Commit Graph

4 Commits

Author SHA1 Message Date
Ana Pazos 065b088759 [RISCV][MC] Reject bare symbols for the simm6 and simm6nonzero operand types
Summary:
Fixed assertions due to invalid fixup when encoding compressed instructions
 (c.addi, c.addiw, c.li, c.andi) with bare symbols with/without modifiers.
  This matches GAS behavior as well.

This bug was uncovered by a LLVM MC Disassembler Protocol Buffer Fuzzer
for the RISC-V assembly language.

Reviewers: asb

Reviewed By: asb

Subscribers: rbar, johnrusso, simoncook, sabuasal, niosHD, kito-cheng, shiva0217, zzheng, edward-jones, mgrang, rogfer01, MartinMosbeck, brucehoult, the_o, rkruppe, PkmX, jocewei, asb

Differential Revision: https://reviews.llvm.org/D52005

llvm-svn: 342160
2018-09-13 18:37:23 +00:00
Alex Bradbury 0ad4c265d7 [RISCV] Change shift amount operand of RVC shift instructions to uimmlog2xlennonzero
c.slli/c.srli/c.srai allow a 5-bit shift in RV32C and a 6-bit shift in RV64C.
This patch adds uimmlog2xlennonzero to reflect this constraint as well as
tests.

Differential Revision: https://reviews.llvm.org/D41216

Patch by Shiva Chen.

llvm-svn: 320799
2017-12-15 10:20:51 +00:00
Alex Bradbury 60714f98ba [RISCV] MC layer support for the remaining RVC instructions
Differential Revision: https://reviews.llvm.org/D40003

Patch by Shiva Chen.

llvm-svn: 320558
2017-12-13 09:32:55 +00:00
Alex Bradbury 9f6aec4b7a [RISCV] MC layer support for load/store instructions of the C (compressed) extension
Differential Revision: https://reviews.llvm.org/D40001
    
Patch by Shiva Chen.

llvm-svn: 320037
2017-12-07 12:50:32 +00:00