• Xavier Leroy's avatar
    RISC-V port and assorted changes · f642817f
    Xavier Leroy authored
    This commits adds code generation for the RISC-V architecture, both in 32- and 64-bit modes.
    
    The generated code was lightly tested using the simulator and cross-binutils from https://riscv.org/software-tools/
    
    This port required the following additional changes:
    
    - Integers: More properties about shrx
    
    - SelectOp: now provides smart constructors for mulhs and mulhu
    
    - SelectDiv, 32-bit integer division and modulus: implement constant propagation, use the new smart constructors mulhs and mulhu.
    
    - Runtime library: if no asm implementation is provided, run the reference C implementation through CompCert.  Since CompCert rejects the definitions of names of special functions such as __i64_shl, the reference implementation now uses "i64_" names, e.g. "i64_shl", and a renaming "i64_ -> __i64_" is performed over the generated assembly file, before assembling and building the runtime library.
    
    - test/: add SIMU make variable to run tests through a simulator
    
    - test/regression/alignas.c: make sure _Alignas and _Alignof are not #define'd by C headers
    
    commit da14495c01cf4f66a928c2feff5c53f09bde837f
    Author: Xavier Leroy <xavier.leroy@inria.fr>
    Date:   Thu Apr 13 17:36:10 2017 +0200
    
        RISC-V port, continued
    
        Now working on Asmgen.
    
    commit 36f36eb3a5abfbb8805960443d087b6a83e86005
    Author: Xavier Leroy <xavier.leroy@inria.fr>
    Date:   Wed Apr 12 17:26:39 2017 +0200
    
        RISC-V port, first steps
    
        This port is based on Prashanth Mundkur's experimental RV32 port and brings it up to date with CompCert, and adds 64-bit support (RV64).  Work in progress.
    f642817f