Commit Graph

4 Commits

Author SHA1 Message Date
Alex Bradbury 7d0e18d0dd [RISCV][MC] Reject bare symbols for the simm12 operand type
addi a0, a0, foo and lw a0, foo(a0) and similar are now rejected. An explicit 
%lo and %pcrel_lo modifier is required. This matches gas behaviour.

llvm-svn: 342487
2018-09-18 15:13:29 +00:00
Alex Bradbury 4dd94e0ccd [RISCV] MC layer support for the standard RV64F instruction set extension
llvm-svn: 320028
2017-12-07 11:02:55 +00:00
Alex Bradbury 7bc2a95bb9 [RISCV] MC layer support for the standard RV32D instruction set extension
As the FPR32 and FPR64 registers have the same names, use 
validateTargetOperandClass in RISCVAsmParser to coerce a parsed FPR32 to an 
FPR64 when necessary. The rest of this patch is very similar to the RV32F 
patch.

Differential Revision: https://reviews.llvm.org/D39895

llvm-svn: 320023
2017-12-07 10:46:23 +00:00
Alex Bradbury 0d6cf90663 [RISCV] MC layer support for the standard RV32F instruction set extension
The most interesting part of this patch is probably the handling of 
rounding mode arguments. Sadly, the RISC-V assembler handles floating point 
rounding modes as a special "argument" when it would be more consistent to 
handle them like the atomics, opcode suffixes. This patch supports parsing 
this optional parameter, using InstAlias to allow parsing these floating point 
instructions when no rounding mode is specified.

Differential Revision: https://reviews.llvm.org/D39893

llvm-svn: 320020
2017-12-07 10:26:05 +00:00