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* Add femode_t functions: sparc.Joseph Myers2016-09-072-0/+64
| | | | | | | This patch adds SPARC versions of fegetmode and fesetmode. Untested. * sysdeps/sparc/fpu/fegetmode.c: New file. * sysdeps/sparc/fpu/fesetmode.c: Likewise.
* Add femode_t functions: sh.Joseph Myers2016-09-072-0/+65
| | | | | | | This patch adds SH versions of fegetmode and fesetmode. Untested. * sysdeps/sh/sh4/fpu/fegetmode.c: New file. * sysdeps/sh/sh4/fpu/fesetmode.c: Likewise.
* Add femode_t functions: s390.Joseph Myers2016-09-072-0/+66
| | | | | | | This patch adds S/390 versions of fegetmode and fesetmode. Untested. * sysdeps/s390/fpu/fegetmode.c: New file. * sysdeps/s390/fpu/fesetmode.c: Likewise.
* Add femode_t functions: powerpc.Joseph Myers2016-09-076-0/+222
| | | | | | | | | | | This patch adds PowerPC versions of fegetmode and fesetmode. * sysdeps/powerpc/fpu/fegetmode.c: New file. * sysdeps/powerpc/fpu/fesetmode.c: Likewise. * sysdeps/powerpc/nofpu/fegetmode.c: Likewise. * sysdeps/powerpc/nofpu/fesetmode.c: Likewise. * sysdeps/powerpc/powerpc32/e500/nofpu/fegetmode.c: Likewise. * sysdeps/powerpc/powerpc32/e500/nofpu/fesetmode.c: Likewise.
* Add femode_t functions: mips.Joseph Myers2016-09-072-0/+65
| | | | | | | This patch adds MIPS versions of fegetmode and fesetmode. * sysdeps/mips/fpu/fegetmode.c: New file. * sysdeps/mips/fpu/fesetmode.c: Likewise.
* Add femode_t functions: m68k.Joseph Myers2016-09-072-0/+59
| | | | | | | This patch adds M68K versions of fegetmode and fesetmode. Untested. * sysdeps/m68k/fpu/fegetmode.c: New file. * sysdeps/m69k/fpu/fesetmode.c: Likewise.
* Add femode_t functions: ia64.Joseph Myers2016-09-072-0/+68
| | | | | | | This patch adds IA64 versions of fegetmode and fesetmode. Untested. * sysdeps/ia64/fpu/fegetmode.c: New file. * sysdeps/ia64/fpu/fesetmode.c: Likewise.
* Add femode_t functions: hppa.Joseph Myers2016-09-072-0/+63
| | | | | | | This patch adds HPPA versions of fegetmode and fesetmode. Untested. * sysdeps/hppa/fpu/fegetmode.c: New file. * sysdeps/hppa/fpu/fesetmode.c: Likewise.
* Add femode_t functions: arm.Joseph Myers2016-09-072-0/+74
| | | | | | | This patch adds ARM versions of fegetmode and fesetmode. * sysdeps/arm/fegetmode.c: New file. * sysdeps/arm/fesetmode.c: Likewise.
* Add femode_t functions: alpha.Joseph Myers2016-09-072-0/+77
| | | | | | | This patch adds Alpha versions of fegetmode and fesetmode. Untested. * sysdeps/alpha/fpu/fegetmode.c: New file. * sysdeps/alpha/fpu/fesetmode.c: Likewise.
* Add femode_t functions: aarch64.Joseph Myers2016-09-072-0/+61
| | | | | | | | This patch adds AArch64 versions of fegetmode and fesetmode. Untested. * sysdeps/aarch64/fpu/fegetmode.c: New file. * sysdeps/aarch64/fpu/fesetmode.c: Likewise.
* Add femode_t functions.Joseph Myers2016-09-0750-0/+364
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | TS 18661-1 defines a type femode_t to represent the set of dynamic floating-point control modes (such as the rounding mode and trap enablement modes), and functions fegetmode and fesetmode to manipulate those modes (without affecting other state such as the raised exception flags) and a corresponding macro FE_DFL_MODE. This patch series implements those interfaces for glibc. This first patch adds the architecture-independent pieces, the x86 and x86_64 implementations, and the <bits/fenv.h> and ABI baseline updates for all architectures so glibc keeps building and passing the ABI tests on all architectures. Subsequent patches add the fegetmode and fesetmode implementations for other architectures. femode_t is generally an integer type - the same type as fenv_t, or as the single element of fenv_t where fenv_t is a structure containing a single integer (or the single relevant element, where it has elements for both status and control registers) - except where architecture properties or consistency with the fenv_t implementation indicate otherwise. FE_DFL_MODE follows FE_DFL_ENV in whether it's a magic pointer value (-1 cast to const femode_t *), a value that can be distinguished from valid pointers by its high bits but otherwise contains a representation of the desired register contents, or a pointer to a constant variable (the powerpc case; __fe_dfl_mode is added as an exported constant object, an alias to __fe_dfl_env). Note that where architectures (that share a register between control and status bits) gain definitions of new floating-point control or status bits in future, the implementations of fesetmode for those architectures may need updating (depending on whether the new bits are control or status bits and what the implementation does with previously unknown bits), just like existing implementations of <fenv.h> functions that take care not to touch reserved bits may need updating when the set of reserved bits changes. (As any new bits are outside the scope of ISO C, that's just a quality-of-implementation issue for supporting them, not a conformance issue.) As with fenv_t, femode_t should properly include any software DFP rounding mode (and for both fenv_t and femode_t I'd consider that fragment of DFP support appropriate for inclusion in glibc even in the absence of the rest of libdfp; hardware DFP rounding modes should already be included if the definitions of which bits are status / control bits are correct). Tested for x86_64, x86, mips64 (hard float, and soft float to test the fallback version), arm (hard float) and powerpc (hard float, soft float and e500). Other architecture versions are untested. * math/fegetmode.c: New file. * math/fesetmode.c: Likewise. * sysdeps/i386/fpu/fegetmode.c: Likewise. * sysdeps/i386/fpu/fesetmode.c: Likewise. * sysdeps/x86_64/fpu/fegetmode.c: Likewise. * sysdeps/x86_64/fpu/fesetmode.c: Likewise. * math/fenv.h: Update comment on inclusion of <bits/fenv.h>. [__GLIBC_USE (IEC_60559_BFP_EXT)] (fegetmode): New function declaration. [__GLIBC_USE (IEC_60559_BFP_EXT)] (fesetmode): Likewise. * bits/fenv.h [__GLIBC_USE (IEC_60559_BFP_EXT)] (femode_t): New typedef. [__GLIBC_USE (IEC_60559_BFP_EXT)] (FE_DFL_MODE): New macro. * sysdeps/aarch64/bits/fenv.h [__GLIBC_USE (IEC_60559_BFP_EXT)] (femode_t): New typedef. [__GLIBC_USE (IEC_60559_BFP_EXT)] (FE_DFL_MODE): New macro. * sysdeps/alpha/fpu/bits/fenv.h [__GLIBC_USE (IEC_60559_BFP_EXT)] (femode_t): New typedef. [__GLIBC_USE (IEC_60559_BFP_EXT)] (FE_DFL_MODE): New macro. * sysdeps/arm/bits/fenv.h [__GLIBC_USE (IEC_60559_BFP_EXT)] (femode_t): New typedef. [__GLIBC_USE (IEC_60559_BFP_EXT)] (FE_DFL_MODE): New macro. * sysdeps/hppa/fpu/bits/fenv.h [__GLIBC_USE (IEC_60559_BFP_EXT)] (femode_t): New typedef. [__GLIBC_USE (IEC_60559_BFP_EXT)] (FE_DFL_MODE): New macro. * sysdeps/ia64/bits/fenv.h [__GLIBC_USE (IEC_60559_BFP_EXT)] (femode_t): New typedef. [__GLIBC_USE (IEC_60559_BFP_EXT)] (FE_DFL_MODE): New macro. * sysdeps/m68k/fpu/bits/fenv.h [__GLIBC_USE (IEC_60559_BFP_EXT)] (femode_t): New typedef. [__GLIBC_USE (IEC_60559_BFP_EXT)] (FE_DFL_MODE): New macro. * sysdeps/microblaze/bits/fenv.h [__GLIBC_USE (IEC_60559_BFP_EXT)] (femode_t): New typedef. [__GLIBC_USE (IEC_60559_BFP_EXT)] (FE_DFL_MODE): New macro. * sysdeps/mips/bits/fenv.h [__GLIBC_USE (IEC_60559_BFP_EXT)] (femode_t): New typedef. [__GLIBC_USE (IEC_60559_BFP_EXT)] (FE_DFL_MODE): New macro. * sysdeps/nios2/bits/fenv.h [__GLIBC_USE (IEC_60559_BFP_EXT)] (femode_t): New typedef. [__GLIBC_USE (IEC_60559_BFP_EXT)] (FE_DFL_MODE): New macro. * sysdeps/powerpc/bits/fenv.h [__GLIBC_USE (IEC_60559_BFP_EXT)] (femode_t): New typedef. [__GLIBC_USE (IEC_60559_BFP_EXT)] (__fe_dfl_mode): New variable declaration. [__GLIBC_USE (IEC_60559_BFP_EXT)] (FE_DFL_MODE): New macro. * sysdeps/s390/fpu/bits/fenv.h [__GLIBC_USE (IEC_60559_BFP_EXT)] (femode_t): New typedef. [__GLIBC_USE (IEC_60559_BFP_EXT)] (FE_DFL_MODE): New macro. * sysdeps/sh/bits/fenv.h [__GLIBC_USE (IEC_60559_BFP_EXT)] (femode_t): New typedef. [__GLIBC_USE (IEC_60559_BFP_EXT)] (FE_DFL_MODE): New macro. * sysdeps/sparc/fpu/bits/fenv.h [__GLIBC_USE (IEC_60559_BFP_EXT)] (femode_t): New typedef. [__GLIBC_USE (IEC_60559_BFP_EXT)] (FE_DFL_MODE): New macro. * sysdeps/tile/bits/fenv.h [__GLIBC_USE (IEC_60559_BFP_EXT)] (femode_t): New typedef. [__GLIBC_USE (IEC_60559_BFP_EXT)] (FE_DFL_MODE): New macro. * sysdeps/x86/fpu/bits/fenv.h [__GLIBC_USE (IEC_60559_BFP_EXT)] (femode_t): New typedef. [__GLIBC_USE (IEC_60559_BFP_EXT)] (FE_DFL_MODE): New macro. * manual/arith.texi (FE_DFL_MODE): Document macro. (fegetmode): Document function. (fesetmode): Likewise. * math/Versions (fegetmode): New libm symbol at version GLIBC_2.25. (fesetmode): Likewise. * math/Makefile (libm-support): Add fegetmode and fesetmode. (tests): Add test-femode and test-femode-traps. * math/test-femode-traps.c: New file. * math/test-femode.c: Likewise. * sysdeps/powerpc/fpu/fenv_const.c (__fe_dfl_mode): Declare as alias for __fe_dfl_env. * sysdeps/powerpc/nofpu/fenv_const.c (__fe_dfl_mode): Likewise. * sysdeps/powerpc/powerpc32/e500/nofpu/fenv_const.c (__fe_dfl_mode): Likewise. * sysdeps/powerpc/Versions (__fe_dfl_mode): New libm symbol at version GLIBC_2.25. * sysdeps/nacl/libm.abilist: Update. * sysdeps/unix/sysv/linux/aarch64/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/alpha/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/arm/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/hppa/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/i386/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/ia64/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/m68k/coldfire/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/m68k/m680x0/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/microblaze/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/mips/mips32/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/mips/mips64/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/nios2/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/powerpc/powerpc32/fpu/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/powerpc/powerpc32/nofpu/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/powerpc/powerpc64/libm-le.abilist: Likewise. * sysdeps/unix/sysv/linux/powerpc/powerpc64/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/s390/s390-32/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/s390/s390-64/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/sh/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/sparc/sparc32/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/sparc/sparc64/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/tile/tilegx/tilegx32/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/tile/tilegx/tilegx64/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/tile/tilepro/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/x86_64/64/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/x86_64/x32/libm.abilist: Likewise.
* X86-64: Add _dl_runtime_resolve_avx[512]_{opt|slow} [BZ #20508]H.J. Lu2016-09-065-3/+165
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | There is transition penalty when SSE instructions are mixed with 256-bit AVX or 512-bit AVX512 load instructions. Since _dl_runtime_resolve_avx and _dl_runtime_profile_avx512 save/restore 256-bit YMM/512-bit ZMM registers, there is transition penalty when SSE instructions are used with lazy binding on AVX and AVX512 processors. To avoid SSE transition penalty, if only the lower 128 bits of the first 8 vector registers are non-zero, we can preserve %xmm0 - %xmm7 registers with the zero upper bits. For AVX and AVX512 processors which support XGETBV with ECX == 1, we can use XGETBV with ECX == 1 to check if the upper 128 bits of YMM registers or the upper 256 bits of ZMM registers are zero. We can restore only the non-zero portion of vector registers with AVX/AVX512 load instructions which will zero-extend upper bits of vector registers. This patch adds _dl_runtime_resolve_sse_vex which saves and restores XMM registers with 128-bit AVX store/load instructions. It is used to preserve YMM/ZMM registers when only the lower 128 bits are non-zero. _dl_runtime_resolve_avx_opt and _dl_runtime_resolve_avx512_opt are added and used on AVX/AVX512 processors supporting XGETBV with ECX == 1 so that we store and load only the non-zero portion of vector registers. This avoids SSE transition penalty caused by _dl_runtime_resolve_avx and _dl_runtime_profile_avx512 when only the lower 128 bits of vector registers are used. _dl_runtime_resolve_avx_slow is added and used for AVX processors which don't support XGETBV with ECX == 1. Since there is no SSE transition penalty on AVX512 processors which don't support XGETBV with ECX == 1, _dl_runtime_resolve_avx512_slow isn't provided. [BZ #20495] [BZ #20508] * sysdeps/x86/cpu-features.c (init_cpu_features): For Intel processors, set Use_dl_runtime_resolve_slow and set Use_dl_runtime_resolve_opt if XGETBV suports ECX == 1. * sysdeps/x86/cpu-features.h (bit_arch_Use_dl_runtime_resolve_opt): New. (bit_arch_Use_dl_runtime_resolve_slow): Likewise. (index_arch_Use_dl_runtime_resolve_opt): Likewise. (index_arch_Use_dl_runtime_resolve_slow): Likewise. * sysdeps/x86_64/dl-machine.h (elf_machine_runtime_setup): Use _dl_runtime_resolve_avx512_opt and _dl_runtime_resolve_avx_opt if Use_dl_runtime_resolve_opt is set. Use _dl_runtime_resolve_slow if Use_dl_runtime_resolve_slow is set. * sysdeps/x86_64/dl-trampoline.S: Include <cpu-features.h>. (_dl_runtime_resolve_opt): New. Defined for AVX and AVX512. (_dl_runtime_resolve): Add one for _dl_runtime_resolve_sse_vex. * sysdeps/x86_64/dl-trampoline.h (_dl_runtime_resolve_avx_slow): New. (_dl_runtime_resolve_opt): Likewise. (_dl_runtime_profile): Define only if _dl_runtime_profile is defined.
* S390: Support PLT and GOT references in check-localplt.Stefan Liebler2016-09-061-1/+8
| | | | | | | | | | | | | | | | | | | | | | | | on s390x the test elf/check-localplt is failing after recent commits: "elf: Do not use memalign for TCB/TLS blocks allocation [BZ #17730]" "elf: Avoid using memalign for TLS allocations [BZ #17730]" "elf: dl-minimal malloc needs to respect fundamental alignment" due to "Missing required PLT reference: ld.so: __libc_memalign". After the commits __libc_memalign is only called in elf/dl-minimal.c in malloc() function in ld.so and gcc -O2/-O3 leads to R_390_GLOB_DAT instead of R_390_JMP_SLOT. __libc_memalign is called via function-pointer loaded from GOT instead of calling via a plt-stub. In this case there is the R_390_GLOB_DAT relocation in section .rela.dyn instead of R_390_JMP_SLOT in .rela.plt. This patch marks ld.so: __libc_memalign with R_390_GLOB_DAT in localplt.data to allow both relocations. If build with -fno-optimize-sibling-calls or on s390(31bit) a R_390_JMP_SLOT is generated. ChangeLog: * sysdeps/unix/sysv/linux/s390/localplt.data: Mark ld.so: __libc_memalign with "+ RELA R_390_GLOB_DAT".
* NaCl: Fix compile error for __dup after libc_hidden_proto addition.Roland McGrath2016-09-021-0/+1
| | | | * sysdeps/nacl/dup.c: Add libc_hidden_def.
* Fix generic wait3 after union wait_status removal.Roland McGrath2016-09-021-1/+1
| | | | | * sysdeps/posix/wait3.c: Don't treat STAT_LOC as a union, since it's not any more.
* NaCl: Fix compile error in clock function.Roland McGrath2016-09-021-1/+1
| | | | * sysdeps/nacl/clock.c (clock): nacl_abi_clock_t -> nacl_irt_clock_t
* Inline all support functions for sin and cosSiddhesh Poyarekar2016-09-021-24/+28
| | | | | | | | | | | | | | | | | | | | | | The support functions for sin and cos have a lot of identical functionality, so inlining them gives a pretty decent jump in functionality: ~19% in the sincos function. On SPEC2006 this translates to about 2.1% in the tonto test. * sysdeps/ieee754/dbl-64/s_sin.c (do_cos): Mark as inline. (do_cos_slow): Likewise. (do_sin): Likewise. (do_sin_slow): Likewise. (slow): Likewise. (slow1): Likewise. (slow2): Likewise. (sloww): Likewise. (sloww1): Likewise. (sloww2): Likewise. (bsloww): Likewise. (bsloww1): Likewise. (bsloww2): Likewise. (cslow2): Likewise.
* Use do_sin for sin(x) where 0.25 < |x| < 0.855469Siddhesh Poyarekar2016-09-021-18/+3
| | | | | | | | The only code looks slightly different from do_sin but on closer examination, should give exactly the same result. Drop it in favour of the do_sin function call. * sysdeps/ieee754/dbl-64/s_sin.c (__sin): Use do_sin.
* Consolidate input partitioning into do_cos and do_sinSiddhesh Poyarekar2016-09-021-109/+82
| | | | | | | | | | | | | | | | | | | | | | | | All calls to do_cos are preceded by code that partitions x into a larger double that gives an offset into the sincos table and a smaller double that is used in a polynomial computation. Consolidate all of them into do_cos and do_sin to reduce code duplication. * sysdeps/ieee754/dbl-64/s_sin.c (do_cos): Accept X and DX as input arguments. Consolidate input partitioning from callers here. (do_cos_slow): Likewise. (do_sin): Likewise. (do_sin_slow): Likewise. (do_sincos_1): Remove the no longer necessary input partitioning. (do_sincos_2): Likewise. (__sin): Likewise. (__cos): Likewise. (slow1): Likewise. (slow2): Likewise. (sloww1): Likewise. (sloww2): Likewise. (bsloww1): Likewise. (bsloww2): Likewise. (cslow2): Likewise.
* Remove unneeded stubs for k_rem_pio2l.Paul E. Murphy2016-09-015-10/+0
| | | | | | | | | | This is only used for the float and double variants. Instead, just add it to the type specific list of files, and remove all stubs, and remove the declaration from math_private.h. I verified x86_64, i486, ia64, m68k, and ppc64 build.
* Make common fmin implementation generic.Paul E. Murphy2016-09-013-10/+1
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* Make common fmax implementation generic.Paul E. Murphy2016-09-016-13/+4
| | | | | Also update aarch64 to ensure the correct s_fmin.c is included. The include order favors including the generated copy.
* Make common nextdown implementation generic.Paul E. Murphy2016-09-011-0/+5
| | | | | | | | | | With the exception of those machines using the ldbl-opt in an Implies file, this is a trivial transformation. nextdownl is not subject to the non-trivial versioning rules of the other generated functions, so to keep things simple, it is handled as a one-off case in ldbl-opt to preserve the existing behavior.
* Make common fdim implementation generic.Paul E. Murphy2016-09-019-16/+19
| | | | | | | | | | | | | | The only difference is the usage of math_narrow_eval when building s_fdiml.c. This should be harmless for long double, but I did observe some code generation changes on m68k, but lack the resources to test it. Likewise, to more easily support overriding symbol generation, the aliasing macros are always conditionally defined on their absence to reduce boilerplate. I also ran builds for i486, ppc64, sparcv9, aarch64, s390x and observed no changes to s_fdim* objects.
* Base <sys/quota.h> on Linux kernel headers [BZ #20525]Florian Weimer2016-09-013-131/+98
| | | | | | | | Macros which are also defined in <linux/quota.h> are removed, and <linux/quota.h> is included instead. This commit cleans up the definition of fs_to_dq_blocks and struct dqblock and struct dqinfo, too.
* ldbl-128: Cleanup e_gammal_r.c after _Float128 renamePaul E. Murphy2016-08-311-6/+6
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* ldbl-128: Rename 'long double' to '_Float128'Paul E. Murphy2016-08-3177-620/+646
| | | | | | | | | | | | | | | | | | Add a layer of macro indirection for long double files which need to be built using another typename. Likewise, add the L(num) macro used in a later patch to override real constants. These macros are only defined through the ldbl-128 math_ldbl.h header, thereby implicitly restricting these macros to machines which back long double with an IEEE binary128 format. Likewise, appropriate changes are made for the few files which indirectly include such ldbl-128 files. These changes produce identical binaries for s390x, aarch64, and ppc64.
* S390: Do not set FE_INEXACT with feraiseexcept (FE_OWERFLOW|FE_UNDERFLOW).Stefan Liebler2016-08-314-6/+100
| | | | | | | | | | | | | | | | | | | | | | | | | On s390 feraiseexcept (FE_OVERFLOW|FE_UNDERFLOW) sets FE_INEXACT, too. This patch uses z196 zarch load rounded instruction which can suppress FE_INEXACT exception if gcc has z196 support in used configuration. Otherwise FE_INEXACT flag is set as before. The gcc support is tested in a new configure-check. A comment in fsetexcptflg.c is corrected as new exceptions are not executed with the next floating-point instruction if fpc is set with _FPU_SETCW macro. It seems the comment was copied e.g. from sysdeps/x86_64/fpu/fsetexcptflg.c file. ChangeLog: * config.h.in (HAVE_S390_MIN_Z196_ZARCH_ASM_SUPPORT): New undefine. * sysdeps/s390/configure.ac: Add test for z196 zarch support. * sysdeps/s390/configure: Regenerated. * sysdeps/s390/fpu/fraiseexcpt.c (__feraiseexcept): Use ledbra instruction for raising over-/underflow if z196 zarch is supported by default. * sysdeps/s390/fpu/fsetexcptflg.c (fesetexceptflag): Correct comment.
* hurd: Fix adjtime call with OLDDELTA == NULLSvante Signell2016-08-301-0/+4
| | | | | * sysdeps/mach/hurd/adjtime.c (__adjtime): When OLDDELTA is NULL, make it point to a dumb buffer for RPC to fill it.
* Use fabs(x) instead of branching on signedness of input to sin and cosSiddhesh Poyarekar2016-08-301-148/+85
| | | | | | | | | | | | | | | | | | | | | | | | | | | | The sin and cos code is inconsistent about its use of fabs to get the absolute value of X where in some places it conditionalizes the code while in others it uses fabs. fabs seems to be a better candidate in most cases because it avoids a branch. Similarly there is an attempt to make it easier for the compiler to emit conditional assignment instructions (like fcsel on aarch64) where it can, by isolating conditional assignment constructs from the rest of the expression. A further benefit of this change is to identify common constructs across functions and consolidate them in future patches. * sysdeps/ieee754/dbl-64/s_sin.c (do_cos_slow): Use ternary instead of if/else. (do_sin_slow): Likewise. (do_sincos_1): Use fabs instead of if/else. (do_sincos_2): Likewise. (__sin): Likewise. (__cos): Likewise. (slow2): Likewise. (sloww): Likewise. (sloww1): Likewise. Drop argument M. (sloww2): Use fabs instead of if/else. (bsloww): Likewise. (bsloww1): Likewise. (bsloww2): Likewise.
* Add fall through commentsSiddhesh Poyarekar2016-08-301-0/+2
| | | | Add fall through comments I had missed writing in previously.
* Consolidate reduce_and_compute codeSiddhesh Poyarekar2016-08-301-17/+14
| | | | | | | | | | | | This patch reshuffles the reduce_and_compute code so that the structure matches other code structures of the same type elsewhere in s_sin.c and s_sincos.c. This is the beginning of an attempt to consolidate and reduce code duplication in functions in s_sin.c to make it easier to read and possibly also easier for the compiler to optimize. * sysdeps/ieee754/dbl-64/s_sin.c (reduce_and_compute): Consolidate switch cases 0 and 2.
* Convert remaining complex function to generated filesPaul E. Murphy2016-08-2921-115/+80
| | | | | | Convert cpow, clog, clog10, cexp, csqrt, and cproj functions into generated templates. Note, ldbl-opt still retains s_clog10l.c as the aliasing rules are non-trivial.
* sparcv9: Restore fdiml@GLIBC_2.1Paul E. Murphy2016-08-291-1/+1
| | | | | Use s_fdim.c from sysdeps/ieee754/ldbl-opt/ instead of math/ to ensure a compat symbol for fdiml is created.
* Add fetestexceptflag.Joseph Myers2016-08-2928-0/+58
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | TS 18661-1 defines an fetestexceptflag function to test the exception state saved in an fexcept_t object by fegetexceptflag. This patch implements this function for glibc. Almost all architectures save exception state in such a way that it can be directly ANDed with exception flag bits, so rather than having lots of fetestexceptflag implementations that all do the same thing, the math/ implementation is made to use this generic logic (which is also OK in the fallback case where FE_ALL_EXCEPT is zero). The only architecture that seems to need anything different is s390. (fegetexceptflag and fesetexceptflag use abbreviated filenames fgetexcptflg.c and fsetexcptflg.c. Because we are no longer concerned by 14-character filename limits, fetestexceptflag uses the obvious filename fetestexceptflag.c.) The NEWS entry is intended to be expanded along the lines given in <https://sourceware.org/ml/libc-alpha/2016-08/msg00356.html> when fegetmode and fesetmode are added. Tested for x86_64, x86, mips64 and powerpc. * math/fetestexceptflag.c: New file. * sysdeps/s390/fpu/fetestexceptflag.c: Likewise. Comment by Stefan Liebler. * math/fenv.h [__GLIBC_USE (IEC_60559_BFP_EXT)] (fetestexceptflag): New function declaration. * manual/arith.texi (fetestexceptflag): Document function. * math/Versions (fetestexceptflag): New libm symbol at version GLIBC_2.25. * math/Makefile (libm-support): Add fetestexceptflag. (tests): Add test-fetestexceptflag. * math/test-fetestexceptflag.c: New file. * sysdeps/nacl/libm.abilist: Update. * sysdeps/unix/sysv/linux/aarch64/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/alpha/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/arm/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/hppa/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/i386/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/ia64/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/m68k/coldfire/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/m68k/m680x0/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/microblaze/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/mips/mips32/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/mips/mips64/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/nios2/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/powerpc/powerpc32/fpu/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/powerpc/powerpc32/nofpu/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/powerpc/powerpc64/libm-le.abilist: Likewise. * sysdeps/unix/sysv/linux/powerpc/powerpc64/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/s390/s390-32/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/s390/s390-64/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/sh/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/sparc/sparc32/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/sparc/sparc64/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/tile/tilegx/tilegx32/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/tile/tilegx/tilegx64/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/tile/tilepro/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/x86_64/64/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/x86_64/x32/libm.abilist: Likewise.
* malloc: Simplify static malloc interposition [BZ #20432]Florian Weimer2016-08-262-6/+6
| | | | | | | | Existing interposed mallocs do not define the glibc-internal fork callbacks (and they should not), so statically interposed mallocs lead to link failures because the strong reference from fork pulls in glibc's malloc, resulting in multiple definitions of malloc-related symbols.
* X86-64: Correct CFA in _dl_runtime_resolveH.J. Lu2016-08-261-0/+2
| | | | | | | | | When stack is re-aligned in _dl_runtime_resolve, there is no need to adjust CFA when allocating register save area on stack. * sysdeps/x86_64/dl-trampoline.h (_dl_runtime_resolve): Don't adjust CFA when allocating register save area on re-aligned stack.
* Convert _Complex tangent functions to generated codePaul E. Murphy2016-08-1912-64/+32
| | | | | | This converts s_c{,a}tan{,h}{f,,l} into a single templated file c{,a}tan{,h}_template.c with the exception of alpha.
* Convert _Complex sine functions to generated codePaul E. Murphy2016-08-1918-101/+42
| | | | | Refactor s_c{,a}sin{,h}{f,,l} into a single templated macro.
* X86: Change bit_YMM_state to (1 << 2)H.J. Lu2016-08-191-1/+1
| | | | | | | All other state bits, except for bit_YMM_state, are defined as (1 << N). This patch changes bit_YMM_state from (2 << 1) to (1 << 2). * sysdeps/x86/cpu-features.h (bit_YMM_state): Set to (1 << 2).
* Merge common usage of mul_split functionPaul E. Murphy2016-08-1911-346/+22
| | | | | | | | | | | A number of files share identical code for the mul_split function. This moves the duplicated function mul_split into its own header, and refactors the fma usage into a single selection macro. Likewise, mul_split when used by a long double implementation is renamed mul_splitl for clarity.
* Convert _Complex cosine functions to generated codePaul E. Murphy2016-08-1915-79/+38
| | | | | | This is fairly straight fowards. m68k overrides are updated to use the framework, and thus are simplified a bit.
* Fix incorrect double-checked locking related to _res_hconf.initialized.Torvald Riegel2016-08-181-2/+1
| | | | | | | | | | | | | | | | | | _res_hconf.initialized was not suitable for use in a multi-threaded environment due to the lack of atomics and memory barriers. Use of it was also unnecessary because _res_hconf_init did the right thing by using __libc_once. This patch fixes the glibc-internal uses by just calling _res_hconf_init unconditionally, and switches to a release MO atomic store for _res_hconf.initialized to fix the glibc side of the synchronization problem (which will maintain backward compatibility, but cannot fix the lack of acquire MO on any glibc-external loads). [BZ #20477] * resolv/res_hconf.c (do_init): Use atomic access. * resolv/res_hconf.h: Add comments. * nscd/aicache.c (addhstaiX): Call _res_hconf_init unconditionally. * nss/getXXbyYY_r.c (REENTRANT_NAME): Likewise. * sysdeps/posix/getaddrinfo.c (gaih_inet): Likewise.
* Get rid of array-bounds warning in __kernel_rem_pio2[f] with gcc 6.1 -O3.Stefan Liebler2016-08-182-0/+20
| | | | | | | | | | | | | | | | | | On s390x I get the following werror when build with gcc 6.1 (or current gcc head) and -O3: ../sysdeps/ieee754/dbl-64/k_rem_pio2.c: In function ‘__kernel_rem_pio2’: ../sysdeps/ieee754/dbl-64/k_rem_pio2.c:254:18: error: array subscript is below array bounds [-Werror=array-bounds] for (k = 1; iq[jk - k] == 0; k++) ~~^~~~~~~~ I get the same error with sysdeps/ieee754/flt-32/k_rem_pio2f.c. This patch adds DIAG_* macros around it. ChangeLog: * sysdeps/ieee754/dbl-64/k_rem_pio2.c (__kernel_rem_pio2): Use DIAG_*_NEEDS_COMMENT macro to get rid of array-bounds warning. * sysdeps/ieee754/flt-32/k_rem_pio2f.c (__kernel_rem_pio2f): Likewise.
* ldbl-128: Remove unused sqrtl declaration in e_asinl.cPaul E. Murphy2016-08-171-1/+0
| | | | | This did not alter compilation for s390x and aarch64 targets.
* Support for type-generic libm function implementations libmPaul E. Murphy2016-08-1716-60/+320
| | | | | | | | | | | | | | | | | | | | | | | This defines a new classes of libm objects. The <func>_template.c file which is used in conjunction with the new makefile hooks to derive variants for each type supported by the target machine. The headers math-type-macros-TYPE.h are used to supply macros to a common implementation of a function in a file named FUNC_template.c and glued togethor via a generated file matching existing naming in the build directory. This has the properties of preserving the existing override mechanism and not requiring any arcane build system twiddling. Likewise, it enables machines to override these files without any additional work. I have verified the built objects for ppc64, x86_64, alpha, arm, and m68k do not change in any meaningful way with these changes using the Fedora cross toolchains. I have verified the x86_64 and ppc64 changes still run.
* Do not override objects in libc.a in other static libraries [BZ #20452]Florian Weimer2016-08-1713-1/+16
| | | | | With this change, we no longer add sysdep.o and similar objects which are present in libc.a to other static libraries.
* Add fesetexcept: sparc.Joseph Myers2016-08-161-0/+31
| | | | | | This patch adds a SPARC version of fesetexcept. Untested. * sysdeps/sparc/fpu/fesetexcept.c: New file.
* Add fesetexcept: sh.Joseph Myers2016-08-161-0/+32
| | | | | | This patch adds an SH version of fesetexcept. Untested. * sysdeps/sh/sh4/fpu/fesetexcept.c: New file.
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