[Tinycc-devel] asm syntax of riscv64-asm.c

[noneofyourbusiness]

8cbbd2b88ac39815c79918610313984cc58db2bf

I propose supporting several syntaxes, at most only those that the RISC-V 
specifications themselves showcase.

RV32I V2.1:
 jalr x0, ra, 0
"C" extension V2.0:
 jalr x0, 0(rs1)
RISC-V ABI V1.0:
 jalr ra, ra, 0 
 jalr t1, t3

currently 
 jalr x0, 0(rs1)
 jalr x0, ra, 0
won't work

P.S. vector examples add more injury to the optional arg problem:
 vle32.v v0, (a1)
 vle32.v v0, (a1), v0.t