* Replacing the special tick character

The use of a special tick character in schema_isa.yaml cause
the riscof validateyaml command to fail in some environments.
This has been reported in the following issues.

https://github.com/riscv-software-src/riscof/issues/17
https://github.com/riscv-software-src/riscof/issues/107



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Signed-off-by: Neel Gala <neelgala@incoresemi.com>

Signed-off-by: Neel Gala <neelgala@incoresemi.com>
Co-authored-by: Brendan Sweeney <turtwig@utexas.edu>

relates to #142

Signed-off-by: Neel Gala <neelgala@incoresemi.com>
Co-authored-by: Neel Gala <neelgala@incoresemi.com>

* Adding support for Zilsd extension

* Split Zilsd into Zilsd and Zcmlsd

* isa_string variable in debug spec now depends on the hartid

* Bump version: 3.18.3 → 3.18.4

exclude svnapot and fix errors logged from ruamel.

Signed-off-by: Karthik B K <karthik.bk@incoresemi.com>

the get_march_mabi function should return a string that
can be consumed by the riscv-gcc right away. the compiler
complains about the presence of svnapot in the said string.
"nullify" this extension, resulting in exclusion during march generation.

Signed-off-by: Karthik B K <karthik.bk@incoresemi.com>

the load_yaml function performs a bit of post-processing
on the error message obtained from the ruamel constructor.
log the raw error message until the post-processing is corrected.

Signed-off-by: Karthik B K <karthik.bk@incoresemi.com>

Added yaml dump flag

mprv should not be implemented when U mode is absent.

mabi generation to account for E extension

Add ssdbltrp, smdbltrp, sddbltrp

Support march generation without custom extensions

Custom csr fields fix

Added function that returns the march and mabi for gcc from a given ISA