Commit Graph

38 Commits

Author SHA1 Message Date
Matthew Fernandez 8e31bf388e Correct spelling of licensed
Correct typos of "licenced" to "licensed".

Reviewed-by: Stefan Weil <weil@mail.berlios.de>
Reviewed-by: Andreas F=E4rber <andreas.faerber@web.de>
Signed-off-by: Matthew Fernandez <matthew.fernandez@gmail.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2011-07-23 11:26:12 -05:00
Peter Maydell 02da0b2d71 Revert "target-arm: Use global env in neon_helper.c helpers"
This effectively reverts commit 2a3f75b42a
so that we return to passing CPUState to helpers as an explicit parameter.
(There were a number of conflicts in target-arm/translate.c which had
to be resolved by hand so it is not a pure revert.)

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2011-06-22 15:01:41 +00:00
Peter Maydell aa47cfdd17 target-arm: Pass fp status pointer explicitly to neon fp helpers
Make the Neon helpers for various floating point operations take an
explicit pointer to the float_status they use, so they don't rely on
the global environment pointer any more. This also allows us to drop
the mul/sub/add helpers completely and just use the vfp versions.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2011-06-22 15:01:36 +00:00
Peter Maydell cab565c412 target-arm: Signal InvalidOp for Neon GE and GT compares of QNaN
If the input to a Neon float comparison is a quiet NaN, the ARM ARM
specifies that we should raise InvalidOp if the comparison is GE or GT
but not for EQ. (Signaling NaNs raise InvalidOp regardless). This means
only EQ should use the _quiet version of the comparison function.

We implement this by cleaning up the comparison helpers to call the
appopriate versions of the softfloat simple comparison functions
(float32_le and friends) rather than the generic float32_compare functions.
This makes them simple enough that they are clearer opencoded rather
than macroised.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2011-05-23 22:39:36 +02:00
Lluís 7b59220ef3 move helpers.h to helper.h
This provides a consistent naming scheme across all targets.

Signed-off-by: Lluís Vilanova <vilanova@ac.upc.edu>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2011-04-17 20:41:11 +02:00
Peter Maydell 4d9ad7f793 target-arm: Don't overflow when calculating value for signed VABAL
In the VABAL instruction we take the absolute difference of two
values of size x and store it in a result of size 2x. This means
we have to be careful to calculate the absolute difference using
a wide enough type that we don't accidentally overflow.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2011-04-13 20:47:50 +02:00
Peter Maydell cc49f21780 target-arm: Make Neon helper routines use correct FP status
Make the Neon helper routines use the correct FP status from
the CPUEnv rather than using a dummy static one. This means
they will correctly handle denormals and NaNs and will set
FPSCR exception bits properly.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2011-04-04 20:18:07 +02:00
Peter Maydell 2a3f75b42a target-arm: Use global env in neon_helper.c helpers
Use the global 'env' variable in the helper functions in neon_helper.c.
This means we don't need to pass env as an argument to them any more.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2011-04-04 20:18:06 +02:00
Peter Maydell 4a9f9cb24d target-arm: Use new softfloat min/max functions for VMAX, VMIN
Use the new softfloat min/max functions to implement the Neon VMAX
and VMIN instructions. This allows us to get the right behaviour
for NaN and negative zero.

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
Peter Maydell 79c18be7df target-arm: Correct ABD's handling of negative zeroes
Implement ABD by taking the absolute value of the difference
of the operands (as the ARM ARM specifies) rather than by
flipping the order of the operands to the subtract based
on the results of a comparison. The latter approch gives
the wrong answers for some edge cases like negative zero.

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
Peter Maydell c7498daea7 target-arm: Return right result for Neon comparison with NaNs
Fix the helper functions implementing the Neon floating point comparison
ops (VCGE, VCGT, VCEQ, VACGT, VACGE) to return the right answer when
one of the values being compared is a NaN.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2011-04-03 17:05:43 +02:00
Peter Maydell 51d852672c target-arm/neon_helper.c: Use make_float32/float32_val macros
Use the softfloat make_float32 and float32_val macros to convert between
softfloat's float32 type and raw uint32_t types, rather than private
conversion functions.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Nathan Froyd <froydnj@codesourcery.com>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2011-04-03 17:04:13 +02:00
Peter Maydell 33ebc29337 target-arm: Fix unsigned VQRSHL by large shift counts
Correctly handle VQRSHL of unsigned values by a shift count of the
width of the data type or larger, which must be special-cased in the
qrshl_u* helper functions.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2011-02-20 17:43:01 +01:00
Peter Maydell 7b6ecf5b3a target-arm: Fix signed VQRSHL by large shift counts
Handle the case of signed VQRSHL by a shift count of the width of the
data type or larger, which must be special cased in the qrshl_s*
helper functions.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2011-02-20 17:43:01 +01:00
Peter Maydell 960e623bfd target-arm: Fix saturated values for Neon right shifts
Fix value returned by signed 8 and 16 bit qrshl helpers
when the result has saturated.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2011-02-20 17:43:01 +01:00
Christophe Lyon 51e3930fc7 target-arm: fix unsigned 64 bit right shifts.
Fix range of shift amounts which always give 0 as result.

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>
2011-02-20 17:43:01 +01:00
Christophe Lyon b6c63b9891 target-arm: Fix unsigned VRSHL.s8 and .s16 right shifts by type width
Fix handling of unsigned VRSHL.s8 and .s16 right shifts by the type
width.

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>
2011-02-20 17:43:01 +01:00
Peter Maydell 0670a7b65b target-arm: Fix signed VRSHL by large shift counts
Correctly handle VRSHL of signed values by a shift count of the
width of the data type or larger, which must be special-cased in the
rshl_s* helper functions.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2011-02-20 17:43:01 +01:00
Christophe Lyon 4bd4ee072c target-arm: Fix rounding constant addition for Neon shifts
Handle cases where adding the rounding constant could overflow in Neon
shift instructions: VRSHR, VRSRA, VQRSHRN, VQRSHRUN, VRSHRN.

Signed-off-by: Christophe Lyon <christophe.lyon@st.com>
[peter.maydell@linaro.org: fix handling of large shifts in rshl_s32,
calculate signed saturated value as other functions do.]
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2011-02-20 17:43:01 +01:00
Peter Maydell d68a6f3a6d target-arm: Move Neon VZIP to helper functions
Move the implementation of the Neon VUZP unzip instruction from inline
code to helper functions. (At 50+ TCG ops it was well over the
recommended limit for coding inline.) The helper implementations also
give the correct answers where the inline implementation did not.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2011-02-20 17:31:53 +01:00
Peter Maydell 02acedf93d target-arm: Move Neon VUZP to helper functions
Move the implementation of the Neon VUZP unzip instruction from inline
code to helper functions. (At 50+ TCG ops it was well over the
recommended limit for coding inline.) The helper implementations also
fix the handling of the quadword version of the instruction.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2011-02-20 17:31:52 +01:00
Peter Maydell e5ca24cba9 target-arm: Implement VMULL.P8
Implement VMULL.P8 (the 32x32->64 version of the polynomial multiply
instruction).

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2011-02-20 17:26:15 +01:00
Peter Maydell f2f27b9f9b target-arm: Remove stray #include from middle of neon_helper.c
Remove a stray #include <stdio.h> from the middle of neon_helper.c:
it was harmless but pointless since we include stdio.h at the top
of the file anyway.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2011-02-10 21:21:30 +01:00
Peter Maydell cc2212c2f8 target-arm: Fix 32 bit signed saturating narrow
The returned value when doing saturating signed 64->32 bit
conversion of a negative number was incorrect due to a missing cast.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2011-02-09 19:37:48 +01:00
Juha Riihimäki af1bbf30c4 target-arm: Fix VQMOVUN Neon instruction.
VQMOVUN does a signed-to-unsigned saturating conversion. This is
different from both the signed-to-signed and unsigned-to-unsigned
conversions already implemented, so we need a new set of helper
functions (neon_unarrow_sat*).

Signed-off-by: Juha Riihimäki <juha.riihimaki@nokia.com>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2011-02-09 19:37:47 +01:00
Christophe Lyon 72902672dc Set the right overflow bit for neon 32 and 64 bit saturating add/sub.
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>
2011-02-04 20:57:41 +01:00
Juha Riihimäki 46eece9d89 target-arm: Fix Neon VQ(R)DMULH.S16 instructions
Correct an error in the implementation of the 16 bit
forms of VQ(R)DMULH, bringing them into line with the
32 bit implementation.

Signed-off-by: Juha Riihimäki <juha.riihimaki@nokia.com>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2011-01-29 15:16:29 +01:00
Juha Riihimäki 4ca4502c93 ARM: add neon helpers for VQSHLU
Add neon helper functions to implement VQSHLU, which is a
signed-to-unsigned version of VQSHL available only as an
immediate form.

Signed-off-by: Juha Riihimäki <juha.riihimaki@nokia.com>
Reviewed-by: Aurelien Jarno <aurelien@aurel32.net>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2011-01-12 00:06:06 +01:00
Peter Maydell a5d88f3e03 target-arm: Correct result in saturating cases for VQSHL of s8/16/32
Where VQSHL of a signed 8/16/32 bit value saturated, the result
value was not being calculated correctly (it should be either
the minimum or maximum value for the size of the signed type).

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2010-12-27 21:07:24 +01:00
Juha Riihimäki 620d791e34 target-arm: remove pointless else clause in VQSHL of u64
Remove a pointless else clause in the neon_qshl_u64 helper.

Signed-off-by: Juha Riihimäki <juha.riihimaki@nokia.com>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2010-12-27 21:07:16 +01:00
Peter Maydell eb7a3d7964 target-arm: Fix VQSHL of signed 64 bit values by shift counts >= 64
VQSHL of a signed 64 bit non-zero value by a shift count >= 64 should
saturate; return the correct value in this case.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2010-12-27 21:07:10 +01:00
Juha Riihimäki 4c9b70aeca target-arm: Fix VQSHL of signed 64 bit values
Add a missing '-' which meant that we were misinterpreting the shift
argument for VQSHL of 64 bit signed values and treating almost every
shift value as if it were an extremely large right shift.

Signed-off-by: Juha Riihimäki <juha.riihimaki@nokia.com>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2010-12-27 21:07:03 +01:00
Juha Riihimäki 50f67e95e2 target-arm: fix neon shift helper functions
Current code is broken at least on recent compilers, comparison
between signed and unsigned types yield incorrect code and render
the neon shift helper functions defunct. This is the third revision
of this patch, casting all comparisons with the sizeof operator to
signed ssize_t type to force comparisons to be between signed integral
types.

Signed-off-by: Juha Riihimäki <juha.riihimaki@nokia.com>
Acked-by: Laurent Desnogues <laurent.desnogues@gmail.com>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2009-10-27 09:46:26 +01:00
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
Paul Brook cb76e138d3 Fixe ARM NEON vrshl.
Signed-off-by: Paul Brook <paul@codesourcery.com>
2009-05-09 23:12:06 +01:00
aurel32 1654b2d6bf Fix few spelling issues in comments
(Stefan Weil)


git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@4187 c046a42c-6fe2-441c-8c8c-71466251a162
2008-04-11 04:55:07 +00:00
pbrook e677137d99 ARM TCG conversion 15/16.
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@4152 c046a42c-6fe2-441c-8c8c-71466251a162
2008-03-31 03:49:05 +00:00
pbrook ad69471ce5 ARM TCG conversion 14/16.
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@4151 c046a42c-6fe2-441c-8c8c-71466251a162
2008-03-31 03:48:30 +00:00