aboutsummaryrefslogtreecommitdiff
path: root/rtl/modexpng_parameters_x8.vh
diff options
context:
space:
mode:
authorPavel V. Shatov (Meister) <meisterpaul1@yandex.ru>2020-01-16 14:45:26 +0300
committerPavel V. Shatov (Meister) <meisterpaul1@yandex.ru>2020-01-16 14:45:26 +0300
commit83f8779a661202183f5866a4e80ef36f24b9e1ea (patch)
tree9a3f199a410f931f0b0608edd4dfd47df831280d /rtl/modexpng_parameters_x8.vh
parent6791175e7466ec09bf8464be99078ef33fe8da23 (diff)
Had to rework the general worker module to reach 180 MHz core clock. The module
is responsible for doing certain supporting operations (mostly moving operands between banks and doing some simple math operations, such as modular subtraction and regular addition). Depending on the particular operation, one of three bank address space sweep patterns was used: * one-pass (for things like carry propagation) * two-pass (for things like modular subtraction that produce intermediate values in the process) * one-pass interleaved (for copying when only either CRT_?.X or CRT_?.Y is rewritten: we can only write to X and Y simultaneously, so we have to interleave reads from the source bank with reads from the destination bank and overwrite the destination with its just read value, otherwise the second destination operand is lost) I initially coded three FSMs, one for each of the address space sweeps and triggered one of them depending on the opcode, but that turned out too complicated. There's now only one FSM that always does the "one-pass interleaved" pattern, whereas the second read (from the destination bank) is inhibited when not need by the opcode.
Diffstat (limited to 'rtl/modexpng_parameters_x8.vh')
0 files changed, 0 insertions, 0 deletions