компилятор C и C ++ проекта GNU (GNU project C and C++ compiler)
Параметры подробно (Options detail)
IA-64
These are the -m options defined for the Intel IA-64
architecture.
-mbig-endian
Generate code for a big-endian target. This is the default
for HP-UX.
-mlittle-endian
Generate code for a little-endian target. This is the
default for AIX5 and GNU/Linux.
-mgnu-as
-mno-gnu-as
Generate (or don't) code for the GNU assembler. This is the
default.
-mgnu-ld
-mno-gnu-ld
Generate (or don't) code for the GNU linker. This is the
default.
-mno-pic
Generate code that does not use a global pointer register.
The result is not position independent code, and violates the
IA-64 ABI.
-mvolatile-asm-stop
-mno-volatile-asm-stop
Generate (or don't) a stop bit immediately before and after
volatile asm statements.
-mregister-names
-mno-register-names
Generate (or don't) in, loc, and out register names for the
stacked registers. This may make assembler output more
readable.
-mno-sdata
-msdata
Disable (or enable) optimizations that use the small data
section. This may be useful for working around optimizer
bugs.
-mconstant-gp
Generate code that uses a single constant global pointer
value. This is useful when compiling kernel code.
-mauto-pic
Generate code that is self-relocatable. This implies
-mconstant-gp. This is useful when compiling firmware code.
-minline-float-divide-min-latency
Generate code for inline divides of floating-point values
using the minimum latency algorithm.
-minline-float-divide-max-throughput
Generate code for inline divides of floating-point values
using the maximum throughput algorithm.
-mno-inline-float-divide
Do not generate inline code for divides of floating-point
values.
-minline-int-divide-min-latency
Generate code for inline divides of integer values using the
minimum latency algorithm.
-minline-int-divide-max-throughput
Generate code for inline divides of integer values using the
maximum throughput algorithm.
-mno-inline-int-divide
Do not generate inline code for divides of integer values.
-minline-sqrt-min-latency
Generate code for inline square roots using the minimum
latency algorithm.
-minline-sqrt-max-throughput
Generate code for inline square roots using the maximum
throughput algorithm.
-mno-inline-sqrt
Do not generate inline code for "sqrt".
-mfused-madd
-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.
-mno-dwarf2-asm
-mdwarf2-asm
Don't (or do) generate assembler code for the DWARF line
number debugging info. This may be useful when not using the
GNU assembler.
-mearly-stop-bits
-mno-early-stop-bits
Allow stop bits to be placed earlier than immediately
preceding the instruction that triggered the stop bit. This
can improve instruction scheduling, but does not always do
so.
-mfixed-range=register-range
Generate code treating the given register range as fixed
registers. A fixed register is one that the register
allocator cannot use. This is useful when compiling kernel
code. A register range is specified as two registers
separated by a dash. Multiple register ranges can be
specified separated by a comma.
-mtls-size=tls-size
Specify bit size of immediate TLS offsets. Valid values are
14, 22, and 64.
-mtune=cpu-type
Tune the instruction scheduling for a particular CPU, Valid
values are itanium, itanium1, merced, itanium2, and mckinley.
-milp32
-mlp64
Generate code for a 32-bit or 64-bit environment. The 32-bit
environment sets int, long and pointer to 32 bits. The
64-bit environment sets int to 32 bits and long and pointer
to 64 bits. These are HP-UX specific flags.
-mno-sched-br-data-spec
-msched-br-data-spec
(Dis/En)able data speculative scheduling before reload. This
results in generation of "ld.a" instructions and the
corresponding check instructions ("ld.c" / "chk.a"). The
default setting is disabled.
-msched-ar-data-spec
-mno-sched-ar-data-spec
(En/Dis)able data speculative scheduling after reload. This
results in generation of "ld.a" instructions and the
corresponding check instructions ("ld.c" / "chk.a"). The
default setting is enabled.
-mno-sched-control-spec
-msched-control-spec
(Dis/En)able control speculative scheduling. This feature is
available only during region scheduling (i.e. before reload).
This results in generation of the "ld.s" instructions and the
corresponding check instructions "chk.s". The default
setting is disabled.
-msched-br-in-data-spec
-mno-sched-br-in-data-spec
(En/Dis)able speculative scheduling of the instructions that
are dependent on the data speculative loads before reload.
This is effective only with -msched-br-data-spec enabled.
The default setting is enabled.
-msched-ar-in-data-spec
-mno-sched-ar-in-data-spec
(En/Dis)able speculative scheduling of the instructions that
are dependent on the data speculative loads after reload.
This is effective only with -msched-ar-data-spec enabled.
The default setting is enabled.
-msched-in-control-spec
-mno-sched-in-control-spec
(En/Dis)able speculative scheduling of the instructions that
are dependent on the control speculative loads. This is
effective only with -msched-control-spec enabled. The
default setting is enabled.
-mno-sched-prefer-non-data-spec-insns
-msched-prefer-non-data-spec-insns
If enabled, data-speculative instructions are chosen for
schedule only if there are no other choices at the moment.
This makes the use of the data speculation much more
conservative. The default setting is disabled.
-mno-sched-prefer-non-control-spec-insns
-msched-prefer-non-control-spec-insns
If enabled, control-speculative instructions are chosen for
schedule only if there are no other choices at the moment.
This makes the use of the control speculation much more
conservative. The default setting is disabled.
-mno-sched-count-spec-in-critical-path
-msched-count-spec-in-critical-path
If enabled, speculative dependencies are considered during
computation of the instructions priorities. This makes the
use of the speculation a bit more conservative. The default
setting is disabled.
-msched-spec-ldc
Use a simple data speculation check. This option is on by
default.
-msched-control-spec-ldc
Use a simple check for control speculation. This option is
on by default.
-msched-stop-bits-after-every-cycle
Place a stop bit after every cycle when scheduling. This
option is on by default.
-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.
-msel-sched-dont-check-control-spec
Generate checks for control speculation in selective
scheduling. This flag is disabled by default.
-msched-max-memory-insns=max-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.
-msched-max-memory-insns-hard-limit
Makes the limit specified by msched-max-memory-insns a hard
limit, disallowing more than that number in an instruction
group. Otherwise, the limit is "soft", meaning that non-
memory operations are preferred when the limit is reached,
but memory operations may still be scheduled.
