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2011-01-06softfloat: Implement flushing input denormals to zeroPeter Maydell2-3/+123
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>
2011-01-06target-ppc: Implement correct NaN propagation rulesAurelien Jarno1-2/+17
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>
2011-01-06target-mips: Implement correct NaN propagation rulesAurelien Jarno1-0/+27
Implement the correct NaN propagation rules for MIPS targets by providing an appropriate pickNaN function. Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2011-01-06softfloat: use float{32,64,x80,128}_maybe_silence_nan()Aurelien Jarno1-43/+16
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>
2011-01-06softfloat: add float{x80,128}_maybe_silence_nan()Aurelien Jarno2-0/+48
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>
2011-01-06softfloat: fix float{32,64}_maybe_silence_nan() for MIPSAurelien Jarno1-6/+14
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>
2011-01-06softfloat: rename *IsNaN variables to *IsQuietNaNAurelien Jarno1-16/+20
Similarly to what has been done in commit 185698715dfb18c82ad2a5dbc169908602d43e81 rename the misnamed *IsNaN variables into *IsQuietNaN. Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2011-01-06softfloat: remove HPPA specific codeAurelien Jarno1-5/+1
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>
2011-01-02target-arm: Implement correct NaN propagation rulesPeter Maydell1-0/+23
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>
2011-01-02softfloat: abstract out target-specific NaN propagation rulesPeter Maydell1-60/+100
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>
2011-01-02softfloat: Rename float*_is_nan() functions to float*_is_quiet_nan()Peter Maydell4-22/+22
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>
2010-12-07softfloat: Add float/double to 16 bit integer conversion functionsPeter Maydell2-0/+140
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>
2010-12-07softfloat: Add float*_maybe_silence_nan() functionsPeter Maydell2-0/+40
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>
2010-12-07softfloat: Add float*_is_any_nan() functionsPeter Maydell1-0/+10
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>
2010-07-13softfloat: add float32_exp2()Aurelien Jarno2-0/+82
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2010-03-07softfloat: remove dead assignments, spotted by clangBlue Swirl1-8/+4
Value stored to 'bSign' is never read. Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
2010-02-23target-alpha: Split up FPCR value into separate fields.Richard Henderson1-1/+0
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 ba0e276db4b51bd2255a5d5ff8902c70d32ade40. Signed-off-by: Richard Henderson <rth@twiddle.net> Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2010-02-06arm host: fix compiler warningStefan Weil2-27/+0
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>
2009-12-13target-alpha: Fixes for alpha-linux syscalls.Richard Henderson1-0/+1
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>
2009-12-13target-alpha: Enable softfloat.Richard Henderson1-2/+2
Signed-off-by: Richard Henderson <rth@twiddle.net> Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2009-12-13Silence softfloat warnings on OpenSolarisAndreas Färber1-1/+1
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>
2009-11-29Add support for GNU/kFreeBSDAurelien Jarno2-3/+5
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2009-11-19ARM FP16 supportPaul Brook2-0/+144
Implement the ARM VFP half precision floating point extensions. Signed-off-by: Paul Brook <paul@codesourcery.com>
2009-07-27rename NEEDS_LIBSUNMATH to CONFIG_NEEDS_LIBSUNMATHJuan Quintela2-2/+2
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>
2009-07-27rename WORDS_BIGENDIAN to HOST_WORDS_BIGENDIANJuan Quintela1-1/+1
Signed-off-by: Juan Quintela <quintela@redhat.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2009-07-27rename HOST_BSD to CONFIG_BSDJuan Quintela3-5/+5
Signed-off-by: Juan Quintela <quintela@redhat.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2009-07-27change HOST_SOLARIS to CONFIG_SOLARIS{_VERSION}Juan Quintela3-10/+14
Signed-off-by: Juan Quintela <quintela@redhat.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2009-04-13Fix OpenSolaris gcc4 warnings: iovec type mismatches, missing 'static'blueswir11-2/+2
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@7103 c046a42c-6fe2-441c-8c8c-71466251a162
2009-04-13Fix OpenSolaris softfloat warningsblueswir12-1/+4
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@7102 c046a42c-6fe2-441c-8c8c-71466251a162
2009-03-08Rename one more _BSD to HOST_BSD (spotted by Hasso Tepper)blueswir11-1/+1
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6782 c046a42c-6fe2-441c-8c8c-71466251a162
2009-03-08Rename _BSD to HOST_BSD so that it's more obvious that it's defined by configureblueswir12-4/+5
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6775 c046a42c-6fe2-441c-8c8c-71466251a162
2009-03-07Sparse fixes: dubious mixing of bitwise and logical operationsblueswir11-4/+4
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6741 c046a42c-6fe2-441c-8c8c-71466251a162
2009-02-05soft-float: add float32_log2() and float64_log2()aurel322-0/+95
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net> git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6518 c046a42c-6fe2-441c-8c8c-71466251a162
2009-02-04softfloat: add a 1.0 constant for float32 and float64aurel321-0/+2
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net> git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6514 c046a42c-6fe2-441c-8c8c-71466251a162
2009-01-25Add static qualifier to local functionsmalc1-1/+1
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6436 c046a42c-6fe2-441c-8c8c-71466251a162
2009-01-14Remove all traces of __powerpc__malc1-1/+1
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
2008-12-20softfloat-native: fix type of float_rounding_modeaurel321-2/+2
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
2008-12-19Implement flush-to-zero mode (denormal results are replaced with zero).pbrook2-3/+23
Signed-off-by: Paul Brook <paul@codesourcery.com> git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6107 c046a42c-6fe2-441c-8c8c-71466251a162
2008-12-19Implement default-NaN mode.pbrook2-0/+23
Signed-off-by: Paul Brook <paul@codesourcery.com> git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6106 c046a42c-6fe2-441c-8c8c-71466251a162
2008-12-19Correctly normalize values and handle zero inputs to scalbn functions.pbrook1-8/+29
Signed-off-by: Paul Brook <paul@codesourcery.com> git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6102 c046a42c-6fe2-441c-8c8c-71466251a162
2008-12-18fp: fix float32_is_infinity()aurel321-1/+1
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
2008-12-15softfloat-native: improve correctness of floatXX_is_neg()aurel321-3/+9
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net> git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6059 c046a42c-6fe2-441c-8c8c-71466251a162
2008-12-15fp: add floatXX_is_infinity(), floatXX_is_neg(), floatXX_is_zero()aurel322-0/+105
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net> git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6050 c046a42c-6fe2-441c-8c8c-71466251a162
2008-12-15softfloat-native: fix *nan()aurel322-1/+15
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
2008-12-14Use float_relation_* constantsaurel321-24/+24
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
2008-12-13softfloat-native: add float32_is_nan()aurel322-0/+10
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net> git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6002 c046a42c-6fe2-441c-8c8c-71466251a162
2008-12-13Remove unnecessary trailing newlinesblueswir11-1/+0
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6000 c046a42c-6fe2-441c-8c8c-71466251a162
2008-11-22Add native softfloat fpu functions (Christoph Egger)blueswir11-2/+20
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5775 c046a42c-6fe2-441c-8c8c-71466251a162
2008-11-18Preliminary AIX supportmalc1-0/+2
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5732 c046a42c-6fe2-441c-8c8c-71466251a162
2008-11-04Fix ARM default NaN.pbrook1-2/+2
Signed-off-by: Paul Brook <paul@codesourcery.com> git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5618 c046a42c-6fe2-441c-8c8c-71466251a162
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