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Merge branch 'master' of https://github.com/supleed2/CPUProject

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Benjamin Ramhorst 2020-06-04 00:36:27 +01:00
parent 09dd851499 3647e0b15c
commit f8edff65a1
12 changed files with 830 additions and 748 deletions
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656
CPUProject.bdf
View file

@ -709,35 +709,6 @@ refer to the applicable agreement for further details.
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(text "CLK" (rect 0 0 23 19)(font "Intel Clear" (font_size 8)))
(text "CLK" (rect 21 27 44 46)(font "Intel Clear" (font_size 8)))
(line (pt 0 32)(pt 16 32))
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(text "FETCH" (rect 0 0 40 19)(font "Intel Clear" (font_size 8)))
(text "FETCH" (rect 59 27 99 46)(font "Intel Clear" (font_size 8)))
(line (pt 120 32)(pt 104 32))
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(text "EXEC" (rect 0 0 30 19)(font "Intel Clear" (font_size 8)))
(text "EXEC" (rect 69 43 99 62)(font "Intel Clear" (font_size 8)))
(line (pt 120 48)(pt 104 48))
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(drawing
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(symbol (symbol
(rect 256 -144 472 0) (rect 256 -144 472 0)
(text "ram_instr" (rect 81 0 144 16)(font "Arial" (font_size 10))) (text "ram_instr" (rect 81 0 144 16)(font "Arial" (font_size 10)))
@ -829,147 +800,6 @@ refer to the applicable agreement for further details.
(line (pt 0 0)(pt 0 0)) (line (pt 0 0)(pt 0 0))
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(rect 968 -152 1176 152)
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(text "s4" (rect 178 219 187 231)(font "Arial" ))
(line (pt 208 224)(pt 192 224))
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(port
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(text "RAMd_wren" (rect 139 235 187 247)(font "Arial" ))
(line (pt 208 240)(pt 192 240))
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(pt 208 256)
(output)
(text "RAMd_en" (rect 0 0 47 12)(font "Arial" ))
(text "RAMd_en" (rect 148 251 187 263)(font "Arial" ))
(line (pt 208 256)(pt 192 256))
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(port
(pt 208 272)
(output)
(text "RAMi_en" (rect 0 0 43 12)(font "Arial" ))
(text "RAMi_en" (rect 151 267 187 279)(font "Arial" ))
(line (pt 208 272)(pt 192 272))
)
(drawing
(rectangle (rect 16 16 192 288))
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)
(symbol (symbol
(rect 1024 304 1136 352) (rect 1024 304 1136 352)
(text "LPM_CONSTANT" (rect 4 0 125 16)(font "Arial" (font_size 10))) (text "LPM_CONSTANT" (rect 4 0 125 16)(font "Arial" (font_size 10)))
@ -1109,6 +939,211 @@ refer to the applicable agreement for further details.
(line (pt 0 0)(pt 0 0)) (line (pt 0 0)(pt 0 0))
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) )
(symbol
(rect 256 16 408 128)
(text "SM" (rect 5 0 20 12)(font "Arial" ))
(text "SM" (rect 8 96 23 113)(font "Intel Clear" ))
(port
(pt 0 32)
(input)
(text "CLK" (rect 0 0 21 12)(font "Arial" ))
(text "CLK" (rect 21 27 42 39)(font "Arial" ))
(line (pt 0 32)(pt 16 32))
)
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(port
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(text "EXEC1" (rect 0 0 34 12)(font "Arial" ))
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(drawing
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(text "DECODE" (rect 5 0 52 12)(font "Arial" ))
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(port
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(text "R6_en" (rect 161 139 187 151)(font "Arial" ))
(line (pt 208 144)(pt 192 144))
)
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(pt 208 160)
(output)
(text "R7_en" (rect 0 0 31 12)(font "Arial" ))
(text "R7_en" (rect 161 155 187 167)(font "Arial" ))
(line (pt 208 160)(pt 192 160))
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(port
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(output)
(text "s1[2..0]" (rect 0 0 37 12)(font "Arial" ))
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(line (pt 208 176)(pt 192 176)(line_width 3))
)
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(pt 208 192)
(output)
(text "s2[2..0]" (rect 0 0 37 12)(font "Arial" ))
(text "s2[2..0]" (rect 156 187 187 199)(font "Arial" ))
(line (pt 208 192)(pt 192 192)(line_width 3))
)
(port
(pt 208 208)
(output)
(text "s3[2..0]" (rect 0 0 37 12)(font "Arial" ))
(text "s3[2..0]" (rect 156 203 187 215)(font "Arial" ))
(line (pt 208 208)(pt 192 208)(line_width 3))
)
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(output)
(text "s4" (rect 0 0 11 12)(font "Arial" ))
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(output)
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(line (pt 208 240)(pt 192 240))
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(output)
(text "RAMd_en" (rect 0 0 47 12)(font "Arial" ))
(text "RAMd_en" (rect 148 251 187 263)(font "Arial" ))
(line (pt 208 256)(pt 192 256))
)
(port
(pt 208 272)
(output)
(text "RAMi_en" (rect 0 0 43 12)(font "Arial" ))
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(line (pt 208 272)(pt 192 272))
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(output)
(text "ALU_en" (rect 0 0 38 12)(font "Arial" ))
(text "ALU_en" (rect 155 283 187 295)(font "Arial" ))
(line (pt 208 288)(pt 192 288))
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(output)
(text "E2" (rect 0 0 12 12)(font "Arial" ))
(text "E2" (rect 177 299 187 311)(font "Arial" ))
(line (pt 208 304)(pt 192 304))
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(drawing
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)
(connector (connector
(pt 504 416) (pt 504 416)
(pt 632 416) (pt 632 416)
@ -1371,11 +1406,6 @@ refer to the applicable agreement for further details.
(pt 744 -56) (pt 744 -56)
(bus) (bus)
) )
(connector
(text "EXEC" (rect 783 -28 800 -3)(font "Intel Clear" )(vertical))
(pt 800 -32)
(pt 800 0)
)
(connector (connector
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@ -1646,21 +1676,6 @@ refer to the applicable agreement for further details.
(pt 160 256) (pt 160 256)
(bus) (bus)
) )
(connector
(text "CLK" (rect 236 40 256 57)(font "Intel Clear" ))
(pt 256 56)
(pt 224 56)
)
(connector
(text "EXEC" (rect 386 56 411 73)(font "Intel Clear" ))
(pt 376 72)
(pt 416 72)
)
(connector
(text "FETCH" (rect 386 40 417 57)(font "Intel Clear" ))
(pt 376 56)
(pt 416 56)
)
(connector (connector
(text "CLK" (rect 370 744 390 761)(font "Intel Clear" )) (text "CLK" (rect 370 744 390 761)(font "Intel Clear" ))
(pt 360 760) (pt 360 760)
@ -1749,109 +1764,6 @@ refer to the applicable agreement for further details.
(pt 912 -72) (pt 912 -72)
(bus) (bus)
) )
(connector
(pt 912 -72)
(pt 912 -120)
(bus)
)
(connector
(pt 912 -120)
(pt 968 -120)
(bus)
)
(connector
(text "COND" (rect 938 -104 967 -87)(font "Intel Clear" ))
(pt 968 -88)
(pt 928 -88)
)
(connector
(text "EXEC" (rect 938 -120 963 -103)(font "Intel Clear" ))
(pt 968 -104)
(pt 928 -104)
)
(connector
(text "R0_count" (rect 1186 -136 1230 -119)(font "Intel Clear" ))
(pt 1176 -120)
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)
(connector
(text "R0_en" (rect 1186 -120 1216 -103)(font "Intel Clear" ))
(pt 1176 -104)
(pt 1224 -104)
)
(connector
(text "R1_en" (rect 1186 -104 1216 -87)(font "Intel Clear" ))
(pt 1176 -88)
(pt 1224 -88)
)
(connector
(text "R2_en" (rect 1186 -88 1216 -71)(font "Intel Clear" ))
(pt 1176 -72)
(pt 1224 -72)
)
(connector
(text "R3_en" (rect 1186 -72 1216 -55)(font "Intel Clear" ))
(pt 1176 -56)
(pt 1224 -56)
)
(connector
(text "R4_en" (rect 1186 -56 1216 -39)(font "Intel Clear" ))
(pt 1176 -40)
(pt 1224 -40)
)
(connector
(text "R5_en" (rect 1186 -40 1216 -23)(font "Intel Clear" ))
(pt 1176 -24)
(pt 1224 -24)
)
(connector
(text "R6_en" (rect 1186 -24 1216 -7)(font "Intel Clear" ))
(pt 1176 -8)
(pt 1224 -8)
)
(connector
(text "R7_en" (rect 1186 -8 1216 9)(font "Intel Clear" ))
(pt 1176 8)
(pt 1224 8)
)
(connector
(text "s1[2..0]" (rect 1186 8 1220 25)(font "Intel Clear" ))
(pt 1176 24)
(pt 1224 24)
(bus)
)
(connector
(text "s2[2..0]" (rect 1186 24 1220 41)(font "Intel Clear" ))
(pt 1176 40)
(pt 1224 40)
(bus)
)
(connector
(text "s3[2..0]" (rect 1186 40 1220 57)(font "Intel Clear" ))
(pt 1176 56)
(pt 1224 56)
(bus)
)
(connector
(text "s4" (rect 1186 56 1196 73)(font "Intel Clear" ))
(pt 1176 72)
(pt 1224 72)
)
(connector
(text "RAMd_en" (rect 1186 88 1233 105)(font "Intel Clear" ))
(pt 1176 104)
(pt 1224 104)
)
(connector
(text "RAMi_en" (rect 1186 104 1229 121)(font "Intel Clear" ))
(pt 1176 120)
(pt 1224 120)
)
(connector
(text "RAMd_wren" (rect 1186 72 1245 89)(font "Intel Clear" ))
(pt 1176 88)
(pt 1240 88)
)
(connector (connector
(pt 472 -112) (pt 472 -112)
(pt 488 -112) (pt 488 -112)
@ -1875,7 +1787,7 @@ refer to the applicable agreement for further details.
(bus) (bus)
) )
(connector (connector
(text "s1[2..0]" (rect 462 105 479 139)(font "Intel Clear" )(vertical)) (text "s1[2..0]" (rect 461 104 478 138)(font "Intel Clear" )(vertical))
(pt 480 128) (pt 480 128)
(pt 480 104) (pt 480 104)
(bus) (bus)
@ -1927,6 +1839,161 @@ refer to the applicable agreement for further details.
(pt 1024 488) (pt 1024 488)
(pt 1048 488) (pt 1048 488)
) )
(connector
(text "FETCH" (rect 418 32 449 49)(font "Intel Clear" ))
(pt 408 48)
(pt 448 48)
)
(connector
(text "CLK" (rect 236 32 256 49)(font "Intel Clear" ))
(pt 256 48)
(pt 224 48)
)
(connector
(text "E2" (rect 234 48 245 65)(font "Intel Clear" ))
(pt 256 64)
(pt 224 64)
)
(connector
(text "EXEC2" (rect 418 64 449 81)(font "Intel Clear" ))
(pt 408 80)
(pt 448 80)
)
(connector
(text "EXEC1" (rect 418 48 449 65)(font "Intel Clear" ))
(pt 408 64)
(pt 448 64)
)
(connector
(text "R0_count" (rect 1186 -168 1230 -151)(font "Intel Clear" ))
(pt 1176 -152)
(pt 1224 -152)
)
(connector
(text "R0_en" (rect 1186 -152 1216 -135)(font "Intel Clear" ))
(pt 1176 -136)
(pt 1224 -136)
)
(connector
(text "R1_en" (rect 1186 -136 1216 -119)(font "Intel Clear" ))
(pt 1176 -120)
(pt 1224 -120)
)
(connector
(text "R2_en" (rect 1186 -120 1216 -103)(font "Intel Clear" ))
(pt 1176 -104)
(pt 1224 -104)
)
(connector
(text "R3_en" (rect 1186 -104 1216 -87)(font "Intel Clear" ))
(pt 1176 -88)
(pt 1224 -88)
)
(connector
(text "R4_en" (rect 1186 -88 1216 -71)(font "Intel Clear" ))
(pt 1176 -72)
(pt 1224 -72)
)
(connector
(text "R5_en" (rect 1186 -72 1216 -55)(font "Intel Clear" ))
(pt 1176 -56)
(pt 1224 -56)
)
(connector
(text "R6_en" (rect 1186 -56 1216 -39)(font "Intel Clear" ))
(pt 1176 -40)
(pt 1224 -40)
)
(connector
(text "R7_en" (rect 1186 -40 1216 -23)(font "Intel Clear" ))
(pt 1176 -24)
(pt 1224 -24)
)
(connector
(text "s1[2..0]" (rect 1186 -24 1220 -7)(font "Intel Clear" ))
(pt 1176 -8)
(pt 1224 -8)
(bus)
)
(connector
(text "s2[2..0]" (rect 1186 -8 1220 9)(font "Intel Clear" ))
(pt 1176 8)
(pt 1224 8)
(bus)
)
(connector
(text "s3[2..0]" (rect 1186 8 1220 25)(font "Intel Clear" ))
(pt 1176 24)
(pt 1224 24)
(bus)
)
(connector
(text "s4" (rect 1186 24 1196 41)(font "Intel Clear" ))
(pt 1176 40)
(pt 1224 40)
)
(connector
(text "RAMd_en" (rect 1186 56 1233 73)(font "Intel Clear" ))
(pt 1176 72)
(pt 1224 72)
)
(connector
(text "RAMi_en" (rect 1186 72 1229 89)(font "Intel Clear" ))
(pt 1176 88)
(pt 1224 88)
)
(connector
(text "RAMd_wren" (rect 1186 40 1245 57)(font "Intel Clear" ))
(pt 1176 56)
(pt 1240 56)
)
(connector
(text "EXEC1" (rect 938 -152 969 -135)(font "Intel Clear" ))
(pt 968 -136)
(pt 928 -136)
)
(connector
(text "COND" (rect 938 -120 967 -103)(font "Intel Clear" ))
(pt 928 -104)
(pt 968 -104)
)
(connector
(text "ALU_en" (rect 1186 88 1223 105)(font "Intel Clear" ))
(pt 1176 104)
(pt 1224 104)
)
(connector
(text "EXEC2" (rect 938 -136 969 -119)(font "Intel Clear" ))
(pt 968 -120)
(pt 928 -120)
)
(connector
(pt 968 -152)
(pt 912 -152)
(bus)
)
(connector
(text "instr[15..10]" (rect 888 -65 905 -10)(font "Intel Clear" )(vertical))
(pt 912 -72)
(pt 912 0)
(bus)
)
(connector
(text "instr[15..0]" (rect 888 -148 905 -99)(font "Intel Clear" )(vertical))
(pt 912 -152)
(pt 912 -72)
(bus)
)
(connector
(text "EXEC1" (rect 783 -28 800 3)(font "Intel Clear" )(vertical))
(pt 800 -32)
(pt 800 8)
)
(connector
(text "E2" (rect 1186 104 1197 121)(font "Intel Clear" ))
(pt 1176 120)
(pt 1224 120)
)
(junction (pt 504 416)) (junction (pt 504 416))
(junction (pt 504 192)) (junction (pt 504 192))
(junction (pt 520 432)) (junction (pt 520 432))
@ -1959,3 +2026,4 @@ refer to the applicable agreement for further details.
(junction (pt 160 448)) (junction (pt 160 448))
(junction (pt 856 192)) (junction (pt 856 192))
(junction (pt 872 -72)) (junction (pt 872 -72))
(junction (pt 912 -72))

14
CPUProject.qsf
View file

@ -41,10 +41,15 @@ set_global_assignment -name DEVICE AUTO
set_global_assignment -name TOP_LEVEL_ENTITY CPUProject set_global_assignment -name TOP_LEVEL_ENTITY CPUProject
set_global_assignment -name ORIGINAL_QUARTUS_VERSION 18.1.0 set_global_assignment -name ORIGINAL_QUARTUS_VERSION 18.1.0
set_global_assignment -name PROJECT_CREATION_TIME_DATE "12:38:11 MAY 20, 2020" set_global_assignment -name PROJECT_CREATION_TIME_DATE "12:38:11 MAY 20, 2020"
set_global_assignment -name LAST_QUARTUS_VERSION "19.1.0 Lite Edition" set_global_assignment -name LAST_QUARTUS_VERSION "18.1.0 Lite Edition"
set_global_assignment -name PROJECT_OUTPUT_DIRECTORY output_files set_global_assignment -name PROJECT_OUTPUT_DIRECTORY output_files
set_global_assignment -name TIMING_ANALYZER_MULTICORNER_ANALYSIS ON set_global_assignment -name TIMING_ANALYZER_MULTICORNER_ANALYSIS ON
set_global_assignment -name NUM_PARALLEL_PROCESSORS ALL set_global_assignment -name NUM_PARALLEL_PROCESSORS ALL
set_global_assignment -name PARTITION_NETLIST_TYPE SOURCE -section_id Top
set_global_assignment -name PARTITION_FITTER_PRESERVATION_LEVEL PLACEMENT_AND_ROUTING -section_id Top
set_global_assignment -name PARTITION_COLOR 16764057 -section_id Top
set_instance_assignment -name PARTITION_HIERARCHY root_partition -to | -section_id Top
set_global_assignment -name VERILOG_FILE alu.v
set_global_assignment -name MIF_FILE LUTSquares.mif set_global_assignment -name MIF_FILE LUTSquares.mif
set_global_assignment -name BDF_FILE mul8.bdf set_global_assignment -name BDF_FILE mul8.bdf
set_global_assignment -name BDF_FILE abs.bdf set_global_assignment -name BDF_FILE abs.bdf
@ -53,14 +58,11 @@ set_global_assignment -name BDF_FILE reg_file.bdf
set_global_assignment -name BDF_FILE mux_8x16.bdf set_global_assignment -name BDF_FILE mux_8x16.bdf
set_global_assignment -name QIP_FILE ram_data.qip set_global_assignment -name QIP_FILE ram_data.qip
set_global_assignment -name QIP_FILE ram_instr.qip set_global_assignment -name QIP_FILE ram_instr.qip
set_global_assignment -name BDF_FILE SM.bdf
set_global_assignment -name VERILOG_FILE DECODE.v set_global_assignment -name VERILOG_FILE DECODE.v
set_global_assignment -name MIF_FILE data.mif set_global_assignment -name MIF_FILE data.mif
set_global_assignment -name MIF_FILE instr.mif set_global_assignment -name MIF_FILE instr.mif
set_global_assignment -name BDF_FILE mul16.bdf set_global_assignment -name BDF_FILE mul16.bdf
set_global_assignment -name QIP_FILE LUT.qip set_global_assignment -name QIP_FILE LUT.qip
set_global_assignment -name VERILOG_FILE min.v set_global_assignment -name VERILOG_FILE min.v
set_global_assignment -name PARTITION_NETLIST_TYPE SOURCE -section_id Top set_global_assignment -name VERILOG_FILE SM.v
set_global_assignment -name PARTITION_FITTER_PRESERVATION_LEVEL PLACEMENT_AND_ROUTING -section_id Top set_global_assignment -name VECTOR_WAVEFORM_FILE Waveform.vwf
set_global_assignment -name PARTITION_COLOR 16764057 -section_id Top
set_instance_assignment -name PARTITION_HIERARCHY root_partition -to | -section_id Top

BIN
CPUProject.qws
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Binary file not shown.

35
DECODE.bsf
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@ -20,9 +20,9 @@ refer to the applicable agreement for further details.
*/ */
(header "symbol" (version "1.1")) (header "symbol" (version "1.1"))
(symbol (symbol
(rect 16 16 224 320) (rect 16 16 224 352)
(text "DECODE" (rect 5 0 47 12)(font "Arial" )) (text "DECODE" (rect 5 0 47 12)(font "Arial" ))
(text "inst" (rect 8 288 20 300)(font "Arial" )) (text "inst" (rect 8 320 20 332)(font "Arial" ))
(port (port
(pt 0 32) (pt 0 32)
(input) (input)
@ -33,17 +33,24 @@ refer to the applicable agreement for further details.
(port (port
(pt 0 48) (pt 0 48)
(input) (input)
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(text "EXEC" (rect 21 43 48 55)(font "Arial" )) (text "EXEC1" (rect 21 43 51 55)(font "Arial" ))
(line (pt 0 48)(pt 16 48)(line_width 1)) (line (pt 0 48)(pt 16 48)(line_width 1))
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(port (port
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(input) (input)
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(text "COND_result" (rect 21 59 76 71)(font "Arial" )) (text "EXEC2" (rect 21 59 52 71)(font "Arial" ))
(line (pt 0 64)(pt 16 64)(line_width 1)) (line (pt 0 64)(pt 16 64)(line_width 1))
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(port
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(text "COND_result" (rect 0 0 55 12)(font "Arial" ))
(text "COND_result" (rect 21 75 76 87)(font "Arial" ))
(line (pt 0 80)(pt 16 80)(line_width 1))
)
(port (port
(pt 208 32) (pt 208 32)
(output) (output)
@ -156,7 +163,21 @@ refer to the applicable agreement for further details.
(text "RAMi_en" (rect 146 267 187 279)(font "Arial" )) (text "RAMi_en" (rect 146 267 187 279)(font "Arial" ))
(line (pt 208 272)(pt 192 272)(line_width 1)) (line (pt 208 272)(pt 192 272)(line_width 1))
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(port
(pt 208 288)
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(text "ALU_en" (rect 0 0 36 12)(font "Arial" ))
(text "ALU_en" (rect 151 283 187 295)(font "Arial" ))
(line (pt 208 288)(pt 192 288)(line_width 1))
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(port
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(text "E2" (rect 176 299 187 311)(font "Arial" ))
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) )

75
DECODE.v
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@ -1,7 +1,8 @@
module DECODE module DECODE
( (
input [15:0] instr, input [15:0] instr,
input EXEC, input EXEC1,
input EXEC2,
input COND_result, input COND_result,
output R0_count, output R0_count,
output R0_en, output R0_en,
@ -18,7 +19,9 @@ module DECODE
output s4, output s4,
output RAMd_wren, output RAMd_wren,
output RAMd_en, output RAMd_en,
output RAMi_en output RAMi_en,
output ALU_en,
output E2
); );
wire msb = instr[15]; //MSB of the instruction word wire msb = instr[15]; //MSB of the instruction word
@ -35,54 +38,36 @@ module DECODE
wire STORE = msb & ls; wire STORE = msb & ls;
wire UJMP = ~op[5] & ~op[4] & ~op[3] & ~op[2]; wire UJMP = ~op[5] & ~op[4] & ~op[3] & ~op[2];
wire JMP = (~op[5] & ~op[4] & ~op[3] & op[2]) | (~op[5] & ~op[4] & op[3] & ~op[2]); wire JMP = (~op[5] & ~op[4] & ~op[3] & op[2]) | (~op[5] & ~op[4] & op[3] & ~op[2]);
wire AND = ~op[5] & ~op[4] & op[3] & op[2] & ~op[1] & ~op[0];
wire OR = ~op[5] & ~op[4] & op[3] & op[2] & ~op[1] & op[0];
wire XOR = ~op[5] & ~op[4] & op[3] & op[2] & op[1] & ~op[0];
wire NOT = ~op[5] & ~op[4] & op[3] & op[2] & op[1] & op[0];
wire NND = ~op[5] & op[4] & ~op[3] & ~op[2] & ~op[1] & ~op[0];
wire NOR = ~op[5] & op[4] & ~op[3] & ~op[2] & ~op[1] & op[0];
wire XNR = ~op[5] & op[4] & ~op[3] & ~op[2] & op[1] & ~op[0];
wire MOV = ~op[5] & op[4] & ~op[3] & ~op[2] & op[1] & op[0];
wire ADD = ~op[5] & op[4] & ~op[3] & op[2] & ~op[1] & ~op[0];
wire ADC = ~op[5] & op[4] & ~op[3] & op[2] & ~op[1] & op[0];
wire ADO = ~op[5] & op[4] & ~op[3] & op[2] & op[1] & ~op[0];
wire SUB = ~op[5] & op[4] & op[3] & ~op[2] & ~op[1] & ~op[0];
wire SBC = ~op[5] & op[4] & op[3] & ~op[2] & ~op[1] & op[0];
wire SBO = ~op[5] & op[4] & op[3] & ~op[2] & op[1] & ~op[0];
wire MUL = ~op[5] & op[4] & op[3] & op[2] & ~op[1] & ~op[0]; wire MUL = ~op[5] & op[4] & op[3] & op[2] & ~op[1] & ~op[0];
wire MLA = ~op[5] & op[4] & op[3] & op[2] & ~op[1] & op[0]; wire MLA = ~op[5] & op[4] & op[3] & op[2] & ~op[1] & op[0];
wire MLS = ~op[5] & op[4] & op[3] & op[2] & op[1] & ~op[0]; wire MLS = ~op[5] & op[4] & op[3] & op[2] & op[1] & ~op[0];
wire MRT = ~op[5] & op[4] & op[3] & op[2] & op[1] & op[0];
wire LSL = op[5] & ~op[4] & ~op[3] & ~op[2] & ~op[1] & ~op[0];
wire LSR = op[5] & ~op[4] & ~op[3] & ~op[2] & ~op[1] & op[0];
wire ASR = op[5] & ~op[4] & ~op[3] & ~op[2] & op[1] & ~op[0];
wire ROR = op[5] & ~op[4] & ~op[3] & op[2] & ~op[1] & ~op[0];
wire RRC = op[5] & ~op[4] & ~op[3] & op[2] & ~op[1] & op[0];
wire NOP = op[5] & op[4] & op[3] & op[2] & op[1] & ~op[0]; wire NOP = op[5] & op[4] & op[3] & op[2] & op[1] & ~op[0];
wire STP = op[5] & op[4] & op[3] & op[2] & op[1] & op[0]; wire STP = op[5] & op[4] & op[3] & op[2] & op[1] & op[0];
assign R0_count = EXEC & (~(UJMP | JMP | STP)); assign R0_count = EXEC1 & (~(UJMP | JMP | STP));
assign R0_en = EXEC & (~(STORE | NOP | STP) & ~Rd[2] & ~Rd[1] & ~Rd[0] | LOAD & ~Rls[2] & ~Rls[1] & ~Rls[0] | UJMP | JMP & COND_result); assign R0_en = EXEC1 & (~(STORE | NOP | STP) & ~Rd[2] & ~Rd[1] & ~Rd[0] | UJMP | JMP & COND_result) | EXEC2 & (LOAD | MUL | MLA | MLS) & ~Rls[2] & ~Rls[1] & ~Rls[0];
assign R1_en = EXEC & (~(UJMP | JMP | STORE | LOAD | NOP | STP) & ~Rd[2] & ~Rd[1] & Rd[0] | LOAD & ~Rls[2] & ~Rls[1] & Rls[0]); assign R1_en = EXEC1 & ~(UJMP | JMP | STORE | LOAD | MUL | MLA | MLS | NOP | STP) & ~Rd[2] & ~Rd[1] & Rd[0] | EXEC2 & (LOAD | MUL | MLA | MLS) & ~Rls[2] & ~Rls[1] & Rls[0];
assign R2_en = EXEC & (~(UJMP | JMP | STORE | LOAD | NOP | STP) & ~Rd[2] & Rd[1] & ~Rd[0] | LOAD & ~Rls[2] & Rls[1] & ~Rls[0]); assign R2_en = EXEC1 & ~(UJMP | JMP | STORE | LOAD | MUL | MLA | MLS | NOP | STP) & ~Rd[2] & Rd[1] & ~Rd[0] | EXEC2 & (LOAD | MUL | MLA | MLS) & ~Rls[2] & Rls[1] & ~Rls[0];
assign R3_en = EXEC & (~(UJMP | JMP | STORE | LOAD | NOP | STP) & ~Rd[2] & Rd[1] & Rd[0] | LOAD & ~Rls[2] & Rls[1] & Rls[0]); assign R3_en = EXEC1 & ~(UJMP | JMP | STORE | LOAD | MUL | MLA | MLS | NOP | STP) & ~Rd[2] & Rd[1] & Rd[0] | EXEC2 & (LOAD | MUL | MLA | MLS) & ~Rls[2] & Rls[1] & Rls[0];
assign R4_en = EXEC & (~(UJMP | JMP | STORE | LOAD | NOP | STP) & Rd[2] & ~Rd[1] & ~Rd[0] | LOAD & Rls[2] & ~Rls[1] & ~Rls[0]); assign R4_en = EXEC1 & ~(UJMP | JMP | STORE | LOAD | MUL | MLA | MLS | NOP | STP) & Rd[2] & ~Rd[1] & ~Rd[0] | EXEC2 & (LOAD | MUL | MLA | MLS) & Rls[2] & ~Rls[1] & ~Rls[0];
assign R5_en = EXEC & (~(UJMP | JMP | STORE | LOAD | NOP | STP) & Rd[2] & ~Rd[1] & Rd[0] | LOAD & Rls[2] & ~Rls[1] & Rls[0]); assign R5_en = EXEC1 & ~(UJMP | JMP | STORE | LOAD | MUL | MLA | MLS | NOP | STP) & Rd[2] & ~Rd[1] & Rd[0] | EXEC2 & (LOAD | MUL | MLA | MLS) & Rls[2] & ~Rls[1] & Rls[0];
assign R6_en = EXEC & (~(UJMP | JMP | STORE | LOAD | NOP | STP) & Rd[2] & Rd[1] & ~Rd[0] | LOAD & Rls[2] & Rls[1] & ~Rls[0]); assign R6_en = EXEC1 & ~(UJMP | JMP | STORE | LOAD | MUL | MLA | MLS | NOP | STP) & Rd[2] & Rd[1] & ~Rd[0] | EXEC2 & (LOAD | MUL | MLA | MLS) & Rls[2] & Rls[1] & ~Rls[0];
assign R7_en = EXEC & (~(UJMP | JMP | STORE | LOAD | NOP | STP) & Rd[2] & Rd[1] & Rd[0] | LOAD & Rls[2] & Rls[1] & Rls[0]); assign R7_en = EXEC1 & ~(UJMP | JMP | STORE | LOAD | MUL | MLA | MLS | NOP | STP) & Rd[2] & Rd[1] & Rd[0] | EXEC2 & (LOAD | MUL | MLA | MLS) & Rls[2] & Rls[1] & Rls[0];
assign s1[2] = EXEC & ((~(UJMP | JMP | STORE | LOAD | NOP | STP) & Rs1[2]) | (STORE & Rls[2])); assign s1[2] = EXEC1 & ((~(UJMP | JMP | STORE | LOAD | NOP | STP) & Rs1[2]) | (STORE & Rls[2]));
assign s1[1] = EXEC & ((~(UJMP | JMP | STORE | LOAD | NOP | STP) & Rs1[1]) | (STORE & Rls[1])); assign s1[1] = EXEC1 & ((~(UJMP | JMP | STORE | LOAD | NOP | STP) & Rs1[1]) | (STORE & Rls[1]));
assign s1[0] = EXEC & ((~(UJMP | JMP | STORE | LOAD | NOP | STP) & Rs1[0]) | (STORE & Rls[0])); assign s1[0] = EXEC1 & ((~(UJMP | JMP | STORE | LOAD | NOP | STP) & Rs1[0]) | (STORE & Rls[0]));
assign s2[2] = EXEC & ((~(UJMP | JMP | STORE | LOAD | NOP | STP)) & Rs2[2]); assign s2[2] = EXEC1 & ((~(UJMP | JMP | STORE | LOAD | NOP | STP)) & Rs2[2]);
assign s2[1] = EXEC & ((~(UJMP | JMP | STORE | LOAD | NOP | STP)) & Rs2[1]); assign s2[1] = EXEC1 & ((~(UJMP | JMP | STORE | LOAD | NOP | STP)) & Rs2[1]);
assign s2[0] = EXEC & ((~(UJMP | JMP | STORE | LOAD | NOP | STP)) & Rs2[0]); assign s2[0] = EXEC1 & ((~(UJMP | JMP | STORE | LOAD | NOP | STP)) & Rs2[0]);
assign s3[2] = EXEC & ((~(UJMP | JMP | STORE | LOAD | NOP | STP)) & Rd[2]); assign s3[2] = EXEC1 & ((~(UJMP | JMP | STORE | LOAD | NOP | STP)) & Rd[2]);
assign s3[1] = EXEC & ((~(UJMP | JMP | STORE | LOAD | NOP | STP)) & Rd[1]); assign s3[1] = EXEC1 & ((~(UJMP | JMP | STORE | LOAD | NOP | STP)) & Rd[1]);
assign s3[0] = EXEC & ((~(UJMP | JMP | STORE | LOAD | NOP | STP)) & Rd[0]); assign s3[0] = EXEC1 & ((~(UJMP | JMP | STORE | LOAD | NOP | STP)) & Rd[0]);
assign s4 = EXEC & ~(LOAD | STORE); assign s4 = EXEC1 & ~(LOAD | STORE);
assign RAMd_wren = EXEC & STORE; assign RAMd_wren = EXEC1 & STORE;
assign RAMd_en = EXEC & (STORE | LOAD); assign RAMd_en = EXEC1 & (STORE | LOAD);
assign RAMi_en = EXEC & ~STP; assign RAMi_en = EXEC1 & ~STP | EXEC2 & (LOAD | MUL | MLA | MLS);
assign ALU_en = LOAD | STORE;
assign E2 = EXEC1 & (LOAD | MUL | MLA | MLS);
endmodule endmodule

88
DECODE.v.bak Normal file
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@ -0,0 +1,88 @@
module DECODE
(
input [15:0] instr,
input EXEC,
input COND_result,
output R0_count,
output R0_en,
output R1_en,
output R2_en,
output R3_en,
output R4_en,
output R5_en,
output R6_en,
output R7_en,
output [2:0] s1,
output [2:0] s2,
output [2:0] s3,
output s4,
output RAMd_wren,
output RAMd_en,
output RAMi_en
);
wire msb = instr[15]; //MSB of the instruction word
wire ls = instr[14]; //LOAD or STORE bit
wire [2:0] Rls = instr[13:11]; //Register in the LOAD/STORE operation
wire [10:0] addr = instr[10:0]; //Memory address in the LOAD/STORE operation
wire [5:0] op = instr[14:9]; //Opcode in regular instructions
wire [2:0] Rd = instr[8:6]; //Destination register in command
wire [2:0] Rs1 = instr[5:3]; //Source register 1 in command
wire [2:0] Rs2 = instr[2:0]; //Source register 2 in command
//Different opcodes (refer to documentation):
wire LOAD = msb & ~ls;
wire STORE = msb & ls;
wire UJMP = ~op[5] & ~op[4] & ~op[3] & ~op[2];
wire JMP = (~op[5] & ~op[4] & ~op[3] & op[2]) | (~op[5] & ~op[4] & op[3] & ~op[2]);
wire AND = ~op[5] & ~op[4] & op[3] & op[2] & ~op[1] & ~op[0];
wire OR = ~op[5] & ~op[4] & op[3] & op[2] & ~op[1] & op[0];
wire XOR = ~op[5] & ~op[4] & op[3] & op[2] & op[1] & ~op[0];
wire NOT = ~op[5] & ~op[4] & op[3] & op[2] & op[1] & op[0];
wire NND = ~op[5] & op[4] & ~op[3] & ~op[2] & ~op[1] & ~op[0];
wire NOR = ~op[5] & op[4] & ~op[3] & ~op[2] & ~op[1] & op[0];
wire XNR = ~op[5] & op[4] & ~op[3] & ~op[2] & op[1] & ~op[0];
wire MOV = ~op[5] & op[4] & ~op[3] & ~op[2] & op[1] & op[0];
wire ADD = ~op[5] & op[4] & ~op[3] & op[2] & ~op[1] & ~op[0];
wire ADC = ~op[5] & op[4] & ~op[3] & op[2] & ~op[1] & op[0];
wire ADO = ~op[5] & op[4] & ~op[3] & op[2] & op[1] & ~op[0];
wire SUB = ~op[5] & op[4] & op[3] & ~op[2] & ~op[1] & ~op[0];
wire SBC = ~op[5] & op[4] & op[3] & ~op[2] & ~op[1] & op[0];
wire SBO = ~op[5] & op[4] & op[3] & ~op[2] & op[1] & ~op[0];
wire MUL = ~op[5] & op[4] & op[3] & op[2] & ~op[1] & ~op[0];
wire MLA = ~op[5] & op[4] & op[3] & op[2] & ~op[1] & op[0];
wire MLS = ~op[5] & op[4] & op[3] & op[2] & op[1] & ~op[0];
wire MRT = ~op[5] & op[4] & op[3] & op[2] & op[1] & op[0];
wire LSL = op[5] & ~op[4] & ~op[3] & ~op[2] & ~op[1] & ~op[0];
wire LSR = op[5] & ~op[4] & ~op[3] & ~op[2] & ~op[1] & op[0];
wire ASR = op[5] & ~op[4] & ~op[3] & ~op[2] & op[1] & ~op[0];
wire ROR = op[5] & ~op[4] & ~op[3] & op[2] & ~op[1] & ~op[0];
wire RRC = op[5] & ~op[4] & ~op[3] & op[2] & ~op[1] & op[0];
wire NOP = op[5] & op[4] & op[3] & op[2] & op[1] & ~op[0];
wire STP = op[5] & op[4] & op[3] & op[2] & op[1] & op[0];
assign R0_count = EXEC & (~(UJMP | JMP | STP));
assign R0_en = EXEC & (~(STORE | NOP | STP) & ~Rd[2] & ~Rd[1] & ~Rd[0] | LOAD & ~Rls[2] & ~Rls[1] & ~Rls[0] | UJMP | JMP & COND_result);
assign R1_en = EXEC & (~(UJMP | JMP | STORE | LOAD | NOP | STP) & ~Rd[2] & ~Rd[1] & Rd[0] | LOAD & ~Rls[2] & ~Rls[1] & Rls[0]);
assign R2_en = EXEC & (~(UJMP | JMP | STORE | LOAD | NOP | STP) & ~Rd[2] & Rd[1] & ~Rd[0] | LOAD & ~Rls[2] & Rls[1] & ~Rls[0]);
assign R3_en = EXEC & (~(UJMP | JMP | STORE | LOAD | NOP | STP) & ~Rd[2] & Rd[1] & Rd[0] | LOAD & ~Rls[2] & Rls[1] & Rls[0]);
assign R4_en = EXEC & (~(UJMP | JMP | STORE | LOAD | NOP | STP) & Rd[2] & ~Rd[1] & ~Rd[0] | LOAD & Rls[2] & ~Rls[1] & ~Rls[0]);
assign R5_en = EXEC & (~(UJMP | JMP | STORE | LOAD | NOP | STP) & Rd[2] & ~Rd[1] & Rd[0] | LOAD & Rls[2] & ~Rls[1] & Rls[0]);
assign R6_en = EXEC & (~(UJMP | JMP | STORE | LOAD | NOP | STP) & Rd[2] & Rd[1] & ~Rd[0] | LOAD & Rls[2] & Rls[1] & ~Rls[0]);
assign R7_en = EXEC & (~(UJMP | JMP | STORE | LOAD | NOP | STP) & Rd[2] & Rd[1] & Rd[0] | LOAD & Rls[2] & Rls[1] & Rls[0]);
assign s1[2] = EXEC & ((~(UJMP | JMP | STORE | LOAD | NOP | STP) & Rs1[2]) | (STORE & Rls[2]));
assign s1[1] = EXEC & ((~(UJMP | JMP | STORE | LOAD | NOP | STP) & Rs1[1]) | (STORE & Rls[1]));
assign s1[0] = EXEC & ((~(UJMP | JMP | STORE | LOAD | NOP | STP) & Rs1[0]) | (STORE & Rls[0]));
assign s2[2] = EXEC & ((~(UJMP | JMP | STORE | LOAD | NOP | STP)) & Rs2[2]);
assign s2[1] = EXEC & ((~(UJMP | JMP | STORE | LOAD | NOP | STP)) & Rs2[1]);
assign s2[0] = EXEC & ((~(UJMP | JMP | STORE | LOAD | NOP | STP)) & Rs2[0]);
assign s3[2] = EXEC & ((~(UJMP | JMP | STORE | LOAD | NOP | STP)) & Rd[2]);
assign s3[1] = EXEC & ((~(UJMP | JMP | STORE | LOAD | NOP | STP)) & Rd[1]);
assign s3[0] = EXEC & ((~(UJMP | JMP | STORE | LOAD | NOP | STP)) & Rd[0]);
assign s4 = EXEC & ~(LOAD | STORE);
assign RAMd_wren = EXEC & STORE;
assign RAMd_en = EXEC & (STORE | LOAD);
assign RAMi_en = EXEC & ~STP;
endmodule

283
SM.bdf
View file

@ -1,283 +0,0 @@
/*
WARNING: Do NOT edit the input and output ports in this file in a text
editor if you plan to continue editing the block that represents it in
the Block Editor! File corruption is VERY likely to occur.
*/
/*
Copyright (C) 2018 Intel Corporation. All rights reserved.
Your use of Intel Corporation's design tools, logic functions
and other software and tools, and its AMPP partner logic
functions, and any output files from any of the foregoing
(including device programming or simulation files), and any
associated documentation or information are expressly subject
to the terms and conditions of the Intel Program License
Subscription Agreement, the Intel Quartus Prime License Agreement,
the Intel FPGA IP License Agreement, or other applicable license
agreement, including, without limitation, that your use is for
the sole purpose of programming logic devices manufactured by
Intel and sold by Intel or its authorized distributors. Please
refer to the applicable agreement for further details.
*/
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(parameter
"LPM_AVALUE"
""
"Unsigned value associated with the aset port"
)
(parameter
"LPM_FFTYPE"
"\"DFF\""
"Selects behavior as DFF or TFF"
"\"DFF\"" "\"TFF\""
)
(parameter
"LPM_SVALUE"
""
"Unsigned value associated with the sset port"
)
(parameter
"LPM_WIDTH"
"1"
"Width of I/O, any integer > 0"
" 1" " 2" " 3" " 4" " 5" " 6" " 7" " 8" " 9" "10" "11" "12" "13" "14" "15" "16" "20" "24" "28" "32" "40" "48" "56" "64"
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(junction (pt 664 200))
(junction (pt 664 232))

48
SM.bsf
View file

@ -18,33 +18,47 @@ the sole purpose of programming logic devices manufactured by
Intel and sold by Intel or its authorized distributors. Please Intel and sold by Intel or its authorized distributors. Please
refer to the applicable agreement for further details. refer to the applicable agreement for further details.
*/ */
(header "symbol" (version "1.2")) (header "symbol" (version "1.1"))
(symbol (symbol
(rect 16 16 136 112) (rect 16 16 168 128)
(text "SM" (rect 5 0 23 19)(font "Intel Clear" (font_size 8))) (text "SM" (rect 5 0 19 12)(font "Arial" ))
(text "inst" (rect 8 75 24 92)(font "Intel Clear" )) (text "inst" (rect 8 96 20 108)(font "Arial" ))
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(line (pt 152 64)(pt 136 64)(line_width 1))
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(rectangle (rect 16 16 104 80)) (rectangle (rect 16 16 136 96)(line_width 1))
) )
) )

22
SM.v Normal file
View file

@ -0,0 +1,22 @@
module SM
(
input CLK,
input E2,
output FETCH,
output EXEC1,
output EXEC2
);
reg [2:0]s = 3'b1; //current state initialised to 001
always @(posedge CLK) //Change on rising edge of clock
begin
s[2] <= ~s[2] & s[1] & ~s[0] & E2;
s[1] <= ~s[2] & ~s[1] & s[0];
s[0] <= (~s[2] & s[1] & ~s[0] & ~E2) | (s[2] & ~s[1] & ~s[0]);
end
assign FETCH = s[0];
assign EXEC1 = s[1];
assign EXEC2 = s[2];
endmodule

22
SM.v.bak Normal file
View file

@ -0,0 +1,22 @@
module SM
(
input CLK,
input E2,
output FETCH,
output EXEC1,
output EXEC2
);
reg [2:0]s; //current state
always @(posedge CLK) //Change on rising edge of clock
begin
s[2] <= ~s[2] & s[1] & ~s[0] & E2;
s[1] <= ~s[2] & ~s[1] & s[0];
s[0] <= (~s[2] & s[1] & ~s[0] & ~E2) | (s[2] & ~s[1] & ~s[0]);
end
assign FETCH = s[0];
assign EXEC1 = s[1];
assign EXEC2 = s[2];
endmodule

193
alu.v
View file

@ -1,4 +1,4 @@
module alu (enable, Rd, Rs1, Rs2, opcode, carryin, mulresult, carryout, mul1, mul2, Rout, jump); module alu (enable, Rd, Rs1, Rs2, opcode, carryin, mulresult, exec2, carryout, mul1, mul2, Rout, jump);
input enable; // active LOW, disables the ALU during load/store operations so that undefined behaviour does not occur input enable; // active LOW, disables the ALU during load/store operations so that undefined behaviour does not occur
input signed [15:0] Rd; // input destination register input signed [15:0] Rd; // input destination register
@ -7,6 +7,7 @@ input signed [15:0] Rs2; // input source register 2
input [5:0] opcode; // opcode is fed in from instruction using wires outside ALU input [5:0] opcode; // opcode is fed in from instruction using wires outside ALU
input carryin; // current status of carry flip-flop input carryin; // current status of carry flip-flop
input signed [31:0] mulresult; // 32-bit result from multiplier input signed [31:0] mulresult; // 32-bit result from multiplier
input exec2; // Input from state machine to indicate when to take in result from multiplication
output carryout; // resulting carry from operation, updated each cycle output carryout; // resulting carry from operation, updated each cycle
output reg signed [15:0] mul1; // first number to be multiplied output reg signed [15:0] mul1; // first number to be multiplied
@ -21,7 +22,6 @@ assign Rout = alusum [15:0];
assign carryout = alusum [16]; assign carryout = alusum [16];
assign jump = (alusum[16] && ((opcode[5:2] == 4'b0000) | (opcode[5:2] == 4'b0001) | (opcode[5:2] == 4'b0010))); assign jump = (alusum[16] && ((opcode[5:2] == 4'b0000) | (opcode[5:2] == 4'b0001) | (opcode[5:2] == 4'b0010)));
reg [15:0] mulextra; reg [15:0] mulextra;
reg signed [31:0] mlaresult;
//Jump Conditionals: //Jump Conditionals:
wire JC1, JC2, JC3, JC4, JC5, JC6, JC7, JC8; wire JC1, JC2, JC3, JC4, JC5, JC6, JC7, JC8;
@ -36,100 +36,101 @@ assign JC8 = (Rs1 < 0);
always @(*) always @(*)
begin begin
case (opcode) if(!enable)
6'b000000: alusum = {1'b1, Rd}; // JMP Unconditional Jump, first bit high to indicate jump and passes through Rd begin
case (opcode)
6'b000100: alusum = {JC1, Rd}; // JC1 Conditional Jump A < B 6'b000000: alusum = {1'b1, Rd}; // JMP Unconditional Jump, first bit high to indicate jump and passes through Rd
6'b000101: alusum = {JC2, Rd}; // JC2 Conditional Jump A > B
6'b000110: alusum = {JC3, Rd}; // JC3 Conditional Jump A = B 6'b000100: alusum = {JC1, Rd}; // JC1 Conditional Jump A < B
6'b000111: alusum = {JC4, Rd}; // JC4 Conditional Jump A = 0 6'b000101: alusum = {JC2, Rd}; // JC2 Conditional Jump A > B
6'b000110: alusum = {JC3, Rd}; // JC3 Conditional Jump A = B
6'b001000: alusum = {JC5, Rd}; // JC5 Conditional Jump A >= B / A !< B 6'b000111: alusum = {JC4, Rd}; // JC4 Conditional Jump A = 0
6'b001001: alusum = {JC6, Rd}; // JC6 Conditional Jump A <= B / A !> B
6'b001010: alusum = {JC7, Rd}; // JC7 Conditional Jump A != B 6'b001000: alusum = {JC5, Rd}; // JC5 Conditional Jump A >= B / A !< B
6'b001011: alusum = {JC8, Rd}; // JC8 Conditional Jump A < 0 6'b001001: alusum = {JC6, Rd}; // JC6 Conditional Jump A <= B / A !> B
6'b001010: alusum = {JC7, Rd}; // JC7 Conditional Jump A != B
6'b001100: alusum = {1'b0, Rs1 & Rs2}; // AND Bitwise AND 6'b001011: alusum = {JC8, Rd}; // JC8 Conditional Jump A < 0
6'b001101: alusum = {1'b0, Rs1 | Rs2}; // OR Bitwise OR
6'b001110: alusum = {1'b0, Rs1 ^ Rs2}; // XOR Bitwise XOR 6'b001100: alusum = {1'b0, Rs1 & Rs2}; // AND Bitwise AND
6'b001111: alusum = {1'b0, ~Rs1}; // NOT Bitwise NOT 6'b001101: alusum = {1'b0, Rs1 | Rs2}; // OR Bitwise OR
6'b001110: alusum = {1'b0, Rs1 ^ Rs2}; // XOR Bitwise XOR
6'b010000: alusum = {1'b0, ~Rs1 | ~Rs2}; // NND Bitwise NAND 6'b001111: alusum = {1'b0, ~Rs1}; // NOT Bitwise NOT
6'b010001: alusum = {1'b0, ~Rs1 & ~Rs2}; // NOR Bitwise NOR
6'b010010: alusum = {1'b0, Rs1 ~^ Rs2}; // XNR Bitwise XNOR 6'b010000: alusum = {1'b0, ~Rs1 | ~Rs2}; // NND Bitwise NAND
6'b010011: alusum = {1'b0, Rs1}; // MOV Move (Rd = Rs1) 6'b010001: alusum = {1'b0, ~Rs1 & ~Rs2}; // NOR Bitwise NOR
6'b010010: alusum = {1'b0, Rs1 ~^ Rs2}; // XNR Bitwise XNOR
6'b010100: alusum = {1'b0, Rs1} + {1'b0, Rs2}; // ADD Add (Rd = Rs1 + Rs2) 6'b010011: alusum = {1'b0, Rs1}; // MOV Move (Rd = Rs1)
6'b010101: alusum = {1'b0, Rs1} + {1'b0, Rs2} + carryin; // ADC Add w/ Carry (Rd = Rs1 + Rs2 + C)
6'b010110: alusum = {1'b0, Rs1} + {17'b00000000000000001}; // ADO Add 1 (Rd = Rd + 1) 6'b010100: alusum = {1'b0, Rs1} + {1'b0, Rs2}; // ADD Add (Rd = Rs1 + Rs2)
6'b010111: ; 6'b010101: alusum = {1'b0, Rs1} + {1'b0, Rs2} + carryin; // ADC Add w/ Carry (Rd = Rs1 + Rs2 + C)
6'b010110: alusum = {1'b0, Rs1} + {17'b00000000000000001}; // ADO Add 1 (Rd = Rd + 1)
6'b011000: alusum = {1'b0, Rs1} - {1'b0, Rs2}; // SUB Subtract (Rd = Rs1 - Rs2) 6'b010111: ;
6'b011001: alusum = {1'b0, Rs1} - {1'b0, Rs2} + carryin - {17'b00000000000000001}; // SBC Subtract w/ Carry (Rd = Rs1 - Rs2 + C - 1)
6'b011010: alusum = {1'b0, Rs1} - {17'b00000000000000001}; // SBO Subtract 1 (Rd = Rd - 1) 6'b011000: alusum = {1'b0, Rs1} - {1'b0, Rs2}; // SUB Subtract (Rd = Rs1 - Rs2)
6'b011011: ; 6'b011001: alusum = {1'b0, Rs1} - {1'b0, Rs2} + carryin - {17'b00000000000000001}; // SBC Subtract w/ Carry (Rd = Rs1 - Rs2 + C - 1)
6'b011010: alusum = {1'b0, Rs1} - {17'b00000000000000001}; // SBO Subtract 1 (Rd = Rd - 1)
6'b011100: // MUL Multiply (Rd = Rs1 * Rs2) 6'b011011: ;
begin
// mul1 = Rs1; 6'b011100: // MUL Multiply (Rd = Rs1 * Rs2)
// mul2 = Rs2; begin
alusum[16] = 1'b0; if(!exec2)
{mulextra, alusum[15:0]} = Rs1 * Rs2; begin
end mul1 = Rs1;
6'b011101: // MLA Multiply and Add (Rd = Rs2 + (Rd * Rs1)) mul2 = Rs2;
begin end
// mul1 = Rs1; else
// mul2 = Rs2; begin
alusum[16] = 1'b0; alusum[16] = 1'b0;
{mulextra, alusum[15:0]} = (Rd * Rs1) + Rs2; {mulextra, alusum[15:0]} = mulresult;
end end
6'b011110: // MLS Multiply and Subtract (Rd = Rs2 - (Rd * Rs1)[15:0]) end
begin 6'b011101: // MLA Multiply and Add (Rd = Rs2 + (Rd * Rs1))
// mul1 = Rs1; begin
// mul2 = Rs2; if(!exec2)
alusum = {1'b0, Rs2 - (Rd * Rs1)}; begin
end mul1 = Rs1;
6'b011111: alusum = mulextra; // MRT Retrieve Multiply MSBs (Rd = MSBs) mul2 = Rs2;
end
6'b100000: alusum = {1'b0, Rs1 << Rs2}; // LSL Logical Shift Left (Rd = Rs1 shifted left by value of Rs2) else
6'b100001: alusum = {1'b0, Rs1 >> Rs2}; // LSR Logical Shift Right (Rd = Rs1 shifted right by value of Rs2) begin
6'b100010: alusum = {Rs1[15], Rs1 >>> Rs2}; // ASR Arithmetic Shift Right (Rd = Rs1 shifted right by value of Rs2, maintaining sign bit) alusum[16] = 1'b0;
6'b100011: ; {mulextra, alusum[15:0]} = mulresult + {16'h0000, Rs2};
end
6'b100100: alusum = {1'b0, (Rs1 >> Rs2[3:0]) | (Rs1 << (16 - Rs2[3:0]))}; // ROR Shift Right Loop (Rd = Rs1 shifted right by Rs2, but Rs1[0] -> Rs1[15]) end
6'b100101: alusum = ({Rs1, carryin} >> Rs2[3:0]) | ({Rs1, carryin} << (17 - (Rs2 % 17)));// RRC Shift Right Loop w/ Carry (Rd = Rs1 shifted right by Rs2, but Rs1[0] -> Carry & Carry -> Rs1[15]) 6'b011110: // MLS Multiply and Subtract (Rd = Rs2 - (Rd * Rs1)[15:0])
6'b100110: ; begin
6'b100111: ; if(!exec2)
begin
6'b111110: ; // NOP No Operation (Do Nothing for a cycle) mul1 = Rs1;
6'b111111: ; // STP Stop (Program Ends) mul2 = Rs2;
end
default: ; // During Load & Store as well as undefined opcodes else
endcase; begin
alusum = {1'b0, Rs2 - mulresult[15:0]};
end
end
6'b011111: alusum = mulextra; // MRT Retrieve Multiply MSBs (Rd = MSBs)
6'b100000: alusum = {1'b0, Rs1 << Rs2}; // LSL Logical Shift Left (Rd = Rs1 shifted left by value of Rs2)
6'b100001: alusum = {1'b0, Rs1 >> Rs2}; // LSR Logical Shift Right (Rd = Rs1 shifted right by value of Rs2)
6'b100010: alusum = {Rs1[15], Rs1 >>> Rs2}; // ASR Arithmetic Shift Right (Rd = Rs1 shifted right by value of Rs2, maintaining sign bit)
6'b100011: ;
6'b100100: alusum = {1'b0, (Rs1 >> Rs2[3:0]) | (Rs1 << (16 - Rs2[3:0]))}; // ROR Shift Right Loop (Rd = Rs1 shifted right by Rs2, but Rs1[0] -> Rs1[15])
6'b100101: alusum = ({Rs1, carryin} >> (Rs2 % 17)) | ({Rs1, carryin} << (17 - (Rs2 % 17)));// RRC Shift Right Loop w/ Carry (Rd = Rs1 shifted right by Rs2, but Rs1[0] -> Carry & Carry -> Rs1[15])
6'b100110: ;
6'b100111: ;
6'b111110: ; // NOP No Operation (Do Nothing for a cycle)
6'b111111: alusum = {1'b0, 16'h0000}; // STP Stop (Program Ends)
default: ; // During Load & Store as well as undefined opcodes
endcase;
end
else
begin
alusum = {1'b0, 16'h0000}; // Bring output low during Load/Store so it does not interfere
end
end end
/*
always @(*)
begin
case (opcode)
6'b011100:
begin
alusum = {1'b0, mulresult[15:0]};
mulextra = mulresult[31:16];
end
6'b011101:
begin
mlaresult = mulresult + {16'h0000, Rs2};
alusum = {1'b0, mlaresult[15:0]};
mulextra = mlaresult[31:16];
end
6'b011110:
begin
alusum = {1'b0, Rs2 - mulresult[15:0]};
end
default: ;
endcase
end
*/
endmodule endmodule

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module alu (enable, Rd, Rs1, Rs2, opcode, carryin, mulresult, carryout, mul1, mul2, Rout, jump);
input enable; // active LOW, disables the ALU during load/store operations so that undefined behaviour does not occur
input signed [15:0] Rd; // input destination register
input signed [15:0] Rs1; // input source register 1
input signed [15:0] Rs2; // input source register 2
input [5:0] opcode; // opcode is fed in from instruction using wires outside ALU
input carryin; // current status of carry flip-flop
input signed [31:0] mulresult; // 32-bit result from multiplier
output carryout; // resulting carry from operation, updated each cycle
output reg signed [15:0] mul1; // first number to be multiplied
output reg signed [15:0] mul2; // second number to be multiplied
output signed [15:0] Rout; // value to be saved to destination register
output jump; // tells decoder whether Jump condition is true
// load and store are handled outside the ALU so those opcodes can be ignored. All other instructions have a consistent format.
reg signed [16:0] alusum; // extra bit to hold carry from operations other than Multiply
assign Rout = alusum [15:0];
assign carryout = alusum [16];
assign jump = (alusum[16] && ((opcode[5:2] == 4'b0000) | (opcode[5:2] == 4'b0001) | (opcode[5:2] == 4'b0010)));
reg [15:0] mulextra;
reg signed [31:0] mlaresult;
//Jump Conditionals:
wire JC1, JC2, JC3, JC4, JC5, JC6, JC7, JC8;
assign JC1 = (Rs1 < Rs2);
assign JC2 = (Rs1 > Rs2);
assign JC3 = (Rs1 == Rs2);
assign JC4 = (Rs1 == 0);
assign JC5 = (Rs1 >= Rs2);
assign JC6 = (Rs1 <= Rs2);
assign JC7 = (Rs1 != Rs2);
assign JC8 = (Rs1 < 0);
always @(*)
begin
if(!enable)
begin
case (opcode)
6'b000000: alusum = {1'b1, Rd}; // JMP Unconditional Jump, first bit high to indicate jump and passes through Rd
6'b000100: alusum = {JC1, Rd}; // JC1 Conditional Jump A < B
6'b000101: alusum = {JC2, Rd}; // JC2 Conditional Jump A > B
6'b000110: alusum = {JC3, Rd}; // JC3 Conditional Jump A = B
6'b000111: alusum = {JC4, Rd}; // JC4 Conditional Jump A = 0
6'b001000: alusum = {JC5, Rd}; // JC5 Conditional Jump A >= B / A !< B
6'b001001: alusum = {JC6, Rd}; // JC6 Conditional Jump A <= B / A !> B
6'b001010: alusum = {JC7, Rd}; // JC7 Conditional Jump A != B
6'b001011: alusum = {JC8, Rd}; // JC8 Conditional Jump A < 0
6'b001100: alusum = {1'b0, Rs1 & Rs2}; // AND Bitwise AND
6'b001101: alusum = {1'b0, Rs1 | Rs2}; // OR Bitwise OR
6'b001110: alusum = {1'b0, Rs1 ^ Rs2}; // XOR Bitwise XOR
6'b001111: alusum = {1'b0, ~Rs1}; // NOT Bitwise NOT
6'b010000: alusum = {1'b0, ~Rs1 | ~Rs2}; // NND Bitwise NAND
6'b010001: alusum = {1'b0, ~Rs1 & ~Rs2}; // NOR Bitwise NOR
6'b010010: alusum = {1'b0, Rs1 ~^ Rs2}; // XNR Bitwise XNOR
6'b010011: alusum = {1'b0, Rs1}; // MOV Move (Rd = Rs1)
6'b010100: alusum = {1'b0, Rs1} + {1'b0, Rs2}; // ADD Add (Rd = Rs1 + Rs2)
6'b010101: alusum = {1'b0, Rs1} + {1'b0, Rs2} + carryin; // ADC Add w/ Carry (Rd = Rs1 + Rs2 + C)
6'b010110: alusum = {1'b0, Rs1} + {17'b00000000000000001}; // ADO Add 1 (Rd = Rd + 1)
6'b010111: ;
6'b011000: alusum = {1'b0, Rs1} - {1'b0, Rs2}; // SUB Subtract (Rd = Rs1 - Rs2)
6'b011001: alusum = {1'b0, Rs1} - {1'b0, Rs2} + carryin - {17'b00000000000000001}; // SBC Subtract w/ Carry (Rd = Rs1 - Rs2 + C - 1)
6'b011010: alusum = {1'b0, Rs1} - {17'b00000000000000001}; // SBO Subtract 1 (Rd = Rd - 1)
6'b011011: ;
6'b011100: // MUL Multiply (Rd = Rs1 * Rs2)
begin
// mul1 = Rs1;
// mul2 = Rs2;
alusum[16] = 1'b0;
{mulextra, alusum[15:0]} = Rs1 * Rs2;
end
6'b011101: // MLA Multiply and Add (Rd = Rs2 + (Rd * Rs1))
begin
// mul1 = Rs1;
// mul2 = Rs2;
alusum[16] = 1'b0;
{mulextra, alusum[15:0]} = (Rd * Rs1) + Rs2;
end
6'b011110: // MLS Multiply and Subtract (Rd = Rs2 - (Rd * Rs1)[15:0])
begin
// mul1 = Rs1;
// mul2 = Rs2;
alusum = {1'b0, Rs2 - (Rd * Rs1)};
end
6'b011111: alusum = mulextra; // MRT Retrieve Multiply MSBs (Rd = MSBs)
6'b100000: alusum = {1'b0, Rs1 << Rs2}; // LSL Logical Shift Left (Rd = Rs1 shifted left by value of Rs2)
6'b100001: alusum = {1'b0, Rs1 >> Rs2}; // LSR Logical Shift Right (Rd = Rs1 shifted right by value of Rs2)
6'b100010: alusum = {Rs1[15], Rs1 >>> Rs2}; // ASR Arithmetic Shift Right (Rd = Rs1 shifted right by value of Rs2, maintaining sign bit)
6'b100011: ;
6'b100100: alusum = {1'b0, (Rs1 >> Rs2[3:0]) | (Rs1 << (16 - Rs2[3:0]))}; // ROR Shift Right Loop (Rd = Rs1 shifted right by Rs2, but Rs1[0] -> Rs1[15])
6'b100101: alusum = ({Rs1, carryin} >> (Rs2 % 17)) | ({Rs1, carryin} << (17 - (Rs2 % 17)));// RRC Shift Right Loop w/ Carry (Rd = Rs1 shifted right by Rs2, but Rs1[0] -> Carry & Carry -> Rs1[15])
6'b100110: ;
6'b100111: ;
6'b111110: ; // NOP No Operation (Do Nothing for a cycle)
6'b111111: ; // STP Stop (Program Ends)
default: ; // During Load & Store as well as undefined opcodes
endcase;
end
else
begin
alusum = {1'b0, 16'h0000}; // Bring output low during Load/Store so it does not interfere
end
end
/*
always @(*)
begin
case (opcode)
6'b011100:
begin
alusum = {1'b0, mulresult[15:0]};
mulextra = mulresult[31:16];
end
6'b011101:
begin
mlaresult = mulresult + {16'h0000, Rs2};
alusum = {1'b0, mlaresult[15:0]};
mulextra = mlaresult[31:16];
end
6'b011110:
begin
alusum = {1'b0, Rs2 - mulresult[15:0]};
end
default: ;
endcase
end
*/
endmodule