6 Commits (0940b8a9d3e77b6f9a6f10d632d674cde0ac47ac)

Author	SHA1	Message	Date
Lars Asplund	0940b8a9d3	Organized VUnit testbenches into test cases. ... Several of the testbenches have stimuli code divided into sections preceded with a header comment explaining what is being tested. These sections have been made into VUnit test cases. The default behavior of VUnit is to run each test case in a separate simulation which comes with a number of benefits: * A failing test case doesn't prevent other test cases to be executed * Test cases are independent. A test case cannot fail as a side-effect to a problem with another test case * Test execution can be more parallelized and the overall test execution time reduced Signed-off-by: Lars Asplund <lars.anders.asplund@gmail.com>	3 years ago
Lars Asplund	08c0c4c1b4	Make core testbenches recognized by VUnit ... This commit also removes the dependencies these testbenches have on VHPIDIRECT. The use of VHPIDIRECT limits the number of available simulators for the project. Rather than using foreign functions the testbenches can be implemented entirely in VHDL where equivalent functionality exists. For these testbenches the VHPIDIRECT-based randomization functions were replaced with VHDL-based functions. The testbenches recognized by VUnit can be executed in parallel threads for better simulation performance using the -p option to the run.py script Signed-off-by: Lars Asplund <lars.anders.asplund@gmail.com>	3 years ago
Anton Blanchard	21f482f967	Reformat testbenches ... Signed-off-by: Anton Blanchard <anton@linux.ibm.com>	3 years ago
Anton Blanchard	ab86b58d95	Exit cleanly from testbench on success ... Signed-off-by: Anton Blanchard <anton@linux.ibm.com>	4 years ago
Paul Mackerras	8a0a907e2f	Implement the extswsli instruction ... This mainly required the addition of an entry to the opcode 31 decode table and a 32-bit sign-extender in the rotator. Signed-off-by: Paul Mackerras <paulus@ozlabs.org>	4 years ago
Paul Mackerras	f7c393ba7e	Add a rotate/mask/shift unit and use it in execute1 ... This adds a new entity 'rotator' which contains combinatorial logic for rotating and masking 64-bit values. It implements the operations of the rlwinm, rlwnm, rlwimi, rldicl, rldicr, rldic, rldimi, rldcl, rldcr, sld, slw, srd, srw, srad, sradi, sraw and srawi instructions. It consists of a 3-stage 64-bit rotator using 4:1 multiplexors at each stage, two mask generators, output logic and control logic. The insn_type_t values used for these instructions have been reduced to just 5: OP_RLC, OP_RLCL and OP_RLCR for the rotate and mask instructions (clear both left and right, clear left, clear right variants), OP_SHL for left shifts, and OP_SHR for right shifts. The control signals for the rotator are derived from the opcode and from the is_32bit and is_signed fields of the decode_rom_t. The rotator is instantiated as an entity in execute1 so that we can be sure we only have one of it. Signed-off-by: Paul Mackerras <paulus@ozlabs.org>	5 years ago