The x87 control word should be passed as an `unsigned short`. Previous
code passed `unsigned int`, and when building with `-masm=intel`,

   __asm__ __volatile__ ("fnstcw\t%0" : "=m" (_cw));

could expand to `fnstcw DWORD PTR [esp+48]` and cause errors like

   {standard input}: Assembler messages:
   {standard input}:7137: Error: operand size mismatch for `fnstcw'

libgcc/ChangeLog:

	PR target/122275
	* config/i386/32/dfp-machine.h (DFP_GET_ROUNDMODE): Change `_frnd_orig` to
	`unsigned short` for x87 control word.
	(DFP_SET_ROUNDMODE): Manipulate the x87 control word as `unsigned short`,
	and manipulate the MXCSR as `unsigned int`.

Signed-off-by: LIU Hao <lh_mouse@126.com>

This patch can obtain the CPUCFG and HWCAP value at runtime and
extract the flag bits of features for function selection.
HWCAP is used to obtain the support of LSX and LASX because the
kernel can control the enable/disable of these two features.

Note that this requires glibc version 2.38 or higher to compile
and run.

libgcc/ChangeLog:

	* config/loongarch/t-loongarch64: Add cpuinfo.c to LIB2ADD.
	* config/loongarch/cpuinfo.c: New file.

This matches what VXWORKS_ADDITIONAL_CPP_SPEC does, allowing libgcc to
build without VSB_DIR defined in the environment as soon as the configure
switches featured a proper --with-build-sysroot was provided.

Tested with a successful build for --target=powerpc-wrs-vxworks7r2
using mainline sources.

2025-10-23  Olivier Hainque  <hainque@adacore.com>

libgcc/
	* config/t-vxworks (LIBGCC2_INCLUDES): Replace $(VSB_DIR)
	by sysroot references.

VxWorks provides its own version of the standard stdatomic.h, possibly
relying on non-gcc builtins, and our implementation of the gthr API resorts
to VxWorks specific functions for atomicity features.

When compiling libgcc (with gcc), make sure gcc's version of stdatomic.h
is used: #include it here, first, then define the macro used to guard the
system version so it doesn't get expanded when included indirectly by
other system headers.

2025-10-20  Olivier Hainque  <hainque@adacore.com>
	    Ashley Gay  <gay@adacore.com>

libgcc/
	* config/gthr-vxworks.h: Include stdatomic.h and prevent indirect
	inclusion of contents from the system version of that header.

This addresses a variety of warnings about missing prototypes
or suspicious ptr-to-function conversions.

libgcc/
	* config/gthr-vxworks-thread.c (__init_gthread_tcb): Make static.
	(__delete_gthread_tcb): Likewise.
	(__task_wrapper): Likewise.
	(__gthread_create): Convert __task_wrapper to (void *) before going
	to (FUNCPTR).
	* config/gthr-vxworks-tls.c (tls_delete_hook): Accommodate prototype
	variations between kernel and rtp. Return STATUS.

This change moves, for VxWorks 7, the setting of the TOOL
and TOOL_FAMILY macros from a builtin_define to a run-time
computation from vxworks-predefs.h.

This is useful on Vx7 to allow a single toolchain to be used
for instances of VxWorks based on either a gnu or an llvm system
toolchain for a given cpu (typically, powerpc).

This is achieved by leveraging the existence of a very basic
autoconf.h file in all VxWorks 7 VSBs, #included directly from
vxworks-predef.h.

gcc/
	* config/vxworks.h (VXWORKS_OS_CPP_BUILTINS): Only
	builtin_define TOOL and TOOL_FAMILY for !TARGET_VXWORKS7.
	Augment comment on VXWORKS_PERSONALITY.
	* config/vxworks/vxworks-predef.h: Infer TOOL and TOOL_FAMILY
	from the VSB autoconf.h	when we have one, determined by the presence
	of a _VSB_CONFIG_FILE definition.

libgcc/
	* config/t-vxworks: -include vxworks-predef.h explicitly, as the
	automatic inclusion is disabled by -nostdinc.