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Chapter 36. SuperH SH64 Dependent Features
36.1. Options
- -isa=sh4 | sh4a
Specify the sh4 or sh4a instruction set.
- -isa=dsp
Enable sh-dsp insns, and disable sh3e / sh4 insns.
- -isa=fp
Enable sh2e, sh3e, sh4, and sh4a insn sets.
- -isa=all
Enable sh1, sh2, sh2e, sh3, sh3e, sh4, sh4a, and sh-dsp insn sets.
- -isa=shmedia | -isa=shcompact
Specify the default instruction set. SHmedia specifies the
32-bit opcodes, and SHcompact specifies the 16-bit opcodes
compatible with previous SH families. The default depends on the ABI
selected; the default for the 64-bit ABI is SHmedia, and the default for
the 32-bit ABI is SHcompact. If neither the ABI nor the ISA is
specified, the default is 32-bit SHcompact.
Note that the .mode pseudo-op is not permitted if the ISA is not
specified on the command line.
- -abi=32 | -abi=64
Specify the default ABI. If the ISA is specified and the ABI is not,
the default ABI depends on the ISA, with SHmedia defaulting to 64-bit
and SHcompact defaulting to 32-bit.
Note that the .abi pseudo-op is not permitted if the ABI is not
specified on the command line. When the ABI is specified on the command
line, any .abi pseudo-ops in the source must match it.
- -shcompact-const-crange
Emit code-range descriptors for constants in SHcompact code sections.
- -no-mix
Disallow SHmedia code in the same section as constants and SHcompact
code.
- -no-expand
Do not expand MOVI, PT, PTA or PTB instructions.
- -expand-pt32
With -abi=64, expand PT, PTA and PTB instructions to 32 bits only.
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