Add loongarch64 support #535
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xen0n
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Nov 7, 2025
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Just a drive-by review prompted by loongson-community/discussions#105. The comments are made based on the latest (v0.2) version of Software Development and Build Convention for LoongArch Architectures.
| # define OGRE_CPU OGRE_CPU_ARM | ||
| #elif defined( __mips__ ) || defined( __mips64 ) || defined( __mips64_ ) || defined( _M_MIPS ) | ||
| # define OGRE_CPU OGRE_CPU_MIPS | ||
| #elif defined( __loongarch64 ) |
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Bitness is not reflected here, so just __loongarch__ will do.
Suggested change
| #elif defined( __loongarch64 ) | |
| #elif defined( __loongarch__ ) |
| defined( _M_ARM64 ) || defined( __mips64 ) || defined( __mips64_ ) || defined( __alpha__ ) || \ | ||
| defined( __ia64__ ) || defined( __e2k__ ) || defined( __s390__ ) || defined( __s390x__ ) || \ | ||
| ( defined( __riscv ) && __riscv_xlen == 64 ) | ||
| ( defined( __riscv ) && __riscv_xlen == 64 ) || defined( __loongarch64 ) |
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Check the ABI instead of target hardware capability (which may not be utilized to full extent).
Suggested change
| ( defined( __riscv ) && __riscv_xlen == 64 ) || defined( __loongarch64 ) | |
| ( defined( __riscv ) && __riscv_xlen == 64 ) || defined( __loongarch_lp64 ) |
| #if defined( __LP64__ ) || defined( _WIN64 ) || ( defined( __x86_64__ ) && !defined( __ILP32__ ) ) || \ | ||
| defined( _M_X64 ) || defined( __ia64 ) || defined( _M_IA64 ) || defined( __aarch64__ ) || \ | ||
| defined( __powerpc64__ ) | ||
| defined( __powerpc64__ ) || defined( __loongarch64 ) |
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This is not needed, both GCC and Clang on LoongArch64 already expose the __LP64__ macro which is already handled here.
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The LoongArch architecture (LoongArch) is an Instruction Set Architecture (ISA) that has a RISC style.
Documentations:
ISA:
https://loongson.github.io/LoongArch-Documentation/LoongArch-Vol1-EN.html
ABI:
https://loongson.github.io/LoongArch-Documentation/LoongArch-ELF-ABI-EN.html
More docs can be found at:
https://loongson.github.io/LoongArch-Documentation/README-EN.html