Commit Graph

260 Commits

Author SHA1 Message Date
Peter Maydell dc355b764d softfloat: Refactor code handling various rounding modes
Refactor the code in various functions which calculates rounding
increments given the current rounding mode, so that instead of a
set of nested if statements we have a simple switch statement.
This will give us a clean place to add the case for the new
tiesAway rounding mode.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <rth@twiddle.net>
2014-01-08 19:07:22 +00:00
Peter Maydell 14c9a07eb9 softfloat: Add float16 <=> float64 conversion functions
Add the conversion functions float16_to_float64() and
float64_to_float16(), which will be needed for the ARM
A64 instruction set.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <rth@twiddle.net>
2014-01-08 19:07:22 +00:00
Peter Maydell c4a1c5e7e2 softfloat: Factor out RoundAndPackFloat16 and NormalizeFloat16Subnormal
In preparation for adding conversions between float16 and float64,
factor out code currently done inline in the float16<=>float32
conversion functions into functions RoundAndPackFloat16 and
NormalizeFloat16Subnormal along the lines of the existing versions
for the other float types.

Note that we change the handling of zExp from the inline code
to match the API of the other RoundAndPackFloat functions; however
we leave the positioning of the binary point between bits 22 and 23
rather than shifting it up to the high end of the word.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <rth@twiddle.net>
2014-01-08 19:07:22 +00:00
Peter Maydell 879d096b37 softfloat: Provide complete set of accessors for fp state
Tidy up the get/set accessors for the fp state to add missing ones
and make them all inline in softfloat.h rather than some inline and
some not.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <rth@twiddle.net>
2014-01-08 19:07:22 +00:00
Tom Musta fd728f2f94 softfloat: Fix float64_to_uint32_round_to_zero
The float64_to_uint32_round_to_zero routine is incorrect.

For example, the following test pattern:

    425F81378DC0CD1F / 0x1.f81378dc0cd1fp+38

will erroneously set the inexact flag.

This patch re-implements the routine to use the float64_to_uint64_round_to_zero
routine.  If saturation occurs we ignore any flags set by the
conversion function and raise only Invalid.

This contribution can be licensed under either the softfloat-2a or -2b
license.

Signed-off-by: Tom Musta <tommusta@gmail.com>
Message-id: 1387397961-4894-6-git-send-email-tommusta@gmail.com
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <rth@twiddle.net>
2014-01-08 19:07:22 +00:00
Tom Musta 5e7f654fa1 softfloat: Fix float64_to_uint32
The float64_to_uint32 has several flaws:

 - for numbers between 2**32 and 2**64, the inexact exception flag
   may get incorrectly set.  In this case, only the invalid flag
   should be set.

       test pattern: 425F81378DC0CD1F / 0x1.f81378dc0cd1fp+38

 - for numbers between 2**63 and 2**64, incorrect results may
   be produced:

       test pattern: 43EAAF73F1F0B8BD / 0x1.aaf73f1f0b8bdp+63

This patch re-implements float64_to_uint32 to re-use the
float64_to_uint64 routine (instead of float64_to_int64).  For the
saturation case, we ignore any flags which the conversion routine
has set and raise only the invalid flag.

This contribution can be licensed under either the softfloat-2a or -2b
license.

Signed-off-by: Tom Musta <tommusta@gmail.com>
Message-id: 1387397961-4894-5-git-send-email-tommusta@gmail.com
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <rth@twiddle.net>
2014-01-08 19:07:22 +00:00
Tom Musta 0a87a3107d softfloat: Fix float64_to_uint64_round_to_zero
The float64_to_uint64_round_to_zero routine is incorrect.

For example, the following test pattern:

    46697351FF4AEC29 / 0x1.97351ff4aec29p+103

currently produces 8000000000000000 instead of FFFFFFFFFFFFFFFF.

This patch re-implements the routine to temporarily force the
rounding mode and use the float64_to_uint64 routine.

This contribution can be licensed under either the softfloat-2a or -2b
license.

Signed-off-by: Tom Musta <tommusta@gmail.com>
Message-id: 1387397961-4894-4-git-send-email-tommusta@gmail.com
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <rth@twiddle.net>
2014-01-08 19:07:22 +00:00
Tom Musta 2f18bbf984 softfloat: Add float32_to_uint64()
This patch adds the float32_to_uint64() routine, which converts a
32-bit floating point number to an unsigned 64 bit number.

This contribution can be licensed under either the softfloat-2a or -2b
license.

Signed-off-by: Tom Musta <tommusta@gmail.com>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
[PMM: removed harmless but silly int64_t casts]
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <rth@twiddle.net>
2014-01-08 19:07:22 +00:00
Peter Maydell 3c85c37f25 softfloat: Fix factor 2 error for scalbn on denormal inputs
If the input to float*_scalbn() is denormal then it represents
a number 0.[mantissabits] * 2^(1-exponentbias) (and the actual
exponent field is all zeroes). This means that when we convert
it to our unpacked encoding the unpacked exponent must be one
greater than for a normal number, which represents
1.[mantissabits] * 2^(e-exponentbias) for an exponent field e.

This meant we were giving answers too small by a factor of 2 for
all denormal inputs.

Note that the float-to-int routines also have this behaviour
of not adjusting the exponent for denormals; however there it is
harmless because denormals will all convert to integer zero anyway.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Aurelien Jarno <aurelien@aurel32.net>
Reviewed-by: Richard Henderson <rth@twiddle.net>
2014-01-08 19:07:22 +00:00
Peter Maydell 34e1c27bc3 softfloat: Only raise Invalid when conversions to int are out of range
We implement a number of float-to-integer conversions using conversion
to an integer type with a wider range and then a check against the
narrower range we are actually converting to. If we find the result to
be out of range we correctly raise the Invalid exception, but we must
also suppress other exceptions which might have been raised by the
conversion function we called.

This won't throw away exceptions we should have preserved, because for
the 'core' exception flags the IEEE spec mandates that the only valid
combinations of exception that can be raised by a single operation are
Inexact + Overflow and Inexact + Underflow. For the non-IEEE softfloat
flag for input denormals, we can guarantee that that flag won't have
been set for out of range float-to-int conversions because a squashed
denormal by definition goes to plus or minus zero, which is always in
range after conversion to integer zero.

This bug has been fixed for some of the float-to-int conversion routines
by previous patches; fix it for the remaining functions as well, so
that they all restore the pre-conversion status flags prior to raising
Invalid.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Aurelien Jarno <aurelien@aurel32.net>
Reviewed-by: Richard Henderson <rth@twiddle.net>
2014-01-08 19:07:22 +00:00
Tom Musta fb3ea83aa5 softfloat: Fix float64_to_uint64
The comment preceding the float64_to_uint64 routine suggests that
the implementation is broken.  And this is, indeed, the case.

This patch properly implements the conversion of a 64-bit floating
point number to an unsigned, 64 bit integer.

This contribution can be licensed under either the softfloat-2a or -2b
license.

Signed-off-by: Tom Musta <tommusta@gmail.com>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <rth@twiddle.net>
2014-01-08 19:07:22 +00:00
Peter Maydell c4850f9e1b softfloat: Make the int-to-float functions take exact-width types
Currently the int-to-float functions take types which are specified
as "at least X bits wide", rather than "exactly X bits wide". This is
confusing and unhelpful since it means that the callers have to include
an explicit cast to [u]intXX_t to ensure the correct behaviour. Fix
them all to take the exactly-X-bits-wide types instead.

Note that this doesn't change behaviour at all since at the moment
we happen to define the 'int32' and 'uint32' types as exactly 32 bits
wide, and the 'int64' and 'uint64' types as exactly 64 bits wide.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <rth@twiddle.net>
2014-01-08 19:07:22 +00:00
Will Newton f581bf5474 softfloat: Add float to 16bit integer conversions.
ARMv8 requires support for converting 32 and 64bit floating point
values to signed and unsigned 16bit integers.

Signed-off-by: Will Newton <will.newton@linaro.org>
[PMM: updated not to incorrectly set Inexact for Invalid inputs]
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <rth@twiddle.net>
2014-01-08 19:07:22 +00:00
Peter Maydell 38970efafd softfloat: Fix exception flag handling for float32_to_float16()
Our float32 to float16 conversion routine was generating the correct
numerical answers, but not always setting the right set of exception
flags. Fix this, mostly by rearranging the code to more closely
resemble RoundAndPackFloat*, and in particular:
 * non-IEEE halfprec always raises Invalid for input NaNs
 * we need to check for the overflow case before underflow
 * we weren't getting the tininess-detected-after-rounding
   case correct (somewhat academic since only ARM uses halfprec
   and it is always tininess-detected-before-rounding)
 * non-IEEE halfprec overflow raises only Invalid, not
   Invalid + Inexact
 * we weren't setting Inexact when we should

Also add some clarifying comments about what the code is doing.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <rth@twiddle.net>
2014-01-08 19:07:22 +00:00
Will Newton e17ab310e9 softfloat: Add minNum() and maxNum() functions to softfloat.
Add floatnn_minnum() and floatnn_maxnum() functions which are equivalent
to the minNum() and maxNum() functions from IEEE 754-2008. They are
similar to min() and max() but differ in the handling of QNaN arguments.

Signed-off-by: Will Newton <will.newton@linaro.org>
Message-id: 1386158099-9239-5-git-send-email-will.newton@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2013-12-10 13:28:50 +00:00
Will Newton e70614eaa0 softfloat: Remove unused argument from MINMAX macro.
The nan_exp argument is not used, so remove it.

Signed-off-by: Will Newton <will.newton@linaro.org>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Message-id: 1386158099-9239-4-git-send-email-will.newton@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2013-12-10 13:28:50 +00:00
Peter Maydell 4039736e6f softfloat: Fix shift128Right for shift counts 64..127
shift128Right would give the wrong result for a shift count
between 64 and 127. This was never noticed because all of
our uses of this function are guaranteed not to use shift
counts in this range.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
Message-id: 1370186269-24353-1-git-send-email-peter.maydell@linaro.org
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-06-10 11:36:12 -05:00
Peter Maydell e3d142d073 fpu: Correct edgecase in float64_muladd
In handling float64_muladd, if we end up doing a subtraction of the
product and c, and the 128 bit result of this subtraction happens to
have its most significant bit in bit 63, we weren't handling this
correctly when attempting to normalize to put the most significant
bit into bit 126.  We would end up doing a right shift by a negative
number (undefined behaviour in C) so at best we would return an
incorrect result to the guest.  MSB in bit 63 has to be handled as a
special case separately from MSB in 0..62 and MSB in 63..126.  (MSB
in 127 is not possible.)

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Aurelien Jarno <aurelien@aurel32.net>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2013-04-15 16:06:15 +02:00
Richard Sandiford a6e7c18476 softfloat: Handle float_muladd_negate_c when product is zero
Honour float_muladd_negate_c in the case where the product is zero and
c is nonzero.  Previously we would fail to negate c.

Seen in (and tested against) the gfortran testsuite on MIPS.

Signed-off-by: Richard Sandiford <rdsandiford@googlemail.com>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
2013-01-26 13:22:09 +00:00
Richard Henderson 1e397eadf1 softfloat: Implement uint64_to_float128
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <rth@twiddle.net>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
2013-01-05 10:12:50 +00:00
Richard Henderson 17ed229379 softfloat: Fix uint64_to_float64
The interface to normalizeRoundAndPackFloat64 requires that the
high bit be clear.  Perform one shift-right-and-jam if needed.

Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <rth@twiddle.net>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
2013-01-05 10:12:49 +00:00
Paolo Bonzini 6b4c305cbd fpu: move public header file to include/fpu
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2012-12-19 08:32:46 +01:00
Paolo Bonzini 1de7afc984 misc: move include files to include/qemu/
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2012-12-19 08:32:39 +01:00
Aurelien Jarno bbc1dedef6 softfloat: implement fused multiply-add NaN propagation for MIPS
Add a pickNaNMulAdd function for MIPS, implementing NaN propagation
rules for MIPS fused multiply-add instructions.

Cc: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <rth@twiddle.net>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2012-10-31 22:20:45 +01:00
Peter Maydell e744c06fca fpu/softfloat.c: Return correctly signed values from uint64_to_float32
The uint64_to_float32() conversion function was incorrectly always
returning numbers with the sign bit set (ie negative numbers). Correct
this so we return positive numbers instead.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2012-10-01 22:06:39 +02:00
Peter Maydell 4be8eeacb9 fpu/softfloat.c: Remove pointless shift of always-zero value
In float16_to_float32, when returning an infinity, just pass zero
as the mantissa argument to packFloat32(), rather than shifting
a value which we know must be zero.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <rth@twiddle.net>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2012-10-01 22:06:39 +02:00
Max Filippov b81fe822da target-xtensa: specialize softfloat NaN rules
NaN propagation rule: leftmost NaN in the expression gets propagated to
the result.

Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
2012-09-22 17:59:12 +00:00
Max Filippov 213ff4e6df softfloat: add NO_SIGNALING_NANS
Architectures that don't have signaling NaNs can define
NO_SIGNALING_NANS, it will make float*_is_quiet_nan return 1 for any NaN
and float*_is_signaling_nan always return 0.

Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
2012-09-22 17:59:12 +00:00
Max Filippov 6617680296 softfloat: make float_muladd_negate_* flags independent
Flags passed into float{32,64}_muladd are treated as bits; assign
independent bits to float_muladd_negate_* to allow precise control over
what gets negated in float{32,64}_muladd.

Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
Reviewed-by: Aurelien Jarno <aurelien@aurel32.net>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
2012-09-22 17:59:12 +00:00
Andreas Färber 94a49d86c5 softfloat: Replace int16 type with int_fast16_t
Based on the following Coccinelle patch:

@@
typedef int16, int_fast16_t;
@@
-int16
+int_fast16_t

Avoids a workaround for AIX.

Add typedef for pre-10 Solaris.

Signed-off-by: Andreas Färber <afaerber@suse.de>
Cc: malc <av1474@comtv.ru>
Cc: Ben Taylor <bentaylor.solx86@gmail.com>
Tested-by: Bernhard Walle <bernhard@bwalle.de>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
2012-04-28 09:13:26 +00:00
Andreas Färber 5aea4c589a softfloat: Replace uint16 type with uint_fast16_t
Based on the following Coccinelle patch:

@@
typedef uint16, uint_fast16_t;
@@
-uint16
+uint_fast16_t

Fixes the build of the Cocoa frontend on Mac OS X and avoids a
workaround for AIX.

For pre-10 Solaris include osdep.h.

Reported-by: Pavel Borzenkov <pavel.borzenkov@gmail.com>
Reported-by: Rui Carmo <rui.carmo@gmail.com>
Signed-off-by: Andreas Färber <afaerber@suse.de>
Cc: Juan Pineda <juan@logician.com>
Cc: malc <av1474@comtv.ru>
Cc: Ben Taylor <bentaylor.solx86@gmail.com>
Tested-by: Bernhard Walle <bernhard@bwalle.de>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
2012-04-28 09:13:09 +00:00
Andreas Färber c9696547d4 softfloat: Fix mixups of int and int16
normalizeFloat{32,64}Subnormal() expect the exponent as int16, not int.
This went unnoticed since int16 and uint16 were both typedef'ed to int.

Signed-off-by: Andreas Färber <afaerber@suse.de>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Tested-by: Bernhard Walle <bernhard@bwalle.de>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
2012-04-28 09:12:24 +00:00
Juan Quintela 0eb4fc817f softfloat: make USE_SOFTFLOAT_STRUCT_TYPES compile
This change makes it compile and return the same value than the #undef one.

Signed-off-by: Juan Quintela <quintela@redhat.com>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Acked-by: Andreas Färber <afaerber@suse.de>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
2012-04-21 13:26:47 +00:00
Peter Maydell 760e141613 softfloat: roundAndPackInt{32, 64}: Don't assume int32 is 32 bits
Fix code in roundAndPackInt32 that assumed that int32 was only
32 bits, by simply using int32_t instead. Fix the parallel bug
in roundAndPackInt64 as well, although that one is only theoretical
since it's unlikely that int64 will ever be more than 64 bits.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
2012-04-07 11:15:55 +00:00
Peter Maydell b3a6a2e041 softfloat: float*_to_int32_round_to_zero: don't assume int32 is 32 bits
Code in the float64_to_int32_round_to_zero() function was assuming
that int32 would not be wider than 32 bits; this meant it might
not correctly detect the overflow case. We take the simple approach
of using int32_t. Also fix equivalent issues in the functions
for other float sizes.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
2012-04-07 11:15:44 +00:00
Avi Kivity 3bf7e40ab9 softfloat: fix for C99
C99 appears to consider compound literals as non-constants, and complains
when they are used in static initializers.  Switch to ordinary initializer
syntax.

Signed-off-by: Avi Kivity <avi@redhat.com>
Acked-by: Andreas Färber <afaerber@suse.de>
Reported-by: Andreas Färber <andreas.faerber@web.de>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
2012-03-17 13:01:18 +00:00
Peter Maydell 369be8f618 softfloat: Implement fused multiply-add
Implement fused multiply-add as a softfloat primitive. This implements
"a+b*c" as a single step without any intermediate rounding; it is
specified in IEEE 754-2008 and implemented in a number of CPUs.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2011-10-19 16:14:06 +00:00
Peter Maydell 2ac8bd03c5 softfloat: Reinstate accidentally disabled target-specific NaN handling
Include config.h in softfloat.c, so that the target specific ifdefs in
softfloat-specialize.h are evaluated correctly. This was accidentally
broken in commit 789ec7ce2 when config-target.h was removed from
softfloat.h, and means that most targets will have been returning the
wrong results for calculations involving NaNs.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
2011-10-01 06:19:07 +00:00
Andreas Färber 9f8d2a093f softfloat: Use uint32 consistently
Prepares for uint32 replacement.

Signed-off-by: Andreas Färber <andreas.faerber@web.de>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
2011-09-03 17:47:14 +00:00
Andreas Färber 38641f8f54 softfloat: Use uint16 consistently
Prepares for uint16 replacement.

Signed-off-by: Andreas Färber <andreas.faerber@web.de>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
2011-09-03 17:46:43 +00:00
Paolo Bonzini 789ec7ce20 softfloat: change default nan definitions to variables
Most definitions in softfloat.h are really target-independent, but the
file is not because it includes definitions of the default NaN values.
Change those to variables to allow including softfloat.h from files that
are not compiled per-target.  By making them const, the compiler is
allowed to optimize them into softfloat functions that use them.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2011-07-29 08:25:45 -05:00
Aurelien Jarno 587eabfafc softfloat: add float*_is_zero_or_denormal()
float*_is_zero_or_denormal() is available for float32, but not for
float64, floatx80 and float128. Fix that.

Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2011-06-03 16:07:53 +02:00
Aurelien Jarno be22a9abc0 softfloat: always enable floatx80 and float128 support
Now that softfloat-native is gone, there is no real point on not always
enabling floatx80 and float128 support.

Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2011-06-03 16:07:51 +02:00
Aurelien Jarno cf67c6bad5 softfloat-native: remove
Remove softfloat-native support, all targets are now using softfloat
instead.

Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2011-06-03 16:07:51 +02:00
Peter Maydell e6afc87f80 softfloat: Add new flag for when denormal result is flushed to zero
Add a new float_flag_output_denormal which is set when the result
of a floating point operation would be denormal but is flushed to
zero because we are in flush_to_zero mode. This is necessary because
some architectures signal this condition as an underflow and others
signal it as an inexact result.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2011-05-23 22:39:35 +02:00
Aurelien Jarno 4cc5383f80 softfloat-native: add float*_is_any_nan() functions
Add float*_is_any_nan() functions to match the softfloat API.

Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2011-04-25 11:18:33 +02:00
Aurelien Jarno d6882cf01f softfloat-native: fix float*_scalbn() functions
float*_scalbn() should be able to take a status parameter. Fix that.

Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2011-04-25 11:18:33 +02:00
Aurelien Jarno 326b9e98a3 softfloat: fix float*_scalnb() corner cases
float*_scalnb() were not taking into account all cases. This patch fixes
some corner cases:
- NaN values in input were not properly propagated and the invalid flag
  not correctly raised. Use propagateFloat*NaN() for that.
- NaN or infinite values in input of floatx80_scalnb() were not correctly
  detected due to a typo.
- The sum of exponent and n could overflow, leading to strange results.
  Additionally having int16 defined to int make that happening for a very
  small range of values. Fix that by saturating n to the maximum exponent
  range, and using an explicit wider type if needed.

Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2011-04-25 11:18:33 +02:00
Aurelien Jarno f6714d365d softfloat: add floatx80_compare*() functions
Add floatx80_compare() and floatx80_compare_quiet() functions to match
the softfloat-native ones.

Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2011-04-25 11:18:32 +02:00
Aurelien Jarno d2b1027d5f softfloat-native: add a few constant values
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2011-04-25 11:18:32 +02:00
Aurelien Jarno c4b4c77a80 softfloat: add pi constants
Add a pi constant for float32, float64, floatx80. It will be used by
target-i386 and later by the trigonometric functions.

Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2011-04-25 11:18:32 +02:00
Aurelien Jarno f3218a8df0 softfloat: add floatx80 constants
Add floatx80 constants similarly to float32 or float64.

Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2011-04-25 11:18:32 +02:00
Aurelien Jarno b76235e400 softfloat: fix floatx80_is_infinity()
With floatx80, the explicit bit is set for infinity.

Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2011-04-25 11:18:32 +02:00
Aurelien Jarno e2f422047b softfloat: fix floatx80 handling of NaN
The floatx80 format uses an explicit bit that should be taken into account
when converting to and from commonNaN format.

When converting to commonNaN, the explicit bit should be removed if it is
a 1, and a default NaN should be used if it is 0.

When converting from commonNan, the explicit bit should be added.

Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2011-04-25 11:18:32 +02:00
Aurelien Jarno f5a64251f2 softfloat: improve description of comparison functions
Make clear for all comparison functions which ones trigger an exception
for all NaNs, and which one only for sNaNs.

Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2011-04-17 20:32:15 +02:00
Aurelien Jarno b689362d14 softfloat: move float*_eq and float*_eq_quiet
I am not a big fan of code moving, but having the signaling version in
the middle of quiet versions and vice versa doesn't make the code easy
to read.

This patch is a simple code move, basically swapping locations of
float*_eq and float*_eq_quiet.

Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2011-04-17 20:32:15 +02:00
Aurelien Jarno 2657d0ff8f softfloat: rename float*_eq_signaling() into float*_eq()
float*_eq_signaling functions have a different semantics than other
comparison functions. Fix that by renaming float*_quiet_signaling() into
float*_eq().

Note that it is purely mechanical, and the behaviour should be unchanged.

Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2011-04-17 20:32:14 +02:00
Aurelien Jarno 211315fb5e softfloat: rename float*_eq() into float*_eq_quiet()
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>
2011-04-17 20:32:14 +02:00
Aurelien Jarno b4a0ef7911 softfloat-native: add float*_unordered_quiet() functions
Add float*_unordered_quiet() functions to march the softfloat versions.
As FPU status is not tracked with softfloat-native, they don't differ
from the signaling version.

Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2011-04-17 20:32:14 +02:00
Aurelien Jarno 67b7861d63 softfloat: add float*_unordered_{,quiet}() functions
Add float*_unordered() functions to softfloat, matching the softfloat-native
ones. Also add float*_unordered_quiet() functions to match the others
comparison functions.

This allow target-i386/ops_sse.h to be compiled with softfloat.

Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2011-04-17 20:32:14 +02:00
Aurelien Jarno b3b4c7f33f softfloat: use GCC builtins to count the leading zeros
Softfloat has its own implementation to count the leading zeros. However
a lot of architectures have either a dedicated instruction or an
optimized to do that. When using GCC >= 3.4, this patch uses GCC builtins
instead of the handcoded implementation.

Note that I amware that QEMU_GNUC_PREREQ is defined in osdep.h and that
clz32() and clz64() are defined in host-utils.h, but I think it is better
to keep the softfloat implementation self contained.

Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2011-04-17 20:32:14 +02:00
Peter Maydell c29aca4461 softfloat: Add setter function for tininess detection mode
Add a setter function for the underflow tininess detection mode,
in line with the similar functions for other parts of the float status
structure.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2011-04-12 23:33:33 +02:00
Guan Xuetao d2fbca9422 unicore32: necessary modifications for other files to support unicore32
Signed-off-by: Guan Xuetao <gxt@mprc.pku.edu.cn>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
2011-04-12 18:49:05 +00:00
Peter Maydell 274f1b041e softfloat: Add float*_min() and float*_max() functions
Add min and max operations to softfloat. This allows us to implement
propagation of NaNs and handling of negative zero correctly (unlike
the approach of having target helper routines return one of the operands
based on the result of a comparison op).

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2011-04-03 17:19:38 +02:00
Andreas Färber bb98fe42c5 softfloat: Drop [s]bits{8, 16, 32, 64} types in favor of [u]int{8, 16, 32, 64}_t
They are defined with the same semantics as the POSIX types,
so prefer those for consistency. Suggested by Peter Maydell.

Cc: Peter Maydell <peter.maydell@linaro.org>
Cc: Aurelien Jarno <aurelien@aurel32.net>
Signed-off-by: Andreas Färber <andreas.faerber@web.de>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2011-03-21 21:46:14 +01:00
Andreas Färber 87b8cc3cf3 softfloat: Resolve type mismatches between declaration and implementation
The original SoftFloat 2.0b library avoided the use of custom integer types
in its public headers. This requires the definitions of int{8,16,32,64} to
match the assumptions in the declarations. This breaks on BeOS R5 and Haiku/x86,
where int32 is defined in {be,os}/support/SupportDefs.h in terms of a long
rather than an int. Spotted by Michael Lotz.

Since QEMU already breaks this distinction by defining those types just above,
do use them for consistency and to allow #ifndef'ing them out as done for
[u]int16 on AIX.

Cc: Michael Lotz <mmlr@mlotz.ch>
Cc: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Andreas Färber <andreas.faerber@web.de>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2011-03-21 21:46:10 +01:00
Andreas Färber 8d725fac63 softfloat: Prepend QEMU-style header with derivation notice
The SoftFloat license requires "prominent notice that the work
is derivative". Having added features like improved 16-bit support
for arm already, add such a notice to the sources.

softfloat-native.[ch] are not under the SoftFloat license
and thus are not changed.

Cc: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Andreas Färber <andreas.faerber@web.de>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2011-03-21 21:46:05 +01:00
Christophe Lyon c30fe7dfc4 softfloat: add _set_sign(), _infinity and _half for 32 and 64 bits floats.
These constants and utility function are needed to implement some
helpers. Defining constants avoids the need to re-compute them at
runtime.

Signed-off-by: Christophe Lyon <christophe.lyon@st.com>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2011-02-24 08:53:36 +01:00
Christophe Lyon 8559666ddb softfloat: move all default NaN definitions to softfloat.h.
These special values are needed to implement some helper functions,
which return/use these values in some cases.

Signed-off-by: Christophe Lyon <christophe.lyon@st.com>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2011-02-24 08:53:36 +01:00
Peter Maydell d5138cf4a8 softfloat: Fix compilation failures with USE_SOFTFLOAT_STRUCT_TYPES
Make softfloat compile with USE_SOFTFLOAT_STRUCT_TYPES defined, by
adding and using new macros const_float16(), const_float32() and
const_float64() so you can use array initializers in an array of
float16/float32/float64 whether the types are bare or wrapped in the
structs.

[aurelien@aurel32.net: do the same for float16]
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2011-02-10 20:16:43 +01:00
Peter Maydell f591e1bedf softfloat: Correctly handle NaNs in float16_to_float32()
Correctly handle NaNs in float16_to_float32(), by defining and
using a float16ToCommonNaN() function, as we do with the other formats.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2011-02-10 18:28:29 +01:00
Peter Maydell 600e30d2b2 softfloat: Fix single-to-half precision float conversions
Fix various bugs in the single-to-half-precision conversion code:
 * input NaNs not correctly converted in IEEE mode
   (fixed by defining and using a commonNaNToFloat16())
 * wrong values returned when converting NaN/Inf into non-IEEE
   half precision value
 * wrong values returned for conversion of values which are
   on the boundary between denormal and zero for the half
   precision format
 * zeroes not correctly identified
 * excessively large results in non-IEEE mode should
   generate InvalidOp, not Overflow

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2011-02-10 18:28:21 +01:00
Christophe Lyon bcd4d9afd4 softfloat: Honour default_nan_mode for float-to-float conversions
Honour the default_nan_mode flag when doing conversions between
different floating point formats, as well as when returning a NaN from
a two-operand floating point function. This corrects the behaviour
of float<->double conversions on both ARM and SH4.

Signed-off-by: Christophe Lyon <christophe.lyon@st.com>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Aurelien Jarno <aurelien@aurel32.net>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2011-02-10 18:28:19 +01:00
Peter Maydell bb4d4bb376 softfloat: Add float16 type and float16 NaN handling functions
Add a float16 type to softfloat, rather than using bits16 directly.
Also add the missing functions float16_is_quiet_nan(),
float16_is_signaling_nan() and float16_maybe_silence_nan(),
which are needed for the float16 conversion routines.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2011-02-10 18:28:09 +01:00
Aurelien Jarno de4af5f792 softfloat: fix floatx80_is_{quiet,signaling}_nan()
floatx80_is_{quiet,signaling}_nan() functions are incorrectly detecting
the type of NaN, depending on SNAN_BIT_IS_ONE, one of the two is
returning the correct value, and the other true for any kind of NaN.

This patch fixes that by applying the same kind of comparison as for
other float formats, but taking into account the explicit bit.

Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2011-01-20 12:37:20 +01:00
Peter Maydell 6f3300ad2b softfloat: Add float32_is_zero_or_denormal() function
Add a utility function to softfloat to test whether a float32
is zero or denormal.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Aurelien Jarno <aurelien@aurel32.net>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2011-01-14 20:39:18 +01:00
Aurelien Jarno 102016020b softfloat: fix default-NaN mode
When the default-NaN mode is enabled, it should return the default NaN
value, but it should anyway raise the invalid operation flag if one of
the operand is an sNaN.

I have checked that this behavior matches the ARM and SH4 manuals, as
well as real SH4 hardware.

Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2011-01-14 20:39:17 +01:00
Aurelien Jarno e90877507e softfloat: SH4 has the sNaN bit set
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2011-01-14 20:39:17 +01:00
Peter Maydell 2bed652fc5 softfloat: Implement floatx80_is_any_nan() and float128_is_any_nan()
Implement versions of float*_is_any_nan() for the floatx80 and
float128 types.

Acked-by: Aurelien Jarno <aurelien@aurel32.net>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Riku Voipio <riku.voipio@iki.fi>
2011-01-07 17:35:48 +02:00
Peter Maydell 37d18660bb softfloat: Implement flushing input denormals to zero
Add support to softfloat for flushing input denormal float32 and float64
to zero. softfloat's existing 'flush_to_zero' flag only flushes denormals
to zero on output. Some CPUs need input denormals to be flushed before
processing as well. Implement this, using a new status flag to enable it
and a new exception status bit to indicate when it has happened. Existing
CPUs should be unaffected as there is no behaviour change unless the
mode is enabled.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Acked-by: Aurelien Jarno <aurelien@aurel32.net>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2011-01-06 22:16:59 +01:00
Aurelien Jarno e024e881bb target-ppc: Implement correct NaN propagation rules
Implement the correct NaN propagation rules for PowerPC targets by
providing an appropriate pickNaN function.

Also fix the #ifdef tests for default NaN definition, the correct name
is TARGET_PPC instead of TARGET_POWERPC.

Reviewed-by: Nathan Froyd <froydnj@codesourcery.com>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2011-01-06 16:29:42 +01:00
Aurelien Jarno 084d19ba71 target-mips: Implement correct NaN propagation rules
Implement the correct NaN propagation rules for MIPS targets by
providing an appropriate pickNaN function.

Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2011-01-06 16:29:35 +01:00
Aurelien Jarno 1f398e0825 softfloat: use float{32,64,x80,128}_maybe_silence_nan()
Use float{32,64,x80,128}_maybe_silence_nan() instead of toggling the
sNaN bit manually. This allow per target implementation of sNaN to qNaN
conversion.

Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
2011-01-06 16:29:29 +01:00
Aurelien Jarno f6a7d92aed softfloat: add float{x80,128}_maybe_silence_nan()
Add float{x80,128}_maybe_silence_nan() functions, they will be need by
propagateFloat{x80,128}NaN().

Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2011-01-06 16:29:23 +01:00
Aurelien Jarno 93ae1c6fea softfloat: fix float{32,64}_maybe_silence_nan() for MIPS
On targets that define sNaN with the sNaN bit as one, simply clearing
this bit may correspond to an infinite value.

Convert it to a default NaN if SNAN_BIT_IS_ONE, as it corresponds to
the MIPS implementation, the only emulated CPU with SNAN_BIT_IS_ONE.
When other CPU of this type are added, this might be updated to include
more cases.

Acked-by: Alexander Graf <agraf@suse.de>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2011-01-06 16:29:17 +01:00
Aurelien Jarno d735d695e7 softfloat: rename *IsNaN variables to *IsQuietNaN
Similarly to what has been done in commit
185698715d rename the misnamed *IsNaN
variables into *IsQuietNaN.

Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2011-01-06 16:29:11 +01:00
Aurelien Jarno 34d2386198 softfloat: remove HPPA specific code
We don't have any HPPA target, so let's remove HPPA specific code. It
can be re-added when someone adds an HPPA target.

This has been blessed by Stuart Brady <sdb@zubnet.me.uk>, author of the
target-hppa fork.

Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2011-01-06 16:29:05 +01:00
Peter Maydell 011da610ba target-arm: Implement correct NaN propagation rules
Implement the correct NaN propagation rules for ARM targets by
providing an appropriate pickNaN function.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2011-01-02 23:59:03 +01:00
Peter Maydell 354f211b1a softfloat: abstract out target-specific NaN propagation rules
IEEE754 doesn't specify precisely what NaN should be returned as
the result of an operation on two input NaNs. This is therefore
target-specific. Abstract out the code in propagateFloat*NaN()
which was implementing the x87 propagation rules, so that it
can be easily replaced on a per-target basis.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2011-01-02 23:58:57 +01:00
Peter Maydell 185698715d softfloat: Rename float*_is_nan() functions to float*_is_quiet_nan()
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>
2011-01-02 11:15:25 +01:00
Peter Maydell cbcef455a2 softfloat: Add float/double to 16 bit integer conversion functions
The ARM architecture needs float/double to 16 bit integer conversions.
(The 32 bit versions aren't sufficient because of the requirement
to saturate at 16 bit MAXINT/MININT and to get the exception bits right.)

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Nathan Froyd <froydnj@codesourcery.com>
2010-12-07 15:37:34 +00:00
Peter Maydell b408dbdec3 softfloat: Add float*_maybe_silence_nan() functions
Add functions float*_maybe_silence_nan() which ensure that a
value is not a signaling NaN by turning it into a quiet NaN.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Nathan Froyd <froydnj@codesourcery.com>
2010-12-07 15:37:34 +00:00
Peter Maydell 21d6ebde76 softfloat: Add float*_is_any_nan() functions
Add float*_is_any_nan() functions which return true if the argument
is a NaN of any kind (quiet or signalling).

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Nathan Froyd <froydnj@codesourcery.com>
2010-12-07 15:37:34 +00:00
Aurelien Jarno 8229c9913a softfloat: add float32_exp2()
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2010-07-13 18:18:23 +02:00
Blue Swirl ed086f3dde softfloat: remove dead assignments, spotted by clang
Value stored to 'bSign' is never read.

Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
2010-03-07 13:49:58 +00:00
Richard Henderson 8443effb50 target-alpha: Split up FPCR value into separate fields.
The fpcr_exc_status, fpcr_exc_mask, and fpcr_dyn_round fields
are stored in <softfloat.h> format for convenience during
regular execution.

Revert the addition of float_exception_mask to float_status,
added in ba0e276db4.

Signed-off-by: Richard Henderson <rth@twiddle.net>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2010-02-23 23:36:22 +01:00
Stefan Weil bc4347b883 arm host: fix compiler warning
Compilation for arm (native or cross) results in this
warning:

fpu/softfloat-native.c: In function ‘float64_round_to_int’:
fpu/softfloat-native.c:387: error: control reaches end of non-void function

float64_round_to_int uses special assembler code for arm
and has no explicit return value.

As there is no obvious reason why arm should need special
code, all fpu related conditionals were removed.
The remaining code is standard (C99) and compiles for arm,
too.

Signed-off-by: Stefan Weil <weil@mail.berlios.de>
Acked-by: Laurent Desnogues <laurent.desnogues@gmail.com>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2010-02-06 23:16:05 +01:00
Richard Henderson ba0e276db4 target-alpha: Fixes for alpha-linux syscalls.
1. Add correct definitions of error numbers.
2. Implement SYS_osf_sigprocmask
3. Implement SYS_osf_get/setsysinfo for IEEE_FP_CONTROL.

This last requires exposing the FPCR value to do_syscall.
Since this value is actually split up into the float_status,
expose routines from helper.c to access it.

Finally, also add a float_exception_mask field to float_status.
We don't actually use it to control delivery of exceptions to
the emulator yet, but simply hold the value that we placed there
when loading/storing the FPCR.

Signed-off-by: Richard Henderson <rth@twiddle.net>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2009-12-13 20:32:36 +01:00
Richard Henderson 990b3e1901 target-alpha: Enable softfloat.
Signed-off-by: Richard Henderson <rth@twiddle.net>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2009-12-13 20:32:36 +01:00
Andreas Färber be45f06826 Silence softfloat warnings on OpenSolaris
Don't define C99 math functions on OpenSolaris (Solaris 11),
which still ships GCC 3.4.3. This fixes redefinition warnings.

Spotted by Palle Lyckegaard.

Signed-off-by: Andreas Färber <afaerber@opensolaris.org>
Cc: Palle Lyckegaard <palle@lyckegaard.dk>
Cc: Ben Taylor <bentaylor.solx86@gmail.com>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
2009-12-13 14:28:17 +00:00
Aurelien Jarno a167ba5085 Add support for GNU/kFreeBSD
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2009-11-29 18:00:41 +01:00
Paul Brook 600114988c ARM FP16 support
Implement the ARM VFP half precision floating point extensions.

Signed-off-by: Paul Brook <paul@codesourcery.com>
2009-11-19 16:45:20 +00:00
Juan Quintela 75b5a697ed rename NEEDS_LIBSUNMATH to CONFIG_NEEDS_LIBSUNMATH
Once there fix a place where it was misspelled

Signed-off-by: Juan Quintela <quintela@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2009-07-27 14:10:55 -05:00
Juan Quintela e2542fe2bc rename WORDS_BIGENDIAN to HOST_WORDS_BIGENDIAN
Signed-off-by: Juan Quintela <quintela@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2009-07-27 14:09:21 -05:00
Juan Quintela 71e72a19ba rename HOST_BSD to CONFIG_BSD
Signed-off-by: Juan Quintela <quintela@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2009-07-27 14:09:20 -05:00
Juan Quintela dfe5fff3ea change HOST_SOLARIS to CONFIG_SOLARIS{_VERSION}
Signed-off-by: Juan Quintela <quintela@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2009-07-27 14:09:16 -05:00
blueswir1 3f4cb3d37f Fix OpenSolaris gcc4 warnings: iovec type mismatches, missing 'static'
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@7103 c046a42c-6fe2-441c-8c8c-71466251a162
2009-04-13 16:31:01 +00:00
blueswir1 14d483eca0 Fix OpenSolaris softfloat warnings
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@7102 c046a42c-6fe2-441c-8c8c-71466251a162
2009-04-13 16:27:08 +00:00
blueswir1 2734c7037e Rename one more _BSD to HOST_BSD (spotted by Hasso Tepper)
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6782 c046a42c-6fe2-441c-8c8c-71466251a162
2009-03-08 15:58:00 +00:00
blueswir1 179a2c1971 Rename _BSD to HOST_BSD so that it's more obvious that it's defined by configure
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6775 c046a42c-6fe2-441c-8c8c-71466251a162
2009-03-08 08:23:32 +00:00
blueswir1 70c14705c3 Sparse fixes: dubious mixing of bitwise and logical operations
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6741 c046a42c-6fe2-441c-8c8c-71466251a162
2009-03-07 16:03:05 +00:00
aurel32 374dfc33e2 soft-float: add float32_log2() and float64_log2()
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6518 c046a42c-6fe2-441c-8c8c-71466251a162
2009-02-05 13:42:47 +00:00
aurel32 196cfc89e8 softfloat: add a 1.0 constant for float32 and float64
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6514 c046a42c-6fe2-441c-8c8c-71466251a162
2009-02-04 13:52:27 +00:00
malc 947f5fcbde Add static qualifier to local functions
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6436 c046a42c-6fe2-441c-8c8c-71466251a162
2009-01-25 10:56:51 +00:00
malc e58ffeb322 Remove all traces of __powerpc__
According to $GCC/gcc/config/rs6000/rs6000-c.c _ARCH_PPC is the
ubiquitous define which should be used to test whether gcc targets
PowerPC, on 64bit platforms _ARCH_PPC64 will be also defined.

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6301 c046a42c-6fe2-441c-8c8c-71466251a162
2009-01-14 18:39:49 +00:00
aurel32 e872aa811a softfloat-native: fix type of float_rounding_mode
fegetround() and fesetround() are using an int type. Change the type of
float_rounding_mode and floatx80_rounding_precision in the float_status
structure for consistency.

Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6115 c046a42c-6fe2-441c-8c8c-71466251a162
2008-12-20 23:41:32 +00:00
pbrook fe76d97653 Implement flush-to-zero mode (denormal results are replaced with zero).
Signed-off-by: Paul Brook <paul@codesourcery.com>


git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6107 c046a42c-6fe2-441c-8c8c-71466251a162
2008-12-19 14:33:59 +00:00
pbrook 5c7908ed23 Implement default-NaN mode.
Signed-off-by: Paul Brook <paul@codesourcery.com>


git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6106 c046a42c-6fe2-441c-8c8c-71466251a162
2008-12-19 13:53:37 +00:00
pbrook 69397542d6 Correctly normalize values and handle zero inputs to scalbn functions.
Signed-off-by: Paul Brook <paul@codesourcery.com>


git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6102 c046a42c-6fe2-441c-8c8c-71466251a162
2008-12-19 12:59:28 +00:00
aurel32 dadd71a777 fp: fix float32_is_infinity()
Thanks to Laurent Desnogues for the hint.

Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6089 c046a42c-6fe2-441c-8c8c-71466251a162
2008-12-18 22:43:16 +00:00
aurel32 8d6c92b6b1 softfloat-native: improve correctness of floatXX_is_neg()
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6059 c046a42c-6fe2-441c-8c8c-71466251a162
2008-12-15 22:07:50 +00:00
aurel32 c52ab6f585 fp: add floatXX_is_infinity(), floatXX_is_neg(), floatXX_is_zero()
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6050 c046a42c-6fe2-441c-8c8c-71466251a162
2008-12-15 17:14:20 +00:00
aurel32 1b2ad2ec7a softfloat-native: fix *nan()
Fix float64_is_nan()
Fix floatx80_is_signaling_nan()
Add floatx80_is_nan()

Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6049 c046a42c-6fe2-441c-8c8c-71466251a162
2008-12-15 17:14:12 +00:00
aurel32 30e7a22eba Use float_relation_* constants
Use float_relation_* constants rather than magic numbers in
softfloat-native comparison routines.

Signed-off-by: Nathan Froyd <froydnj@codesourcery.com>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6025 c046a42c-6fe2-441c-8c8c-71466251a162
2008-12-14 11:12:02 +00:00
aurel32 629bd74a4f softfloat-native: add float32_is_nan()
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6002 c046a42c-6fe2-441c-8c8c-71466251a162
2008-12-13 11:46:15 +00:00
blueswir1 1d6198c3b0 Remove unnecessary trailing newlines
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6000 c046a42c-6fe2-441c-8c8c-71466251a162
2008-12-13 09:32:43 +00:00
blueswir1 d07cca02aa Add native softfloat fpu functions (Christoph Egger)
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5775 c046a42c-6fe2-441c-8c8c-71466251a162
2008-11-22 20:17:37 +00:00
malc b29fe3ed48 Preliminary AIX support
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5732 c046a42c-6fe2-441c-8c8c-71466251a162
2008-11-18 01:42:22 +00:00
pbrook 9027db892a Fix ARM default NaN.
Signed-off-by: Paul Brook <paul@codesourcery.com>


git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5618 c046a42c-6fe2-441c-8c8c-71466251a162
2008-11-04 12:33:21 +00:00
blueswir1 b1d8e52e63 Fix undeclared symbol warnings from sparse
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5539 c046a42c-6fe2-441c-8c8c-71466251a162
2008-10-26 13:43:07 +00:00
blueswir1 b55266b5a2 Suppress gcc 4.x -Wpointer-sign (included in -Wall) warnings
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5275 c046a42c-6fe2-441c-8c8c-71466251a162
2008-09-20 08:07:15 +00:00
blueswir1 7c2a9d0997 Fix math warnings on OpenBSD -current
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5077 c046a42c-6fe2-441c-8c8c-71466251a162
2008-08-24 10:29:29 +00:00
blueswir1 128ab2ff50 Preliminary OpenBSD host support (based on OpenBSD patches by Todd T. Fries)
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5012 c046a42c-6fe2-441c-8c8c-71466251a162
2008-08-15 18:33:42 +00:00
ths 85016c983c Assortment of soft-float fixes, by Aurelien Jarno.
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@3860 c046a42c-6fe2-441c-8c8c-71466251a162
2007-12-25 23:59:51 +00:00
blueswir1 1f58732916 128-bit float support for user mode
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@3740 c046a42c-6fe2-441c-8c8c-71466251a162
2007-11-25 18:40:20 +00:00
blueswir1 cd8a25337e Fix more typos in softloat code (Eduardo Felipe)
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@3716 c046a42c-6fe2-441c-8c8c-71466251a162
2007-11-21 18:57:44 +00:00
pbrook a1b91bb406 Fix typo in softfloat code.
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@3714 c046a42c-6fe2-441c-8c8c-71466251a162
2007-11-21 15:32:12 +00:00
pbrook f090c9d4ad Add strict checking mode for softfp code.
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@3688 c046a42c-6fe2-441c-8c8c-71466251a162
2007-11-18 14:33:24 +00:00
ths 5a6932d51d Fix NaN handling for MIPS and HPPA.
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@3655 c046a42c-6fe2-441c-8c8c-71466251a162
2007-11-16 14:57:36 +00:00
pbrook 9ee6e8bb85 ARMv7 support.
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@3572 c046a42c-6fe2-441c-8c8c-71466251a162
2007-11-11 00:04:49 +00:00
ths 5fafdf24ef find -type f | xargs sed -i 's/[\t ]$//g' # on most files
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@3173 c046a42c-6fe2-441c-8c8c-71466251a162
2007-09-16 21:08:06 +00:00
ths 924b2c07cd Add proper float*_is_nan prototypes.
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@2902 c046a42c-6fe2-441c-8c8c-71466251a162
2007-05-31 16:17:52 +00:00
ths b645bb4885 Fix softfloat NaN handling.
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@2805 c046a42c-6fe2-441c-8c8c-71466251a162
2007-05-11 17:10:14 +00:00
ths fc81ba536b Check that HOST_SOLARIS is defined before relying on its value.
Spotted by Joachim Henke.


git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@2712 c046a42c-6fe2-441c-8c8c-71466251a162
2007-04-22 17:16:54 +00:00
ths c94655b0b5 Updated Solaris isinf support, by Juergen Keil and Ben Taylor.
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@2696 c046a42c-6fe2-441c-8c8c-71466251a162
2007-04-17 21:57:02 +00:00
ths 0475a5ca54 Solaris 9/x86 support, by Ben Taylor.
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@2577 c046a42c-6fe2-441c-8c8c-71466251a162
2007-04-01 18:54:44 +00:00
j_mayer 3430b0be36 Ooops... Typo.
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@2520 c046a42c-6fe2-441c-8c8c-71466251a162
2007-03-20 22:25:37 +00:00
j_mayer 75d62a5856 Add missing softfloat helpers.
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@2518 c046a42c-6fe2-441c-8c8c-71466251a162
2007-03-20 22:10:42 +00:00
ths 63a654bb39 trunc() for Solaris 9 / SPARC, by Juergen Keil.
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@2508 c046a42c-6fe2-441c-8c8c-71466251a162
2007-03-19 16:46:07 +00:00
bellard 750afe93fd avoid using char when it is not necessary
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@2204 c046a42c-6fe2-441c-8c8c-71466251a162
2006-10-28 19:27:11 +00:00