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even in non-MP kernels, to avoid unnecessary tlb flushes later when
pmap operates on shared pages.
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other MP platforms.
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protected by __ISO_C_VISIBLE > 1999. With a little help from miod@.
ok miod@
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which are uniform for the profclock on each cpu in a SMP system (but using
a different seed for each cpu). on all cpus, avoid seeding with a value out
of the [0, 2^31-1] range (since that is not stable)
ok kettenis drahn
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anything special to prod a cpu to leave the idle loop in signotify.
powerpc, i386, amd64 and sparc64 will follow soon so that everyone has
the same interface to wake an idling cpu.
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For now, sparc64 is arbitrarily set to 256 (only architecture that didn't have
a practical limit in the code on the number of cpus).
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- provide proper dtoa locks
- use the real strtof implementation
- add strtold, __hdtoa, __hldtoa
- add %a/%A support
- don't lose precision in printf, don't round to double anymore
- implement extended-precision versions of libc functions: fpclassify,
isnan, isinf, signbit, isnormal, isfinite, now that the ieee.h is
fixed
- separate vax versions of strtof, and __hdtoa
- add complex math support. added functions: cacos, casin, catan,
ccos, csin, ctan, cacosh, casinh, catanh, ccosh, csinh, ctanh, cexp,
clog, cabs, cpow, csqrt, carg, cimag, conj, cproj, creal, cacosf,
casinf, catanf, ccosf, csinf, ctanf, cacoshf, casinhf, catanhf,
ccoshf, csinhf, ctanhf, cexpf, clogf, cabsf, cpowf, csqrtf, cargf,
cimagf, conjf, cprojf, crealf
- add fdim, fmax, fmin
- add log2. (adapted implementation e_log.c. could be more acruate
& faster, but it's good enough for now)
- remove wrappers & cruft in libm, supposed to work-around mistakes
in SVID, etc.; use ieee versions. fixes issues in python 2.6 for
djm@
- make _digittoint static
- proper definitions for i386, and amd64 in ieee.h
- sh, powerpc don't really have extended-precision
- add missing definitions for mips64 (quad), m{6,8}k (96-bit) float.h
for LDBL_*
- merge lead to frac for m{6,8}k, for gdtoa to work properly
- add FRAC*BITS & EXT_TO_ARRAY32 definitions in ieee.h, for hdtoa&ldtoa
to use
- add EXT_IMPLICIT_NBIT definition, which indicates implicit
normalization bit
- add regression tests for libc: fpclassify and printf
- arith.h & gd_qnan.h definitions
- update ieee.h: hppa doesn't have quad-precision, hppa64 does
- add missing prototypes to gdtoaimp
- on 64-bit platforms make sure gdtoa doesn't use a long when it
really wants an int
- etc., what i may have forgotten...
- bump libm major, due to removed&changed symbols
- no libc bump, since this is riding on djm's libc major crank from
a day ago
discussed with / requested by / testing theo, sthen@, djm@, jsg@,
merdely@, jsing@, tedu@, brad@, jakemsr@, and others.
looks good to millert@
parts of the diff ok kettenis@
this commit does not include:
- man page changes
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userland is allowed to change in psr.
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so don't use any in the 88110-specific parts of locore.
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- math.h shouldn't define FLT_EVAL_METHOD, but float.h should (per
C99). remove from math.h, and add proper definitions in float.h
ok millert@
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Right now when mi_switch picks up the same proc, we didn't clear the
flag which would mean that every time we service an AST we would attempt
a context switch. For some architectures, amd64 being probably the
most extreme, that meant attempting to context switch for every
trap and interrupt.
Now we clear_resched explicitly after every context switch, even if it
didn't do anything. Which also allows us to remove some more code
in cpu_switchto (not done yet).
miod@ ok
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conversions that should shave a few bytes off the kernel.
ok henning, krw, jsing, oga, miod, and thib (``even though i usually prefer
FOO|BAR''; thanks for looking.
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spotted by drahn
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shorter code than a conditional ADDCARRY, so use it; inspired by hppa.
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1 for 88110), for userland to have an easy way to figure out.
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on m88k.
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have jumped on it instead of basing the FPU completion work on the sparc
FPU code.
This is now repaired with this commit, and m88110_fp.c changes directory
again, for the last time.
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instructions to be serialized (this defeats the purpose of having a superscalar
processor, and accesses to volatile variables are done with explicit memory
barriers anyway).
This brings a HUGE speedup: openssl speed -elapsed shows AES is 90% faster,
blowfish is 75% faster, and sha1 is 50% faster. Not so bad!
However, doing this increases the pressure on the processor bus, so it is
necessary to increase the processor bus timeout on 40MHz boards again (to 256
usec). ``black cat'' 50MHz boards seem to be unaffected, so they remain at
64 usec.
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forms of fcvt where source and destination precision is the same.
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sparc{,64} floating-point emulator, adapted to the 88110 specifics. Handling
of these traps is now entirely done in C for convenience.
Although there are a few rounding issues to address, and the XRF is ignored,
this allows all the ieee754 regression tests to pass (lib/libc/ieeefp,
sys/kern/signal/fpsig, sys/kern/signal/sigfpe).
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Fits in the brown-paperbag bug category.
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it five times.
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of offsets / sizeof(register_t), and nuke the REG_OFF macro. No functional
change.
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this allows us to get rid of the dependency of asm_macro.h on asm.h, which
was really only there to bring in psl.h.
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in a _KERNEL-only section, and we want to eventually be able to use it from
the bootblocks.
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be necessary, but not doing it appears to break 88204 (not 88200) and
split CMMUs.
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invalidate tlb ipis, and turn them into simple ``handle once'' ipis.
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MVME197DP to serialize 88410 operations.
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out-of-order (superscalar) execution on these processors.
Since OoO brings a nice 50% to 250% speedup (as shown by ``openssl speed''),
it is definitely worth enabling.
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more work in progress to handle these exceptions correctly, and document
a new undocumented and evil chip bug while there.
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is required.
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field from the processor identification register; this allows .S code which
needs to decide on the cpu type at runtime to check quicker, without needing
to access memory. No functional change.
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once per page and cache the result.
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so do the naive operations with interrupts disabled, and an interlock held
if MULTIPROCESSOR.
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