info gcc

3.17.5 CRIS Options

These options are defined specifically for the CRIS ports.

@gcctabopt -march=architecture-type
@gcctabopt -mcpu=architecture-type: Generate code for the specified architecture. The choices for architecture-type are ‘v3’, ‘v8’ and ‘v10’ for respectively ETRAX 4, ETRAX 100, and ETRAX 100 LX. Default is ‘v0’ except for cris-axis-linux-gnu, where the default is ‘v10’.
@gcctabopt -mtune=architecture-type: Tune to architecture-type everything applicable about the generated code, except for the ABI and the set of available instructions. The choices for architecture-type are the same as for ‘-march=architecture-type’.
@gcctabopt -mmax-stack-frame=n: Warn when the stack frame of a function exceeds n bytes.
@gcctabopt -melinux-stacksize=n: Only available with the ‘cris-axis-aout’ target. Arranges for indications in the program to the kernel loader that the stack of the program should be set to n bytes.
@gcctabopt -metrax4
@gcctabopt -metrax100: The options ‘-metrax4’ and ‘-metrax100’ are synonyms for ‘-march=v3’ and ‘-march=v8’ respectively.
@gcctabopt -mmul-bug-workaround
@gcctabopt -mno-mul-bug-workaround: Work around a bug in the muls and mulu instructions for CPU models where it applies. This option is active by default.
@gcctabopt -mpdebug: Enable CRIS-specific verbose debug-related information in the assembly code. This option also has the effect to turn off the ‘#NO_APP’ formatted-code indicator to the assembler at the beginning of the assembly file.
@gcctabopt -mcc-init: Do not use condition-code results from previous instruction; always emit compare and test instructions before use of condition codes.
@gcctabopt -mno-side-effects: Do not emit instructions with side-effects in addressing modes other than post-increment.
@gcctabopt -mstack-align
@gcctabopt -mno-stack-align
@gcctabopt -mdata-align
@gcctabopt -mno-data-align
@gcctabopt -mconst-align
@gcctabopt -mno-const-align: These options (no-options) arranges (eliminate arrangements) for the stack-frame, individual data and constants to be aligned for the maximum single data access size for the chosen CPU model. The default is to arrange for 32-bit alignment. ABI details such as structure layout are not affected by these options.
@gcctabopt -m32-bit
@gcctabopt -m16-bit
@gcctabopt -m8-bit: Similar to the stack- data- and const-align options above, these options arrange for stack-frame, writable data and constants to all be 32-bit, 16-bit or 8-bit aligned. The default is 32-bit alignment.
@gcctabopt -mno-prologue-epilogue
@gcctabopt -mprologue-epilogue: With ‘-mno-prologue-epilogue’, the normal function prologue and epilogue that sets up the stack-frame are omitted and no return instructions or return sequences are generated in the code. Use this option only together with visual inspection of the compiled code: no warnings or errors are generated when call-saved registers must be saved, or storage for local variable needs to be allocated.
@gcctabopt -mno-gotplt
@gcctabopt -mgotplt: With ‘-fpic’ and ‘-fPIC’, don't generate (do generate) instruction sequences that load addresses for functions from the PLT part of the GOT rather than (traditional on other architectures) calls to the PLT. The default is ‘-mgotplt’.
@gcctabopt -maout: Legacy no-op option only recognized with the cris-axis-aout target.
@gcctabopt -melf: Legacy no-op option only recognized with the cris-axis-elf and cris-axis-linux-gnu targets.
@gcctabopt -melinux: Only recognized with the cris-axis-aout target, where it selects a GNU/linux-like multilib, include files and instruction set for ‘-march=v8’.
@gcctabopt -mlinux: Legacy no-op option only recognized with the cris-axis-linux-gnu target.
@gcctabopt -sim: This option, recognized for the cris-axis-aout and cris-axis-elf arranges to link with input-output functions from a simulator library. Code, initialized data and zero-initialized data are allocated consecutively.
@gcctabopt -sim2: Like ‘-sim’, but pass linker options to locate initialized data at 0x40000000 and zero-initialized data at 0x80000000.

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