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

spec 

ifies 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 SHcom 

pact. 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.