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path: root/target-arm/neon_helper.c
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2011-05-23target-arm: Signal InvalidOp for Neon GE and GT compares of QNaNPeter Maydell
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>
2011-04-17move helpers.h to helper.hLluís
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>
2011-04-13target-arm: Don't overflow when calculating value for signed VABALPeter Maydell
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>
2011-04-04target-arm: Make Neon helper routines use correct FP statusPeter Maydell
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>
2011-04-04target-arm: Use global env in neon_helper.c helpersPeter Maydell
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>
2011-04-03target-arm: Use new softfloat min/max functions for VMAX, VMINPeter Maydell
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>
2011-04-03target-arm: Correct ABD's handling of negative zeroesPeter Maydell
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>
2011-04-03target-arm: Return right result for Neon comparison with NaNsPeter Maydell
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>
2011-04-03target-arm/neon_helper.c: Use make_float32/float32_val macrosPeter Maydell
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>
2011-02-20target-arm: Fix unsigned VQRSHL by large shift countsPeter Maydell
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>
2011-02-20target-arm: Fix signed VQRSHL by large shift countsPeter Maydell
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>
2011-02-20target-arm: Fix saturated values for Neon right shiftsPeter Maydell
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>
2011-02-20target-arm: fix unsigned 64 bit right shifts.Christophe Lyon
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>
2011-02-20target-arm: Fix unsigned VRSHL.s8 and .s16 right shifts by type widthChristophe Lyon
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>
2011-02-20target-arm: Fix signed VRSHL by large shift countsPeter Maydell
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>
2011-02-20target-arm: Fix rounding constant addition for Neon shiftsChristophe Lyon
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>
2011-02-20target-arm: Move Neon VZIP to helper functionsPeter Maydell
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>
2011-02-20target-arm: Move Neon VUZP to helper functionsPeter Maydell
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>
2011-02-20target-arm: Implement VMULL.P8Peter Maydell
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>
2011-02-10target-arm: Remove stray #include from middle of neon_helper.cPeter Maydell
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>
2011-02-09target-arm: Fix 32 bit signed saturating narrowPeter Maydell
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>
2011-02-09target-arm: Fix VQMOVUN Neon instruction.Juha Riihimäki
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>
2011-02-04Set the right overflow bit for neon 32 and 64 bit saturating add/sub.Christophe Lyon
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>
2011-01-29target-arm: Fix Neon VQ(R)DMULH.S16 instructionsJuha Riihimäki
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>
2011-01-12ARM: add neon helpers for VQSHLUJuha Riihimäki
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>
2010-12-27target-arm: Correct result in saturating cases for VQSHL of s8/16/32Peter Maydell
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>
2010-12-27target-arm: remove pointless else clause in VQSHL of u64Juha Riihimäki
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>
2010-12-27target-arm: Fix VQSHL of signed 64 bit values by shift counts >= 64Peter Maydell
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>
2010-12-27target-arm: Fix VQSHL of signed 64 bit valuesJuha Riihimäki
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>
2009-10-27target-arm: fix neon shift helper functionsJuha Riihimäki
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>
2009-07-27rename WORDS_BIGENDIAN to HOST_WORDS_BIGENDIANJuan Quintela
Signed-off-by: Juan Quintela <quintela@redhat.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2009-05-09Fixe ARM NEON vrshl.Paul Brook
Signed-off-by: Paul Brook <paul@codesourcery.com>
2008-04-11Fix few spelling issues in commentsaurel32
(Stefan Weil) git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@4187 c046a42c-6fe2-441c-8c8c-71466251a162
2008-03-31ARM TCG conversion 15/16.pbrook
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@4152 c046a42c-6fe2-441c-8c8c-71466251a162
2008-03-31ARM TCG conversion 14/16.pbrook
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@4151 c046a42c-6fe2-441c-8c8c-71466251a162
generated by cgit v1.2.3 (git 2.26.2) at 2024-12-15 11:10:41 +0000