58a6a696a0
This commit adds the support for the following new Zc* series compressed instruction extensions: Zca - Subset of the C extension without FP loads and stores Zcb - "Simple" instructions Zcd - Double-precision floating-point instructions Zcf - Single-precision floating-point instructions Zcmp - "Complex" instructions for embedded CPUs Zcmt - Table jump instructions for embedded CPUs With the introduction of the Zc* extensions, the C extension now implies the following Zc* extensions: * Zca, always * Zcf if F is specified (RV32 only) * Zcd if D is specified The Zc* extensions that are implied by the C extension are not specified in the GCC `-march` flag because they are redundant and can interfere with the resolution of the correct multi-lib for the selected architecture unless the the alternate mappings for the redundant forms are manually specified. All the implementation details in this commit are based on the Zc* v1.0.0 specification, which is the ratified version. Signed-off-by: Stephanos Ioannidis <root@stephanos.io> |
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| arc | ||
| arm | ||
| arm64 | ||
| common | ||
| mips | ||
| posix | ||
| riscv | ||
| rx | ||
| sparc | ||
| x86 | ||
| xtensa | ||
| archs.yml | ||
| CMakeLists.txt | ||
| Kconfig | ||