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2021-05-16softfloat: Use mulu64 for mul64To128Richard Henderson1-20/+3
Via host-utils.h, we use a host widening multiply for 64-bit hosts, and a common subroutine for 32-bit hosts. Reviewed-by: Alex Bennée <alex.bennee@linaro.org> Reviewed-by: David Hildenbrand <david@redhat.com> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2021-05-16softfloat: Move muladd_floats to softfloat-parts.c.incRichard Henderson6-214/+342
Rename to parts$N_muladd. Implement float128_muladd with FloatParts128. Reviewed-by: Alex Bennée <alex.bennee@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2021-05-16softfloat: Move mul_floats to softfloat-parts.c.incRichard Henderson2-129/+128
Rename to parts$N_mul. Reimplement float128_mul with FloatParts128. Reviewed-by: Alex Bennée <alex.bennee@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2021-05-16softfloat: Implement float128_add/sub via partsRichard Henderson1-221/+36
Replace the existing Berkeley implementation with the FloatParts implementation. Reviewed-by: Alex Bennée <alex.bennee@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2021-05-16softfloat: Move addsub_floats to softfloat-parts.c.incRichard Henderson3-141/+255
In preparation for implementing multiple sizes. Rename to parts_addsub, split out parts_add/sub_normal for future reuse with muladd. Reviewed-by: Alex Bennée <alex.bennee@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2021-05-16softfloat: Use uadd64_carry, usub64_borrow in softfloat-macros.hRichard Henderson1-70/+25
Use compiler support for carry arithmetic. Reviewed-by: Alex Bennée <alex.bennee@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2021-05-16softfloat: Move round_canonical to softfloat-parts.c.incRichard Henderson2-155/+192
At the same time, convert to pointers, renaming to parts$N_uncanon, and define a macro for parts_uncanon using QEMU_GENERIC. Reviewed-by: Alex Bennée <alex.bennee@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2021-05-16softfloat: Move sf_canonicalize to softfloat-parts.c.incRichard Henderson2-38/+112
At the same time, convert to pointers, rename to parts$N_canonicalize and define a macro for parts_canonicalize using QEMU_GENERIC. Rearrange the cases to recognize float_class_normal as early as possible. Reviewed-by: Alex Bennée <alex.bennee@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2021-05-16softfloat: Move pick_nan_muladd to softfloat-parts.c.incRichard Henderson2-40/+53
At the same time, convert to pointers, rename to pick_nan_muladd$N and define a macro for pick_nan_muladd using QEMU_GENERIC. Reviewed-by: David Hildenbrand <david@redhat.com> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2021-05-16softfloat: Move pick_nan to softfloat-parts.c.incRichard Henderson2-27/+60
At the same time, convert to pointers, rename to parts$N_pick_nan and define a macro for parts_pick_nan using QEMU_GENERIC. Reviewed-by: David Hildenbrand <david@redhat.com> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2021-05-16softfloat: Move return_nan to softfloat-parts.c.incRichard Henderson2-20/+62
At the same time, convert to pointers, rename to return_nan$N and define a macro for return_nan using QEMU_GENERIC. Reviewed-by: David Hildenbrand <david@redhat.com> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2021-05-16softfloat: Convert float128_default_nan to partsRichard Henderson2-13/+23
Reviewed-by: Alex Bennée <alex.bennee@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2021-05-16softfloat: Convert float128_silence_nan to partsRichard Henderson2-32/+89
This is the minimal change that also introduces float128_params, float128_unpack_raw, and float128_pack_raw without running into unused symbol Werrors. Reviewed-by: Alex Bennée <alex.bennee@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2021-05-16softfloat: Rearrange FloatParts64Richard Henderson1-2/+12
Shuffle the fraction to the end, otherwise sort by size. Add frac_hi and frac_lo members to alias frac. Reviewed-by: Alex Bennée <alex.bennee@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2021-05-16softfloat: Use pointers with parts_silence_nanRichard Henderson2-13/+20
At the same time, rename to parts64_silence_nan, split out parts_silence_nan_frac, and define a macro for parts_silence_nan. Reviewed-by: Alex Bennée <alex.bennee@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2021-05-16softfloat: Use pointers with ftype_round_pack_canonicalRichard Henderson1-63/+68
Reviewed-by: Alex Bennée <alex.bennee@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2021-05-16softfloat: Use pointers with ftype_unpack_canonicalRichard Henderson1-189/+320
Reviewed-by: Alex Bennée <alex.bennee@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2021-05-16softfloat: Use pointers with ftype_pack_rawRichard Henderson1-20/+24
Reviewed-by: Alex Bennée <alex.bennee@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2021-05-16softfloat: Use pointers with pack_rawRichard Henderson1-8/+13
At the same time, rename to pack_raw64. Reviewed-by: Alex Bennée <alex.bennee@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2021-05-16softfloat: Use pointers with ftype_unpack_rawRichard Henderson1-28/+48
Reviewed-by: Alex Bennée <alex.bennee@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2021-05-16softfloat: Use pointers with unpack_rawRichard Henderson1-10/+19
At the same time, rename to unpack_raw64. Reviewed-by: Alex Bennée <alex.bennee@linaro.org> Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2021-05-16softfloat: Use pointers with parts_default_nanRichard Henderson2-17/+34
At the same time, rename to parts64_default_nan and add a macro for parts_default_nan. This will be flushed out once 128-bit support is added. Reviewed-by: David Hildenbrand <david@redhat.com> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2021-05-16softfloat: Move type-specific pack/unpack routinesRichard Henderson1-53/+56
In preparation from moving sf_canonicalize. Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Reviewed-by: David Hildenbrand <david@redhat.com> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2021-05-16softfloat: Rename FloatParts to FloatParts64Richard Henderson2-184/+184
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Reviewed-by: David Hildenbrand <david@redhat.com> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2021-05-16softfloat: Do not produce a default_nan from parts_silence_nanRichard Henderson1-6/+5
Require default_nan_mode to be set instead. Reviewed-by: Alex Bennée <alex.bennee@linaro.org> Reviewed-by: David Hildenbrand <david@redhat.com> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2021-05-16target/mips: Set set_default_nan_mode with set_snan_bit_is_oneRichard Henderson1-2/+8
This behavior is currently hard-coded in parts_silence_nan, but setting this bit properly will allow this to be cleaned up. Reviewed-by: Alex Bennée <alex.bennee@linaro.org> Reviewed-by: David Hildenbrand <david@redhat.com> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2021-05-16softfloat: fix return_nan vs default_nan_modeRichard Henderson1-12/+7
Do not call parts_silence_nan when default_nan_mode is in effect. This will avoid an assert in a later patch. Reviewed-by: Alex Bennée <alex.bennee@linaro.org> Reviewed-by: David Hildenbrand <david@redhat.com> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2021-05-16softfloat: Use return_nan in float_to_floatRichard Henderson1-7/+1
Reviewed-by: Alex Bennée <alex.bennee@linaro.org> Reviewed-by: David Hildenbrand <david@redhat.com> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2021-05-16softfloat: Add float_cmask and constantsRichard Henderson1-7/+23
Testing more than one class at a time is better done with masks. This reduces the static branch count. Reviewed-by: Alex Bennée <alex.bennee@linaro.org> Reviewed-by: David Hildenbrand <david@redhat.com> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2021-05-16softfloat: Tidy a * b + inf returnRichard Henderson1-3/+2
No reason to set values in 'a', when we already have float_class_inf in 'c', and can flip that sign. Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Reviewed-by: Alex Bennée <alex.bennee@linaro.org> Reviewed-by: David Hildenbrand <david@redhat.com> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2021-05-16softfloat: Use float_raise in more placesRichard Henderson1-43/+44
We have been somewhat inconsistent about when to use float_raise and when to or in the bit by hand. Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Reviewed-by: David Hildenbrand <david@redhat.com> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2021-05-16softfloat: Inline float_raiseRichard Henderson2-13/+4
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Reviewed-by: David Hildenbrand <david@redhat.com> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2021-05-16softfloat: Move the binary point to the msbRichard Henderson1-103/+66
Rather than point the binary point at msb-1, put it at the msb. Use uadd64_overflow to detect when addition overflows instead of DECOMPOSED_OVERFLOW_BIT. This reduces the number of special cases within the code, such as shifting an int64_t either left or right during conversion. Reviewed-by: Alex Bennée <alex.bennee@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2021-05-16tests/fp: add quad support to the benchmark utilityAlex Bennée1-5/+83
Currently this only support softfloat calculations because working out if the hardware supports 128 bit floats needs configure magic. The 3 op muladd operation is currently unimplemented so commented out for now. Reviewed-by: David Hildenbrand <david@redhat.com> Signed-off-by: Alex Bennée <alex.bennee@linaro.org> Message-Id: <20201020163738.27700-8-alex.bennee@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2021-05-16accel/tcg: Use add/sub overflow routines in tcg-runtime-gvec.cRichard Henderson1-20/+16
Obvious uses of the new functions. Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Reviewed-by: Alex Bennée <alex.bennee@linaro.org> Reviewed-by: David Hildenbrand <david@redhat.com> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2021-05-16qemu/host-utils: Add wrappers for carry builtinsRichard Henderson1-0/+50
These builtins came in clang 3.8, but are not present in gcc through version 11. Even in clang the optimization is only ideal on x86_64, but never worse than the hand-coding that we currently do. Reviewed-by: Alex Bennée <alex.bennee@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2021-05-16qemu/host-utils: Add wrappers for overflow builtinsRichard Henderson1-0/+225
These builtins came in with gcc 5 and clang 3.8, which are slightly newer than our supported minimum compiler versions. Reviewed-by: Alex Bennée <alex.bennee@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2021-05-16qemu/host-utils: Use __builtin_bitreverseNRichard Henderson1-0/+16
Clang has added some builtins for these operations; use them if available. Reviewed-by: Alex Bennée <alex.bennee@linaro.org> Reviewed-by: David Hildenbrand <david@redhat.com> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2021-05-15linux-user/s390x: Clean up signal.cRichard Henderson1-24/+39
Reorder the function bodies to correspond to the kernel source. Signed-off-by: Richard Henderson <richard.henderson@linaro.org> Reviewed-by: David Hildenbrand <david@redhat.com> Message-Id: <20210428193408.233706-15-richard.henderson@linaro.org> Signed-off-by: Laurent Vivier <laurent@vivier.eu>
2021-05-15linux-user/s390x: Add build asserts for sigset sizesRichard Henderson1-0/+5
At point of usage, it's not immediately obvious that we don't need a loop to copy these arrays. Signed-off-by: Richard Henderson <richard.henderson@linaro.org> Reviewed-by: David Hildenbrand <david@redhat.com> Message-Id: <20210428193408.233706-14-richard.henderson@linaro.org> Signed-off-by: Laurent Vivier <laurent@vivier.eu>
2021-05-15linux-user/s390x: Fix frame_addr corruption in setup_frameRichard Henderson1-1/+1
The original value of frame_addr is still required for its use in the call to unlock_user_struct below. Signed-off-by: Richard Henderson <richard.henderson@linaro.org> Reviewed-by: David Hildenbrand <david@redhat.com> Message-Id: <20210428193408.233706-13-richard.henderson@linaro.org> Signed-off-by: Laurent Vivier <laurent@vivier.eu>
2021-05-15linux-user/s390x: Add stub sigframe argument for last_breakRichard Henderson1-6/+10
In order to properly present these arguments, we need to add code to target/s390x to record LowCore parameters for user-only. But in the meantime, at least zero the missing last_break argument, and fixup the comment style in the vicinity. Signed-off-by: Richard Henderson <richard.henderson@linaro.org> Reviewed-by: David Hildenbrand <david@redhat.com> Message-Id: <20210428193408.233706-12-richard.henderson@linaro.org> Signed-off-by: Laurent Vivier <laurent@vivier.eu>
2021-05-15linux-user/s390x: Set psw.mask properly for the signal handlerRichard Henderson1-0/+6
Note that PSW_ADDR_{64,32} are called PSW_MASK_{EA,BA} in the kernel source. Signed-off-by: Richard Henderson <richard.henderson@linaro.org> Reviewed-by: David Hildenbrand <david@redhat.com> Message-Id: <20210428193408.233706-11-richard.henderson@linaro.org> Signed-off-by: Laurent Vivier <laurent@vivier.eu>
2021-05-15linux-user/s390x: Clean up single-use gotos in signal.cRichard Henderson1-21/+8
Signed-off-by: Richard Henderson <richard.henderson@linaro.org> Reviewed-by: David Hildenbrand <david@redhat.com> Message-Id: <20210428193408.233706-10-richard.henderson@linaro.org> Signed-off-by: Laurent Vivier <laurent@vivier.eu>
2021-05-15linux-user/s390x: Tidy save_sigregsRichard Henderson1-4/+6
The "save" routines copied from the kernel, which are currently commented out, are unnecessary in qemu. We can copy from env where the kernel needs special instructions. Fix comment style. Signed-off-by: Richard Henderson <richard.henderson@linaro.org> Reviewed-by: David Hildenbrand <david@redhat.com> Message-Id: <20210428193408.233706-9-richard.henderson@linaro.org> Signed-off-by: Laurent Vivier <laurent@vivier.eu>
2021-05-15linux-user/s390x: Use tswap_sigset in setup_rt_frameRichard Henderson1-5/+1
Signed-off-by: Richard Henderson <richard.henderson@linaro.org> Reviewed-by: David Hildenbrand <david@redhat.com> Message-Id: <20210428193408.233706-8-richard.henderson@linaro.org> Signed-off-by: Laurent Vivier <laurent@vivier.eu>
2021-05-15linux-user/s390x: Fix sigcontext sregs valueRichard Henderson1-1/+1
Using the host address of &frame->sregs is incorrect. We need the guest address. Signed-off-by: Richard Henderson <richard.henderson@linaro.org> Reviewed-by: David Hildenbrand <david@redhat.com> Message-Id: <20210428193408.233706-7-richard.henderson@linaro.org> Signed-off-by: Laurent Vivier <laurent@vivier.eu>
2021-05-15linux-user/s390x: Fix trace in restore_regsRichard Henderson1-2/+3
Directly reading sc->regs.psw.addr misses the bswap that may be performed by __get_user. Signed-off-by: Richard Henderson <richard.henderson@linaro.org> Reviewed-by: David Hildenbrand <david@redhat.com> Message-Id: <20210428193408.233706-6-richard.henderson@linaro.org> Signed-off-by: Laurent Vivier <laurent@vivier.eu>
2021-05-15linux-user/s390x: Remove restore_sigregs return valueRichard Henderson1-11/+3
The function cannot fail. Signed-off-by: Richard Henderson <richard.henderson@linaro.org> Reviewed-by: David Hildenbrand <david@redhat.com> Message-Id: <20210428193408.233706-5-richard.henderson@linaro.org> Signed-off-by: Laurent Vivier <laurent@vivier.eu>
2021-05-15linux-user/s390x: Remove PSW_ADDR_AMODERichard Henderson1-11/+6
This is an unnecessary complication since we only support 64-bit mode. Signed-off-by: Richard Henderson <richard.henderson@linaro.org> Reviewed-by: David Hildenbrand <david@redhat.com> Message-Id: <20210428193408.233706-4-richard.henderson@linaro.org> Signed-off-by: Laurent Vivier <laurent@vivier.eu>
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