the float*_unordered*() functions.
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
float*_eq functions have a different semantics than other comparison
functions. Fix that by first renaming float*_quiet() into float*_eq_quiet().
Note that it is purely mechanical, and the behaviour should be unchanged.
That said it clearly highlight problems due to this different semantics,
they are fixed later in this patch series.
Cc: Alexander Graf <agraf@suse.de>
Acked-by: Edgar E. Iglesias <edgar.iglesias@gmail.com>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
Use the new float*_unordered*() functions from softfloat instead of
redefining a private version.
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
tcg_gen_exit_tb takes a parameter of type tcg_target_long,
so the type casts of pointer to long should be replaced by
type casts of pointer to tcg_target_long (suggested by Blue Swirl).
These changes are needed for build environments where
sizeof(long) != sizeof(void *), especially for w64.
Signed-off-by: Stefan Weil <weil@mail.berlios.de>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
All implementations are now the same, and there is only one caller,
so inline the function there.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
MIPS FPU instructions should start with a clean softfpu status. This
is done for the arithmetic operations and cvt instructions, but not
for round, trunc, ceil and floor.
Signed-off-by: Chris Dearman <chris@mips.com>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
The rule is:
- don't save PC if the exception is only triggered by softmmu.
- save PC if the exception can be triggered by an helper.
Fix a 64-bit kernel crash when loading modules.
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
Break the TB after reading the count register. This makes it
possible to take timer interrupts immediately after a read of
a possibly expired timer.
Signed-off-by: Edgar E. Iglesias <edgar.iglesias@gmail.com>
The softfloat functions float*_is_nan() were badly misnamed,
because they return true only for quiet NaNs, not for all NaNs.
Rename them to float*_is_quiet_nan() to more accurately reflect
what they do.
This change was produced by:
perl -p -i -e 's/_is_nan/_is_quiet_nan/g' $(git grep -l is_nan)
(with the results manually checked.)
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Nathan Froyd <froydnj@codesourcery.com>
Acked-by: Edgar E. Iglesias <edgar.iglesias@gmail.com>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
When the CPU is in wait state, do not wake-up if an interrupt can't be
taken. This avoid host CPU running at 100% if a device (e.g. timer) has
an interrupt line left enabled.
Also factorize code to check if interrupts are enabled in
cpu_mips_hw_interrupts_pending().
Based on a patch from Edgar E. Iglesias <edgar.iglesias@gmail.com>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
Acked-by: Edgar E. Iglesias <edgar.iglesias@gmail.com>
The translation of dmt/emt/dvpe/evpe was doing the moral equivalent of:
int x;
... /* no initialization of x */
x = f (x);
which confused later bits of TCG rather badly, leading to crashes.
Fix the helpers to only return results (those instructions have no
inputs), and fix the translation code accordingly.
Signed-off-by: Nathan Froyd <froydnj@codesourcery.com>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
fprintf_function uses format checking with GCC_FMT_ATTR.
Format errors were fixed in
* target-i386/helper.c
* target-mips/translate.c
* target-ppc/translate.c
Cc: Blue Swirl <blauwirbel@gmail.com>
Signed-off-by: Stefan Weil <weil@mail.berlios.de>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
Compiling with GCC 4.6.0 20100925 produced a lot of warnings like:
/src/qemu/target-mips/translate.c: In function 'gen_ld':
/src/qemu/target-mips/translate.c:1039:17: error: variable 'opn' set but not used [-Werror=unused-but-set-variable]
Fix by adding a dummy cast so that the variable is not unused.
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
The parameter for yield should be handled as a signed integer
for the comparisons to have any effect.
This also avoids a gcc warning with -Wtype-limits.
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
Commit 36388314fe moved most of the
interrupt logic to cpu-exec.c. Remove the remaining useless code
and fix software interrupts.
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
Acked-by: Edgar E. Iglesias <edgar@axis.com>
Tested-by: Edgar E. Iglesias <edgar@axis.com>
When hw interrupt pending bits in CP0_Cause are set, the CPU should
see the hw interrupt line as active. The CPU may or may not take the
interrupt based on internal state (global irq mask etc) but the glue
logic shouldn't care.
This fixes MIPS external hw interrupts in combination with -icount.
Signed-off-by: Edgar E. Iglesias <edgar@axis.com>
This patch adds support for loongson 2E & 2F instructions. They are the
same instructions, but differ by the opcode encoding.
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
Unlike MIPS16, microMIPS lets you choose the ISA mode for your exception
handlers. The ISA mode is selectable via a user-writable CP0.Config3
flag.
Signed-off-by: Nathan Froyd <froydnj@codesourcery.com>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
Add instruction decoding for the microMIPS ASE. All we do is decode and
then forward to the existing gen_* routines.
Signed-off-by: Nathan Froyd <froydnj@codesourcery.com>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
Change code handling mips16-specific branches to use ISA-neutral special
opcodes. Since there are several places where the delay slot
requirements for microMIPS branches differ from mips16 branches, using
opcodes is easier than checking hflags, then checking mips16
vs. microMIPS.
Signed-off-by: Nathan Froyd <froydnj@codesourcery.com>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
Move all knowledge about coprocessor-checking and register numbering
into the gen_cmp* helper functions.
Signed-off-by: Nathan Froyd <froydnj@codesourcery.com>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
Add FMT_* constants for the floating-point format field in opcodes and
tweak a few places to use them. Add enums for various invocations of
FOP and tweak gen_farith and its lone caller accordingly.
Signed-off-by: Nathan Froyd <froydnj@codesourcery.com>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
In the previous patch which introduced fprintf_function to
allow parameter checking by gcc some compiler warnings
remained unfixed.
These warnings are fixed here.
Signed-off-by: Stefan Weil <weil@mail.berlios.de>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
QEMU uses a fixed page size for the CPU TLB. If the guest uses large
pages then we effectively split these into multiple smaller pages, and
populate the corresponding TLB entries on demand.
When the guest invalidates the TLB by virtual address we must invalidate
all entries covered by the large page. However the address used to
invalidate the entry may not be present in the QEMU TLB, so we do not
know which regions to clear.
Implementing a full vaiable size TLB is hard and slow, so just keep a
simple address/mask pair to record which addresses may have been mapped by
large pages. If the guest invalidates this region then flush the
whole TLB.
Signed-off-by: Paul Brook <paul@codesourcery.com>
Removes a set of ifdefs from exec.c.
Introduce TARGET_VIRT_ADDR_SPACE_BITS for all targets other
than Alpha. This will be used for page_find_alloc, which is
supposed to be using virtual addresses in the first place.
Signed-off-by: Richard Henderson <rth@twiddle.net>
When we signal a CpU exception for coprocessor 0, we should indicate
that it's for coprocessor 0 instead of coprocessor 1.
Signed-off-by: Nathan Froyd <froydnj@codesourcery.com>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
In helper.c AREG0 may not correspond do env, so it's not possible to
call cpu_loop_exit() here. Call it from op_helper.c instead.
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
Fix regression introduced by d19954f46d.
4Kc and 4KEc don't support MIPS16.
Signed-off-by: Stefan Weil <weil@mail.berlios.de>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
4Kc, 4KEc cores do not support MIPS16, so not only the
CP0_Config1 had to be fixed (see previous patch),
but also MIPS16 instructions must not be executed.
(Hint from Nathan Froyd, thanks).
Signed-off-by: Stefan Weil <weil@mail.berlios.de>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
Running programs with the MIPS user-mode emulator fails during dynamic
loading, as floating-point instructions are not enabled in in
env->hflags. Move the code for doing so from fpu_init to cpu_reset so
the MIPS_HFLAG_{FPU,F64} setting doesn't get clobbered by cpu_reset
setting env->hflags to MIPS_HFLAG_UM.
The same end can be achieved by swapping the ordering of fpu_init and
cpu_reset in cpu_mips_init, but it seemed better to consolidate the
CONFIG_USER_ONLY code into a single location.
Signed-off-by: Nathan Froyd <froydnj@codesourcery.com>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
There's no good way to add this incrementally, so we do it all at once.
The only changes to shared code are in handle_delay_slot. We need to
flip ISAMode when doing a jump-and-exchange. We also need to set
ISAMode the low bit of the target address for jump-to-register.
Also, since we're now adding bits that can be in MIPS_HFLAG_BMASK_EXT,
make sure we use MIPS_HFLAG_BMASK_BASE in the places where we just want
basic information about a branch.
Signed-off-by: Nathan Froyd <froydnj@codesourcery.com>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
Move delay slot handling to common code whose invocation can be
controlled from gen_intermediate_code_internal.
Signed-off-by: Nathan Froyd <froydnj@codesourcery.com>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
This is a common pattern in existing code. We'll also use it to
implement the mips16 SAVE/RESTORE instructions.
Signed-off-by: Nathan Froyd <froydnj@codesourcery.com>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
It's easier to implement mips16 shift instructions if we're not
examining the opcode inside gen_shift_{imm,}. So move ROTR and ROTRV
and do the special-case handling of SRL and SRLV inside decode_opc.
Likewise for their 64-bit counterparts.
Signed-off-by: Nathan Froyd <froydnj@codesourcery.com>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
We need to stash the operating mode into the low bit of the error PC and
restore it on return from interrupts.
Signed-off-by: Nathan Froyd <froydnj@codesourcery.com>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
We create separate masks for the "basic" branch hflags and the
"extended" branch hflags and define MIPS_HFLAG_BMASK as the logical or
of those two. This is done to avoid churning the codebase in lots of
different places.
We also make the execution mode an hflag under MIPS_HFLAG_TMASK
Signed-off-by: Nathan Froyd <froydnj@codesourcery.com>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
Currently the ll/sc instructions use the virtual address in both
user and system mode. Use the physical address insteead in system
mode.
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
Depending on the CPU, CP0_LLAddr is either read-only or read-write,
and the returned value can be shifted by a variable amount of bits.
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
Signed-off-by: Hervé Poussineau <hpoussin@reactos.org>
The variable CP0_LLAddr represent the full lladdr, not the actual
register value, which is only part of this value and depends on the
CPU.
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
Remove cpu_mips_register()
- move mmu_init(), fpu_init() and mvp_init() into cpu_mips_init()
- move the other parts in cpu_mips_init()
Reported-by: Blue Swirl <blauwirbel@gmail.com>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
In the very least, a change like this requires discussion on the list.
The naming convention is goofy and it causes a massive merge problem. Something
like this _must_ be presented on the list first so people can provide input
and cope with it.
This reverts commit 99a0949b72.
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
Now that MAX_OP_PER_INSTR has been increased to a safer value, removed
the target-mips specific workaround.
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
Single-stepping branches on MIPS didn't work right, because the
generation of EXCP_DEBUG happened after the generation of the code to
exit the current TB. That is, given the code:
bne v0,v1,target
nop
...
target:
addu v0,v0,v1
1:
when you single-stepped through the NOP, execution wouldn't actually
halt until you reached the label `1'.
This patch corrects that and also changes single-stepping so that a
branch and its delay slot are executed as one instruction for the
purposes of single-stepping. This behavior is comparable to what other
MIPS tools (e.g. MIPSsim with MDI) do. GDB avoids placing breakpoints
in branch delay slots, so this change doesn't break anything on the GDB
side.
Signed-off-by: Nathan Froyd <froydnj@codesourcery.com>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
Problem: Our file sys-queue.h is a copy of the BSD file, but there are
some additions and it's not entirely compatible. Because of that, there have
been conflicts with system headers on BSD systems. Some hacks have been
introduced in the commits 15cc923584,
f40d753718,
96555a96d7 and
3990d09adf but the fixes were fragile.
Solution: Avoid the conflict entirely by renaming the functions and the
file. Revert the previous hacks.
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
Conditional moves off fp condition codes were using the result of
get_fp_bit to isolate and test the relevant condition code. However,
get_fp_bit returns the bit number of the condition code, not a
bitmask. (Compare the use of get_fp_bit in gen_compute_branch1, for
instance.)
Fixed by shifting a bitmask into place using the result of get_fp_bit in
the relevant functions (gen_mov{ci,cf_s,cf_d,cf_ps}).
Signed-off-by: Nathan Froyd <froydnj@codesourcery.com>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
handle_cpu_signal is very nearly copy-paste code for each target, with a
few minor variations. This patch sets up appropriate defaults for a
generic handle_cpu_signal and provides overrides for particular targets
that did things differently. Fixing things like the persistent (XXX:
use sigsetjmp) should now become somewhat easier.
Previous comments on this patch suggest that the "activate soft MMU for
this block" comments refer to defunct functionality. I have removed
such blocks for the appropriate targets in this patch.
Signed-off-by: Nathan Froyd <froydnj@codesourcery.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
Fix botched merge of op_ldst_sc calls to match actual implementation.
Thanks to Aurelien Jarno for diagnosing this.
Signed-off-by: Paul Brook <paul@codesourcery.com>
MADD was not correctly writing to HI.
MSUB/MSUBU are specified as `HI||LO - product', not `product - HI||LO'.
Signed-off-by: Nathan Froyd <froydnj@codesourcery.com>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
The only target dependency for most hardware is sizeof(target_phys_addr_t).
Build these files into a convenience library, and use that instead of
building for every target.
Remove and poison various target specific macros to avoid bogus target
dependencies creeping back in.
Big/Little endian is not handled because devices should not know or care
about this to start with.
Signed-off-by: Paul Brook <paul@codesourcery.com>
Include assert.h from qemu-common.h and remove other direct uses.
cpu-all.h still need to include it because of the dyngen-exec.h hacks
Signed-off-by: Paul Brook <paul@codesourcery.com>
This reverts commit r7127, r7132 is a better fix for that.
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@7133 c046a42c-6fe2-441c-8c8c-71466251a162
There is no need to exit the tb after a call to helper_raise_exception
as it already calls cpu_loop_exit().
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@7132 c046a42c-6fe2-441c-8c8c-71466251a162
check_*() functions may in fine call generate_exception(), which ends
by a call to tcg_gen_exit_tb(). As a consequence, we have to make sure
that no TCG temp variables are crossing a check_*() function.
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@7127 c046a42c-6fe2-441c-8c8c-71466251a162
Use a consistent naming of arguments and TCG variables across the whole
file, the same as in tcg/tcg-op.h:
- arg1, arg2, ... for arguments
- t0, t1, t2, ... for variables
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@7106 c046a42c-6fe2-441c-8c8c-71466251a162
CPU state should also be saved for helpers that in fine call
cpu_unlink_tb(). Reported by Stefan Weil.
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@7096 c046a42c-6fe2-441c-8c8c-71466251a162
This replaces a compile time option for some targets and adds
this feature to targets which did not have a compile time option.
Add monitor command to enable or disable single step mode.
Modify monitor command "info status" to display single step mode.
Signed-off-by: Stefan Weil <weil@mail.berlios.de>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@7004 c046a42c-6fe2-441c-8c8c-71466251a162
TCG does not allow the same memory location to be aliased in two
different global registers, fpu_fpr32 and fpu_fpr64.
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6915 c046a42c-6fe2-441c-8c8c-71466251a162
and process termination in legacy applications. Try to guess which we want
based on the presence of multiple threads.
Also implement locking when modifying the CPU list.
Signed-off-by: Paul Brook <paul@codesourcery.com>
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6735 c046a42c-6fe2-441c-8c8c-71466251a162
Original idea&code by Kevin Wolf, split-up in two patches and added more
archs.
This patch introduces a flag to log CPU resets. Useful for tracing
unexpected resets (such as those triggered by x86 triple faults).
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6452 c046a42c-6fe2-441c-8c8c-71466251a162
These are references to 'loglevel' that aren't on a simple 'if (loglevel &
X) qemu_log()' statement.
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6340 c046a42c-6fe2-441c-8c8c-71466251a162
This is a large patch that changes all occurrences of logfile/loglevel
global variables to use the new qemu_log*() macros.
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6338 c046a42c-6fe2-441c-8c8c-71466251a162
Use macros to avoid #ifdefs on debugging code.
This patch doesn't try to merge logging macros from different files,
but just unify the debugging code #ifdefs onto a macro on each file. A
further cleanup can unify the debugging macros on a common header, later
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6332 c046a42c-6fe2-441c-8c8c-71466251a162
Optimize gpr accesses when it is known at translation time that gpr != 0.
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6307 c046a42c-6fe2-441c-8c8c-71466251a162
Replace runtime checks on env->user_mode_only by compile time
checks on CONFIG_USER_ONLY.
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6276 c046a42c-6fe2-441c-8c8c-71466251a162
The attached patch updates the FSF address in the GPL/LGPL boilerplate
in most GPL/LGPLed files, and also in COPYING.LIB.
Signed-off-by: Stuart Brady <stuart.brady@gmail.com>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6162 c046a42c-6fe2-441c-8c8c-71466251a162
Change from v1:
Avoid changing the existing coding style in certain files.
Signed-off-by: Stuart Brady <stuart.brady@gmail.com>
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6120 c046a42c-6fe2-441c-8c8c-71466251a162
All archs use the same cpu_loop_exit, so move the prototype in a common
header. i386 was carrying a __hidden attribute, but that was empty for
this arch anyway.
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5820 c046a42c-6fe2-441c-8c8c-71466251a162
This switches cpu_break/watchpoint_* to TAILQ wrappers, simplifying the
code and also fixing a use after release issue in
cpu_break/watchpoint_remove_all.
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5799 c046a42c-6fe2-441c-8c8c-71466251a162
This patch prepares the QEMU cpu_watchpoint/breakpoint API to allow the
succeeding enhancements this series comes with.
First of all, it overcomes MAX_BREAKPOINTS/MAX_WATCHPOINTS by switching
to dynamically allocated data structures that are kept in linked lists.
This also allows to return a stable reference to the related objects,
required for later introduced x86 debug register support.
Breakpoints and watchpoints are stored with their full information set
and an additional flag field that makes them easily extensible for use
beyond pure guest debugging.
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5738 c046a42c-6fe2-441c-8c8c-71466251a162
This patch refactors the way the CPU state is handled that is associated
with a TB. The basic motivation is to move more arch specific code out
of generic files. Specifically the long #ifdef clutter in tb_find_fast()
has to be overcome in order to avoid duplicating it for the gdb
watchpoint fixes (patch "Restore pc on watchpoint hits").
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5736 c046a42c-6fe2-441c-8c8c-71466251a162
as macros should be avoided when possible.
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5735 c046a42c-6fe2-441c-8c8c-71466251a162
Set t0 to 0 for unimplemented mfc0/dmfc0 instructions. This fixes a tcg
internal error while booting mips linux.
Noticed by Julia Longtin.
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5723 c046a42c-6fe2-441c-8c8c-71466251a162
Optimize code generation in gen_compute_branch1():
- Directly use I32 variables instead of converting values from _tl to
_i32 and back to _tl.
- Write the result directly to bcond instead of passing by a local
variable.
- Temp variables are valid up to and *including* the brcond instruction.
Use them instead of temp local variables.
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5684 c046a42c-6fe2-441c-8c8c-71466251a162
Optimize code generation in gen_movc*():
- Temp variables are valid up to and *including* the brcond instruction.
Use them instead of temp local variables.
- Avoid using temporary variables to transfer values.
- Access fpu_fcr31 directly in gen_movcf_ps().
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5683 c046a42c-6fe2-441c-8c8c-71466251a162
Optimize code generation in gen_farith():
- Temp variables are valid up to and *including* the brcond instruction.
Use them instead of temp local variables.
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5682 c046a42c-6fe2-441c-8c8c-71466251a162
Optimize code generation in gen_muldiv():
- Don't do sign extension when the value is already guaranteed to be
sign extended (otherwise, results are marked as UNPREDICTABLE).
- Access the LO, HI registers directly instead of writting them through
a temporary variable.
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5681 c046a42c-6fe2-441c-8c8c-71466251a162
Optimize code generation in gen_arith()/gen_arith_imm():
- Don't do sign extension when the value is already guaranteed to be
sign extended (otherwise, results are marked as UNPREDICTABLE).
- When the value is sign extended, compare the value to 0 instead of
testing bit 31/63.
- Temp variables are valid up to and *including* the brcond instruction.
Use them instead of temp local variables.
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5680 c046a42c-6fe2-441c-8c8c-71466251a162
Bit shuffle operations can be written with very few TCG instructions
(between 5 and 8), so it is worth converting them to TCG.
This code also move all bit shuffle generation code to a separate
function in order to have a cleaner exception code path, that is it
doesn't store back the TCG register to the target register after the
exception, as the TCG register doesn't exist anymore.
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5679 c046a42c-6fe2-441c-8c8c-71466251a162
Bitfield operations can be written with very few TCG instructions
(between 2 and 5), so it is worth converting them to TCG.
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5678 c046a42c-6fe2-441c-8c8c-71466251a162
Instead of dynamically generating different code depending on the UX
flag, add a new flag in ctx->flags to generate different code.
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5677 c046a42c-6fe2-441c-8c8c-71466251a162
The user mode can be tested at translation time using ctx->hflags.
This simplifies gen_op_addr_add().
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5676 c046a42c-6fe2-441c-8c8c-71466251a162
We obviously don't need to use a temporary variable to write PC.
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5675 c046a42c-6fe2-441c-8c8c-71466251a162
This patch attempts to fix mft* helpers and the associated TCG calls.
mft* helpers do not take a register in argument, however:
- some helpers are called with an argument while they do not take one.
- some helpers are declared with an argument they don't use.
Acked-by: Thiemo Seufer <ths@networkno.de>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5674 c046a42c-6fe2-441c-8c8c-71466251a162
Move tcg_temp_free() out of the conditional part to make sure
the TCG temporary variable is freed in all cases.
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
Acked-by: Thiemo Seufer <ths@networkno.de>
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5673 c046a42c-6fe2-441c-8c8c-71466251a162
In CP0 Index register, bit 31 means 'Probe Failure', while lowest bits
contain the TLB index.
In tlbwi and tlbwr instructions, this Probe Failure bit must be ignored
when reading the TLB index.
Attached patch fixes it.
(Hervé Poussineau)
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5215 c046a42c-6fe2-441c-8c8c-71466251a162
cpu_mips_irqctrl_init() function in hw/mips_timer.c is empty.
Attached patch removes it, and its callers.
(Hervé Poussineau)
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5214 c046a42c-6fe2-441c-8c8c-71466251a162
Attached patch fixes a warning in cpu_mips_find_by_name().
'name' is a string, so it should be declared as char*, not unsigned char*.
(Hervé Poussineau)
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5213 c046a42c-6fe2-441c-8c8c-71466251a162
This patch fixes TCG errors reported on the MIPS target when TCG_DEBUG
is enabled.
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
Acked-by: Thiemo Seufer <ths@networkno.de>
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5164 c046a42c-6fe2-441c-8c8c-71466251a162
In gen_dmtc0 function, TCG temporary variable t0 is freed at the end of
the function. Variable is freed again in the gen_dmtc0 caller.
I removed the free in gen_dmtc0, to do like in gen_dmfc0, gen_mfc0,
gen_mtc0.
(Hervé Poussineau)
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5075 c046a42c-6fe2-441c-8c8c-71466251a162
Save and restore env->interrupt_request and env->halted.
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@4817 c046a42c-6fe2-441c-8c8c-71466251a162
