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2023-06-19amdgcn: implement vector div and mod libfuncsAndrew Stubbs9-47/+1052
Also divmod, but only for scalar modes, for now (because there are no complex int vectors yet). gcc/ChangeLog: * config/gcn/gcn.cc (gcn_expand_divmod_libfunc): New function. (gcn_init_libfuncs): Add div and mod functions for all modes. Add placeholders for divmod functions. (TARGET_EXPAND_DIVMOD_LIBFUNC): Define. libgcc/ChangeLog: * config/gcn/lib2-divmod-di.c: Reimplement like lib2-divmod.c. * config/gcn/lib2-divmod.c: Likewise. * config/gcn/lib2-gcn.h: Add new types and prototypes for all the new vector libfuncs. * config/gcn/t-amdgcn: Add new files. * config/gcn/amdgcn_veclib.h: New file. * config/gcn/lib2-vec_divmod-di.c: New file. * config/gcn/lib2-vec_divmod-hi.c: New file. * config/gcn/lib2-vec_divmod-qi.c: New file. * config/gcn/lib2-vec_divmod.c: New file. gcc/testsuite/ChangeLog: * gcc.dg/tree-ssa/predcom-2.c: Avoid vectors on amdgcn. * gcc.dg/unroll-8.c: Likewise. * gcc.dg/vect/slp-26.c: Change expected results on amdgdn. * lib/target-supports.exp (check_effective_target_vect_int_mod): Add amdgcn. (check_effective_target_divmod): Likewise. * gcc.target/gcn/simd-math-3-16.c: New test. * gcc.target/gcn/simd-math-3-2.c: New test. * gcc.target/gcn/simd-math-3-32.c: New test. * gcc.target/gcn/simd-math-3-4.c: New test. * gcc.target/gcn/simd-math-3-8.c: New test. * gcc.target/gcn/simd-math-3-char-16.c: New test. * gcc.target/gcn/simd-math-3-char-2.c: New test. * gcc.target/gcn/simd-math-3-char-32.c: New test. * gcc.target/gcn/simd-math-3-char-4.c: New test. * gcc.target/gcn/simd-math-3-char-8.c: New test. * gcc.target/gcn/simd-math-3-char-run-16.c: New test. * gcc.target/gcn/simd-math-3-char-run-2.c: New test. * gcc.target/gcn/simd-math-3-char-run-32.c: New test. * gcc.target/gcn/simd-math-3-char-run-4.c: New test. * gcc.target/gcn/simd-math-3-char-run-8.c: New test. * gcc.target/gcn/simd-math-3-char-run.c: New test. * gcc.target/gcn/simd-math-3-char.c: New test. * gcc.target/gcn/simd-math-3-long-16.c: New test. * gcc.target/gcn/simd-math-3-long-2.c: New test. * gcc.target/gcn/simd-math-3-long-32.c: New test. * gcc.target/gcn/simd-math-3-long-4.c: New test. * gcc.target/gcn/simd-math-3-long-8.c: New test. * gcc.target/gcn/simd-math-3-long-run-16.c: New test. * gcc.target/gcn/simd-math-3-long-run-2.c: New test. * gcc.target/gcn/simd-math-3-long-run-32.c: New test. * gcc.target/gcn/simd-math-3-long-run-4.c: New test. * gcc.target/gcn/simd-math-3-long-run-8.c: New test. * gcc.target/gcn/simd-math-3-long-run.c: New test. * gcc.target/gcn/simd-math-3-long.c: New test. * gcc.target/gcn/simd-math-3-run-16.c: New test. * gcc.target/gcn/simd-math-3-run-2.c: New test. * gcc.target/gcn/simd-math-3-run-32.c: New test. * gcc.target/gcn/simd-math-3-run-4.c: New test. * gcc.target/gcn/simd-math-3-run-8.c: New test. * gcc.target/gcn/simd-math-3-run.c: New test. * gcc.target/gcn/simd-math-3-short-16.c: New test. * gcc.target/gcn/simd-math-3-short-2.c: New test. * gcc.target/gcn/simd-math-3-short-32.c: New test. * gcc.target/gcn/simd-math-3-short-4.c: New test. * gcc.target/gcn/simd-math-3-short-8.c: New test. * gcc.target/gcn/simd-math-3-short-run-16.c: New test. * gcc.target/gcn/simd-math-3-short-run-2.c: New test. * gcc.target/gcn/simd-math-3-short-run-32.c: New test. * gcc.target/gcn/simd-math-3-short-run-4.c: New test. * gcc.target/gcn/simd-math-3-short-run-8.c: New test. * gcc.target/gcn/simd-math-3-short-run.c: New test. * gcc.target/gcn/simd-math-3-short.c: New test. * gcc.target/gcn/simd-math-3.c: New test. * gcc.target/gcn/simd-math-4-char-run.c: New test. * gcc.target/gcn/simd-math-4-char.c: New test. * gcc.target/gcn/simd-math-4-long-run.c: New test. * gcc.target/gcn/simd-math-4-long.c: New test. * gcc.target/gcn/simd-math-4-run.c: New test. * gcc.target/gcn/simd-math-4-short-run.c: New test. * gcc.target/gcn/simd-math-4-short.c: New test. * gcc.target/gcn/simd-math-4.c: New test. * gcc.target/gcn/simd-math-5-16.c: New test. * gcc.target/gcn/simd-math-5-32.c: New test. * gcc.target/gcn/simd-math-5-4.c: New test. * gcc.target/gcn/simd-math-5-8.c: New test. * gcc.target/gcn/simd-math-5-char-16.c: New test. * gcc.target/gcn/simd-math-5-char-32.c: New test. * gcc.target/gcn/simd-math-5-char-4.c: New test. * gcc.target/gcn/simd-math-5-char-8.c: New test. * gcc.target/gcn/simd-math-5-char-run-16.c: New test. * gcc.target/gcn/simd-math-5-char-run-32.c: New test. * gcc.target/gcn/simd-math-5-char-run-4.c: New test. * gcc.target/gcn/simd-math-5-char-run-8.c: New test. * gcc.target/gcn/simd-math-5-char-run.c: New test. * gcc.target/gcn/simd-math-5-char.c: New test. * gcc.target/gcn/simd-math-5-long-16.c: New test. * gcc.target/gcn/simd-math-5-long-32.c: New test. * gcc.target/gcn/simd-math-5-long-4.c: New test. * gcc.target/gcn/simd-math-5-long-8.c: New test. * gcc.target/gcn/simd-math-5-long-run-16.c: New test. * gcc.target/gcn/simd-math-5-long-run-32.c: New test. * gcc.target/gcn/simd-math-5-long-run-4.c: New test. * gcc.target/gcn/simd-math-5-long-run-8.c: New test. * gcc.target/gcn/simd-math-5-long-run.c: New test. * gcc.target/gcn/simd-math-5-long.c: New test. * gcc.target/gcn/simd-math-5-run-16.c: New test. * gcc.target/gcn/simd-math-5-run-32.c: New test. * gcc.target/gcn/simd-math-5-run-4.c: New test. * gcc.target/gcn/simd-math-5-run-8.c: New test. * gcc.target/gcn/simd-math-5-run.c: New test. * gcc.target/gcn/simd-math-5-short-16.c: New test. * gcc.target/gcn/simd-math-5-short-32.c: New test. * gcc.target/gcn/simd-math-5-short-4.c: New test. * gcc.target/gcn/simd-math-5-short-8.c: New test. * gcc.target/gcn/simd-math-5-short-run-16.c: New test. * gcc.target/gcn/simd-math-5-short-run-32.c: New test. * gcc.target/gcn/simd-math-5-short-run-4.c: New test. * gcc.target/gcn/simd-math-5-short-run-8.c: New test. * gcc.target/gcn/simd-math-5-short-run.c: New test. * gcc.target/gcn/simd-math-5-short.c: New test. * gcc.target/gcn/simd-math-5.c: New test.
2023-06-19amdgcn: Delete inactive libfuncsAndrew Stubbs3-126/+0
The HImode libfuncs weren't called and trying to enable them fails because TARGET_PROMOTE_FUNCTION_MODE wants to widen the arguments but the signedness isn't known. libgcc/ChangeLog: * config/gcn/lib2-gcn.h (QItype, UQItype, HItype, UHItype): Delete. (__divhi3, __modhi3, __udivhi3, __umodhi3): Delete. * config/gcn/t-amdgcn: Don't build lib2-divmod-hi.c. * config/gcn/lib2-divmod-hi.c: Removed.
2023-06-04libgcc: Use initarray section type for .init_stackKewen Lin3-3/+3
One of my workmates found there is a warning like: libgcc/config/rs6000/morestack.S:402: Warning: ignoring incorrect section type for .init_array.00000 when compiling libgcc/config/rs6000/morestack.S. Since commit r13-6545 touched that file recently, which was suspected to be responsible for this warning, I did some investigation and found this is a warning staying for a long time. For section .init_stack*, it's preferred to use section type SHT_INIT_ARRAY. So this patch is use "@init_array" to replace "@progbits". Although the warning is trivial, Segher suggested me to post this to fix it, in order to avoid any possible misunderstanding/confusion on the warning. As Alan confirmed, this doesn't require a premise check on if the existing binutils supports "@init_array" or not, "because if you want split-stack to work, you must link with gold, any version of binutils that has gold has an assembler that understands @init_array". (Thanks Alan!) libgcc/ChangeLog: * config/i386/morestack.S: Use @init_array rather than @progbits for section type of section .init_array. * config/rs6000/morestack.S: Likewise. * config/s390/morestack.S: Likewise.
2023-06-05MIPS: Add speculation_barrier supportYunQiang Su4-2/+94
speculation_barrier for MIPS needs sync+jr.hb (r2+), so we implement __speculation_barrier in libgcc, like arm32 does. gcc/ChangeLog: * config/mips/mips-protos.h (mips_emit_speculation_barrier): New prototype. * config/mips/mips.cc (speculation_barrier_libfunc): New static variable. (mips_init_libfuncs): Initialize it. (mips_emit_speculation_barrier): New function. * config/mips/mips.md (speculation_barrier): Call mips_emit_speculation_barrier. libgcc/ChangeLog: * config/mips/lib1funcs.S: New file. define __speculation_barrier and include mips16.S. * config/mips/t-mips: define LIB1ASMSRC as mips/lib1funcs.S. define LIB1ASMFUNCS as _speculation_barrier. set version info for __speculation_barrier. * config/mips/libgcc-mips.ver: New file. * config/mips/t-mips16: don't define LIB1ASMSRC as mips16.S included in lib1funcs.S now.
2023-05-19Darwin, libgcc : Adjust min version supported for the OS.Iain Sandoe5-8/+45
Tools from later versions of the OS deprecate or fail to support earlier OS revisions. Signed-off-by: Iain Sandoe <iain@sandoe.co.uk> libgcc/ChangeLog: * config.host: Arrange to set min Darwin OS versions from the configured host version. * config/darwin10-unwind-find-enc-func.c: Do not use current headers, but declare the nexessary structures locally to the versions in use for Mac OSX 10.6. * config/t-darwin: Amend to handle configured min OS versions. * config/t-darwin-min-1: New. * config/t-darwin-min-5: New. * config/t-darwin-min-8: New.
2023-05-02RISC-V: Enforce Libatomic LR/SC SEQ_CSTPatrick O'Neill1-2/+2
Replace LR.aq/SC.rl pairs with the SEQ_CST LR.aqrl/SC.rl pairs recommended by table A.6 of the ISA manual. 2023-04-27 Patrick O'Neill <patrick@rivosinc.com> libgcc/ChangeLog: * config/riscv/atomic.c: Change LR.aq/SC.rl pairs into sequentially consistent LR.aqrl/SC.rl pairs. Signed-off-by: Patrick O'Neill <patrick@rivosinc.com>
2023-05-01libgcc pru: Define TARGET_HAS_NO_HW_DIVIDEDimitar Dimitrov1-0/+3
This patch aligns the configuration to the actual PRU capabilities. It also reduces the size of the affected libgcc functions. For a real-world project using integer arithmetics the savings are significant: Before: text data bss dec hex filename 3688 865 544 5097 13e9 hc-sr04-range-sensor.elf With TARGET_HAS_NO_HW_DIVIDE defined: text data bss dec hex filename 2824 865 544 4233 1089 hc-sr04-range-sensor.elf Execution speed also appears to have improved. The moddi3 function is now executed in half the CPU cycles. libgcc/ChangeLog: * config/pru/t-pru (HOST_LIBGCC2_CFLAGS): Add -DTARGET_HAS_NO_HW_DIVIDE. Signed-off-by: Dimitar Dimitrov <dimitar@dinux.eu>
2023-04-27libgcc CRIS: Define TARGET_HAS_NO_HW_DIVIDEHans-Peter Nilsson1-0/+3
With this, execution time for e.g. __moddi3 go from 59 to 40 cycles in the "fast" case or from 290 to 200 cycles in the "slow" case (when the !TARGET_HAS_NO_HW_DIVIDE variant calls division and modulus functions for 32-bit SImode), as exposed by gcc.c-torture/execute/arith-rand-ll.c compiled for -march=v10. Unfortunately, it just puts a performance improvement "dent" of 0.07% in a arith-rand-ll.c-based performance test - where all loops are also reduced to 1/10. The size of every affected libgcc function is reduced to less than half and they are all now leaf functions. * config/cris/t-cris (HOST_LIBGCC2_CFLAGS): Add -DTARGET_HAS_NO_HW_DIVIDE.
2023-04-26RISCV: Inline subword atomic opsPatrick O'Neill1-0/+2
RISC-V has no support for subword atomic operations; code currently generates libatomic library calls. This patch changes the default behavior to inline subword atomic calls (using the same logic as the existing library call). Behavior can be specified using the -minline-atomics and -mno-inline-atomics command line flags. gcc/libgcc/config/riscv/atomic.c has the same logic implemented in asm. This will need to stay for backwards compatibility and the -mno-inline-atomics flag. 2023-04-18 Patrick O'Neill <patrick@rivosinc.com> gcc/ChangeLog: PR target/104338 * config/riscv/riscv-protos.h: Add helper function stubs. * config/riscv/riscv.cc: Add helper functions for subword masking. * config/riscv/riscv.opt: Add command-line flag. * config/riscv/sync.md: Add masking logic and inline asm for fetch_and_op, fetch_and_nand, CAS, and exchange ops. * doc/invoke.texi: Add blurb regarding command-line flag. libgcc/ChangeLog: PR target/104338 * config/riscv/atomic.c: Add reference to duplicate logic. gcc/testsuite/ChangeLog: PR target/104338 * gcc.target/riscv/inline-atomics-1.c: New test. * gcc.target/riscv/inline-atomics-2.c: New test. * gcc.target/riscv/inline-atomics-3.c: New test. * gcc.target/riscv/inline-atomics-4.c: New test. * gcc.target/riscv/inline-atomics-5.c: New test. * gcc.target/riscv/inline-atomics-6.c: New test. * gcc.target/riscv/inline-atomics-7.c: New test. * gcc.target/riscv/inline-atomics-8.c: New test. Signed-off-by: Patrick O'Neill <patrick@rivosinc.com> Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
2023-04-08PR target/109402: v850 (not v850e) variant of __muldi3() moves sp in ↵Tetsuma Hoshino1-2/+0
reversed direction [PR109402] muldi3 will deallocate stack space after the call to __save_r26_r31, then re-allocate the space a short while later. If an interrupt occurs in that window, it can clobber items on the stack. PR target/109402 libgcc/ * config/v850/lib1funcs.S (___muldi3): Remove unnecessary stack manipulations.
2023-04-05Add assember CFI directives to millicode division and remainder routines.John David Anglin1-0/+14
The millicode division and remainder routines trap division by zero. The unwinder needs these directives to unwind divide by zero traps. 2023-04-05 John David Anglin <danglin@gcc.gnu.org> libgcc/ChangeLog: PR target/109374 * config/pa/milli64.S (RETURN_COLUMN): Define. ($$divI): Add CFI directives. ($$divU): Likewise. ($$remI): Likewise. ($$remU): Likewise.
2023-03-19or1k: Do not clear existing FPU exceptions before updatingStafford Horne1-1/+0
We should always carry the exceptions forward. This bug was found when working on testing glibc math tests, many tests were failing with Overflow and Underflow flags not set. This was traced to here. libgcc/ChangeLog: * config/or1k/sfp-machine.h (FP_HANDLE_EXCEPTIONS): Remove statement clearing existing exceptions.
2023-03-13xtensa: add .note.GNU-stack section on linuxMax Filippov4-0/+24
gcc/ * config/xtensa/linux.h (TARGET_ASM_FILE_END): New macro. libgcc/ * config/xtensa/crti.S: Add .note.GNU-stack section on linux. * config/xtensa/crtn.S: Likewise. * config/xtensa/lib1funcs.S: Likewise. * config/xtensa/lib2funcs.S: Likewise.
2023-03-13aarch64: Add bfloat16_t support for aarch64Jakub Jelinek3-3/+19
x86_64/i686 has for a few months working std::bfloat16_t support, __bf16 there is no longer a storage only type, but can be used for arithmetics and is supported in libgcc and libstdc++. The following patch adds similar support for AArch64. Unlike the x86 changes, this one keeps the old __bf16 mangling of u6__bf16 rather than DF16b (so an exception from Itanium ABI), but otherwise __bf16 and decltype (0.0bf16) are the same type and both in C++ act as extended floating-point type. 2023-03-13 Jakub Jelinek <jakub@redhat.com> gcc/ * config/aarch64/aarch64.h (aarch64_bf16_type_node): Remove. (aarch64_bf16_ptr_type_node): Adjust comment. * config/aarch64/aarch64.cc (aarch64_gimplify_va_arg_expr): Use bfloat16_type_node rather than aarch64_bf16_type_node. (aarch64_libgcc_floating_mode_supported_p, aarch64_scalar_mode_supported_p): Also support BFmode. (aarch64_invalid_conversion, aarch64_invalid_unary_op): Remove. (aarch64_invalid_binary_op): Remove BFmode related rejections. (TARGET_INVALID_CONVERSION, TARGET_INVALID_UNARY_OP): Don't redefine. * config/aarch64/aarch64-builtins.cc (aarch64_bf16_type_node): Remove. (aarch64_int_or_fp_type): Use bfloat16_type_node rather than aarch64_bf16_type_node. (aarch64_init_simd_builtin_types): Likewise. (aarch64_init_bf16_types): Likewise. Don't create bfloat16_type_node, which is created in tree.cc already. * config/aarch64/aarch64-sve-builtins.def (svbfloat16_t): Likewise. gcc/testsuite/ * gcc.target/aarch64/sve/acle/general-c/ternary_bfloat16_opt_n_1.c: Don't expect one __bf16 related error. * gcc.target/aarch64/bfloat16_vector_typecheck_1.c: Adjust or remove dg-error directives for __bf16 being an extended arithmetic type. * gcc.target/aarch64/bfloat16_vector_typecheck_2.c: Likewise. * gcc.target/aarch64/bfloat16_scalar_typecheck.c: Likewise. * g++.target/aarch64/bfloat_cpp_typecheck.C: Don't expect two __bf16 related errors. libgcc/ * config/aarch64/t-softfp (softfp_extensions): Add bfsf. (softfp_truncations): Add tfbf dfbf sfbf hfbf. (softfp_extras): Add floatdibf floatundibf floattibf floatuntibf. * config/aarch64/libgcc-softfp.ver (GCC_13.0.0): Export __extendbfsf2 and __trunc{s,d,t,h}fbf2. * config/aarch64/sfp-machine.h (_FP_NANFRAC_B, _FP_NANSIGN_B): Define. * soft-fp/floatundibf.c: New file. * soft-fp/floatdibf.c: New file. libstdc++-v3/ * config/abi/pre/gnu.ver (CXXABI_1.3.14): Also export __bf16 tinfos if it isn't mangled as DF16b but u6__bf16.
2023-03-10libgcc, i386: Add __fix{,uns}bfti and __float{,un}tibf [PR107703]Jakub Jelinek2-1/+6
While DI <-> BF conversions can be handled (and are) through DI <-> XF <-> BF and for narrower integral modes even sometimes through DF or SF, because XFmode has 64-bit mantissa and so all the DImode values are exactly representable in XFmode. That is not the case for TImode, and while e.g. the HF -> TI conversions are IMHO useless in libgcc, because HFmode has -65504.0f16, 65504.0f16 range, all the integers will be already representable in SImode (or even HImode for unsigned) and so I think HF -> DI -> TI conversions are faster and valid, BFmode has roughly the same range as SFmode and so we absolutely need the TI -> BF conversions to avoid double rounding. As for BF -> TI conversions, they can be either also implemented in libgcc, or they can be implemented (as done in this commit) as BF -> SF -> TI conversions with the same code generation used elsewhere, just doing the 16-bit left shift of the bits - I think we don't need to handle sNaNs during the BF -> SF part because SF -> TI (which is already a libcall too) will handle that too. The BF -> SF -> TI path avoids wasting 32: 0000000000015e10 321 FUNC GLOBAL DEFAULT 13 __fixbfti@@GCC_13.0.0 89: 0000000000015f60 299 FUNC GLOBAL DEFAULT 13 __fixunsbfti@@GCC_13.0.0 2023-03-10 Jakub Jelinek <jakub@redhat.com> PR target/107703 * optabs.cc (expand_fix): For conversions from BFmode to integral, use shifts to convert it to SFmode first and then convert SFmode to integral. * soft-fp/floattibf.c: New file. * soft-fp/floatuntibf.c: New file. * config/i386/libgcc-glibc.ver: Export __float{,un}tibf @ GCC_13.0.0. * config/i386/64/t-softfp (softfp_extras): Add floattibf and floatuntibf. (CFLAGS-floattibf.c, CFLAGS-floatunstibf.c): Add -msse2.
2023-03-08libgcc, rs6000: Fix bump size for powerpc64 elfv1 ABI [PR108727]Kewen Lin1-2/+2
As PR108727 shows, when cleanup code called by the stack unwinder calls function _Unwind_Resume, it goes via plt stub like: function 00000000.plt_call._Unwind_Resume: => 0x0000000010003580 <+0>: std r2,40(r1) 0x0000000010003584 <+4>: ld r12,-31760(r2) 0x0000000010003588 <+8>: mtctr r12 0x000000001000358c <+12>: ld r2,-31752(r2) 0x0000000010003590 <+16>: cmpldi r2,0 0x0000000010003594 <+20>: bnectr+ 0x0000000010003598 <+24>: b 0x100031a4 <_Unwind_Resume@plt> It wants to save TOC base (r2) to r1 + 40, but we only bump the stack segment by 32 bytes as follows: stdu %r29,-32(%r3) It means the access is out of the stack segment allocated by __generic_morestack, once the touch area isn't writable like this failure shows, it would cause segment fault. So fix the bump size with one reasonable value PARAMS. PR libgcc/108727 libgcc/ChangeLog: * config/rs6000/morestack.S (__morestack): Use PARAMS for new stack bump size.
2023-03-06PR target/107299: Fix build issue when long double is IEEE 128-bitMichael Meissner3-11/+46
This patch updates the IEEE 128-bit types used in libgcc. At the moment, we cannot build GCC when the target uses IEEE 128-bit long doubles, such as building the compiler for a native Fedora 36 system. The build dies when it is trying to build the _mulkc3.c and _divkc3 modules. This patch changes libgcc to use long double for the IEEE 128-bit base type if long double is IEEE 128-bit, and it uses _Float128 otherwise. The built-in functions are adjusted to be the correct version based on the IEEE 128-bit base type used. While it is desirable to ultimately have __float128 and _Float128 use the same internal type and mode within GCC, at present if you use the option -mabi=ieeelongdouble, the __float128 type will use the long double type and not the _Float128 type. We get an internal compiler error if we combine the signbitf128 built-in with a long double type. I've gone through several iterations of trying to fix this within GCC, and there are various problems that have come up. I developed this alternative patch that changes libgcc so that it does not tickle the issue. I hope we can fix the compiler at some point, but right now, this is preventing people on Fedora 36 systems from building compilers where the default long double is IEEE 128-bit. 2023-03-06 Michael Meissner <meissner@linux.ibm.com> libgcc/ PR target/107299 * config/rs6000/_divkc3.c (COPYSIGN): Use the correct built-in based on whether long double is IBM or IEEE. (INFINITY): Likewise. (FABS): Likewise. * config/rs6000/_mulkc3.c (COPYSIGN): Likewise. (INFINITY): Likewise. * config/rs6000/quad-float128.h (TF): Remove definition. (TFtype): Define to be long double or _Float128. (TCtype): Define to be _Complex long double or _Complex _Float128. * libgcc2.h (TFtype): Allow machine config files to override this. (TCtype): Likewise. * soft-fp/quad.h (TFtype): Likewise.
2023-02-13RISC-V: Handle vlenb correctly in unwindingKito Cheng1-0/+39
gcc/ChangeLog: * config/riscv/riscv.h (RISCV_DWARF_VLENB): New. (DWARF_FRAME_REGISTERS): New. (DWARF_REG_TO_UNWIND_COLUMN): New. libgcc/ChangeLog: * config.host (riscv*-*-*): Add config/riscv/value-unwind.h. * config/riscv/value-unwind.h: New.
2023-02-03arm: Fix warning in libgcc/config/arm/pr-support.cChristophe Lyon1-0/+6
I have noticed some warnings when building GCC for arm-eabi: pr-support.c:110:7: warning: variable ‘set_pac_sp’ set but not used [-Wunused-but-set-variable] pr-support.c:109:7: warning: variable ‘set_pac’ set but not used [-Wunused-but-set-variable] This small patch avoids them by defining these two variables undef TARGET_HAVE_PACBTI, like the code which actually uses them. libgcc/ * config/arm/pr-support.c (__gnu_unwind_execute): Use TARGET_HAVE_PACBTI to define set_pac and set_pac_sp.
2023-01-30Add support for x86_64-*-gnu-* targets to build x86_64 gnumach/hurdFlavio Cruz1-0/+10
Tested by building a toolchain and compiling gnumach for x86_64 [1]. This is the basic version without unwind support which I think is only required to implement exceptions. [1] https://github.com/flavioc/cross-hurd/blob/master/bootstrap-kernel.sh. gcc/ChangeLog: * config.gcc: Recognize x86_64-*-gnu* targets and include i386/gnu64.h. * config/i386/gnu64.h: Define configuration for new target including ld.so location. libgcc/ChangeLog: * config.host: Recognize x86_64-*-gnu* targets. * config/i386/gnu-unwind.h: Update to handle __x86_64__ with a TODO for now. Signed-off-by: Flavio Cruz <flaviocruz@gmail.com>
2023-01-23arm: Add support for new frame unwinding instruction "0xb5".Srinath Parvathaneni1-2/+13
This patch adds support for Arm frame unwinding instruction "0xb5" [1]. When an exception is taken and "0xb5" instruction is encounter during runtime stack-unwinding, we use effective vsp as modifier in pointer authentication. On completion of stack unwinding if "0xb5" instruction is not encountered then CFA will be used as modifier in pointer authentication. [1] https://github.com/ARM-software/abi-aa/releases/download/2022Q3/ehabi32.pdf libgcc/ChangeLog: 2022-11-09 Srinath Parvathaneni <srinath.parvathaneni@arm.com> * config/arm/pr-support.c (__gnu_unwind_execute): Decode opcode "0xb5".
2023-01-23[PATCH 6/15] arm: Add pointer authentication for stack-unwinding runtimeAndrea Corallo2-0/+60
This patch adds authentication for when the stack is unwound when an exception is taken. All the changes here are done to the runtime code in libgcc's unwinder code for Arm target. All the changes are guarded under defined (__ARM_FEATURE_PAC_DEFAULT) and activated only if the +pacbti feature is switched on for the architecture. This means that switching on the target feature via -march or -mcpu is sufficient and -mbranch-protection need not be enabled. This ensures that the unwinder is authenticated only if the PACBTI instructions are available in the non-NOP space as it uses AUTG. Just generating PAC/AUT instructions using -mbranch-protection will not enable authentication on the unwinder. Pre-approved with the requested changes here <https://gcc.gnu.org/pipermail/gcc-patches/2021-December/586555.html>. gcc/ChangeLog: * ginclude/unwind-arm-common.h (_Unwind_VRS_RegClass): Introduce new pseudo register class _UVRSC_PAC. libgcc/ChangeLog: * config/arm/pr-support.c (__gnu_unwind_execute): Decode exception opcode (0xb4) for saving RA_AUTH_CODE and authenticate with AUTG if found. * config/arm/unwind-arm.c (struct pseudo_regs): New. (phase1_vrs): Introduce new field to store pseudo-reg state. (phase2_vrs): Likewise. (_Unwind_VRS_Get): Load pseudo register state from virtual reg set. (_Unwind_VRS_Set): Store pseudo register state to virtual reg set. (_Unwind_VRS_Pop): Load pseudo register value from stack into VRS. Co-Authored-By: Tejas Belagod <tbelagod@arm.com> Co-Authored-By: Srinath Parvathaneni <srinath.parvathaneni@arm.com>
2023-01-18libgcc: Fix uninitialized RA signing on AArch64 [PR107678]Wilco Dijkstra1-28/+12
A recent change only initializes the regs.how[] during Dwarf unwinding which resulted in an uninitialized offset used in return address signing and random failures during unwinding. The fix is to encode the return address signing state in REG_UNSAVED and a new state REG_UNSAVED_ARCHEXT. libgcc/ PR target/107678 * unwind-dw2.h (REG_UNSAVED_ARCHEXT): Add new enum. * unwind-dw2.c (uw_update_context_1): Add REG_UNSAVED_ARCHEXT case. * unwind-dw2-execute_cfa.h: Use REG_UNSAVED_ARCHEXT/REG_UNSAVED to encode the return address signing state. * config/aarch64/aarch64-unwind.h (aarch64_demangle_return_addr) Check current return address signing state. (aarch64_frob_update_contex): Remove.
2023-01-16Update copyright years.Jakub Jelinek1005-1005/+1005
2023-01-13Fix support for atomic loads and stores on hppa.John David Anglin6-17/+400
This change updates the atomic libcall support to fix the following issues: 1) A internal compiler error with -fno-sync-libcalls. 2) When sync libcalls are disabled, we don't generate libcalls for libatomic. 3) There is no sync libcall support for targets other than linux. As a result, non-atomic stores are silently emitted for types smaller or equal to the word size. There are now a few atomic libcalls in the libgcc code, so we need sync support on all targets. 2023-01-13 John David Anglin <danglin@gcc.gnu.org> gcc/ChangeLog: * config/pa/pa-linux.h (TARGET_SYNC_LIBCALL): Delete define. * config/pa/pa.cc (pa_init_libfuncs): Use MAX_SYNC_LIBFUNC_SIZE define. * config/pa/pa.h (TARGET_SYNC_LIBCALLS): Use flag_sync_libcalls. (MAX_SYNC_LIBFUNC_SIZE): Define. (TARGET_CPU_CPP_BUILTINS): Define __SOFTFP__ when soft float is enabled. * config/pa/pa.md (atomic_storeqi): Emit __atomic_exchange_1 libcall when sync libcalls are disabled. (atomic_storehi, atomic_storesi, atomic_storedi): Likewise. (atomic_loaddi): Emit __atomic_load_8 libcall when sync libcalls are disabled on 32-bit target. * config/pa/pa.opt (matomic-libcalls): New option. * doc/invoke.texi (HPPA Options): Update. libgcc/ChangeLog: * config.host (hppa*64*-*-linux*): Adjust tmake_file to use pa/t-pa64-linux. (hppa*64*-*-hpux11*): Adjust tmake_file to use pa/t-pa64-hpux instead of pa/t-hpux and pa/t-pa64. * config/pa/linux-atomic.c: Define u32 type. (ATOMIC_LOAD): Define new macro to implement atomic_load_1, atomic_load_2, atomic_load_4 and atomic_load_8. Update sync defines to use atomic_load calls for type. (SYNC_LOCK_LOAD_2): New macro to implement __sync_lock_load_8. * config/pa/sync-libfuncs.c: New file. * config/pa/t-netbsd (LIB2ADD_ST): Define. * config/pa/t-openbsd (LIB2ADD_ST): Define. * config/pa/t-pa64-hpux: New file. * config/pa/t-pa64-linux: New file.
2023-01-13libstdc++: Fix unintended layout change to std::basic_filebuf [PR108331]Jonathan Wakely1-0/+8
GCC 13 has a new implementation of gthr-win32.h which supports C++11 mutexes, threads etc. but this causes an unintended ABI break. The __gthread_mutex_t type is always used in std::basic_filebuf even in C++98, so independent of whether C++11 sync primitives work or not. Because that type changed for the win32 thread model, we have a layout change in std::basic_filebuf. The member is completely unused, it just gets passed to the std::__basic_file constructor and ignored. So we don't need that mutex to actually work, we just need its layout to not change. Introduce a new __gthr_win32_legacy_mutex_t struct in gthr-win32.h with the old layout, and conditionally use that in std::basic_filebuf. PR libstdc++/108331 libgcc/ChangeLog: * config/i386/gthr-win32.h (__gthr_win32_legacy_mutex_t): New struct matching the previous __gthread_mutex_t struct. (__GTHREAD_LEGACY_MUTEX_T): Define. libstdc++-v3/ChangeLog: * config/io/c_io_stdio.h (__c_lock): Define as a typedef for __GTHREAD_LEGACY_MUTEX_T if defined.
2023-01-13arm: unified syntax for libgcc clear_cacheSeija Kijin1-1/+1
The patch to convert all thumb1 code in libgcc to unified syntax omitted changing all swi instructions to the current name: svc. libgcc/ChangeLog: * config/arm/lib1funcs.S (clear_cache): Use SVC to conform to unified syntax.
2023-01-07Always define `WIN32_LEAN_AND_MEAN` before <windows.h>LIU Hao1-0/+1
Recently, mingw-w64 has got updated <msxml.h> from Wine which is included indirectly by <windows.h> if `WIN32_LEAN_AND_MEAN` is not defined. The `IXMLDOMDocument` class has a member function named `abort()`, which gets affected by our `abort()` macro in "system.h". `WIN32_LEAN_AND_MEAN` should, nevertheless, always be defined. This can exclude 'APIs such as Cryptography, DDE, RPC, Shell, and Windows Sockets' [1], and speed up compilation of these files a bit. [1] https://learn.microsoft.com/en-us/windows/win32/winprog/using-the-windows-headers gcc/ PR middle-end/108300 * config/xtensa/xtensa-dynconfig.c: Define `WIN32_LEAN_AND_MEAN` before <windows.h>. * diagnostic-color.cc: Likewise. * plugin.cc: Likewise. * prefix.cc: Likewise. gcc/ada/ PR middle-end/108300 * adaint.c: Define `WIN32_LEAN_AND_MEAN` before `#include <windows.h>`. * cio.c: Likewise. * ctrl_c.c: Likewise. * expect.c: Likewise. * gsocket.h: Likewise. * mingw32.h: Likewise. * mkdir.c: Likewise. * rtfinal.c: Likewise. * rtinit.c: Likewise. * seh_init.c: Likewise. * sysdep.c: Likewise. * terminals.c: Likewise. * tracebak.c: Likewise. gcc/jit/ PR middle-end/108300 * jit-w32.h: Define `WIN32_LEAN_AND_MEAN` before <windows.h>. libatomic/ PR middle-end/108300 * config/mingw/lock.c: Define `WIN32_LEAN_AND_MEAN` before <windows.h>. libffi/ PR middle-end/108300 * src/aarch64/ffi.c: Define `WIN32_LEAN_AND_MEAN` before <windows.h>. libgcc/ PR middle-end/108300 * config/i386/enable-execute-stack-mingw32.c: Define `WIN32_LEAN_AND_MEAN` before <windows.h>. * libgcc2.c: Likewise. * unwind-generic.h: Likewise. libgfortran/ PR middle-end/108300 * intrinsics/sleep.c: Define `WIN32_LEAN_AND_MEAN` before <windows.h>. libgomp/ PR middle-end/108300 * config/mingw32/proc.c: Define `WIN32_LEAN_AND_MEAN` before <windows.h>. libiberty/ PR middle-end/108300 * make-temp-file.c: Define `WIN32_LEAN_AND_MEAN` before <windows.h>. * pex-win32.c: Likewise. libssp/ PR middle-end/108300 * ssp.c: Define `WIN32_LEAN_AND_MEAN` before <windows.h>. libstdc++-v3/ PR middle-end/108300 * src/c++11/system_error.cc: Define `WIN32_LEAN_AND_MEAN` before <windows.h>. * src/c++11/thread.cc: Likewise. * src/c++17/fs_ops.cc: Likewise. * src/filesystem/ops.cc: Likewise. libvtv/ PR middle-end/108300 * vtv_malloc.cc: Define `WIN32_LEAN_AND_MEAN` before <windows.h>. * vtv_rts.cc: Likewise. * vtv_utils.cc: Likewise.
2023-01-02Update Copyright year in ChangeLog filesJakub Jelinek1-1/+1
2022 -> 2023
2022-12-25libgcc: fix gfortran build on WindowsJonathan Yong1-1/+3
Broken by 9149a5b7e0a66b7b94d5b7db3194a975d18dea2f. CC_NONE is defined by wingdi.h and conflicting with gcc. Committed as obvious. libgcc/: * config/i386/gthr-win32.h: undef CC_NONE Signed-off-by: Jonathan Yong <10walls@gmail.com>
2022-12-24libgcc, Darwin: No early install for the compatibility libgcc_s.1.dylib.Iain Sandoe1-7/+14
On Darwin, GCC now uses a libgcc_s.1.1 for builtins and forwards the system unwinder. We do, however, build a backwards compatibility libgcc_s.1.dylib. However, this is not needed by GCC and can cause incorrect operation when DYLD_LIBRARY_PATH is in use. Since we do not need or use it during the build, the solution is to skip the installation into the $build/gcc directory. Signed-off-by: Iain Sandoe <iain@sandoe.co.uk> libgcc/ChangeLog: * config/t-slibgcc-darwin (install-darwin-libgcc-stubs): Skip the install of libgcc_s.1.dylib when the installation is into the build gcc directory.
2022-12-23Reimplement GNU threads library on native WindowsEric Botcazou7-457/+626
This reimplements the GNU threads library on native Windows (except for the Objective-C specific subset) using direct Win32 API calls, in lieu of the implementation based on semaphores. This base implementations requires Windows XP/Server 2003, which was the default minimal setting of MinGW-W64 until end of 2020. This also adds the support required for the C++11 threads, using again direct Win32 API calls; this additional layer requires Windows Vista/Server 2008 and is enabled only if _WIN32_WINNT >= 0x0600. This also changes libstdc++ to pass -D_WIN32_WINNT=0x0600 but only when the switch --enable-libstdcxx-threads is passed, which means that C++11 threads are still disabled by default *unless* MinGW-W64 itself is configured for Windows Vista/Server 2008 or later by default (this has been the case in the development version since end of 2020, for earlier versions you can configure it --with-default-win32-winnt=0x0600 to get the same effect). I only manually tested it on i686-w64-mingw32 and x86_64-w64-mingw32 but AdaCore has used it in their C/C++/Ada compilers for 3 years now and the 30_threads chapter of the libstdc++ testsuite was clean at the time. 2022-10-31 Eric Botcazou <ebotcazou@adacore.com> libgcc/ * config.host (i[34567]86-*-mingw*): Add thread fragment after EH one as well as new i386/t-slibgcc-mingw fragment. (x86_64-*-mingw*): Likewise. * config/i386/gthr-win32.h: If _WIN32_WINNT is at least 0x0600, define both __GTHREAD_HAS_COND and __GTHREADS_CXX0X to 1. Error out if _GTHREAD_USE_MUTEX_TIMEDLOCK is 1. Include stdlib.h instead of errno.h and do not include _mingw.h. (CONST_CAST2): Add specific definition for C++. (ATTRIBUTE_UNUSED): New macro. (__UNUSED_PARAM): Delete. Define WIN32_LEAN_AND_MEAN before including windows.h. (__gthread_objc_data_tls): Use TLS_OUT_OF_INDEXES instead of (DWORD)-1. (__gthread_objc_init_thread_system): Likewise. (__gthread_objc_thread_get_data): Minor tweak. (__gthread_objc_condition_allocate): Use ATTRIBUTE_UNUSED. (__gthread_objc_condition_deallocate): Likewise. (__gthread_objc_condition_wait): Likewise. (__gthread_objc_condition_broadcast): Likewise. (__gthread_objc_condition_signal): Likewise. Include sys/time.h. (__gthr_win32_DWORD): New typedef. (__gthr_win32_HANDLE): Likewise. (__gthr_win32_CRITICAL_SECTION): Likewise. (__gthr_win32_CONDITION_VARIABLE): Likewise. (__gthread_t): Adjust. (__gthread_key_t): Likewise. (__gthread_mutex_t): Likewise. (__gthread_recursive_mutex_t): Likewise. (__gthread_cond_t): New typedef. (__gthread_time_t): Likewise. (__GTHREAD_MUTEX_INIT_DEFAULT): Delete. (__GTHREAD_RECURSIVE_MUTEX_INIT_DEFAULT): Likewise. (__GTHREAD_COND_INIT_FUNCTION): Define. (__GTHREAD_TIME_INIT): Likewise. (__gthr_i486_lock_cmp_xchg): Delete. (__gthr_win32_create): Declare. (__gthr_win32_join): Likewise. (__gthr_win32_self): Likewise. (__gthr_win32_detach): Likewise. (__gthr_win32_equal): Likewise. (__gthr_win32_yield): Likewise. (__gthr_win32_mutex_destroy): Likewise. (__gthr_win32_cond_init_function): Likewise if __GTHREADS_HAS_COND is 1. (__gthr_win32_cond_broadcast): Likewise. (__gthr_win32_cond_signal): Likewise. (__gthr_win32_cond_wait): Likewise. (__gthr_win32_cond_timedwait): Likewise. (__gthr_win32_recursive_mutex_init_function): Delete. (__gthr_win32_recursive_mutex_lock): Likewise. (__gthr_win32_recursive_mutex_unlock): Likewise. (__gthr_win32_recursive_mutex_destroy): Likewise. (__gthread_create): New inline function. (__gthread_join): Likewise. (__gthread_self): Likewise. (__gthread_detach): Likewise. (__gthread_equal): Likewise. (__gthread_yield): Likewise. (__gthread_cond_init_function): Likewise if __GTHREADS_HAS_COND is 1. (__gthread_cond_broadcast): Likewise. (__gthread_cond_signal): Likewise. (__gthread_cond_wait): Likewise. (__gthread_cond_timedwait): Likewise. (__GTHREAD_WIN32_INLINE): New macro. (__GTHREAD_WIN32_COND_INLINE): Likewise. (__GTHREAD_WIN32_ACTIVE_P): Likewise. Define WIN32_LEAN_AND_MEAN before including windows.h. (__gthread_once): Minor tweaks. (__gthread_key_create): Use ATTRIBUTE_UNUSED and TLS_OUT_OF_INDEXES. (__gthread_key_delete): Minor tweak. (__gthread_getspecific): Likewise. (__gthread_setspecific): Likewise. (__gthread_mutex_init_function): Reimplement. (__gthread_mutex_destroy): Likewise. (__gthread_mutex_lock): Likewise. (__gthread_mutex_trylock): Likewise. (__gthread_mutex_unlock): Likewise. (__gthr_win32_abs_to_rel_time): Declare. (__gthread_recursive_mutex_init_function): Reimplement. (__gthread_recursive_mutex_destroy): Likewise. (__gthread_recursive_mutex_lock): Likewise. (__gthread_recursive_mutex_trylock): Likewise. (__gthread_recursive_mutex_unlock): Likewise. (__gthread_cond_destroy): New inline function. (__gthread_cond_wait_recursive): Likewise. * config/i386/gthr-win32.c: Delete everything. Include gthr-win32.h to get the out-of-line version of inline routines. Add compile-time checks for the local version of the Win32 types. * config/i386/gthr-win32-cond.c: New file. * config/i386/gthr-win32-thread.c: Likewise. * config/i386/t-gthr-win32: Add config/i386/gthr-win32-thread.c to the EH part, config/i386/gthr-win32-cond.c and config/i386/gthr-win32.c to the static version of libgcc. * config/i386/t-slibgcc-mingw: New file. * config/i386/libgcc-mingw.ver: Likewise. libstdc++-v3/ * acinclude.m4 (GLIBCXX_EXPORT_FLAGS): Substitute CPPFLAGS. (GLIBCXX_ENABLE_LIBSTDCXX_TIME): Set ac_has_sched_yield and ac_has_win32_sleep to yes for MinGW. Change HAVE_WIN32_SLEEP into _GLIBCXX_USE_WIN32_SLEEP. (GLIBCXX_CHECK_GTHREADS): Add _WIN32_THREADS to compilation flags for Win32 threads and force _GTHREAD_USE_MUTEX_TIMEDLOCK to 0 for them. Add -D_WIN32_WINNT=0x0600 to compilation flags if yes was configured and add it to CPPFLAGS on success. * config.h.in: Regenerate. * configure: Likewise. * config/os/mingw32-w64/os_defines.h (_GLIBCXX_USE_GET_NPROCS_WIN32): Define to 1. * config/os/mingw32/os_defines.h (_GLIBCXX_USE_GET_NPROCS_WIN32): Ditto * src/c++11/thread.cc (get_nprocs): Provide Win32 implementation if _GLIBCXX_USE_GET_NPROCS_WIN32 is defined. Replace HAVE_WIN32_SLEEP with USE_WIN32_SLEEP. * testsuite/19_diagnostics/headers/system_error/errc_std_c++0x.cc: Add missing conditional compilation. * testsuite/lib/libstdc++.exp (check_v3_target_sleep): Add support for _GLIBCXX_USE_WIN32_SLEEP. (check_v3_target_nprocs): Likewise for _GLIBCXX_USE_GET_NPROCS_WIN32. Signed-off-by: Eric Botcazou <ebotcazou@adacore.com> Signed-off-by: Jonathan Yong <10walls@gmail.com>
2022-12-08libgcc: xtensa: remove stray symbols from X*HAL macro definitionsMax Filippov1-7/+7
libgcc/ * config/xtensa/xtensa-config-builtin.h (XCHAL_NUM_AREGS) (XCHAL_ICACHE_SIZE, XCHAL_DCACHE_SIZE, XCHAL_ICACHE_LINESIZE) (XCHAL_DCACHE_LINESIZE, XCHAL_MMU_MIN_PTE_PAGE_SIZE) (XSHAL_ABI): Remove stray symbols from macro definitions.
2022-12-07libgcc: xtensa: use built-in configurationMax Filippov5-4/+202
Now that gcc provides __XCHAL_* definitions use them instead of XCHAL_* definitions from the include/xtensa-config.h. That makes libgcc dynamically configurable for the target xtensa core. libgcc/ * config/xtensa/crti.S (xtensa-config.h): Replace #inlcude with xtensa-config-builtin.h. * config/xtensa/crtn.S: Likewise. * config/xtensa/lib1funcs.S: Likewise. * config/xtensa/lib2funcs.S: Likewise. * config/xtensa/xtensa-config-builtin.h: New File.
2022-10-23libgcc: Update 'gthr-mcf.h' to include a dedicated header for libobjcLIU Hao1-0/+35
'libobjc/thr.c' includes 'gthr.h'. While all the other gthread headers have `#ifdef _LIBOBJC` checks, and provide a different set of inline functions, I think having one header provide two completely unrelated set of APIs is unsatisfactory, complicates maintenance, and hinders further development. This commit references a new header for libobjc, and adds a copyright notice, as in other headers. libgcc/ChangeLog: * config/i386/gthr-mcf.h: Include 'gthr_libobjc.h' when building libobjc, instead of 'gthr.h'
2022-10-19gcc: Add 'mcf' thread model support from mcfgthreadLIU Hao3-1/+7
This patch adds the new thread model `mcf`, which implements mutexes and condition variables with the mcfgthread library. Source code for mcfgthread is available at <https://github.com/lhmouse/mcfgthread>. config/ChangeLog: * gthr.m4 (GCC_AC_THREAD_HEADER): Add new case for `mcf` thread model gcc/ChangeLog: * config/i386/mingw-mcfgthread.h: New file * config/i386/mingw32.h: Add builtin macro and default libraries for mcfgthread when thread model is `mcf` * config.gcc: Include 'i386/mingw-mcfgthread.h' when thread model is `mcf` * configure.ac: Recognize `mcf` as a valid thread model * config.in: Regenerate * configure: Regenerate libatomic/ChangeLog: * configure.tgt: Add new case for `mcf` thread model libgcc/ChangeLog: * config.host: Add new cases for `mcf` thread model * config/i386/gthr-mcf.h: New file * config/i386/t-mingw-mcfgthread: New file * config/i386/t-slibgcc-cygming: Add mcfgthread for libgcc DLL * configure: Regenerate libstdc++-v3/ChangeLog: * libsupc++/atexit_thread.cc (__cxa_thread_atexit): Use implementation from mcfgthread if available * libsupc++/guard.cc (__cxa_guard_acquire, __cxa_guard_release, __cxa_guard_abort): Use implementations from mcfgthread if available * configure: Regenerate
2022-10-17x86: Check corrupted return address when unwinding stackH.J. Lu1-4/+47
If shadow stack is enabled, when unwinding stack, we count how many stack frames we pop to reach the landing pad and adjust shadow stack by the same amount. When counting the stack frame, we compare the return address on normal stack against the return address on shadow stack. If they don't match, return _URC_FATAL_PHASE2_ERROR for the corrupted return address on normal stack. Don't check the return address for 1. Non-catchable exception where exception_class == 0. Process will be terminated. 2. Zero return address which marks the outermost stack frame. 3. Signal stack frame since kernel puts a restore token on shadow stack. * unwind-generic.h (_Unwind_Frames_Increment): Add the EXC argument. * unwind.inc (_Unwind_RaiseException_Phase2): Pass EXC to _Unwind_Frames_Increment. (_Unwind_ForcedUnwind_Phase2): Likewise. * config/i386/shadow-stack-unwind.h (_Unwind_Frames_Increment): Take the EXC argument. Return _URC_FATAL_PHASE2_ERROR if the return address on normal stack doesn't match the return address on shadow stack.
2022-10-14middle-end, c++, i386, libgcc: std::bfloat16_t and __bf16 arithmetic supportJakub Jelinek5-2/+22
Here is a complete patch to add std::bfloat16_t support on x86 (AArch64 and ARM left for later). Almost no BFmode optabs are added by the patch, so for binops/unops it extends to SFmode first and then truncates back to BFmode. For {HF,SF,DF,XF,TF}mode -> BFmode conversions libgcc has implementations of all those conversions so that we avoid double rounding, for BFmode -> {DF,XF,TF}mode conversions to avoid growing libgcc too much it emits BFmode -> SFmode conversion first and then converts to the even wider mode, neither step should be imprecise. For BFmode -> HFmode, it first emits a precise BFmode -> SFmode conversion and then SFmode -> HFmode, because neither format is subset or superset of the other, while SFmode is superset of both. expr.cc then contains a -ffast-math optimization of the BF -> SF and SF -> BF conversions if we don't optimize for space (and for the latter if -frounding-math isn't enabled either). For x86, perhaps truncsfbf2 optab could be defined for TARGET_AVX512BF16 but IMNSHO should FAIL if !flag_finite_math || flag_rounding_math || !flag_unsafe_math_optimizations, because I think the insn doesn't raise on sNaNs, hardcodes round to nearest and flushes denormals to zero. By default (unless x86 -fexcess-precision=16) we use float excess precision for BFmode, so truncate only on explicit casts and assignments. The patch introduces a single __bf16 builtin - __builtin_nansf16b, because (__bf16) __builtin_nansf ("") will drop the sNaN into qNaN, and uses f16b suffix instead of bf16 because there would be ambiguity on log vs. logb - __builtin_logbf16 could be either log with bf16 suffix or logb with f16 suffix. In other cases libstdc++ should mostly use __builtin_*f for std::bfloat16_t overloads (we have a problem with std::nextafter though but that one we have also for std::float16_t). 2022-10-14 Jakub Jelinek <jakub@redhat.com> gcc/ * tree-core.h (enum tree_index): Add TI_BFLOAT16_TYPE. * tree.h (bfloat16_type_node): Define. * tree.cc (excess_precision_type): Promote bfloat16_type_mode like float16_type_mode. (build_common_tree_nodes): Initialize bfloat16_type_node if BFmode is supported. * expmed.h (maybe_expand_shift): Declare. * expmed.cc (maybe_expand_shift): No longer static. * expr.cc (convert_mode_scalar): Don't ICE on BF -> HF or HF -> BF conversions. If there is no optab, handle BF -> {DF,XF,TF,HF} conversions as separate BF -> SF -> {DF,XF,TF,HF} conversions, add -ffast-math generic implementation for BF -> SF and SF -> BF conversions. * builtin-types.def (BT_BFLOAT16, BT_FN_BFLOAT16_CONST_STRING): New. * builtins.def (BUILT_IN_NANSF16B): New builtin. * fold-const-call.cc (fold_const_call): Handle CFN_BUILT_IN_NANSF16B. * config/i386/i386.cc (classify_argument): Handle E_BCmode. (ix86_libgcc_floating_mode_supported_p): Also return true for BFmode for -msse2. (ix86_mangle_type): Mangle BFmode as DF16b. (ix86_invalid_conversion, ix86_invalid_unary_op, ix86_invalid_binary_op): Remove. (TARGET_INVALID_CONVERSION, TARGET_INVALID_UNARY_OP, TARGET_INVALID_BINARY_OP): Don't redefine. * config/i386/i386-builtins.cc (ix86_bf16_type_node): Remove. (ix86_register_bf16_builtin_type): Use bfloat16_type_node rather than ix86_bf16_type_node, only create it if still NULL. * config/i386/i386-builtin-types.def (BFLOAT16): Likewise. * config/i386/i386.md (cbranchbf4, cstorebf4): New expanders. gcc/c-family/ * c-cppbuiltin.cc (c_cpp_builtins): If bfloat16_type_node, predefine __BFLT16_*__ macros and for C++23 also __STDCPP_BFLOAT16_T__. Predefine bfloat16_type_node related macros for -fbuilding-libgcc. * c-lex.cc (interpret_float): Handle CPP_N_BFLOAT16. gcc/c/ * c-typeck.cc (convert_arguments): Don't promote __bf16 to double. gcc/cp/ * cp-tree.h (extended_float_type_p): Return true for bfloat16_type_node. * typeck.cc (cp_compare_floating_point_conversion_ranks): Set extended{1,2} if mv{1,2} is bfloat16_type_node. Adjust comment. gcc/testsuite/ * lib/target-supports.exp (check_effective_target_bfloat16, check_effective_target_bfloat16_runtime, add_options_for_bfloat16): New. * gcc.dg/torture/bfloat16-basic.c: New test. * gcc.dg/torture/bfloat16-builtin.c: New test. * gcc.dg/torture/bfloat16-builtin-issignaling-1.c: New test. * gcc.dg/torture/bfloat16-complex.c: New test. * gcc.dg/torture/builtin-issignaling-1.c: Allow to be includable from bfloat16-builtin-issignaling-1.c. * gcc.dg/torture/floatn-basic.h: Allow to be includable from bfloat16-basic.c. * gcc.target/i386/vect-bfloat16-typecheck_2.c: Adjust expected diagnostics. * gcc.target/i386/sse2-bfloat16-scalar-typecheck.c: Likewise. * gcc.target/i386/vect-bfloat16-typecheck_1.c: Likewise. * g++.target/i386/bfloat_cpp_typecheck.C: Likewise. libcpp/ * include/cpplib.h (CPP_N_BFLOAT16): Define. * expr.cc (interpret_float_suffix): Handle bf16 and BF16 suffixes for C++. libgcc/ * config/i386/t-softfp (softfp_extensions): Add bfsf. (softfp_truncations): Add tfbf xfbf dfbf sfbf hfbf. (CFLAGS-extendbfsf2.c, CFLAGS-truncsfbf2.c, CFLAGS-truncdfbf2.c, CFLAGS-truncxfbf2.c, CFLAGS-trunctfbf2.c, CFLAGS-trunchfbf2.c): Add -msse2. * config/i386/libgcc-glibc.ver (GCC_13.0.0): Export __extendbfsf2 and __trunc{s,d,x,t,h}fbf2. * config/i386/sfp-machine.h (_FP_NANSIGN_B): Define. * config/i386/64/sfp-machine.h (_FP_NANFRAC_B): Define. * config/i386/32/sfp-machine.h (_FP_NANFRAC_B): Define. * soft-fp/brain.h: New file. * soft-fp/truncsfbf2.c: New file. * soft-fp/truncdfbf2.c: New file. * soft-fp/truncxfbf2.c: New file. * soft-fp/trunctfbf2.c: New file. * soft-fp/trunchfbf2.c: New file. * soft-fp/truncbfhf2.c: New file. * soft-fp/extendbfsf2.c: New file. libiberty/ * cp-demangle.h (D_BUILTIN_TYPE_COUNT): Increment. * cp-demangle.c (cplus_demangle_builtin_types): Add std::bfloat16_t entry. (cplus_demangle_type): Demangle DF16b. * testsuite/demangle-expected (_Z3xxxDF16b): New test.
2022-10-07libgcc, arc: Fix buildJakub Jelinek1-1/+1
Missed one spot in the r13-3108-g146e45914032 change (my sed script didn't expect nested []s). 2022-10-07 Jakub Jelinek <jakub@redhat.com> * config/arc/linux-unwind.h (arc_fallback_frame_state): Use fs->regs.how[X] instead of fs->regs.reg[X].how.
2022-10-06libgcc: Decrease size of _Unwind_FrameState and even more size of cleared ↵Jakub Jelinek33-264/+264
area in uw_frame_state_for The following patch implements something that has Florian found as low hanging fruit in our unwinder and has been discussed in the https://gcc.gnu.org/wiki/cauldron2022#cauldron2022talks.inprocess_unwinding_bof talk. _Unwind_FrameState type seems to be (unlike the pre-GCC 3 frame_state which has been part of ABI) private to unwind-dw2.c + unwind.inc it includes, it is always defined on the stack of some entrypoints, initialized by static uw_frame_state_for and the address of it is also passed to other static functions or the static inlines handling machine dependent unwinding, but it isn't fortunately passed to any callbacks or public functions, so I think we can safely change it any time we want. Florian mentioned that the structure is large even on x86_64, 384 bytes there, starts with 328 bytes long element with frame_state_reg_info type which then starts with an array with __LIBGCC_DWARF_FRAME_REGISTERS__ + 1 elements, each of them is 16 bytes long, on x86_64 __LIBGCC_DWARF_FRAME_REGISTERS__ is just 17 but even that is big, on say riscv __LIBGCC_DWARF_FRAME_REGISTERS__ is I think 128, on powerpc 111, on sh 153 etc. And, we memset to zero the whole fs variable with the _Unwind_FrameState type at the start of the unwinding. The reason why each element is 16 byte (on 64-bit arches) is that it contains some pointer or pointer sized integer and then an enum (with just 7 different enumerators) + padding. The following patch decreases it by moving the enum into a separate array and using just one byte for each register in that second array. We could compress it even more, say 4 bits per register, but I don't want to uglify the code for it too much and make the accesses slower. Furthermore, the clearing of the object can clear only thos how array and members after it, because REG_UNSAVED enumerator (0) doesn't actually need any pointer or pointer sized integer, it is just the other kinds that need to have there something. By doing this, on x86_64 the above numbers change to _Unwind_FrameState type being now 264 bytes long, frame_state_reg_info 208 bytes and we don't clear the first 144 bytes of the object, so the memset is 120 bytes, so ~ 31% of the old clearing size. On riscv 64-bit assuming it has same structure layout rules for the few types used there that would be ~ 2160 bytes of _Unwind_FrameState type before and ~ 1264 bytes after, with the memset previously ~ 2160 bytes and after ~ 232 bytes after. We've also talked about possibly adding a number of initially initialized regs and initializing the rest lazily, but at least for x86_64 with 18 elements in the array that doesn't seem to be worth it anymore, especially because return address column is 16 there and that is usually the first thing to be touched. It might theory help with lots of registers if they are usually untouched, but would uglify and complicate any stores to how by having to check there for the not initialized yet cases and lazy initialization, and similarly for all reads of how to do there if below last initialized one, use how, otherwise imply REG_UNSAVED. The disadvantage of the patch is that touching reg[x].loc and how[x] now means 2 cachelines rather than one as before, and I admit beyond bootstrap/regtest I haven't benchmarked it in any way. 2022-10-06 Jakub Jelinek <jakub@redhat.com> * unwind-dw2.h (REG_UNSAVED, REG_SAVED_OFFSET, REG_SAVED_REG, REG_SAVED_EXP, REG_SAVED_VAL_OFFSET, REG_SAVED_VAL_EXP, REG_UNDEFINED): New anonymous enum, moved from inside of struct frame_state_reg_info. (struct frame_state_reg_info): Remove reg[].how element and the anonymous enum there. Add how element. * unwind-dw2.c: Include stddef.h. (uw_frame_state_for): Don't clear first offsetof (_Unwind_FrameState, regs.how[0]) bytes of *fs. (execute_cfa_program, __frame_state_for, uw_update_context_1, uw_update_context): Use fs->regs.how[X] instead of fs->regs.reg[X].how or fs.regs.how[X] instead of fs.regs.reg[X].how. * config/sh/linux-unwind.h (sh_fallback_frame_state): Likewise. * config/bfin/linux-unwind.h (bfin_fallback_frame_state): Likewise. * config/pa/linux-unwind.h (pa32_fallback_frame_state): Likewise. * config/pa/hpux-unwind.h (UPDATE_FS_FOR_SAR, UPDATE_FS_FOR_GR, UPDATE_FS_FOR_FR, UPDATE_FS_FOR_PC, pa_fallback_frame_state): Likewise. * config/alpha/vms-unwind.h (alpha_vms_fallback_frame_state): Likewise. * config/alpha/linux-unwind.h (alpha_fallback_frame_state): Likewise. * config/arc/linux-unwind.h (arc_fallback_frame_state, arc_frob_update_context): Likewise. * config/riscv/linux-unwind.h (riscv_fallback_frame_state): Likewise. * config/nios2/linux-unwind.h (NIOS2_REG): Likewise. * config/nds32/linux-unwind.h (NDS32_PUT_FS_REG): Likewise. * config/s390/tpf-unwind.h (s390_fallback_frame_state): Likewise. * config/s390/linux-unwind.h (s390_fallback_frame_state): Likewise. * config/sparc/sol2-unwind.h (sparc64_frob_update_context, MD_FALLBACK_FRAME_STATE_FOR): Likewise. * config/sparc/linux-unwind.h (sparc64_fallback_frame_state, sparc64_frob_update_context, sparc_fallback_frame_state): Likewise. * config/i386/sol2-unwind.h (x86_64_fallback_frame_state, x86_fallback_frame_state): Likewise. * config/i386/w32-unwind.h (i386_w32_fallback_frame_state): Likewise. * config/i386/linux-unwind.h (x86_64_fallback_frame_state, x86_fallback_frame_state): Likewise. * config/i386/freebsd-unwind.h (x86_64_freebsd_fallback_frame_state): Likewise. * config/i386/dragonfly-unwind.h (x86_64_dragonfly_fallback_frame_state): Likewise. * config/i386/gnu-unwind.h (x86_gnu_fallback_frame_state): Likewise. * config/csky/linux-unwind.h (csky_fallback_frame_state): Likewise. * config/aarch64/linux-unwind.h (aarch64_fallback_frame_state): Likewise. * config/aarch64/freebsd-unwind.h (aarch64_freebsd_fallback_frame_state): Likewise. * config/aarch64/aarch64-unwind.h (aarch64_frob_update_context): Likewise. * config/or1k/linux-unwind.h (or1k_fallback_frame_state): Likewise. * config/mips/linux-unwind.h (mips_fallback_frame_state): Likewise. * config/loongarch/linux-unwind.h (loongarch_fallback_frame_state): Likewise. * config/m68k/linux-unwind.h (m68k_fallback_frame_state): Likewise. * config/xtensa/linux-unwind.h (xtensa_fallback_frame_state): Likewise. * config/rs6000/darwin-fallback.c (set_offset): Likewise. * config/rs6000/aix-unwind.h (MD_FROB_UPDATE_CONTEXT): Likewise. * config/rs6000/linux-unwind.h (ppc_fallback_frame_state): Likewise. * config/rs6000/freebsd-unwind.h (frob_update_context): Likewise.
2022-10-02Adjust LIBGCC2_INCLUDES for VxWorks and augment commentOlivier Hainque1-8/+28
Investigating the reasons for libgcc build failures in a canadian context, orthogonally to the recent update of vxcrtstuff, exposed interesting differences in the way include search paths are managed between a regular Linux->VxWorks cross build and a canadian setup building a Windows->VxWorks toolchain in a Linux environment. This change augments the comment attached to LIBGCC2_INCLUDE in libgcc/config/t-vxworks to better describe the parameters at play. It also adjusts the addition of options for gcc/include and gcc/include-fixed to minimize the actual differences for libgcc in the two kinds of configurations. 2022-03-06 Olivier Hainque <hainque@adacore.com> libgcc/ * config/t-vxworks (LIBGCC2_INCLUDE): Augment comment. Move -I options for gcc/include and gcc/include-fixed at the end and make them -isystem.
2022-10-02Prevent secondary warning from diagnostic tweak in gthr-vxworks.hOlivier Hainque1-1/+4
Within gthr-vxworks.h, we prevent C++ errors from missing declarations in some system headers by prepending their inclusion with a #pragma GCC diagnostic ignored "-Wstrict-prototypes" But Wstrict-prototypes is internally registered as valid for C/ObjC only, not C++, and this trick in turn triggers a Wpragma warning with -Wsystem-headers. This change just arranges to ignore the secondary warning locally. 2021-02-03 Olivier Hainque <hainque@adacore.com> * config/gthr-vxworks.h: Prevent Wpragma warning for the pragma diagnostics on Wstrict-prototypes.
2022-09-29Improve comments and INITFINI macro use in vxcrtsutff.cOlivier Hainque1-8/+16
This change augments the comment attached to the use of auto-host.h in vxcrtstuff.c to better describe the reason for including it and for the associated series of #undef directives. It also augments the comment on dso_handle and removes a redundant guard on HAVE_INITFINI_ARRAY_SUPPORT for the shared version of the objects, nested within a section guarded on USE_INITFINI_ARRAY. 2022-09-29 Olivier Hainque <hainque@adacore.com> libgcc/ * config/vxcrtstuff.c: Improve the comment attached to the use of auto-host.h and of __dso_handle. Remove redundant guard on HAVE_INITFINI_ARRAY_SUPPORT within a USE_INITFINI_ARRAY section.
2022-09-20Daily bump.GCC Administrator1-0/+6
2022-09-19Fix PR target/99184: Wrong cast from double to 16-bit and 32-bit intsGeorg-Johann Lay1-50/+0
this patch fixed PR target/99184 which incorrectly rounded during 64-bit (long) double to 16-bit and 32-bit integers. The patch just removes the respective roundings from libf7-asm.sx::to_integer and ::to_unsigned. Luckily, LibF7 does nowhere use respective functions internally, the only user is in libf7.c::f7_exp which reads f7_round (qq, qq); int16_t q = f7_get_s16 (qq); so that f7_get_s16() operates on an already rounded value, and therefore this code works unaltered with or without rounding in to_integer. PR target/99184 libgcc/config/avr/libf7/ * libf7-asm.sx (to_integer, to_unsigned): Don't round 16-bit and 32-bit integers.
2022-08-26cr16: remove obsoleted portMartin Liska9-2617/+0
contrib/ChangeLog: * config-list.mk: Remove cr16. gcc/ChangeLog: * doc/extend.texi: Remove cr16 related stuff. * doc/install.texi: Likewise. * doc/invoke.texi: Likewise. * doc/md.texi: Likewise. * function-tests.cc (test_expansion_to_rtl): Likewise. * common/config/cr16/cr16-common.cc: Removed. * config/cr16/constraints.md: Removed. * config/cr16/cr16-protos.h: Removed. * config/cr16/cr16.cc: Removed. * config/cr16/cr16.h: Removed. * config/cr16/cr16.md: Removed. * config/cr16/cr16.opt: Removed. * config/cr16/predicates.md: Removed. * config/cr16/t-cr16: Removed. libgcc/ChangeLog: * config.host: Remove cr16 related stuff. * config/cr16/crti.S: Removed. * config/cr16/crtlibid.S: Removed. * config/cr16/crtn.S: Removed. * config/cr16/divmodhi3.c: Removed. * config/cr16/lib1funcs.S: Removed. * config/cr16/t-cr16: Removed. * config/cr16/t-crtlibid: Removed. * config/cr16/unwind-cr16.c: Removed. * config/cr16/unwind-dw2.h: Removed. gcc/testsuite/ChangeLog: * lib/target-supports.exp: Remove cr16 related stuff.
2022-08-16RISC-V: Support _Float16 type.Kito Cheng3-0/+9
RISC-V decide use _Float16 as primary IEEE half precision type, and this already become part of psABI, this patch has added folloing support for _Float16: - Soft-float support for _Float16. - Make sure _Float16 available on C++ mode. - Name mangling for _Float16 on C++ mode. gcc/ChangeLog * config/riscv/riscv-builtins.cc: include stringpool.h (riscv_float16_type_node): New. (riscv_init_builtin_types): Ditto. (riscv_init_builtins): Call riscv_init_builtin_types. * config/riscv/riscv-modes.def (HF): New. * config/riscv/riscv.cc (riscv_output_move): Handle HFmode. (riscv_mangle_type): New. (riscv_scalar_mode_supported_p): Ditto. (riscv_libgcc_floating_mode_supported_p): Ditto. (riscv_excess_precision): Ditto. (riscv_floatn_mode): Ditto. (riscv_init_libfuncs): Ditto. (TARGET_MANGLE_TYPE): Ditto. (TARGET_SCALAR_MODE_SUPPORTED_P): Ditto. (TARGET_LIBGCC_FLOATING_MODE_SUPPORTED_P): Ditto. (TARGET_INIT_LIBFUNCS): Ditto. (TARGET_C_EXCESS_PRECISION): Ditto. (TARGET_FLOATN_MODE): Ditto. * config/riscv/riscv.md (mode): Add HF. (softload): Add HF. (softstore): Ditto. (fmt): Ditto. (UNITMODE): Ditto. (movhf): New. (*movhf_softfloat): New. libgcc/ChangeLog: * config/riscv/sfp-machine.h (_FP_NANFRAC_H): New. (_FP_NANFRAC_H): Ditto. (_FP_NANSIGN_H): Ditto. * config/riscv/t-softfp32 (softfp_extensions): Add HF related routines. (softfp_truncations): Ditto. (softfp_extras): Ditto. * config/riscv/t-softfp64 (softfp_extras): Add HF related routines. gcc/testsuite/ChangeLog: * g++.target/riscv/_Float16.C: New. * gcc.target/riscv/_Float16-soft-1.c: Ditto. * gcc.target/riscv/_Float16-soft-2.c: Ditto. * gcc.target/riscv/_Float16-soft-3.c: Ditto. * gcc.target/riscv/_Float16-soft-4.c: Ditto. * gcc.target/riscv/_Float16.c: Ditto.
2022-07-18libgcc/arc: Update udivmodsi4 and make the lib safe for rf16Claudiu Zissulescu2-1/+3
The ARC soft udivmodsi4 algorithm and as well as using umodsi3 for reduced register set configurations are wrong. libgcc/ * config/arc/lib2funcs.c (udivmodsi4): Update AND mask. * config/arc/lib1funcs.S (umodsi3): Don't use it for RF16 configurations.
2022-06-25Remove long deprecated tilegx and tilepro portsJeff Law14-1652/+0
/ * MAINTAINERS: Remove tilegx and tilepro entries. * configure.ac: Remove tilegx and tilepro stanzas. * configure: Rebuilt. contrib/ * config-list.mk: Remove tilegx and tilepro entries. * gcc_update: Remove tilegx and tilepro entries. gcc/ * common/config/tilegx/tilegx-common.cc: Removed. * common/config/tilepro/tilepro-common.cc: Removed. * config.gcc: Remove tilegx and tilepro entries. * config/tilegx/constraints.md: Removed. * config/tilegx/feedback.h: Removed. * config/tilegx/linux.h: Removed. * config/tilegx/mul-tables.cc: Removed. * config/tilegx/predicates.md: Removed. * config/tilegx/sync.md: Removed. * config/tilegx/t-tilegx: Removed. * config/tilegx/tilegx-builtins.h: Removed. * config/tilegx/tilegx-c.cc: Removed. * config/tilegx/tilegx-generic.md: Removed. * config/tilegx/tilegx-modes.def: Removed. * config/tilegx/tilegx-multiply.h: Removed. * config/tilegx/tilegx-opts.h: Removed. * config/tilegx/tilegx-protos.h: Removed. * config/tilegx/tilegx.cc: Removed. * config/tilegx/tilegx.h: Removed. * config/tilegx/tilegx.md: Removed. * config/tilegx/tilegx.opt: Removed. * config/tilepro/constraints.md: Removed. * config/tilepro/feedback.h: Removed. * config/tilepro/gen-mul-tables.cc: Removed. * config/tilepro/linux.h: Removed. * config/tilepro/mul-tables.cc: Removed. * config/tilepro/predicates.md: Removed. * config/tilepro/t-tilepro: Removed. * config/tilepro/tilepro-builtins.h: Removed. * config/tilepro/tilepro-c.cc: Removed. * config/tilepro/tilepro-generic.md: Removed. * config/tilepro/tilepro-modes.def: Removed. * config/tilepro/tilepro-multiply.h: Removed. * config/tilepro/tilepro-protos.h: Removed. * config/tilepro/tilepro.cc: Removed. * config/tilepro/tilepro.h: Removed. * config/tilepro/tilepro.md: Removed. * config/tilepro/tilepro.opt: Removed. * configure.ac: Remove tilegx and tilepro entries. * configure: Rebuilt. * doc/extend.texi: Remove tilegx and tilepro entries. * doc/install.texi: Remove tilegx and tilepro entries. * doc/invoke.texi: Remove tilegx and tilepro entries. * doc/md.texi: Remove tilegx and tilepro entries. gcc/testsuite/ * gcc.dg/lower-subreg-1.c: Remove tilegx and tilepro entries. * gcc.misc-tests/linkage.exp: Remove tilegx and tilepro entries. libgcc/ * config.host: Removed tilegx and tilepro entries. * config/tilegx/sfp-machine.h: Removed. * config/tilegx/sfp-machine32.h: Removed. * config/tilegx/sfp-machine64.h: Removed. * config/tilegx/t-crtstuff: Removed. * config/tilegx/t-softfp: Removed. * config/tilegx/t-tilegx: Removed. * config/tilepro/atomic.c: Removed. * config/tilepro/atomic.h: Removed. * config/tilepro/linux-unwind.h: Removed. * config/tilepro/sfp-machine.h: Removed. * config/tilepro/softdivide.c: Removed. * config/tilepro/softmpy.S: Removed. * config/tilepro/t-crtstuff: Removed. * config/tilepro/t-tilepro: Removed.
2022-06-09xtensa: Add clrsbsi2 insn patternTakayuki 'January June' Suwa2-1/+24
> (clrsb:m x) > Represents the number of redundant leading sign bits in x, represented > as an integer of mode m, starting at the most significant bit position. This explanation is just what the NSA instruction (not ever emitted before) calculates in Xtensa ISA. gcc/ChangeLog: * config/xtensa/xtensa.md (clrsbsi2): New insn pattern. libgcc/ChangeLog: * config/xtensa/lib1funcs.S (__clrsbsi2): New function. * config/xtensa/t-xtensa (LIB1ASMFUNCS): Add _clrsbsi2.
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