diff options
Diffstat (limited to 'gcc/doc/invoke.texi')
| -rw-r--r-- | gcc/doc/invoke.texi | 135 |
1 files changed, 87 insertions, 48 deletions
diff --git a/gcc/doc/invoke.texi b/gcc/doc/invoke.texi index 89d9b69bba6..ca059df9445 100644 --- a/gcc/doc/invoke.texi +++ b/gcc/doc/invoke.texi @@ -577,7 +577,7 @@ Objective-C and Objective-C++ Dialects}. -mno-wide-multiply -mrtd -malign-double @gol -mpreferred-stack-boundary=@var{num} -mincoming-stack-boundary=@var{num} --mcld -mcx16 -msahf -mrecip @gol +-mcld -mcx16 -msahf -mmovbe -mrecip @gol -mmmx -msse -msse2 -msse3 -mssse3 -msse4.1 -msse4.2 -msse4 -mavx @gol -maes -mpclmul @gol -msse4a -m3dnow -mpopcnt -mabm -msse5 @gol @@ -593,21 +593,26 @@ Objective-C and Objective-C++ Dialects}. @emph{IA-64 Options} @gccoptlist{-mbig-endian -mlittle-endian -mgnu-as -mgnu-ld -mno-pic @gol --mvolatile-asm-stop -mregister-names -mno-sdata @gol --mconstant-gp -mauto-pic -minline-float-divide-min-latency @gol +-mvolatile-asm-stop -mregister-names -msdata -mno-sdata @gol +-mconstant-gp -mauto-pic -mfused-madd @gol +-minline-float-divide-min-latency @gol -minline-float-divide-max-throughput @gol +-mno-inline-float-divide @gol -minline-int-divide-min-latency @gol -minline-int-divide-max-throughput @gol +-mno-inline-int-divide @gol -minline-sqrt-min-latency -minline-sqrt-max-throughput @gol --mno-dwarf2-asm -mearly-stop-bits @gol +-mno-inline-sqrt @gol +-mdwarf2-asm -mearly-stop-bits @gol -mfixed-range=@var{register-range} -mtls-size=@var{tls-size} @gol --mtune=@var{cpu-type} -mt -pthread -milp32 -mlp64 @gol --mno-sched-br-data-spec -msched-ar-data-spec -mno-sched-control-spec @gol +-mtune=@var{cpu-type} -milp32 -mlp64 @gol +-msched-br-data-spec -msched-ar-data-spec -msched-control-spec @gol -msched-br-in-data-spec -msched-ar-in-data-spec -msched-in-control-spec @gol --msched-ldc -mno-sched-control-ldc -mno-sched-spec-verbose @gol --mno-sched-prefer-non-data-spec-insns @gol --mno-sched-prefer-non-control-spec-insns @gol --mno-sched-count-spec-in-critical-path} +-msched-spec-ldc -msched-spec-control-ldc @gol +-msched-prefer-non-data-spec-insns -msched-prefer-non-control-spec-insns @gol +-msched-stop-bits-after-every-cycle -msched-count-spec-in-critical-path @gol +-msel-sched-dont-check-control-spec -msched-fp-mem-deps-zero-cost @gol +-msched-max-memory-insns-hard-limit -msched-max-memory-insns=@var{max-insns}} @emph{M32R/D Options} @gccoptlist{-m32r2 -m32rx -m32r @gol @@ -1594,7 +1599,7 @@ freestanding and hosted environments. Enable handling of OpenMP directives @code{#pragma omp} in C/C++ and @code{!$omp} in Fortran. When @option{-fopenmp} is specified, the compiler generates parallel code according to the OpenMP Application -Program Interface v2.5 @w{@uref{http://www.openmp.org/}}. This option +Program Interface v3.0 @w{@uref{http://www.openmp.org/}}. This option implies @option{-pthread}, and thus is only supported on targets that have support for @option{-pthread}. @@ -2806,7 +2811,6 @@ name is still supported, but the newer name is more descriptive.) @gccoptlist{-Wclobbered @gol -Wempty-body @gol -Wignored-qualifiers @gol --Wlogical-op @gol -Wmissing-field-initializers @gol -Wmissing-parameter-type @r{(C only)} @gol -Wold-style-declaration @r{(C only)} @gol @@ -3793,8 +3797,7 @@ programmer intended to use @code{strcmp}. This warning is enabled by @opindex Wno-logical-op Warn about suspicious uses of logical operators in expressions. This includes using logical operators in contexts where a -bit-wise operator is likely to be expected. This warning is enabled by -@option{-Wextra}. +bit-wise operator is likely to be expected. @item -Waggregate-return @opindex Waggregate-return @@ -11460,6 +11463,11 @@ SAHF are load and store instructions, respectively, for certain status flags. In 64-bit mode, SAHF instruction is used to optimize @code{fmod}, @code{drem} or @code{remainder} built-in functions: see @ref{Other Builtins} for details. +@item -mmovbe +@opindex mmovbe +This option will enable GCC to use movbe instruction to implement +@code{__builtin_bswap32} and @code{__builtin_bswap64}. + @item -mrecip @opindex mrecip This option will enable GCC to use RCPSS and RSQRTSS instructions (and their @@ -11720,6 +11728,10 @@ using the minimum latency algorithm. Generate code for inline divides of floating point values using the maximum throughput algorithm. +@item -mno-inline-float-divide +@opindex mno-inline-float-divide +Do not generate inline code for divides of floating point values. + @item -minline-int-divide-min-latency @opindex minline-int-divide-min-latency Generate code for inline divides of integer values @@ -11730,6 +11742,10 @@ using the minimum latency algorithm. Generate code for inline divides of integer values using the maximum throughput algorithm. +@item -mno-inline-float-divide +@opindex mno-inline-float-divide +Do not generate inline code for divides of integer values. + @item -minline-sqrt-min-latency @opindex minline-sqrt-min-latency Generate code for inline square roots @@ -11740,6 +11756,17 @@ using the minimum latency algorithm. Generate code for inline square roots using the maximum throughput algorithm. +@item -mno-inline-sqrt +@opindex mno-inline-sqrt +Do not generate inline code for sqrt. + +@item -mfused-madd +@itemx -mno-fused-madd +@opindex mfused-madd +@opindex mno-fused-madd +Do (don't) generate code that uses the fused multiply/add or multiply/subtract +instructions. The default is to use these instructions. + @item -mno-dwarf2-asm @itemx -mdwarf2-asm @opindex mno-dwarf2-asm @@ -11773,15 +11800,6 @@ Specify bit size of immediate TLS offsets. Valid values are 14, 22, and Tune the instruction scheduling for a particular CPU, Valid values are itanium, itanium1, merced, itanium2, and mckinley. -@item -mt -@itemx -pthread -@opindex mt -@opindex pthread -Add support for multithreading using the POSIX threads library. This -option sets flags for both the preprocessor and linker. It does -not affect the thread safety of object code produced by the compiler or -that of libraries supplied with it. These are HP-UX specific flags. - @item -milp32 @itemx -mlp64 @opindex milp32 @@ -11846,31 +11864,6 @@ are dependent on the control speculative loads. This is effective only with @option{-msched-control-spec} enabled. The default is 'enable'. -@item -msched-ldc -@itemx -mno-sched-ldc -@opindex msched-ldc -@opindex mno-sched-ldc -(En/Dis)able use of simple data speculation checks ld.c . -If disabled, only chk.a instructions will be emitted to check -data speculative loads. -The default is 'enable'. - -@item -mno-sched-control-ldc -@itemx -msched-control-ldc -@opindex mno-sched-control-ldc -@opindex msched-control-ldc -(Dis/En)able use of ld.c instructions to check control speculative loads. -If enabled, in case of control speculative load with no speculatively -scheduled dependent instructions this load will be emitted as ld.sa and -ld.c will be used to check it. -The default is 'disable'. - -@item -mno-sched-spec-verbose -@itemx -msched-spec-verbose -@opindex mno-sched-spec-verbose -@opindex msched-spec-verbose -(Dis/En)able printing of the information about speculative motions. - @item -mno-sched-prefer-non-data-spec-insns @itemx -msched-prefer-non-data-spec-insns @opindex mno-sched-prefer-non-data-spec-insns @@ -11898,6 +11891,43 @@ computation of the instructions priorities. This will make the use of the speculation a bit more conservative. The default is 'disable'. +@item -msched-spec-ldc +@opindex msched-spec-ldc +Use a simple data speculation check. This option is on by default. + +@item -msched-control-spec-ldc +@opindex msched-spec-ldc +Use a simple check for control speculation. This option is on by default. + +@item -msched-stop-bits-after-every-cycle +@opindex msched-stop-bits-after-every-cycle +Place a stop bit after every cycle when scheduling. This option is on +by default. + +@item -msched-fp-mem-deps-zero-cost +@opindex msched-fp-mem-deps-zero-cost +Assume that floating-point stores and loads are not likely to cause a conflict +when placed into the same instruction group. This option is disabled by +default. + +@item -msel-sched-dont-check-control-spec +@opindex msel-sched-dont-check-control-spec +Generate checks for control speculation in selective scheduling. +This flag is disabled by default. + +@item -msched-max-memory-insns=@var{max-insns} +@opindex msched-max-memory-insns +Limit on the number of memory insns per instruction group, giving lower +priority to subsequent memory insns attempting to schedule in the same +instruction group. Frequently useful to prevent cache bank conflicts. +The default value is 1. + +@item -msched-max-memory-insns-hard-limit +@opindex msched-max-memory-insns-hard-limit +Disallow more than `msched-max-memory-insns' in instruction group. +Otherwise, limit is `soft' meaning that we would prefer non-memory operations +when limit is reached but may still schedule memory operations. + @end table @node M32C Options @@ -15675,6 +15705,15 @@ This option is available for Cygwin and MinGW targets. It specifies that a GUI application is to be generated by instructing the linker to set the PE header subsystem type appropriately. + +@item -mpe-aligned-commons +@opindex mpe-aligned-commons +This option is available for Cygwin and MinGW targets. It +specifies that the GNU extension to the PE file format that +permits the correct alignment of COMMON variables should be +used when generating code. It will be enabled by default if +GCC detects that the target assembler found during configuration +supports the feature. @end table See also under @ref{i386 and x86-64 Options} for standard options. |