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Michael Neuling
b90a0a2139
Make the core go faster Several major improvements in here: - Simple branch predictor - Reduced latency for mispredicted branches and interrupts by removing fetch2 stage - Cache improvements o Request critical dword first on refill o Handle hits while refilling, including on line being refilled o Sizes doubled for both D and I - Loadstore improvements: can now do one load or store every two cycles in most cases - Optimized 2-cycle multiplier for Xilinx 7-series parts using DSP slices - Timing improvements, including: o Stash buffer in decode1 o Reduced width of execute1 result mux o Improved SPR decode in decode1 o Some non-critical operation take a cycle longer so we can break some long combinatorial chains - Core logging: logs 256 bits of info every cycle into a ring buffer, to help with debugging and performance analysis This increases the LUT usage for the "synth" + A35 target from 9182 to 10297 = 12%. |
4 years ago | |
|---|---|---|
| .. | ||
| LICENSE | 5 years ago | |
| arty_a7.xdc | 4 years ago | |
| clk_gen_bypass.vhd | 5 years ago | |
| clk_gen_mcmm.vhd | 5 years ago | |
| clk_gen_plle2.vhd | 5 years ago | |
| cmod_a7-35.xdc | 4 years ago | |
| firmware.hex | 5 years ago | |
| hello_world.hex | 4 years ago | |
| main_bram.vhdl | 4 years ago | |
| nexys-video.xdc | 4 years ago | |
| nexys_a7.xdc | 4 years ago | |
| pp_fifo.vhd | 4 years ago | |
| pp_soc_uart.vhd | 4 years ago | |
| pp_utilities.vhd | 5 years ago | |
| soc_reset.vhdl | 4 years ago | |
| soc_reset_tb.vhdl | 4 years ago | |
| top-arty.vhdl | 4 years ago | |
| top-generic.vhdl | 4 years ago | |
| top-nexys-video.vhdl | 4 years ago | |