gcc-6-source 6.4.0-17ubuntu1 / usr / src / gcc-6 / debian / patches / gcc-linaro-doc.diff

# DP: Changes for the Linaro 6-2017.11 snapshot (documentation).

--- a/src/gcc/doc/cpp.texi
+++ b/src/gcc/doc/cpp.texi
@@ -1984,7 +1984,7 @@ by GCC, or a non-GCC compiler that claims to accept the GNU C dialects,
 you can simply test @code{__GNUC__}.  If you need to write code
 which depends on a specific version, you must be more careful.  Each
 time the minor version is increased, the patch level is reset to zero;
-each time the major version is increased (which happens rarely), the
+each time the major version is increased, the
 minor version and patch level are reset.  If you wish to use the
 predefined macros directly in the conditional, you will need to write it
 like this:
--- a/src/gcc/doc/extend.texi
+++ b/src/gcc/doc/extend.texi
@@ -11416,6 +11416,7 @@ instructions, but allow the compiler to schedule those calls.
 * ARM iWMMXt Built-in Functions::
 * ARM C Language Extensions (ACLE)::
 * ARM Floating Point Status and Control Intrinsics::
+* ARM ARMv8-M Security Extensions::
 * AVR Built-in Functions::
 * Blackfin Built-in Functions::
 * FR-V Built-in Functions::
@@ -12260,6 +12261,35 @@ unsigned int __builtin_arm_get_fpscr ()
 void __builtin_arm_set_fpscr (unsigned int)
 @end smallexample
 
+@node ARM ARMv8-M Security Extensions
+@subsection ARM ARMv8-M Security Extensions
+
+GCC implements the ARMv8-M Security Extensions as described in the ARMv8-M
+Security Extensions: Requiremenets on Development Tools Engineering
+Specification, which can be found at
+@uref{http://infocenter.arm.com/help/topic/com.arm.doc.ecm0359818/ECM0359818_armv8m_security_extensions_reqs_on_dev_tools_1_0.pdf}.
+
+As part of the Security Extensions GCC implements two new function attributes:
+@code{cmse_nonsecure_entry} and @code{cmse_nonsecure_call}.
+
+As part of the Security Extensions GCC implements the intrinsics below.  FPTR
+is used here to mean any function pointer type.
+
+@smallexample
+cmse_address_info_t cmse_TT (void *)
+cmse_address_info_t cmse_TT_fptr (FPTR)
+cmse_address_info_t cmse_TTT (void *)
+cmse_address_info_t cmse_TTT_fptr (FPTR)
+cmse_address_info_t cmse_TTA (void *)
+cmse_address_info_t cmse_TTA_fptr (FPTR)
+cmse_address_info_t cmse_TTAT (void *)
+cmse_address_info_t cmse_TTAT_fptr (FPTR)
+void * cmse_check_address_range (void *, size_t, int)
+typeof(p) cmse_nsfptr_create (FPTR p)
+intptr_t cmse_is_nsfptr (FPTR)
+int cmse_nonsecure_caller (void)
+@end smallexample
+
 @node AVR Built-in Functions
 @subsection AVR Built-in Functions
 
--- a/src/gcc/doc/fragments.texi
+++ b/src/gcc/doc/fragments.texi
@@ -156,15 +156,16 @@ variants.  And for some targets it is better to reuse an existing multilib
 than to fall back to default multilib when there is no corresponding multilib.
 This can be done by adding reuse rules to @code{MULTILIB_REUSE}.
 
-A reuse rule is comprised of two parts connected by equality sign.  The left part
-is option set used to build multilib and the right part is option set that will
-reuse this multilib.  The order of options in the left part matters and should be
-same with those specified in @code{MULTILIB_REQUIRED} or aligned with order in
-@code{MULTILIB_OPTIONS}.  There is no such limitation for options in right part
-as we don't build multilib from them.  But the equality sign in both parts should
-be replaced with period.
-
-The @code{MULTILIB_REUSE} is different from @code{MULTILIB_MATCHES} in that it
+A reuse rule is comprised of two parts connected by equality sign.  The left
+part is the option set used to build multilib and the right part is the option
+set that will reuse this multilib.  Both parts should only use options
+specified in @code{MULTILIB_OPTIONS} and the equality signs found in options
+name should be replaced with periods.  The order of options in the left part
+matters and should be same with those specified in @code{MULTILIB_REQUIRED} or
+aligned with the order in @code{MULTILIB_OPTIONS}.  There is no such limitation
+for options in the right part as we don't build multilib from them.
+
+@code{MULTILIB_REUSE} is different from @code{MULTILIB_MATCHES} in that it
 sets up relations between two option sets rather than two options.  Here is an
 example to demo how we reuse libraries built in Thumb mode for applications built
 in ARM mode:
--- a/src/gcc/doc/install.texi
+++ b/src/gcc/doc/install.texi
@@ -1106,19 +1106,59 @@ sysv, aix.
 
 @item --with-multilib-list=@var{list}
 @itemx --without-multilib-list
-Specify what multilibs to build.
-Currently only implemented for arm*-*-*, sh*-*-* and x86-64-*-linux*.
+Specify what multilibs to build.  @var{list} is a comma separated list of
+values, possibly consisting of a single value.  Currently only implemented
+for arm*-*-*, sh*-*-* and x86-64-*-linux*.  The accepted values and meaning
+for each target is given below.
 
 @table @code
 @item arm*-*-*
-@var{list} is either @code{default} or @code{aprofile}.  Specifying
-@code{default} is equivalent to omitting this option while specifying
-@code{aprofile} builds multilibs for each combination of ISA (@code{-marm} or
-@code{-mthumb}), architecture (@code{-march=armv7-a}, @code{-march=armv7ve},
-or @code{-march=armv8-a}), FPU available (none, @code{-mfpu=vfpv3-d16},
-@code{-mfpu=neon}, @code{-mfpu=vfpv4-d16}, @code{-mfpu=neon-vfpv4} or
-@code{-mfpu=neon-fp-armv8} depending on architecture) and floating-point ABI
-(@code{-mfloat-abi=softfp} or @code{-mfloat-abi=hard}).
+@var{list} is one of@code{default}, @code{aprofile} or @code{rmprofile}.
+Specifying @code{default} is equivalent to omitting this option, ie. only the
+default runtime library will be enabled.  Specifying @code{aprofile} or
+@code{rmprofile} builds multilibs for a combination of ISA, architecture,
+FPU available and floating-point ABI.
+
+The table below gives the combination of ISAs, architectures, FPUs and
+floating-point ABIs for which multilibs are built for each accepted value.
+
+@multitable @columnfractions .15 .28 .30
+@item Option @tab aprofile @tab rmprofile
+@item ISAs
+@tab @code{-marm} and @code{-mthumb}
+@tab @code{-mthumb}
+@item Architectures@*@*@*@*@*@*
+@tab default architecture@*
+@code{-march=armv7-a}@*
+@code{-march=armv7ve}@*
+@code{-march=armv8-a}@*@*@*
+@tab default architecture@*
+@code{-march=armv6s-m}@*
+@code{-march=armv7-m}@*
+@code{-march=armv7e-m}@*
+@code{-march=armv8-m.base}@*
+@code{-march=armv8-m.main}@*
+@code{-march=armv7}
+@item FPUs@*@*@*@*@*
+@tab none@*
+@code{-mfpu=vfpv3-d16}@*
+@code{-mfpu=neon}@*
+@code{-mfpu=vfpv4-d16}@*
+@code{-mfpu=neon-vfpv4}@*
+@code{-mfpu=neon-fp-armv8}
+@tab none@*
+@code{-mfpu=vfpv3-d16}@*
+@code{-mfpu=fpv4-sp-d16}@*
+@code{-mfpu=fpv5-sp-d16}@*
+@code{-mfpu=fpv5-d16}@*
+@item floating-point@/ ABIs@*@*
+@tab @code{-mfloat-abi=soft}@*
+@code{-mfloat-abi=softfp}@*
+@code{-mfloat-abi=hard}
+@tab @code{-mfloat-abi=soft}@*
+@code{-mfloat-abi=softfp}@*
+@code{-mfloat-abi=hard}
+@end multitable
 
 @item sh*-*-*
 @var{list} is a comma separated list of CPU names.  These must be of the
--- a/src/gcc/doc/invoke.texi
+++ b/src/gcc/doc/invoke.texi
@@ -573,6 +573,8 @@ Objective-C and Objective-C++ Dialects}.
 -mfix-cortex-a53-835769  -mno-fix-cortex-a53-835769 @gol
 -mfix-cortex-a53-843419  -mno-fix-cortex-a53-843419 @gol
 -mlow-precision-recip-sqrt -mno-low-precision-recip-sqrt@gol
+-mlow-precision-sqrt -mno-low-precision-sqrt@gol
+-mlow-precision-div -mno-low-precision-div @gol
 -march=@var{name}  -mcpu=@var{name}  -mtune=@var{name}}
 
 @emph{Adapteva Epiphany Options}
@@ -606,7 +608,6 @@ Objective-C and Objective-C++ Dialects}.
 @gccoptlist{-mapcs-frame  -mno-apcs-frame @gol
 -mabi=@var{name} @gol
 -mapcs-stack-check  -mno-apcs-stack-check @gol
--mapcs-float  -mno-apcs-float @gol
 -mapcs-reentrant  -mno-apcs-reentrant @gol
 -msched-prolog  -mno-sched-prolog @gol
 -mlittle-endian  -mbig-endian @gol
@@ -632,7 +633,9 @@ Objective-C and Objective-C++ Dialects}.
 -mneon-for-64bits @gol
 -mslow-flash-data @gol
 -masm-syntax-unified @gol
--mrestrict-it}
+-mrestrict-it @gol
+-mpure-code @gol
+-mcmse}
 
 @emph{AVR Options}
 @gccoptlist{-mmcu=@var{mcu} -maccumulate-args -mbranch-cost=@var{cost} @gol
@@ -9483,6 +9486,11 @@ Size of minimal partition for WHOPR (in estimated instructions).
 This prevents expenses of splitting very small programs into too many
 partitions.
 
+@item lto-max-partition
+Size of max partition for WHOPR (in estimated instructions).
+to provide an upper bound for individual size of partition.
+Meant to be used only with balanced partitioning.
+
 @item cxx-max-namespaces-for-diagnostic-help
 The maximum number of namespaces to consult for suggestions when C++
 name lookup fails for an identifier.  The default is 1000.
@@ -12833,9 +12841,9 @@ These options are defined for AArch64 implementations:
 @item -mabi=@var{name}
 @opindex mabi
 Generate code for the specified data model.  Permissible values
-are @samp{ilp32} for SysV-like data model where int, long int and pointer
-are 32-bit, and @samp{lp64} for SysV-like data model where int is 32-bit,
-but long int and pointer are 64-bit.
+are @samp{ilp32} for SysV-like data model where int, long int and pointers
+are 32 bits, and @samp{lp64} for SysV-like data model where int is 32 bits,
+but long int and pointers are 64 bits.
 
 The default depends on the specific target configuration.  Note that
 the LP64 and ILP32 ABIs are not link-compatible; you must compile your
@@ -12860,25 +12868,24 @@ Generate little-endian code.  This is the default when GCC is configured for an
 @item -mcmodel=tiny
 @opindex mcmodel=tiny
 Generate code for the tiny code model.  The program and its statically defined
-symbols must be within 1GB of each other.  Pointers are 64 bits.  Programs can
-be statically or dynamically linked.  This model is not fully implemented and
-mostly treated as @samp{small}.
+symbols must be within 1MB of each other.  Programs can be statically or
+dynamically linked.
 
 @item -mcmodel=small
 @opindex mcmodel=small
 Generate code for the small code model.  The program and its statically defined
-symbols must be within 4GB of each other.  Pointers are 64 bits.  Programs can
-be statically or dynamically linked.  This is the default code model.
+symbols must be within 4GB of each other.  Programs can be statically or
+dynamically linked.  This is the default code model.
 
 @item -mcmodel=large
 @opindex mcmodel=large
 Generate code for the large code model.  This makes no assumptions about
-addresses and sizes of sections.  Pointers are 64 bits.  Programs can be
-statically linked only.
+addresses and sizes of sections.  Programs can be statically linked only.
 
 @item -mstrict-align
 @opindex mstrict-align
-Do not assume that unaligned memory references are handled by the system.
+Avoid generating memory accesses that may not be aligned on a natural object
+boundary as described in the architecture specification.
 
 @item -momit-leaf-frame-pointer
 @itemx -mno-omit-leaf-frame-pointer
@@ -12900,7 +12907,7 @@ of TLS variables.
 @item -mtls-size=@var{size}
 @opindex mtls-size
 Specify bit size of immediate TLS offsets.  Valid values are 12, 24, 32, 48.
-This option depends on binutils higher than 2.25.
+This option requires binutils 2.26 or newer.
 
 @item -mfix-cortex-a53-835769
 @itemx -mno-fix-cortex-a53-835769
@@ -12920,12 +12927,34 @@ corresponding flag to the linker.
 
 @item -mlow-precision-recip-sqrt
 @item -mno-low-precision-recip-sqrt
-@opindex -mlow-precision-recip-sqrt
-@opindex -mno-low-precision-recip-sqrt
-When calculating the reciprocal square root approximation,
-uses one less step than otherwise, thus reducing latency and precision.
-This is only relevant if @option{-ffast-math} enables the reciprocal square root
-approximation, which in turn depends on the target processor.
+@opindex mlow-precision-recip-sqrt
+@opindex mno-low-precision-recip-sqrt
+Enable or disable the reciprocal square root approximation.
+This option only has an effect if @option{-ffast-math} or
+@option{-funsafe-math-optimizations} is used as well.  Enabling this reduces
+precision of reciprocal square root results to about 16 bits for
+single precision and to 32 bits for double precision.
+
+@item -mlow-precision-sqrt
+@item -mno-low-precision-sqrt
+@opindex -mlow-precision-sqrt
+@opindex -mno-low-precision-sqrt
+Enable or disable the square root approximation.
+This option only has an effect if @option{-ffast-math} or
+@option{-funsafe-math-optimizations} is used as well.  Enabling this reduces
+precision of square root results to about 16 bits for
+single precision and to 32 bits for double precision.
+If enabled, it implies @option{-mlow-precision-recip-sqrt}.
+
+@item -mlow-precision-div
+@item -mno-low-precision-div
+@opindex -mlow-precision-div
+@opindex -mno-low-precision-div
+Enable or disable the division approximation.
+This option only has an effect if @option{-ffast-math} or
+@option{-funsafe-math-optimizations} is used as well.  Enabling this reduces
+precision of division results to about 16 bits for
+single precision and to 32 bits for double precision.
 
 @item -march=@var{name}
 @opindex march
@@ -12934,10 +12963,16 @@ more feature modifiers.  This option has the form
 @option{-march=@var{arch}@r{@{}+@r{[}no@r{]}@var{feature}@r{@}*}}.
 
 The permissible values for @var{arch} are @samp{armv8-a},
-@samp{armv8.1-a} or @var{native}.
+@samp{armv8.1-a}, @samp{armv8.2-a}, @samp{armv8.3-a} or @var{native}.
+
+The value @samp{armv8.3-a} implies @samp{armv8.2-a} and enables compiler
+support for the ARMv8.3-A architecture extensions.
+
+The value @samp{armv8.2-a} implies @samp{armv8.1-a} and enables compiler
+support for the ARMv8.2-A architecture extensions.
 
 The value @samp{armv8.1-a} implies @samp{armv8-a} and enables compiler
-support for the ARMv8.1 architecture extension.  In particular, it
+support for the ARMv8.1-A architecture extension.  In particular, it
 enables the @samp{+crc} and @samp{+lse} features.
 
 The value @samp{native} is available on native AArch64 GNU/Linux and
@@ -12961,18 +12996,18 @@ processors implementing the target architecture.
 Specify the name of the target processor for which GCC should tune the
 performance of the code.  Permissible values for this option are:
 @samp{generic}, @samp{cortex-a35}, @samp{cortex-a53}, @samp{cortex-a57},
-@samp{cortex-a72}, @samp{exynos-m1}, @samp{qdf24xx}, @samp{thunderx},
-@samp{xgene1}.
+@samp{cortex-a72}, @samp{cortex-a73}, @samp{exynos-m1}, @samp{qdf24xx},
+@samp{thunderx}, @samp{xgene1}, @samp{vulcan}, @samp{cortex-a57.cortex-a53},
+@samp{cortex-a72.cortex-a53}, @samp{cortex-a73.cortex-a35},
+@samp{cortex-a73.cortex-a53}, @samp{native}.
 
-Additionally, this option can specify that GCC should tune the performance
-of the code for a big.LITTLE system.  Permissible values for this
-option are: @samp{cortex-a57.cortex-a53}, @samp{cortex-a72.cortex-a53}.
+The values @samp{cortex-a57.cortex-a53}, @samp{cortex-a72.cortex-a53},
+@samp{cortex-a73.cortex-a35}, @samp{cortex-a73.cortex-a53}
+specify that GCC should tune for a big.LITTLE system.
 
 Additionally on native AArch64 GNU/Linux systems the value
-@samp{native} is available.  This option causes the compiler to pick
-the architecture of and tune the performance of the code for the
-processor of the host system.  This option has no effect if the
-compiler is unable to recognize the architecture of the host system.
+@samp{native} tunes performance to the host system.  This option has no effect
+if the compiler is unable to recognize the processor of the host system.
 
 Where none of @option{-mtune=}, @option{-mcpu=} or @option{-march=}
 are specified, the code is tuned to perform well across a range
@@ -12992,12 +13027,6 @@ documented in the sub-section on
 Feature Modifiers}.  Where conflicting feature modifiers are
 specified, the right-most feature is used.
 
-Additionally on native AArch64 GNU/Linux systems the value
-@samp{native} is available.  This option causes the compiler to tune
-the performance of the code for the processor of the host system.
-This option has no effect if the compiler is unable to recognize the
-architecture of the host system.
-
 GCC uses @var{name} to determine what kind of instructions it can emit when
 generating assembly code (as if by @option{-march}) and to determine
 the target processor for which to tune for performance (as if
@@ -13015,11 +13044,11 @@ across releases.
 This option is only intended to be useful when developing GCC.
 
 @item -mpc-relative-literal-loads
-@opindex mpcrelativeliteralloads
-Enable PC relative literal loads. If this option is used, literal
-pools are assumed to have a range of up to 1MiB and an appropriate
-instruction sequence is used. This option has no impact when used
-with @option{-mcmodel=tiny}.
+@opindex mpc-relative-literal-loads
+Enable PC-relative literal loads.  With this option literal pools are
+accessed using a single instruction and emitted after each function.  This
+limits the maximum size of functions to 1MB.  This is enabled by default for
+@option{-mcmodel=tiny}.
 
 @end table
 
@@ -13047,12 +13076,14 @@ instructions.  This is on by default for all possible values for options
 @item lse
 Enable Large System Extension instructions.  This is on by default for
 @option{-march=armv8.1-a}.
+@item fp16
+Enable FP16 extension.  This also enables floating-point instructions.
 
 @end table
 
-That is, @option{crypto} implies @option{simd} implies @option{fp}.
-Conversely, @option{nofp} (or equivalently, @option{-mgeneral-regs-only})
-implies @option{nosimd} implies @option{nocrypto}.
+Feature @option{crypto} implies @option{simd}, which implies @option{fp}.
+Conversely, @option{nofp} implies @option{nosimd}, which implies
+@option{nocrypto}.
 
 @node Adapteva Epiphany Options
 @subsection Adapteva Epiphany Options
@@ -13902,16 +13933,6 @@ called, depending upon the amount of stack space required.  The runtime
 system is required to provide these functions.  The default is
 @option{-mno-apcs-stack-check}, since this produces smaller code.
 
-@c not currently implemented
-@item -mapcs-float
-@opindex mapcs-float
-Pass floating-point arguments using the floating-point registers.  This is
-one of the variants of the APCS@.  This option is recommended if the
-target hardware has a floating-point unit or if a lot of floating-point
-arithmetic is going to be performed by the code.  The default is
-@option{-mno-apcs-float}, since the size of integer-only code is 
-slightly increased if @option{-mapcs-float} is used.
-
 @c not currently implemented
 @item -mapcs-reentrant
 @opindex mapcs-reentrant
@@ -13972,21 +13993,42 @@ name to determine what kind of instructions it can emit when generating
 assembly code.  This option can be used in conjunction with or instead
 of the @option{-mcpu=} option.  Permissible names are: @samp{armv2},
 @samp{armv2a}, @samp{armv3}, @samp{armv3m}, @samp{armv4}, @samp{armv4t},
-@samp{armv5}, @samp{armv5t}, @samp{armv5e}, @samp{armv5te},
-@samp{armv6}, @samp{armv6j},
-@samp{armv6t2}, @samp{armv6z}, @samp{armv6kz}, @samp{armv6-m},
-@samp{armv7}, @samp{armv7-a}, @samp{armv7-r}, @samp{armv7-m}, @samp{armv7e-m},
+@samp{armv5}, @samp{armv5e}, @samp{armv5t}, @samp{armv5te},
+@samp{armv6}, @samp{armv6-m}, @samp{armv6j}, @samp{armv6k},
+@samp{armv6kz}, @samp{armv6s-m},
+@samp{armv6t2}, @samp{armv6z}, @samp{armv6zk},
+@samp{armv7}, @samp{armv7-a}, @samp{armv7-m}, @samp{armv7-r}, @samp{armv7e-m},
 @samp{armv7ve}, @samp{armv8-a}, @samp{armv8-a+crc}, @samp{armv8.1-a},
-@samp{armv8.1-a+crc}, @samp{iwmmxt}, @samp{iwmmxt2}, @samp{ep9312}.
+@samp{armv8.1-a+crc}, @samp{armv8-m.base}, @samp{armv8-m.main},
+@samp{armv8-m.main+dsp}, @samp{iwmmxt}, @samp{iwmmxt2}.
 
-Architecture revisions older than @option{armv4t} are deprecated.
+Architecture revisions older than @samp{armv4t} are deprecated.
 
-@option{-march=armv7ve} is the armv7-a architecture with virtualization
+@option{-march=armv6s-m} is the @samp{armv6-m} architecture with support for
+the (now mandatory) SVC instruction.
+
+@option{-march=armv6zk} is an alias for @samp{armv6kz}, existing for backwards
+compatibility.
+
+@option{-march=armv7ve} is the @samp{armv7-a} architecture with virtualization
 extensions.
 
 @option{-march=armv8-a+crc} enables code generation for the ARMv8-A
 architecture together with the optional CRC32 extensions.
 
+@option{-march=armv8.1-a} enables compiler support for the ARMv8.1-A
+architecture.  This also enables the features provided by
+@option{-march=armv8-a+crc}.
+
+@option{-march=armv8.2-a} enables compiler support for the ARMv8.2-A
+architecture.  This also enables the features provided by
+@option{-march=armv8.1-a}.
+
+@option{-march=armv8.2-a+fp16} enables compiler support for the
+ARMv8.2-A architecture with the optional FP16 instructions extension.
+This also enables the features provided by @option{-march=armv8.1-a}
+and implies @option{-mfp16-format=ieee}.
+
 @option{-march=native} causes the compiler to auto-detect the architecture
 of the build computer.  At present, this feature is only supported on
 GNU/Linux, and not all architectures are recognized.  If the auto-detect
@@ -14018,8 +14060,10 @@ Permissible names are: @samp{arm2}, @samp{arm250},
 @samp{generic-armv7-a}, @samp{cortex-a5}, @samp{cortex-a7}, @samp{cortex-a8},
 @samp{cortex-a9}, @samp{cortex-a12}, @samp{cortex-a15}, @samp{cortex-a17},
 @samp{cortex-a32}, @samp{cortex-a35}, @samp{cortex-a53}, @samp{cortex-a57},
-@samp{cortex-a72}, @samp{cortex-r4},
+@samp{cortex-a72}, @samp{cortex-a73}, @samp{cortex-r4},
 @samp{cortex-r4f}, @samp{cortex-r5}, @samp{cortex-r7}, @samp{cortex-r8},
+@samp{cortex-m33},
+@samp{cortex-m23},
 @samp{cortex-m7},
 @samp{cortex-m4},
 @samp{cortex-m3},
@@ -14040,7 +14084,8 @@ Permissible names are: @samp{arm2}, @samp{arm250},
 Additionally, this option can specify that GCC should tune the performance
 of the code for a big.LITTLE system.  Permissible names are:
 @samp{cortex-a15.cortex-a7}, @samp{cortex-a17.cortex-a7},
-@samp{cortex-a57.cortex-a53}, @samp{cortex-a72.cortex-a53}.
+@samp{cortex-a57.cortex-a53}, @samp{cortex-a72.cortex-a53},
+@samp{cortex-a72.cortex-a35}, @samp{cortex-a73.cortex-a53}.
 
 @option{-mtune=generic-@var{arch}} specifies that GCC should tune the
 performance for a blend of processors within architecture @var{arch}.
@@ -14078,12 +14123,14 @@ is unsuccessful the option has no effect.
 @item -mfpu=@var{name}
 @opindex mfpu
 This specifies what floating-point hardware (or hardware emulation) is
-available on the target.  Permissible names are: @samp{vfp}, @samp{vfpv3},
+available on the target.  Permissible names are: @samp{vfpv2}, @samp{vfpv3},
 @samp{vfpv3-fp16}, @samp{vfpv3-d16}, @samp{vfpv3-d16-fp16}, @samp{vfpv3xd},
-@samp{vfpv3xd-fp16}, @samp{neon}, @samp{neon-fp16}, @samp{vfpv4},
+@samp{vfpv3xd-fp16}, @samp{neon-vfpv3}, @samp{neon-fp16}, @samp{vfpv4},
 @samp{vfpv4-d16}, @samp{fpv4-sp-d16}, @samp{neon-vfpv4},
 @samp{fpv5-d16}, @samp{fpv5-sp-d16},
 @samp{fp-armv8}, @samp{neon-fp-armv8} and @samp{crypto-neon-fp-armv8}.
+Note that @samp{neon} is an alias for @samp{neon-vfpv3} and @samp{vfp}
+is an alias for @samp{vfpv2}.
 
 If @option{-msoft-float} is specified this specifies the format of
 floating-point values.
@@ -14170,9 +14217,12 @@ otherwise the default is @samp{R10}.
 
 @item -mpic-data-is-text-relative
 @opindex mpic-data-is-text-relative
-Assume that each data segments are relative to text segment at load time.
-Therefore, it permits addressing data using PC-relative operations.
-This option is on by default for targets other than VxWorks RTP.
+Assume that the displacement between the text and data segments is fixed
+at static link time.  This permits using PC-relative addressing
+operations to access data known to be in the data segment.  For
+non-VxWorks RTP targets, this option is enabled by default.  When
+disabled on such targets, it will enable @option{-msingle-pic-base} by
+default.
 
 @item -mpoke-function-name
 @opindex mpoke-function-name
@@ -14282,10 +14332,10 @@ generating these instructions.  This option is enabled by default when
 @opindex mno-unaligned-access
 Enables (or disables) reading and writing of 16- and 32- bit values
 from addresses that are not 16- or 32- bit aligned.  By default
-unaligned access is disabled for all pre-ARMv6 and all ARMv6-M
-architectures, and enabled for all other architectures.  If unaligned
-access is not enabled then words in packed data structures are
-accessed a byte at a time.
+unaligned access is disabled for all pre-ARMv6, all ARMv6-M and for
+ARMv8-M Baseline architectures, and enabled for all other
+architectures.  If unaligned access is not enabled then words in packed
+data structures are accessed a byte at a time.
 
 The ARM attribute @code{Tag_CPU_unaligned_access} is set in the
 generated object file to either true or false, depending upon the
@@ -14325,6 +14375,20 @@ Print CPU tuning information as comment in assembler file.  This is
 an option used only for regression testing of the compiler and not
 intended for ordinary use in compiling code.  This option is disabled
 by default.
+
+@item -mpure-code
+@opindex mpure-code
+Do not allow constant data to be placed in code sections.
+Additionally, when compiling for ELF object format give all text sections the
+ELF processor-specific section attribute @code{SHF_ARM_PURECODE}.  This option
+is only available when generating non-pic code for M-profile targets with the
+MOVT instruction.
+
+@item -mcmse
+@opindex mcmse
+Generate secure code as per the "ARMv8-M Security Extensions: Requirements on
+Development Tools Engineering Specification", which can be found on
+@url{http://infocenter.arm.com/help/topic/com.arm.doc.ecm0359818/ECM0359818_armv8m_security_extensions_reqs_on_dev_tools_1_0.pdf}.
 @end table
 
 @node AVR Options
@@ -18092,7 +18156,7 @@ IEEE 754 floating-point data.
 
 The @option{-mnan=legacy} option selects the legacy encoding.  In this
 case quiet NaNs (qNaNs) are denoted by the first bit of their trailing
-significand field being 0, whereas signalling NaNs (sNaNs) are denoted
+significand field being 0, whereas signaling NaNs (sNaNs) are denoted
 by the first bit of their trailing significand field being 1.
 
 The @option{-mnan=2008} option selects the IEEE 754-2008 encoding.  In
--- a/src/gcc/doc/md.texi
+++ b/src/gcc/doc/md.texi
@@ -5030,7 +5030,7 @@ it is unspecified which of the two operands is returned as the result.
 IEEE-conformant minimum and maximum operations.  If one operand is a quiet
 @code{NaN}, then the other operand is returned.  If both operands are quiet
 @code{NaN}, then a quiet @code{NaN} is returned.  In the case when gcc supports
-signalling @code{NaN} (-fsignaling-nans) an invalid floating point exception is
+signaling @code{NaN} (-fsignaling-nans) an invalid floating point exception is
 raised and a quiet @code{NaN} is returned.
 
 All operands have mode @var{m}, which is a scalar or vector
--- a/src/gcc/doc/sourcebuild.texi
+++ b/src/gcc/doc/sourcebuild.texi
@@ -1555,6 +1555,16 @@ options.  Some multilibs may be incompatible with these options.
 ARM Target supports @code{-mfpu=neon-vfpv4 -mfloat-abi=softfp} or compatible
 options.  Some multilibs may be incompatible with these options.
 
+@item arm_fp16_ok
+@anchor{arm_fp16_ok}
+Target supports options to generate VFP half-precision floating-point
+instructions.  Some multilibs may be incompatible with these
+options.  This test is valid for ARM only.
+
+@item arm_fp16_hw
+Target supports executing VFP half-precision floating-point
+instructions.  This test is valid for ARM only.
+
 @item arm_neon_fp16_ok
 @anchor{arm_neon_fp16_ok}
 ARM Target supports @code{-mfpu=neon-fp16 -mfloat-abi=softfp} or compatible
@@ -1565,6 +1575,13 @@ options, including @code{-mfp16-format=ieee} if necessary to obtain the
 Test system supports executing Neon half-precision float instructions.
 (Implies previous.)
 
+@item arm_fp16_alternative_ok
+ARM target supports the ARM FP16 alternative format.  Some multilibs
+may be incompatible with the options needed.
+
+@item arm_fp16_none_ok
+ARM target supports specifying none as the ARM FP16 format.
+
 @item arm_thumb1_ok
 ARM target generates Thumb-1 code for @code{-mthumb}.
 
@@ -1589,6 +1606,7 @@ ARM target supports @code{-mfpu=neon-fp-armv8 -mfloat-abi=softfp}.
 Some multilibs may be incompatible with these options.
 
 @item arm_v8_1a_neon_ok
+@anchor{arm_v8_1a_neon_ok}
 ARM target supports options to generate ARMv8.1 Adv.SIMD instructions.
 Some multilibs may be incompatible with these options.
 
@@ -1597,10 +1615,47 @@ ARM target supports executing ARMv8.1 Adv.SIMD instructions.  Some
 multilibs may be incompatible with the options needed.  Implies
 arm_v8_1a_neon_ok.
 
+@item arm_acq_rel
+ARM target supports acquire-release instructions.
+
+@item arm_v8_2a_fp16_scalar_ok
+@anchor{arm_v8_2a_fp16_scalar_ok}
+ARM target supports options to generate instructions for ARMv8.2 and
+scalar instructions from the FP16 extension.  Some multilibs may be
+incompatible with these options.
+
+@item arm_v8_2a_fp16_scalar_hw
+ARM target supports executing instructions for ARMv8.2 and scalar
+instructions from the FP16 extension.  Some multilibs may be
+incompatible with these options.  Implies arm_v8_2a_fp16_neon_ok.
+
+@item arm_v8_2a_fp16_neon_ok
+@anchor{arm_v8_2a_fp16_neon_ok}
+ARM target supports options to generate instructions from ARMv8.2 with
+the FP16 extension.  Some multilibs may be incompatible with these
+options.  Implies arm_v8_2a_fp16_scalar_ok.
+
+@item arm_v8_2a_fp16_neon_hw
+ARM target supports executing instructions from ARMv8.2 with the FP16
+extension.  Some multilibs may be incompatible with these options.
+Implies arm_v8_2a_fp16_neon_ok and arm_v8_2a_fp16_scalar_hw.
+
 @item arm_prefer_ldrd_strd
 ARM target prefers @code{LDRD} and @code{STRD} instructions over
 @code{LDM} and @code{STM} instructions.
 
+@item arm_thumb1_movt_ok
+ARM target generates Thumb-1 code for @code{-mthumb} with @code{MOVW}
+and @code{MOVT} instructions available.
+
+@item arm_thumb1_cbz_ok
+ARM target generates Thumb-1 code for @code{-mthumb} with
+@code{CBZ} and @code{CBNZ} instructions available.
+
+@item arm_cmse_ok
+ARM target supports ARMv8-M Security Extensions, enabled by the @code{-mcmse}
+option.
+
 @end table
 
 @subsubsection AArch64-specific attributes
@@ -2069,6 +2124,28 @@ NEON support.  Only ARM targets support this feature, and only then
 in certain modes; see the @ref{arm_neon_ok,,arm_neon_ok effective target
 keyword}.
 
+@item arm_fp16
+VFP half-precision floating point support.  This does not select the
+FP16 format; for that, use @ref{arm_fp16_ieee,,arm_fp16_ieee} or
+@ref{arm_fp16_alternative,,arm_fp16_alternative} instead.  This
+feature is only supported by ARM targets and then only in certain
+modes; see the @ref{arm_fp16_ok,,arm_fp16_ok effective target
+keyword}.
+
+@item arm_fp16_ieee
+@anchor{arm_fp16_ieee}
+ARM IEEE 754-2008 format VFP half-precision floating point support.
+This feature is only supported by ARM targets and then only in certain
+modes; see the @ref{arm_fp16_ok,,arm_fp16_ok effective target
+keyword}.
+
+@item arm_fp16_alternative
+@anchor{arm_fp16_alternative}
+ARM Alternative format VFP half-precision floating point support.
+This feature is only supported by ARM targets and then only in certain
+modes; see the @ref{arm_fp16_ok,,arm_fp16_ok effective target
+keyword}.
+
 @item arm_neon_fp16
 NEON and half-precision floating point support.  Only ARM targets
 support this feature, and only then in certain modes; see
@@ -2078,6 +2155,23 @@ the @ref{arm_neon_fp16_ok,,arm_neon_fp16_ok effective target keyword}.
 arm vfp3 floating point support; see
 the @ref{arm_vfp3_ok,,arm_vfp3_ok effective target keyword}.
 
+@item arm_v8_1a_neon
+Add options for ARMv8.1 with Adv.SIMD support, if this is supported
+by the target; see the @ref{arm_v8_1a_neon_ok,,arm_v8_1a_neon_ok}
+effective target keyword.
+
+@item arm_v8_2a_fp16_scalar
+Add options for ARMv8.2 with scalar FP16 support, if this is
+supported by the target; see the
+@ref{arm_v8_2a_fp16_scalar_ok,,arm_v8_2a_fp16_scalar_ok} effective
+target keyword.
+
+@item arm_v8_2a_fp16_neon
+Add options for ARMv8.2 with Adv.SIMD FP16 support, if this is
+supported by the target; see the
+@ref{arm_v8_2a_fp16_neon_ok,,arm_v8_2a_fp16_neon_ok} effective target
+keyword.
+
 @item bind_pic_locally
 Add the target-specific flags needed to enable functions to bind
 locally when using pic/PIC passes in the testsuite.
@@ -2111,6 +2205,11 @@ the codeset to convert to.
 Skip the test if the target does not support profiling with option
 @var{profopt}.
 
+@item dg-require-stack-check @var{check}
+Skip the test if the target does not support the @code{-fstack-check}
+option.  If @var{check} is @code{""}, support for @code{-fstack-check}
+is checked, for @code{-fstack-check=("@var{check}")} otherwise.
+
 @item dg-require-visibility @var{vis}
 Skip the test if the target does not support the @code{visibility} attribute.
 If @var{vis} is @code{""}, support for @code{visibility("hidden")} is
--- a/src/gcc/doc/tm.texi
+++ b/src/gcc/doc/tm.texi
@@ -7510,6 +7510,18 @@ is non-NULL, it is the @code{VAR_DECL} or @code{FUNCTION_DECL} with which
 this section is associated.
 @end deftypefn
 
+@deftypefn {Target Hook} bool TARGET_ASM_ELF_FLAGS_NUMERIC (unsigned int @var{flags}, unsigned int *@var{num})
+This hook can be used to encode ELF section flags for which no letter
+code has been defined in the assembler.  It is called by
+@code{default_asm_named_section} whenever the section flags need to be
+emitted in the assembler output.  If the hook returns true, then the
+numerical value for ELF section flags should be calculated from
+@var{flags} and saved in @var{*num}; the value is printed out instead of the
+normal sequence of letter codes.  If the hook is not defined, or if it
+returns false, then @var{num} is ignored and the traditional letter sequence
+is emitted.
+@end deftypefn
+
 @deftypefn {Target Hook} {section *} TARGET_ASM_FUNCTION_SECTION (tree @var{decl}, enum node_frequency @var{freq}, bool @var{startup}, bool @var{exit})
 Return preferred text (sub)section for function @var{decl}.
 Main purpose of this function is to separate cold, normal and hot
--- a/src/gcc/doc/tm.texi.in
+++ b/src/gcc/doc/tm.texi.in
@@ -5209,6 +5209,8 @@ of the filename using this macro.
 
 @hook TARGET_ASM_NAMED_SECTION
 
+@hook TARGET_ASM_ELF_FLAGS_NUMERIC
+
 @hook TARGET_ASM_FUNCTION_SECTION
 
 @hook TARGET_ASM_FUNCTION_SWITCHED_TEXT_SECTIONS