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3.21.38 PDP-11 Options ¶

These options are defined for the PDP-11:

-mfpu ¶

Use hardware FPP floating point. This is the default. (FIS floatingpoint on the PDP-11/40 is not supported.) Implies-m45.

-msoft-float ¶

Do not use hardware floating point.

-mac0 ¶

-mno-ac0

With-mac0, return floating-point results in ac0(fr0 in Unix assembler syntax). The default,-mno-ac0, isto return floating-point results in memory.

-m40 ¶

Generate code for a PDP-11/40.Implies-msoft-float-mno-split.

-m45 ¶

Generate code for a PDP-11/45. This is the default.

-m10 ¶

Generate code for a PDP-11/10.Implies-msoft-float-mno-split.

-mint16 ¶

-mno-int32

Use 16-bitint. This is the default.

-mint32 ¶

-mno-int16

Use 32-bitint.

-msplit ¶

Target has split instruction and data space. Implies-m45.

-munix-asm ¶

Use Unix assembler syntax.

-mdec-asm ¶

Use DEC assembler syntax.

-mgnu-asm ¶

Use GNU assembler syntax. This is the default.

-mlra ¶

Use the new LRA register allocator. By default, the old “reload”allocator is used.

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