[Committed] RISC-V: Add basic support for the Zacas extension

Committed w/changelog fixup/sign-off and sent final version to the lists here: https://inbox.sourceware.org/gcc-patches/20240730152448.4089002-1-patr...@rivosinc.com/T/#u Approved during risc-v patchworks meeting by Jeff Law. Patrick On 7/29/24 15:13, Patrick O'Neill wrote: From: Gianluca Gui

[Committed] RISC-V: Add basic support for the Zacas extension

From: Gianluca Guida This patch adds support for amocas.{b|h|w|d}. Support for amocas.q (64/128 bit cas for rv32/64) will be added in a future patch. Extension: https://github.com/riscv/riscv-zacas Ratification: https://jira.riscv.org/browse/RVS-680 gcc/ChangeLog: * common/config/riscv