We want to evaluate whether the product of a and b is zero mod 2^64,
but the product might overflow, resulting in UB.  If we instead perform
the computation in unsigned arithmetic, the overflow behavior is defined.

Resolves #1538

Don't install spike's libfdt to avoid conflicts with system libfdt

riscv: sim.cc: Parse for "sifive,clint0" if "riscv,clint0" is absent

riscv: sim.cc: Parse for other compatible strings if "riscv,plic0" is absent

A/D updates in G-stage PTE

"riscv,plic0" and "sifive,plic-1.0.0" in device tree's "compatible" string point to the same driver,
as can be seen from drivers/irqchip/irq-sifive-plic.c in Linux kernel.
https://github.com/torvalds/linux/commit/5873ba559101fa37ad9764e79856f71bf54021aa


The other two "compatible" strings below isn't included,
because of their different plic behavior (plic_edge_init instead of plic_init as explained in the Linux commit).
- "andestech,nceplic100"
- "thead,c900-plic"

Signed-off-by: Tan En De <ende.tan@starfivetech.com>

"riscv,clint0" and "sifive,clint0" in device tree's "compatible" string point to the same driver,
as can be seen from drivers/clocksource/timer-clint.c in Linux kernel.
https://github.com/torvalds/linux/commit/2ac6795fcc085e8d03649f1bbd0d70aaff612cad



Signed-off-by: Tan En De <ende.tan@starfivetech.com>

Don't enforce alignment constraints vwsll.v[xi] rs1 arg

Add default cfg_t and debug_module_config_t constructor to libriscv

fix fmvh_x_d.h rv32 sign-extended

Signed-off-by: Madman <1017747824@qq.com>

Argument parsing should be scoped to the code which constucts cfg_t

Add unratified Zimop extension

Per-commit CI should start from oldest commit

Fix Spike --device option to pass on args to downstream plugins

miselect: support miselect when enabling smcsrind

Signed-off-by: YenHaoChen <39526191+YenHaoChen@users.noreply.github.com>

Add configurable system bus access delay

This is helpful to test OpenOCD behavior when sbbusyerror is set.

This is helpful to test OpenOCD behavior when sbbusyerror is set.

typo: vwsll.vi: fix a typo on disassembling vwsll.vi

Signed-off-by: YenHaoChen <39526191+YenHaoChen@users.noreply.github.com>

fix: dcsr.ebreak(v)[su] hardwired to 0 if unsupport corresponding privilege modes

remote_bitbang: make send_buf class member

Currently send buffer is static variable in function, which makes it's
impossible to have multiple concurrent instances of remote bitbang
class, since all of them would share this static buffer.
Thus, make send_buf a class member.

Signed-off-by: Volodymyr Fialko <vfialko@marvell.com>

stimecmp: perform menvcfg.STCE permission check when accessing vstimecmp in HS-mode

The spec requires menvcfg.STCE=1 on accessing stimecmp or vstimecmp in a
mode other than M-mode. The previous implementation does not check the
permission on accessing vstimecmp in HS-mode. This commit fixes the
issue by moveing the permission check from virtualized_stimecmp_csr_t to
stimecmp_csr_t, which implements the vstimecmp.