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Merge branch 'main' into hazards

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This commit is contained in:
Ross Thompson 2022-12-15 08:44:59 -06:00
commit 0358a8d255
28 changed files with 178 additions and 158 deletions
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1
pipelined/config/buildroot/wally-config.vh
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@ -72,6 +72,7 @@
// Integer Divider Configuration // Integer Divider Configuration
// DIV_BITSPERCYCLE must be 1, 2, or 4 // DIV_BITSPERCYCLE must be 1, 2, or 4
`define DIV_BITSPERCYCLE 4 `define DIV_BITSPERCYCLE 4
`define IDIV_ON_FPU 0
// Legal number of PMP entries are 0, 16, or 64 // Legal number of PMP entries are 0, 16, or 64
`define PMP_ENTRIES 16 `define PMP_ENTRIES 16

1
pipelined/config/fpga/wally-config.vh
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@ -74,6 +74,7 @@
// Integer Divider Configuration // Integer Divider Configuration
// DIV_BITSPERCYCLE must be 1, 2, or 4 // DIV_BITSPERCYCLE must be 1, 2, or 4
`define DIV_BITSPERCYCLE 4 `define DIV_BITSPERCYCLE 4
`define IDIV_ON_FPU 0
// Legal number of PMP entries are 0, 16, or 64 // Legal number of PMP entries are 0, 16, or 64
`define PMP_ENTRIES 64 `define PMP_ENTRIES 64

1
pipelined/config/rv32e/wally-config.vh
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@ -73,6 +73,7 @@
// Integer Divider Configuration // Integer Divider Configuration
// DIV_BITSPERCYCLE must be 1, 2, or 4 // DIV_BITSPERCYCLE must be 1, 2, or 4
`define DIV_BITSPERCYCLE 1 `define DIV_BITSPERCYCLE 1
`define IDIV_ON_FPU 0
// Legal number of PMP entries are 0, 16, or 64 // Legal number of PMP entries are 0, 16, or 64
`define PMP_ENTRIES 0 `define PMP_ENTRIES 0

1
pipelined/config/rv32gc/wally-config.vh
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@ -72,6 +72,7 @@
// Integer Divider Configuration // Integer Divider Configuration
// DIV_BITSPERCYCLE must be 1, 2, or 4 // DIV_BITSPERCYCLE must be 1, 2, or 4
`define DIV_BITSPERCYCLE 4 `define DIV_BITSPERCYCLE 4
`define IDIV_ON_FPU 0
// Legal number of PMP entries are 0, 16, or 64 // Legal number of PMP entries are 0, 16, or 64
`define PMP_ENTRIES 64 `define PMP_ENTRIES 64

1
pipelined/config/rv32i/wally-config.vh
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@ -73,6 +73,7 @@
// Integer Divider Configuration // Integer Divider Configuration
// DIV_BITSPERCYCLE must be 1, 2, or 4 // DIV_BITSPERCYCLE must be 1, 2, or 4
`define DIV_BITSPERCYCLE 4 `define DIV_BITSPERCYCLE 4
`define IDIV_ON_FPU 0
// Legal number of PMP entries are 0, 16, or 64 // Legal number of PMP entries are 0, 16, or 64
`define PMP_ENTRIES 64 `define PMP_ENTRIES 64

1
pipelined/config/rv32ic/wally-config.vh
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@ -72,6 +72,7 @@
// Integer Divider Configuration // Integer Divider Configuration
// DIV_BITSPERCYCLE must be 1, 2, or 4 // DIV_BITSPERCYCLE must be 1, 2, or 4
`define DIV_BITSPERCYCLE 4 `define DIV_BITSPERCYCLE 4
`define IDIV_ON_FPU 0
// Legal number of PMP entries are 0, 16, or 64 // Legal number of PMP entries are 0, 16, or 64
`define PMP_ENTRIES 0 `define PMP_ENTRIES 0

1
pipelined/config/rv64BP/wally-config.vh
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@ -76,6 +76,7 @@
// Integer Divider Configuration // Integer Divider Configuration
// DIV_BITSPERCYCLE must be 1, 2, or 4 // DIV_BITSPERCYCLE must be 1, 2, or 4
`define DIV_BITSPERCYCLE 4 `define DIV_BITSPERCYCLE 4
`define IDIV_ON_FPU 0
// Address space // Address space
`define RESET_VECTOR 64'h0000000000001000 `define RESET_VECTOR 64'h0000000000001000

1
pipelined/config/rv64fpquad/wally-config.vh
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@ -74,6 +74,7 @@
// Integer Divider Configuration // Integer Divider Configuration
// DIV_BITSPERCYCLE must be 1, 2, or 4 // DIV_BITSPERCYCLE must be 1, 2, or 4
`define DIV_BITSPERCYCLE 4 `define DIV_BITSPERCYCLE 4
`define IDIV_ON_FPU 0
// Legal number of PMP entries are 0, 16, or 64 // Legal number of PMP entries are 0, 16, or 64
`define PMP_ENTRIES 64 `define PMP_ENTRIES 64

1
pipelined/config/rv64gc/wally-config.vh
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@ -74,6 +74,7 @@
// Integer Divider Configuration // Integer Divider Configuration
// DIV_BITSPERCYCLE must be 1, 2, or 4 // DIV_BITSPERCYCLE must be 1, 2, or 4
`define DIV_BITSPERCYCLE 4 `define DIV_BITSPERCYCLE 4
`define IDIV_ON_FPU 0
// Legal number of PMP entries are 0, 16, or 64 // Legal number of PMP entries are 0, 16, or 64
`define PMP_ENTRIES 64 `define PMP_ENTRIES 64

1
pipelined/config/rv64i/wally-config.vh
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@ -74,6 +74,7 @@
// Integer Divider Configuration // Integer Divider Configuration
// DIV_BITSPERCYCLE must be 1, 2, or 4 // DIV_BITSPERCYCLE must be 1, 2, or 4
`define DIV_BITSPERCYCLE 4 `define DIV_BITSPERCYCLE 4
`define IDIV_ON_FPU 0
// Legal number of PMP entries are 0, 16, or 64 // Legal number of PMP entries are 0, 16, or 64
`define PMP_ENTRIES 0 `define PMP_ENTRIES 0

19
pipelined/src/cache/cache.sv vendored
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@ -94,14 +94,14 @@ module cache #(parameter LINELEN, NUMLINES, NUMWAYS, LOGBWPL, WORDLEN, MUXINTE
logic [NUMWAYS-1:0] NextFlushWay; logic [NUMWAYS-1:0] NextFlushWay;
logic FlushWayCntEn; logic FlushWayCntEn;
logic FlushWayCntRst; logic FlushWayCntRst;
logic SelEvict; logic SelWriteback;
logic LRUWriteEn; logic LRUWriteEn;
logic SelFlush; logic SelFlush;
logic ResetOrFlushAdr, ResetOrFlushWay; logic ResetOrFlushAdr, ResetOrFlushWay;
logic [LINELEN-1:0] ReadDataLine, ReadDataLineCache; logic [LINELEN-1:0] ReadDataLine, ReadDataLineCache;
logic [$clog2(LINELEN/8) - $clog2(MUXINTERVAL/8) - 1:0] WordOffsetAddr; logic [$clog2(LINELEN/8) - $clog2(MUXINTERVAL/8) - 1:0] WordOffsetAddr;
logic SelFetchBuffer; logic SelFetchBuffer;
logic ce; logic CacheEn;
localparam LOGLLENBYTES = $clog2(WORDLEN/8); localparam LOGLLENBYTES = $clog2(WORDLEN/8);
localparam CACHEWORDSPERLINE = `DCACHE_LINELENINBITS/WORDLEN; localparam CACHEWORDSPERLINE = `DCACHE_LINELENINBITS/WORDLEN;
@ -124,12 +124,12 @@ module cache #(parameter LINELEN, NUMLINES, NUMWAYS, LOGBWPL, WORDLEN, MUXINTE
// Array of cache ways, along with victim, hit, dirty, and read merging logic // Array of cache ways, along with victim, hit, dirty, and read merging logic
cacheway #(NUMLINES, LINELEN, TAGLEN, OFFSETLEN, SETLEN, DCACHE) cacheway #(NUMLINES, LINELEN, TAGLEN, OFFSETLEN, SETLEN, DCACHE)
CacheWays[NUMWAYS-1:0](.clk, .reset, .ce, .CAdr, .PAdr, .LineWriteData, .LineByteMask, CacheWays[NUMWAYS-1:0](.clk, .reset, .CacheEn, .CAdr, .PAdr, .LineWriteData, .LineByteMask,
.SetValid, .ClearValid, .SetDirty, .ClearDirty, .SelEvict, .VictimWay, .SetValid, .ClearValid, .SetDirty, .ClearDirty, .SelWriteback, .VictimWay,
.FlushWay, .SelFlush, .ReadDataLineWay, .HitWay, .ValidWay, .DirtyWay, .TagWay, .FlushStage, .InvalidateCache); .FlushWay, .SelFlush, .ReadDataLineWay, .HitWay, .ValidWay, .DirtyWay, .TagWay, .FlushStage, .InvalidateCache);
if(NUMWAYS > 1) begin:vict if(NUMWAYS > 1) begin:vict
cacheLRU #(NUMWAYS, SETLEN, OFFSETLEN, NUMLINES) cacheLRU( cacheLRU #(NUMWAYS, SETLEN, OFFSETLEN, NUMLINES) cacheLRU(
.clk, .reset, .ce, .FlushStage, .HitWay, .ValidWay, .VictimWay, .CAdr, .LRUWriteEn(LRUWriteEn & ~FlushStage), .clk, .reset, .CacheEn, .FlushStage, .HitWay, .ValidWay, .VictimWay, .CAdr, .LRUWriteEn(LRUWriteEn & ~FlushStage),
.SetValid, .PAdr(PAdr[SETTOP-1:OFFSETLEN]), .InvalidateCache, .FlushCache); .SetValid, .PAdr(PAdr[SETTOP-1:OFFSETLEN]), .InvalidateCache, .FlushCache);
end else assign VictimWay = 1'b1; // one hot. end else assign VictimWay = 1'b1; // one hot.
assign CacheHit = | HitWay; assign CacheHit = | HitWay;
@ -163,7 +163,8 @@ module cache #(parameter LINELEN, NUMLINES, NUMWAYS, LOGBWPL, WORDLEN, MUXINTE
end end
assign FetchBufferByteSel = SetValid & ~SetDirty ? '1 : ~DemuxedByteMask; // If load miss set all muxes to 1. assign FetchBufferByteSel = SetValid & ~SetDirty ? '1 : ~DemuxedByteMask; // If load miss set all muxes to 1.
assign LineByteMask = ~SetValid & ~SetDirty ? '0 : ~SetValid & SetDirty ? DemuxedByteMask : '1; // if store hit only enable the word and subword bytes, else write all bytes. logic [LINELEN/8-1:0] LineByteMask2;
assign LineByteMask = SetValid ? '1 : SetDirty ? DemuxedByteMask : '0;
for(index = 0; index < LINELEN/8; index++) begin for(index = 0; index < LINELEN/8; index++) begin
mux2 #(8) WriteDataMux(.d0(CacheWriteData[(8*index)%WORDLEN+7:(8*index)%WORDLEN]), mux2 #(8) WriteDataMux(.d0(CacheWriteData[(8*index)%WORDLEN+7:(8*index)%WORDLEN]),
@ -173,7 +174,7 @@ module cache #(parameter LINELEN, NUMLINES, NUMWAYS, LOGBWPL, WORDLEN, MUXINTE
mux3 #(`PA_BITS) CacheBusAdrMux(.d0({PAdr[`PA_BITS-1:OFFSETLEN], {OFFSETLEN{1'b0}}}), mux3 #(`PA_BITS) CacheBusAdrMux(.d0({PAdr[`PA_BITS-1:OFFSETLEN], {OFFSETLEN{1'b0}}}),
.d1({Tag, PAdr[SETTOP-1:OFFSETLEN], {OFFSETLEN{1'b0}}}), .d1({Tag, PAdr[SETTOP-1:OFFSETLEN], {OFFSETLEN{1'b0}}}),
.d2({Tag, FlushAdr, {OFFSETLEN{1'b0}}}), .d2({Tag, FlushAdr, {OFFSETLEN{1'b0}}}),
.s({SelFlush, SelEvict}), .y(CacheBusAdr)); .s({SelFlush, SelWriteback}), .y(CacheBusAdr));
///////////////////////////////////////////////////////////////////////////////////////////// /////////////////////////////////////////////////////////////////////////////////////////////
// Flush address and way generation during flush // Flush address and way generation during flush
@ -198,10 +199,10 @@ module cache #(parameter LINELEN, NUMLINES, NUMWAYS, LOGBWPL, WORDLEN, MUXINTE
.CacheHit, .LineDirty, .CacheStall, .CacheCommitted, .CacheHit, .LineDirty, .CacheStall, .CacheCommitted,
.CacheMiss, .CacheAccess, .SelAdr, .CacheMiss, .CacheAccess, .SelAdr,
.ClearValid, .ClearDirty, .SetDirty, .ClearValid, .ClearDirty, .SetDirty,
.SetValid, .SelEvict, .SelFlush, .SetValid, .SelWriteback, .SelFlush,
.FlushAdrCntEn, .FlushWayCntEn, .FlushAdrCntRst, .FlushAdrCntEn, .FlushWayCntEn, .FlushAdrCntRst,
.FlushWayCntRst, .FlushAdrFlag, .FlushWayFlag, .FlushCache, .SelFetchBuffer, .FlushWayCntRst, .FlushAdrFlag, .FlushWayFlag, .FlushCache, .SelFetchBuffer,
.InvalidateCache, .InvalidateCache,
.ce, .CacheEn,
.LRUWriteEn); .LRUWriteEn);
endmodule endmodule

4
pipelined/src/cache/cacheLRU.sv vendored
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@ -32,7 +32,7 @@
module cacheLRU module cacheLRU
#(parameter NUMWAYS = 4, SETLEN = 9, OFFSETLEN = 5, NUMLINES = 128)( #(parameter NUMWAYS = 4, SETLEN = 9, OFFSETLEN = 5, NUMLINES = 128)(
input logic clk, reset, ce, FlushStage, input logic clk, reset, CacheEn, FlushStage,
input logic [NUMWAYS-1:0] HitWay, input logic [NUMWAYS-1:0] HitWay,
input logic [NUMWAYS-1:0] ValidWay, input logic [NUMWAYS-1:0] ValidWay,
output logic [NUMWAYS-1:0] VictimWay, output logic [NUMWAYS-1:0] VictimWay,
@ -120,7 +120,7 @@ module cacheLRU
// LRU storage must be reset for modelsim to run. However the reset value does not actually matter in practice. // LRU storage must be reset for modelsim to run. However the reset value does not actually matter in practice.
always_ff @(posedge clk) begin always_ff @(posedge clk) begin
if (reset) for (int set = 0; set < NUMLINES; set++) LRUMemory[set] <= '0; if (reset) for (int set = 0; set < NUMLINES; set++) LRUMemory[set] <= '0;
if(ce) begin if(CacheEn) begin
if((InvalidateCache | FlushCache) & ~FlushStage) for (int set = 0; set < NUMLINES; set++) LRUMemory[set] <= '0; if((InvalidateCache | FlushCache) & ~FlushStage) for (int set = 0; set < NUMLINES; set++) LRUMemory[set] <= '0;
else if (LRUWriteEn & ~FlushStage) begin else if (LRUWriteEn & ~FlushStage) begin
LRUMemory[CAdr] <= NextLRU; ///***** RT: This is not right. Logically should be PAdr, but it breaks linux. LRUMemory[CAdr] <= NextLRU; ///***** RT: This is not right. Logically should be PAdr, but it breaks linux.

8
pipelined/src/cache/cachefsm.sv vendored
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@ -64,7 +64,7 @@ module cachefsm
output logic ClearDirty, output logic ClearDirty,
output logic SetDirty, output logic SetDirty,
output logic SetValid, output logic SetValid,
output logic SelEvict, output logic SelWriteback,
output logic LRUWriteEn, output logic LRUWriteEn,
output logic SelFlush, output logic SelFlush,
output logic FlushAdrCntEn, output logic FlushAdrCntEn,
@ -72,7 +72,7 @@ module cachefsm
output logic FlushAdrCntRst, output logic FlushAdrCntRst,
output logic FlushWayCntRst, output logic FlushWayCntRst,
output logic SelFetchBuffer, output logic SelFetchBuffer,
output logic ce); output logic CacheEn);
logic resetDelay; logic resetDelay;
logic AMO, StoreAMO; logic AMO, StoreAMO;
@ -170,7 +170,7 @@ module cachefsm
assign LRUWriteEn = (CurrState == STATE_READY & AnyHit) | assign LRUWriteEn = (CurrState == STATE_READY & AnyHit) |
(CurrState == STATE_MISS_WRITE_CACHE_LINE); (CurrState == STATE_MISS_WRITE_CACHE_LINE);
// Flush and eviction controls // Flush and eviction controls
assign SelEvict = (CurrState == STATE_MISS_EVICT_DIRTY & ~CacheBusAck) | assign SelWriteback = (CurrState == STATE_MISS_EVICT_DIRTY & ~CacheBusAck) |
(CurrState == STATE_READY & AnyMiss & LineDirty); (CurrState == STATE_READY & AnyMiss & LineDirty);
assign SelFlush = (CurrState == STATE_FLUSH) | (CurrState == STATE_FLUSH_CHECK) | assign SelFlush = (CurrState == STATE_FLUSH) | (CurrState == STATE_FLUSH_CHECK) |
(CurrState == STATE_FLUSH_INCR) | (CurrState == STATE_FLUSH_WRITE_BACK); (CurrState == STATE_FLUSH_INCR) | (CurrState == STATE_FLUSH_WRITE_BACK);
@ -201,6 +201,6 @@ module cachefsm
resetDelay; resetDelay;
assign SelFetchBuffer = CurrState == STATE_MISS_WRITE_CACHE_LINE | CurrState == STATE_MISS_READ_DELAY; assign SelFetchBuffer = CurrState == STATE_MISS_WRITE_CACHE_LINE | CurrState == STATE_MISS_READ_DELAY;
assign ce = (CurrState == STATE_READY & ~Stall | CacheStall) | (CurrState != STATE_READY) | reset; assign CacheEn = (CurrState == STATE_READY & ~Stall | CacheStall) | (CurrState != STATE_READY) | reset;
endmodule // cachefsm endmodule // cachefsm

35
pipelined/src/cache/cacheway.sv vendored
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@ -33,7 +33,7 @@
module cacheway #(parameter NUMLINES=512, parameter LINELEN = 256, TAGLEN = 26, module cacheway #(parameter NUMLINES=512, parameter LINELEN = 256, TAGLEN = 26,
parameter OFFSETLEN = 5, parameter INDEXLEN = 9, parameter DIRTY_BITS = 1) ( parameter OFFSETLEN = 5, parameter INDEXLEN = 9, parameter DIRTY_BITS = 1) (
input logic clk, input logic clk,
input logic ce, input logic CacheEn,
input logic reset, input logic reset,
input logic [$clog2(NUMLINES)-1:0] CAdr, input logic [$clog2(NUMLINES)-1:0] CAdr,
input logic [`PA_BITS-1:0] PAdr, input logic [`PA_BITS-1:0] PAdr,
@ -42,7 +42,7 @@ module cacheway #(parameter NUMLINES=512, parameter LINELEN = 256, TAGLEN = 26,
input logic ClearValid, input logic ClearValid,
input logic SetDirty, input logic SetDirty,
input logic ClearDirty, input logic ClearDirty,
input logic SelEvict, input logic SelWriteback,
input logic SelFlush, input logic SelFlush,
input logic VictimWay, input logic VictimWay,
input logic FlushWay, input logic FlushWay,
@ -76,8 +76,7 @@ module cacheway #(parameter NUMLINES=512, parameter LINELEN = 256, TAGLEN = 26,
logic ClearValidWay; logic ClearValidWay;
logic SetDirtyWay; logic SetDirtyWay;
logic ClearDirtyWay; logic ClearDirtyWay;
logic SelectedWay; logic SelNonHit;
logic SelWriteback;
logic SelData; logic SelData;
logic FlushWayEn, VictimWayEn; logic FlushWayEn, VictimWayEn;
@ -85,28 +84,28 @@ module cacheway #(parameter NUMLINES=512, parameter LINELEN = 256, TAGLEN = 26,
// FlushWay and VictimWay are part of a one hot way selection. Must clear them if FlushWay not selected // FlushWay and VictimWay are part of a one hot way selection. Must clear them if FlushWay not selected
// or VictimWay not selected. // or VictimWay not selected.
assign FlushWayEn = FlushWay & SelFlush; assign FlushWayEn = FlushWay & SelFlush;
assign VictimWayEn = VictimWay & SelEvict; assign VictimWayEn = VictimWay & SelWriteback;
assign SelWriteback = FlushWayEn | SetValid | SelEvict; assign SelNonHit = FlushWayEn | SetValid | SelWriteback;
mux2 #(1) seltagmux(VictimWay, FlushWay, SelFlush, SelTag); mux2 #(1) seltagmux(VictimWay, FlushWay, SelFlush, SelTag);
//assign SelTag = VictimWay | FlushWay; //assign SelTag = VictimWay | FlushWay;
assign SelData = HitWay | FlushWayEn | VictimWayEn; //assign SelData = HitWay | FlushWayEn | VictimWayEn;
mux2 #(1) selectedwaymux(HitWay, SelTag, SelWriteback , SelectedWay); mux2 #(1) selectedwaymux(HitWay, SelTag, SelNonHit , SelData);
///////////////////////////////////////////////////////////////////////////////////////////// /////////////////////////////////////////////////////////////////////////////////////////////
// Write Enable demux // Write Enable demux
///////////////////////////////////////////////////////////////////////////////////////////// /////////////////////////////////////////////////////////////////////////////////////////////
// RT: Can we merge these two muxes? This is also shared in cacheLRU. // RT: Can we merge these two muxes? This is also shared in cacheLRU.
//mux3 #(1) selectwaymux(HitWay, VictimWay, FlushWay, {SelFlush, SetValid}, SelectedWay); //mux3 #(1) selectwaymux(HitWay, VictimWay, FlushWay, {SelFlush, SetValid}, SelData);
//mux3 #(1) selecteddatamux(HitWay, VictimWay, FlushWay, {SelFlush, SelEvict}, SelData); //mux3 #(1) selecteddatamux(HitWay, VictimWay, FlushWay, {SelFlush, SelNonHit}, SelData);
assign SetValidWay = SetValid & SelectedWay; assign SetValidWay = SetValid & SelData;
assign ClearValidWay = ClearValid & SelectedWay; assign ClearValidWay = ClearValid & SelData;
assign SetDirtyWay = SetDirty & SelectedWay; assign SetDirtyWay = SetDirty & SelData;
assign ClearDirtyWay = ClearDirty & SelectedWay; assign ClearDirtyWay = ClearDirty & SelData;
// If writing the whole line set all write enables to 1, else only set the correct word. // If writing the whole line set all write enables to 1, else only set the correct word.
assign SelectedWriteWordEn = (SetValidWay | SetDirtyWay) & ~FlushStage; assign SelectedWriteWordEn = (SetValidWay | SetDirtyWay) & ~FlushStage;
@ -117,7 +116,7 @@ module cacheway #(parameter NUMLINES=512, parameter LINELEN = 256, TAGLEN = 26,
// Tag Array // Tag Array
///////////////////////////////////////////////////////////////////////////////////////////// /////////////////////////////////////////////////////////////////////////////////////////////
sram1p1rw #(.DEPTH(NUMLINES), .WIDTH(TAGLEN)) CacheTagMem(.clk, .ce, sram1p1rw #(.DEPTH(NUMLINES), .WIDTH(TAGLEN)) CacheTagMem(.clk, .ce(CacheEn),
.addr(CAdr), .dout(ReadTag), .bwe('1), .addr(CAdr), .dout(ReadTag), .bwe('1),
.din(PAdr[`PA_BITS-1:OFFSETLEN+INDEXLEN]), .we(SetValidEN)); .din(PAdr[`PA_BITS-1:OFFSETLEN+INDEXLEN]), .we(SetValidEN));
@ -140,7 +139,7 @@ module cacheway #(parameter NUMLINES=512, parameter LINELEN = 256, TAGLEN = 26,
localparam integer LOGNUMSRAM = $clog2(NUMSRAM); localparam integer LOGNUMSRAM = $clog2(NUMSRAM);
for(words = 0; words < NUMSRAM; words++) begin: word for(words = 0; words < NUMSRAM; words++) begin: word
sram1p1rw #(.DEPTH(NUMLINES), .WIDTH(SRAMLEN)) CacheDataMem(.clk, .ce, .addr(CAdr), sram1p1rw #(.DEPTH(NUMLINES), .WIDTH(SRAMLEN)) CacheDataMem(.clk, .ce(CacheEn), .addr(CAdr),
.dout(ReadDataLine[SRAMLEN*(words+1)-1:SRAMLEN*words]), .dout(ReadDataLine[SRAMLEN*(words+1)-1:SRAMLEN*words]),
.din(LineWriteData[SRAMLEN*(words+1)-1:SRAMLEN*words]), .din(LineWriteData[SRAMLEN*(words+1)-1:SRAMLEN*words]),
.we(SelectedWriteWordEn), .bwe(FinalByteMask[SRAMLENINBYTES*(words+1)-1:SRAMLENINBYTES*words])); .we(SelectedWriteWordEn), .bwe(FinalByteMask[SRAMLENINBYTES*(words+1)-1:SRAMLENINBYTES*words]));
@ -155,7 +154,7 @@ module cacheway #(parameter NUMLINES=512, parameter LINELEN = 256, TAGLEN = 26,
always_ff @(posedge clk) begin // Valid bit array, always_ff @(posedge clk) begin // Valid bit array,
if (reset) ValidBits <= #1 '0; if (reset) ValidBits <= #1 '0;
if(ce) begin if(CacheEn) begin
ValidWay <= #1 ValidBits[CAdr]; ValidWay <= #1 ValidBits[CAdr];
if(InvalidateCache & ~FlushStage) ValidBits <= #1 '0; if(InvalidateCache & ~FlushStage) ValidBits <= #1 '0;
else if (SetValidEN | (ClearValidWay & ~FlushStage)) ValidBits[CAdr] <= #1 SetValidWay; else if (SetValidEN | (ClearValidWay & ~FlushStage)) ValidBits[CAdr] <= #1 SetValidWay;
@ -171,7 +170,7 @@ module cacheway #(parameter NUMLINES=512, parameter LINELEN = 256, TAGLEN = 26,
always_ff @(posedge clk) begin always_ff @(posedge clk) begin
// reset is optional. Consider merging with TAG array in the future. // reset is optional. Consider merging with TAG array in the future.
//if (reset) DirtyBits <= #1 {NUMLINES{1'b0}}; //if (reset) DirtyBits <= #1 {NUMLINES{1'b0}};
if(ce) begin if(CacheEn) begin
Dirty <= #1 DirtyBits[CAdr]; Dirty <= #1 DirtyBits[CAdr];
if((SetDirtyWay | ClearDirtyWay) & ~FlushStage) DirtyBits[CAdr] <= #1 SetDirtyWay; if((SetDirtyWay | ClearDirtyWay) & ~FlushStage) DirtyBits[CAdr] <= #1 SetDirtyWay;
end end

17
pipelined/src/fpu/fdivsqrt/fdivsqrt.sv
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@ -52,15 +52,16 @@ module fdivsqrt(
output logic FDivBusyE, IFDivStartE, FDivDoneE, output logic FDivBusyE, IFDivStartE, FDivDoneE,
// output logic DivDone, // output logic DivDone,
output logic [`NE+1:0] QeM, output logic [`NE+1:0] QeM,
output logic [`DIVb:0] QmM output logic [`DIVb:0] QmM,
output logic [`XLEN-1:0] FPIntDivResultM
// output logic [`XLEN-1:0] RemM, // output logic [`XLEN-1:0] RemM,
); );
logic [`DIVb+3:0] WS, WC; logic [`DIVb+3:0] WS, WC;
logic [`DIVb+3:0] X; logic [`DIVb+3:0] X;
logic [`DIVN-2:0] D; // U0.N-1 logic [`DIVb-1:0] D;
logic [`DIVN-2:0] Dpreproc; logic [`DIVb-1:0] DPreproc;
logic [`DIVb:0] FirstU, FirstUM; logic [`DIVb:0] FirstU, FirstUM;
logic [`DIVb+1:0] FirstC; logic [`DIVb+1:0] FirstC;
logic Firstun; logic Firstun;
logic WZero; logic WZero;
@ -71,7 +72,7 @@ module fdivsqrt(
fdivsqrtpreproc fdivsqrtpreproc( fdivsqrtpreproc fdivsqrtpreproc(
.clk, .IFDivStartE, .Xm(XmE), .QeM, .Xe(XeE), .Fmt(FmtE), .Ye(YeE), .clk, .IFDivStartE, .Xm(XmE), .QeM, .Xe(XeE), .Fmt(FmtE), .Ye(YeE),
.Sqrt(SqrtE), .Ym(YmE), .XZero(XZeroE), .X, .Dpreproc, .Sqrt(SqrtE), .Ym(YmE), .XZero(XZeroE), .X, .DPreproc,
.n, .m, .OTFCSwap, .ALTBM, .BZero, .As, .n, .m, .OTFCSwap, .ALTBM, .BZero, .As,
.ForwardedSrcAE, .ForwardedSrcBE, .Funct3E, .Funct3M, .MDUE, .W64E); .ForwardedSrcAE, .ForwardedSrcBE, .Funct3E, .Funct3M, .MDUE, .W64E);
fdivsqrtfsm fdivsqrtfsm( fdivsqrtfsm fdivsqrtfsm(
@ -81,12 +82,12 @@ module fdivsqrt(
.XInfE, .YInfE, .WZero, .SpecialCaseM); .XInfE, .YInfE, .WZero, .SpecialCaseM);
fdivsqrtiter fdivsqrtiter( fdivsqrtiter fdivsqrtiter(
.clk, .Firstun, .D, .FirstU, .FirstUM, .FirstC, .SqrtE, // .SqrtM, .clk, .Firstun, .D, .FirstU, .FirstUM, .FirstC, .SqrtE, // .SqrtM,
.X,.Dpreproc, .FirstWS(WS), .FirstWC(WC), .X,.DPreproc, .FirstWS(WS), .FirstWC(WC),
.IFDivStartE, .Xe(XeE), .Ye(YeE), .XZeroE, .YZeroE, .OTFCSwap, .IFDivStartE, .Xe(XeE), .Ye(YeE), .XZeroE, .YZeroE, .OTFCSwap,
.FDivBusyE); .FDivBusyE);
fdivsqrtpostproc fdivsqrtpostproc( fdivsqrtpostproc fdivsqrtpostproc(
.WS, .WC, .D, .FirstU, .FirstUM, .FirstC, .Firstun, .WS, .WC, .D, .FirstU, .FirstUM, .FirstC, .Firstun,
.SqrtM, .SpecialCaseM, .RemOpM(Funct3M[1]), .ForwardedSrcAE, .SqrtM, .SpecialCaseM, .RemOpM(Funct3M[1]), .ForwardedSrcAE,
.n, .ALTBM, .m, .BZero, .As, .n, .ALTBM, .m, .BZero, .As,
.QmM, .WZero, .DivSM); .QmM, .WZero, .DivSM, .FPIntDivResultM);
endmodule endmodule

72
pipelined/src/fpu/fdivsqrt/fdivsqrtiter.sv
View File

@ -40,42 +40,34 @@ module fdivsqrtiter(
// input logic SqrtM, // input logic SqrtM,
input logic OTFCSwap, input logic OTFCSwap,
input logic [`DIVb+3:0] X, input logic [`DIVb+3:0] X,
input logic [`DIVN-2:0] Dpreproc, input logic [`DIVb-1:0] DPreproc,
output logic [`DIVN-2:0] D, // U0.N-1 output logic [`DIVb-1:0] D,
output logic [`DIVb:0] FirstU, FirstUM, output logic [`DIVb:0] FirstU, FirstUM,
output logic [`DIVb+1:0] FirstC, output logic [`DIVb+1:0] FirstC,
output logic Firstun, output logic Firstun,
output logic [`DIVb+3:0] FirstWS, FirstWC output logic [`DIVb+3:0] FirstWS, FirstWC
); );
//QLEN = 1.(number of bits created for division) /* verilator lint_off UNOPTFLAT */
// N is NF+1 or XLEN logic [`DIVb+3:0] WSNext[`DIVCOPIES-1:0]; // Q4.b
// WC/WS is dependent on D so 4.N-1 ie N+3 bits or N+2:0 + one more bit in fraction for possible sqrt right shift logic [`DIVb+3:0] WCNext[`DIVCOPIES-1:0]; // Q4.b
// D is 1.N-1, but the msb is always 1 so 0.N-1 or N-1 bits or N-2:0 logic [`DIVb+3:0] WS[`DIVCOPIES:0]; // Q4.b
// Dsel should match WC/WS so 4.N-1 ie N+3 bits or N+2:0 logic [`DIVb+3:0] WC[`DIVCOPIES:0]; // Q4.b
// U/UM should be 1.b so b+1 bits or b:0 logic [`DIVb:0] U[`DIVCOPIES:0]; // U1.b
// C needs to be the lenght of the final fraction 0.b so b or b-1:0 logic [`DIVb:0] UM[`DIVCOPIES:0]; // U1.b
/* verilator lint_off UNOPTFLAT */ logic [`DIVb:0] UNext[`DIVCOPIES-1:0]; // U1.b
logic [`DIVb+3:0] WSNext[`DIVCOPIES-1:0]; // Q4.b logic [`DIVb:0] UMNext[`DIVCOPIES-1:0]; // U1.b
logic [`DIVb+3:0] WCNext[`DIVCOPIES-1:0]; // Q4.b logic [`DIVb+1:0] C[`DIVCOPIES:0]; // Q2.b
logic [`DIVb+3:0] WS[`DIVCOPIES:0]; // Q4.b logic [`DIVb+1:0] initC; // Q2.b
logic [`DIVb+3:0] WC[`DIVCOPIES:0]; // Q4.b
logic [`DIVb:0] U[`DIVCOPIES:0]; // U1.b
logic [`DIVb:0] UM[`DIVCOPIES:0];// 1.b
logic [`DIVb:0] UNext[`DIVCOPIES-1:0];// U1.b
logic [`DIVb:0] UMNext[`DIVCOPIES-1:0];// U1.b
logic [`DIVb+1:0] C[`DIVCOPIES:0]; // Q2.b
logic [`DIVb+1:0] initC; // Q2.b
logic [`DIVCOPIES-1:0] un; logic [`DIVCOPIES-1:0] un;
/* verilator lint_on UNOPTFLAT */ logic [`DIVb+3:0] WSN, WCN; // Q4.b
logic [`DIVb+3:0] WSN, WCN; // Q4.N-1 logic [`DIVb+3:0] DBar, D2, DBar2; // Q4.b
logic [`DIVb+3:0] DBar, D2, DBar2; // Q4.N-1 logic [`DIVb+1:0] NextC;
logic [`DIVb+1:0] NextC; logic [`DIVb+1:0] CMux;
logic [`DIVb+1:0] CMux; logic [`DIVb:0] UMux, UMMux;
logic [`DIVb:0] UMux, UMMux; logic [`DIVb:0] initU, initUM;
logic [`DIVb:0] initU, initUM; /* verilator lint_on UNOPTFLAT */
// Top Muxes and Registers // Top Muxes and Registers
// When start is asserted, the inputs are loaded into the divider. // When start is asserted, the inputs are loaded into the divider.
@ -85,15 +77,15 @@ module fdivsqrtiter(
// Residual WS/SC registers/initializaiton mux // Residual WS/SC registers/initializaiton mux
mux2 #(`DIVb+4) wsmux(WS[`DIVCOPIES], X, IFDivStartE, WSN); mux2 #(`DIVb+4) wsmux(WS[`DIVCOPIES], X, IFDivStartE, WSN);
mux2 #(`DIVb+4) wcmux(WC[`DIVCOPIES], '0, IFDivStartE, WCN); mux2 #(`DIVb+4) wcmux(WC[`DIVCOPIES], '0, IFDivStartE, WCN);
flopen #(`DIVb+4) wsflop(clk, FDivBusyE, WSN, WS[0]); flopen #(`DIVb+4) wsreg(clk, FDivBusyE, WSN, WS[0]);
flopen #(`DIVb+4) wcflop(clk, FDivBusyE, WCN, WC[0]); flopen #(`DIVb+4) wcreg(clk, FDivBusyE, WCN, WC[0]);
// UOTFC Result U and UM registers/initialization mux // UOTFC Result U and UM registers/initialization mux
// Initialize U to 1.0 and UM to 0 for square root; U to 0 and UM to -1 for division // Initialize U to 1.0 and UM to 0 for square root; U to 0 and UM to -1 for division
assign initU = SqrtE ? {1'b1, {(`DIVb){1'b0}}} : 0; assign initU = SqrtE ? {1'b1, {(`DIVb){1'b0}}} : 0;
assign initUM = SqrtE ? 0 : {1'b1, {(`DIVb){1'b0}}}; assign initUM = SqrtE ? 0 : {1'b1, {(`DIVb){1'b0}}};
mux2 #(`DIVb+1) Umux(UNext[`DIVCOPIES-1], initU, IFDivStartE, UMux); mux2 #(`DIVb+1) Umux(UNext[`DIVCOPIES-1], initU, IFDivStartE, UMux);
mux2 #(`DIVb+1) UMmux(UMNext[`DIVCOPIES-1], initUM, IFDivStartE, UMMux); mux2 #(`DIVb+1) UMmux(UMNext[`DIVCOPIES-1], initUM, IFDivStartE, UMMux);
flopen #(`DIVb+1) UReg(clk, IFDivStartE|FDivBusyE, UMux, U[0]); flopen #(`DIVb+1) UReg(clk, IFDivStartE|FDivBusyE, UMux, U[0]);
flopen #(`DIVb+1) UMReg(clk, IFDivStartE|FDivBusyE, UMMux, UM[0]); flopen #(`DIVb+1) UMReg(clk, IFDivStartE|FDivBusyE, UMMux, UM[0]);
@ -103,18 +95,18 @@ module fdivsqrtiter(
assign initCUpper = SqrtE ? 2'b11 : (`RADIX == 4) ? 2'b00 : 2'b10; assign initCUpper = SqrtE ? 2'b11 : (`RADIX == 4) ? 2'b00 : 2'b10;
assign initC = {initCUpper, {`DIVb{1'b0}}}; assign initC = {initCUpper, {`DIVb{1'b0}}};
mux2 #(`DIVb+2) Cmux(C[`DIVCOPIES], initC, IFDivStartE, CMux); mux2 #(`DIVb+2) Cmux(C[`DIVCOPIES], initC, IFDivStartE, CMux);
flopen #(`DIVb+2) cflop(clk, IFDivStartE|FDivBusyE, CMux, C[0]); flopen #(`DIVb+2) creg(clk, IFDivStartE|FDivBusyE, CMux, C[0]);
// Divisior register // Divisior register
flopen #(`DIVN-1) dflop(clk, IFDivStartE, Dpreproc, D); flopen #(`DIVb) dreg(clk, IFDivStartE, DPreproc, D);
// Divisor Selections // Divisor Selections
// - choose the negitive version of what's being selected // - choose the negitive version of what's being selected
// - D is only the fraction // - D is a 0.b mantissa
assign DBar = {3'b111, 1'b0, ~D, {`DIVb-`DIVN+1{1'b1}}}; assign DBar = {3'b111, 1'b0, ~D};
if(`RADIX == 4) begin : d2 if(`RADIX == 4) begin : d2
assign DBar2 = {2'b11, 1'b0, ~D, {`DIVb+2-`DIVN{1'b1}}}; assign DBar2 = {2'b11, 1'b0, ~D, 1'b1};
assign D2 = {2'b0, 1'b1, D, {`DIVb+2-`DIVN{1'b0}}}; assign D2 = {2'b0, 1'b1, D, 1'b0};
end end
// k=DIVCOPIES of the recurrence logic // k=DIVCOPIES of the recurrence logic

24
pipelined/src/fpu/fdivsqrt/fdivsqrtpostproc.sv
View File

@ -32,8 +32,8 @@
module fdivsqrtpostproc( module fdivsqrtpostproc(
input logic [`DIVb+3:0] WS, WC, input logic [`DIVb+3:0] WS, WC,
input logic [`DIVN-2:0] D, // U0.N-1 input logic [`DIVb-1:0] D,
input logic [`DIVb:0] FirstU, FirstUM, input logic [`DIVb:0] FirstU, FirstUM,
input logic [`DIVb+1:0] FirstC, input logic [`DIVb+1:0] FirstC,
input logic Firstun, input logic Firstun,
input logic SqrtM, input logic SqrtM,
@ -41,19 +41,20 @@ module fdivsqrtpostproc(
input logic [`XLEN-1:0] ForwardedSrcAE, input logic [`XLEN-1:0] ForwardedSrcAE,
input logic RemOpM, ALTBM, BZero, As, input logic RemOpM, ALTBM, BZero, As,
input logic [`DIVBLEN:0] n, m, input logic [`DIVBLEN:0] n, m,
output logic [`DIVb:0] QmM, output logic [`DIVb:0] QmM,
output logic WZero, output logic WZero,
output logic DivSM output logic DivSM,
output logic [`XLEN-1:0] FPIntDivResultM
); );
logic [`DIVb+3:0] W, Sum, RemD; logic [`DIVb+3:0] W, Sum, RemDM;
logic [`DIVb:0] PreQmM; logic [`DIVb:0] PreQmM;
logic NegStickyM, PostIncM; logic NegStickyM, PostIncM;
logic weq0; logic weq0;
logic [`DIVBLEN:0] NormShiftM; logic [`DIVBLEN:0] NormShiftM;
logic [`DIVb:0] IntQuotM, NormQuotM; logic [`DIVb:0] IntQuotM, NormQuotM;
logic [`DIVb+3:0] IntRemM, NormRemM; logic [`DIVb+3:0] IntRemM, NormRemM;
logic [`DIVb+3:0] PreResultM, ResultM; logic [`DIVb+3:0] PreResultM, PreFPIntDivResultM;
// check for early termination on an exact result. If the result is not exact, the sticky should be set // check for early termination on an exact result. If the result is not exact, the sticky should be set
aplusbeq0 #(`DIVb+4) wspluswceq0(WS, WC, weq0); aplusbeq0 #(`DIVb+4) wspluswceq0(WS, WC, weq0);
@ -78,14 +79,14 @@ module fdivsqrtpostproc(
assign Sum = WC + WS; assign Sum = WC + WS;
assign W = $signed(Sum) >>> `LOGR; assign W = $signed(Sum) >>> `LOGR;
assign NegStickyM = W[`DIVb+3]; assign NegStickyM = W[`DIVb+3];
assign RemD = {4'b0000, D, {(`DIVb-`DIVN+1){1'b0}}}; assign RemDM = {4'b0000, D};
// Integer division: sign handling for div and rem // Integer division: sign handling for div and rem
always_comb always_comb
if (~As) if (~As)
if (NegStickyM) begin if (NegStickyM) begin
NormQuotM = FirstUM; NormQuotM = FirstUM;
NormRemM = W + RemD; NormRemM = W + RemDM;
PostIncM = 0; PostIncM = 0;
end else begin end else begin
NormQuotM = FirstU; NormQuotM = FirstU;
@ -99,7 +100,7 @@ module fdivsqrtpostproc(
PostIncM = 0; PostIncM = 0;
end else begin end else begin
NormQuotM = FirstU; NormQuotM = FirstU;
NormRemM = W - RemD; NormRemM = W - RemDM;
PostIncM = 1; PostIncM = 1;
end end
@ -136,8 +137,9 @@ module fdivsqrtpostproc(
// division takes the result from the next cycle, which is shifted to the left one more time so the square root also needs to be shifted // division takes the result from the next cycle, which is shifted to the left one more time so the square root also needs to be shifted
assign ResultM = ($signed(PreResultM) >>> NormShiftM) + {{(`DIVb+3){1'b0}}, (PostIncM & ~RemOpM)}; assign PreFPIntDivResultM = ($signed(PreResultM) >>> NormShiftM) + {{(`DIVb+3){1'b0}}, (PostIncM & ~RemOpM)};
assign FPIntDivResultM = PreFPIntDivResultM[`XLEN-1:0];
assign PreQmM = NegStickyM ? FirstUM : FirstU; // Select U or U-1 depending on negative sticky bit assign PreQmM = NegStickyM ? FirstUM : FirstU; // Select U or U-1 depending on negative sticky bit
assign QmM = SqrtM ? (PreQmM << 1) : PreQmM; assign QmM = SqrtM ? (PreQmM << 1) : PreQmM;
endmodule endmodule

56
pipelined/src/fpu/fdivsqrt/fdivsqrtpreproc.sv
View File

@ -45,22 +45,21 @@ module fdivsqrtpreproc (
output logic OTFCSwap, ALTBM, BZero, As, output logic OTFCSwap, ALTBM, BZero, As,
output logic [`NE+1:0] QeM, output logic [`NE+1:0] QeM,
output logic [`DIVb+3:0] X, output logic [`DIVb+3:0] X,
output logic [`DIVN-2:0] Dpreproc output logic [`DIVb-1:0] DPreproc
); );
// logic [`DIVLEN-1:0] ExtraA, ExtraB, PreprocA, PreprocB, PreprocX, PreprocY;
logic [`NF-1:0] PreprocA, PreprocX; logic [`DIVb-1:0] XPreproc;
logic [`NF-1:0] PreprocB, PreprocY; logic [`DIVb:0] SqrtX;
logic [`NF+1:0] SqrtX;
logic [`DIVb+3:0] DivX; logic [`DIVb+3:0] DivX;
logic [`NE+1:0] Qe; logic [`NE+1:0] QeE;
// Intdiv signals // Intdiv signals
logic [`DIVb-1:0] ZeroBufX, ZeroBufY; logic [`DIVb-1:0] IFNormLenX, IFNormLenD;
logic [`XLEN-1:0] PosA, PosB; logic [`XLEN-1:0] PosA, PosB;
logic Bs, OTFCSwapTemp, ALTBE; logic Bs, CalcOTFCSwap, ALTBE;
logic [`XLEN-1:0] A64, B64; logic [`XLEN-1:0] A64, B64;
logic [`DIVBLEN:0] Calcn, Calcm; logic [`DIVBLEN:0] Calcn, Calcm;
logic [`DIVBLEN:0] ZeroDiff, IntBits, RightShiftX; logic [`DIVBLEN:0] ZeroDiff, IntBits, RightShiftX;
logic [`DIVBLEN:0] pPlusr, pPrCeil, p, L; logic [`DIVBLEN:0] pPlusr, pPrCeil, p, ell;
logic [`LOGRK-1:0] pPrTrunc; logic [`LOGRK-1:0] pPrTrunc;
logic [`DIVb+3:0] PreShiftX; logic [`DIVb+3:0] PreShiftX;
@ -72,39 +71,38 @@ module fdivsqrtpreproc (
assign A64 = W64E ? {{(`XLEN-32){As}}, ForwardedSrcAE[31:0]} : ForwardedSrcAE; assign A64 = W64E ? {{(`XLEN-32){As}}, ForwardedSrcAE[31:0]} : ForwardedSrcAE;
assign B64 = W64E ? {{(`XLEN-32){Bs}}, ForwardedSrcBE[31:0]} : ForwardedSrcBE; assign B64 = W64E ? {{(`XLEN-32){Bs}}, ForwardedSrcBE[31:0]} : ForwardedSrcBE;
assign OTFCSwapTemp = (As ^ Bs) & MDUE; assign CalcOTFCSwap = (As ^ Bs) & MDUE;
assign PosA = As ? -A64 : A64; assign PosA = As ? -A64 : A64;
assign PosB = Bs ? -B64 : B64; assign PosB = Bs ? -B64 : B64;
assign BZero = |ForwardedSrcBE; assign BZero = |ForwardedSrcBE;
assign ZeroBufX = MDUE ? {PosA, {`DIVb-`XLEN{1'b0}}} : {Xm, {`DIVb-`NF-1{1'b0}}}; assign IFNormLenX = MDUE ? {PosA, {(`DIVb-`XLEN){1'b0}}} : {Xm, {(`DIVb-`NF-1){1'b0}}};
assign ZeroBufY = MDUE ? {PosB, {`DIVb-`XLEN{1'b0}}} : {Ym, {`DIVb-`NF-1{1'b0}}}; assign IFNormLenD = MDUE ? {PosB, {(`DIVb-`XLEN){1'b0}}} : {Ym, {(`DIVb-`NF-1){1'b0}}};
lzc #(`DIVb) lzcX (ZeroBufX, L); lzc #(`DIVb) lzcX (IFNormLenX, ell);
lzc #(`DIVb) lzcY (ZeroBufY, Calcm); lzc #(`DIVb) lzcY (IFNormLenD, Calcm);
assign PreprocX = Xm[`NF-1:0]<<L; assign XPreproc = IFNormLenX << (ell + {{`DIVBLEN{1'b0}}, ~MDUE}); // had issue with (`DIVBLEN+1)'(~MDUE) so using this instead
assign PreprocY = Ym[`NF-1:0]<<Calcm; assign DPreproc = IFNormLenD << (Calcm + {{`DIVBLEN{1'b0}}, ~MDUE});
assign ZeroDiff = Calcm - L; assign ZeroDiff = Calcm - ell;
assign ALTBE = ZeroDiff[`DIVBLEN]; // A less than B assign ALTBE = ZeroDiff[`DIVBLEN]; // A less than B
assign p = ALTBE ? '0 : ZeroDiff; assign p = ALTBE ? '0 : ZeroDiff;
assign pPlusr = (`DIVBLEN)'(`LOGR) + p; assign pPlusr = (`DIVBLEN)'(`LOGR) + p;
assign pPrTrunc = pPlusr[`LOGRK-1:0]; assign pPrTrunc = pPlusr[`LOGRK-1:0];
assign pPrCeil = (pPlusr >> `LOGRK) + {{`DIVBLEN-1{1'b0}}, |(pPrTrunc)}; assign pPrCeil = (pPlusr >> `LOGRK) + {{`DIVBLEN{1'b0}}, |(pPrTrunc)};
assign Calcn = (pPrCeil << `LOGK) - 1; assign Calcn = (pPrCeil << `LOGK) - 1;
assign IntBits = (`DIVBLEN)'(`RK) + p; assign IntBits = (`DIVBLEN)'(`RK) + p;
assign RightShiftX = (`DIVBLEN)'(`RK) - {{(`DIVBLEN-`RK){1'b0}}, IntBits[`RK-1:0]}; assign RightShiftX = (`DIVBLEN)'(`RK) - {{(`DIVBLEN-`RK){1'b0}}, IntBits[`RK-1:0]};
assign SqrtX = Xe[0]^L[0] ? {1'b0, ~XZero, PreprocX} : {~XZero, PreprocX, 1'b0}; assign SqrtX = (Xe[0]^ell[0]) ? {1'b0, ~XZero, XPreproc[`DIVb-1:1]} : {~XZero, XPreproc}; // Bottom bit of XPreproc is always zero because DIVb is larger than XLEN and NF
assign DivX = {3'b000, ~XZero, PreprocX, {`DIVb-`NF{1'b0}}}; assign DivX = {3'b000, ~XZero, XPreproc};
// *** explain why X is shifted between radices (initial assignment of WS=RX) // *** explain why X is shifted between radices (initial assignment of WS=RX)
if (`RADIX == 2) assign PreShiftX = Sqrt ? {3'b111, SqrtX, {`DIVb-1-`NF{1'b0}}} : DivX; if (`RADIX == 2) assign PreShiftX = Sqrt ? {3'b111, SqrtX} : DivX;
else assign PreShiftX = Sqrt ? {2'b11, SqrtX, {`DIVb-1-`NF{1'b0}}, 1'b0} : DivX; else assign PreShiftX = Sqrt ? {2'b11, SqrtX, 1'b0} : DivX;
assign X = MDUE ? DivX >> RightShiftX : PreShiftX; assign X = MDUE ? DivX >> RightShiftX : PreShiftX;
assign Dpreproc = {PreprocY, {`DIVN-1-`NF{1'b0}}};
// radix 2 radix 4 // radix 2 radix 4
// 1 copies DIVLEN+2 DIVLEN+2/2 // 1 copies DIVLEN+2 DIVLEN+2/2
@ -116,12 +114,12 @@ module fdivsqrtpreproc (
// r = 1 or 2 // r = 1 or 2
// DIVRESLEN/(r*`DIVCOPIES) // DIVRESLEN/(r*`DIVCOPIES)
flopen #(`NE+2) expreg(clk, IFDivStartE, Qe, QeM); flopen #(`NE+2) expreg(clk, IFDivStartE, QeE, QeM);
flopen #(1) swapreg(clk, IFDivStartE, OTFCSwapTemp, OTFCSwap); flopen #(1) swapreg(clk, IFDivStartE, CalcOTFCSwap, OTFCSwap);
flopen #(1) altbreg(clk, IFDivStartE, ALTBE, ALTBM); flopen #(1) altbreg(clk, IFDivStartE, ALTBE, ALTBM);
flopen #(`DIVBLEN+1) nreg(clk, IFDivStartE, Calcn, n); flopen #(`DIVBLEN+1) nreg(clk, IFDivStartE, Calcn, n);
flopen #(`DIVBLEN+1) mreg(clk, IFDivStartE, Calcm, m); flopen #(`DIVBLEN+1) mreg(clk, IFDivStartE, Calcm, m);
expcalc expcalc(.Fmt, .Xe, .Ye, .Sqrt, .XZero, .L, .m(Calcm), .Qe); expcalc expcalc(.Fmt, .Xe, .Ye, .Sqrt, .XZero, .ell, .m(Calcm), .Qe(QeE));
endmodule endmodule
@ -130,7 +128,7 @@ module expcalc(
input logic [`NE-1:0] Xe, Ye, input logic [`NE-1:0] Xe, Ye,
input logic Sqrt, input logic Sqrt,
input logic XZero, input logic XZero,
input logic [`DIVBLEN:0] L, m, input logic [`DIVBLEN:0] ell, m,
output logic [`NE+1:0] Qe output logic [`NE+1:0] Qe
); );
logic [`NE-2:0] Bias; logic [`NE-2:0] Bias;
@ -162,10 +160,10 @@ module expcalc(
2'h2: Bias = (`NE-1)'(`H_BIAS); 2'h2: Bias = (`NE-1)'(`H_BIAS);
endcase endcase
end end
assign SXExp = {2'b0, Xe} - {{(`NE+1-`DIVBLEN){1'b0}}, L} - (`NE+2)'(`BIAS); assign SXExp = {2'b0, Xe} - {{(`NE+1-`DIVBLEN){1'b0}}, ell} - (`NE+2)'(`BIAS);
assign SExp = {SXExp[`NE+1], SXExp[`NE+1:1]} + {2'b0, Bias}; assign SExp = {SXExp[`NE+1], SXExp[`NE+1:1]} + {2'b0, Bias};
// correct exponent for denormalized input's normalization shifts // correct exponent for denormalized input's normalization shifts
assign DExp = ({2'b0, Xe} - {{(`NE+1-`DIVBLEN){1'b0}}, L} - {2'b0, Ye} + {{(`NE+1-`DIVBLEN){1'b0}}, m} + {3'b0, Bias}) & {`NE+2{~XZero}}; assign DExp = ({2'b0, Xe} - {{(`NE+1-`DIVBLEN){1'b0}}, ell} - {2'b0, Ye} + {{(`NE+1-`DIVBLEN){1'b0}}, m} + {3'b0, Bias}) & {`NE+2{~XZero}};
assign Qe = Sqrt ? SExp : DExp; assign Qe = Sqrt ? SExp : DExp;
endmodule endmodule

4
pipelined/src/fpu/fdivsqrt/fdivsqrtstage2.sv
View File

@ -32,7 +32,7 @@
/* verilator lint_off UNOPTFLAT */ /* verilator lint_off UNOPTFLAT */
module fdivsqrtstage2 ( module fdivsqrtstage2 (
input logic [`DIVN-2:0] D, input logic [`DIVb-1:0] D,
input logic [`DIVb+3:0] DBar, input logic [`DIVb+3:0] DBar,
input logic [`DIVb:0] U, UM, input logic [`DIVb:0] U, UM,
input logic [`DIVb+3:0] WS, WC, input logic [`DIVb+3:0] WS, WC,
@ -69,7 +69,7 @@ module fdivsqrtstage2 (
always_comb always_comb
if (up) Dsel = DBar; if (up) Dsel = DBar;
else if (uz) Dsel = '0; // qz else if (uz) Dsel = '0; // qz
else Dsel = {3'b0, 1'b1, D, {`DIVb-`DIVN+1{1'b0}}}; // un else Dsel = {3'b000, 1'b1, D}; // un
// Partial Product Generation // Partial Product Generation
// WSA, WCA = WS + WC - qD // WSA, WCA = WS + WC - qD

6
pipelined/src/fpu/fdivsqrt/fdivsqrtstage4.sv
View File

@ -31,7 +31,7 @@
`include "wally-config.vh" `include "wally-config.vh"
module fdivsqrtstage4 ( module fdivsqrtstage4 (
input logic [`DIVN-2:0] D, input logic [`DIVb-1:0] D,
input logic [`DIVb+3:0] DBar, D2, DBar2, input logic [`DIVb+3:0] DBar, D2, DBar2,
input logic [`DIVb:0] U, UM, input logic [`DIVb:0] U, UM,
input logic [`DIVb+3:0] WS, WC, input logic [`DIVb+3:0] WS, WC,
@ -61,7 +61,7 @@ module fdivsqrtstage4 (
// 0010 = -1 // 0010 = -1
// 0001 = -2 // 0001 = -2
assign Smsbs = U[`DIVb:`DIVb-4]; assign Smsbs = U[`DIVb:`DIVb-4];
assign Dmsbs = D[`DIVN-2:`DIVN-4]; assign Dmsbs = D[`DIVb-1:`DIVb-3];
assign WCmsbs = WC[`DIVb+3:`DIVb-4]; assign WCmsbs = WC[`DIVb+3:`DIVb-4];
assign WSmsbs = WS[`DIVb+3:`DIVb-4]; assign WSmsbs = WS[`DIVb+3:`DIVb-4];
@ -77,7 +77,7 @@ module fdivsqrtstage4 (
4'b1000: Dsel = DBar2; 4'b1000: Dsel = DBar2;
4'b0100: Dsel = DBar; 4'b0100: Dsel = DBar;
4'b0000: Dsel = '0; 4'b0000: Dsel = '0;
4'b0010: Dsel = {3'b0, 1'b1, D, {`DIVb-`DIVN+1{1'b0}}}; 4'b0010: Dsel = {3'b0, 1'b1, D};
4'b0001: Dsel = D2; 4'b0001: Dsel = D2;
default: Dsel = 'x; default: Dsel = 'x;
endcase endcase

9
pipelined/src/fpu/fpu.sv
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@ -55,7 +55,8 @@ module fpu (
output logic FCvtIntW, // select FCvtIntRes (to IEU) output logic FCvtIntW, // select FCvtIntRes (to IEU)
output logic FDivBusyE, // Is the divide/sqrt unit busy (stall execute stage) (to HZU) output logic FDivBusyE, // Is the divide/sqrt unit busy (stall execute stage) (to HZU)
output logic IllegalFPUInstrM, // Is the instruction an illegal fpu instruction (to privileged unit) output logic IllegalFPUInstrM, // Is the instruction an illegal fpu instruction (to privileged unit)
output logic [4:0] SetFflagsM // FPU flags (to privileged unit) output logic [4:0] SetFflagsM, // FPU flags (to privileged unit)
output logic [`XLEN-1:0] FPIntDivResultW
); );
// FPU specifics: // FPU specifics:
@ -152,6 +153,7 @@ module fpu (
logic [`FLEN-1:0] BoxedZeroE; // Zero value for Z for multiplication, with NaN boxing if needed logic [`FLEN-1:0] BoxedZeroE; // Zero value for Z for multiplication, with NaN boxing if needed
logic [`FLEN-1:0] BoxedOneE; // Zero value for Z for multiplication, with NaN boxing if needed logic [`FLEN-1:0] BoxedOneE; // Zero value for Z for multiplication, with NaN boxing if needed
logic StallUnpackedM; logic StallUnpackedM;
logic [`XLEN-1:0] FPIntDivResultM;
// DECODE STAGE // DECODE STAGE
@ -267,7 +269,7 @@ module fpu (
.XInfE, .YInfE, .XZeroE, .YZeroE, .XNaNE, .YNaNE, .FDivStartE, .IDivStartE, .XsE, .XInfE, .YInfE, .XZeroE, .YZeroE, .XNaNE, .YNaNE, .FDivStartE, .IDivStartE, .XsE,
.ForwardedSrcAE, .ForwardedSrcBE, .Funct3E, .Funct3M, .MDUE, .W64E, .ForwardedSrcAE, .ForwardedSrcBE, .Funct3E, .Funct3M, .MDUE, .W64E,
.StallE, .StallM, .TrapM, .DivSM, .FDivBusyE, .IFDivStartE, .FDivDoneE, .QeM, .StallE, .StallM, .TrapM, .DivSM, .FDivBusyE, .IFDivStartE, .FDivDoneE, .QeM,
.QmM /*, .DivDone(DivDoneM) */); .QmM, .FPIntDivResultM /*, .DivDone(DivDoneM) */);
// //
// compare // compare
@ -387,7 +389,8 @@ module fpu (
// M/W pipe registers // M/W pipe registers
flopenrc #(`FLEN) MWRegFp(clk, reset, FlushW, ~StallW, FpResM, FpResW); flopenrc #(`FLEN) MWRegFp(clk, reset, FlushW, ~StallW, FpResM, FpResW);
flopenrc #(`XLEN) MWRegInt(clk, reset, FlushW, ~StallW, FCvtIntResM, FCvtIntResW); flopenrc #(`XLEN) MWRegIntCvtRes(clk, reset, FlushW, ~StallW, FCvtIntResM, FCvtIntResW);
flopenrc #(`XLEN) MWRegIntDivRes(clk, reset, FlushW, ~StallW, FPIntDivResultM, FPIntDivResultW);
// BEGIN WRITEBACK STAGE // BEGIN WRITEBACK STAGE

16
pipelined/src/ieu/controller.sv
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@ -65,7 +65,7 @@ module controller(
output logic FWriteIntM, output logic FWriteIntM,
// Writeback stage control signals // Writeback stage control signals
input logic StallW, FlushW, input logic StallW, FlushW,
output logic RegWriteW, // for datapath and Hazard Unit output logic RegWriteW, DivW, // for datapath and Hazard Unit
output logic [2:0] ResultSrcW, output logic [2:0] ResultSrcW,
// Stall during CSRs // Stall during CSRs
output logic CSRWriteFencePendingDEM, output logic CSRWriteFencePendingDEM,
@ -109,6 +109,7 @@ module controller(
logic IllegalERegAdrD; logic IllegalERegAdrD;
logic [1:0] AtomicE; logic [1:0] AtomicE;
logic FencePendingD, FencePendingE, FencePendingM; logic FencePendingD, FencePendingE, FencePendingM;
logic DivE, DivM;
// Extract fields // Extract fields
@ -222,16 +223,17 @@ module controller(
assign MemReadE = MemRWE[1]; assign MemReadE = MemRWE[1];
assign SCE = (ResultSrcE == 3'b100); assign SCE = (ResultSrcE == 3'b100);
assign RegWriteE = IEURegWriteE | FWriteIntE; // IRF register writes could come from IEU or FPU controllers assign RegWriteE = IEURegWriteE | FWriteIntE; // IRF register writes could come from IEU or FPU controllers
assign DivE = MDUE & Funct3E[2]; // Division operation
// Memory stage pipeline control register // Memory stage pipeline control register
flopenrc #(19) controlregM(clk, reset, FlushM, ~StallM, flopenrc #(20) controlregM(clk, reset, FlushM, ~StallM,
{RegWriteE, ResultSrcE, MemRWE, CSRReadE, CSRWriteE, PrivilegedE, Funct3E, FWriteIntE, AtomicE, InvalidateICacheE, FlushDCacheE, FencePendingE, InstrValidE}, {RegWriteE, ResultSrcE, MemRWE, CSRReadE, CSRWriteE, PrivilegedE, Funct3E, FWriteIntE, AtomicE, InvalidateICacheE, FlushDCacheE, FencePendingE, InstrValidE, DivE},
{RegWriteM, ResultSrcM, MemRWM, CSRReadM, CSRWriteM, PrivilegedM, Funct3M, FWriteIntM, AtomicM, InvalidateICacheM, FlushDCacheM, FencePendingM, InstrValidM}); {RegWriteM, ResultSrcM, MemRWM, CSRReadM, CSRWriteM, PrivilegedM, Funct3M, FWriteIntM, AtomicM, InvalidateICacheM, FlushDCacheM, FencePendingM, InstrValidM, DivM});
// Writeback stage pipeline control register // Writeback stage pipeline control register
flopenrc #(4) controlregW(clk, reset, FlushW, ~StallW, flopenrc #(5) controlregW(clk, reset, FlushW, ~StallW,
{RegWriteM, ResultSrcM}, {RegWriteM, ResultSrcM, DivM},
{RegWriteW, ResultSrcW}); {RegWriteW, ResultSrcW, DivW});
// Stall pipeline at Fetch if a CSR Write or Fence is pending in the subsequent stages // Stall pipeline at Fetch if a CSR Write or Fence is pending in the subsequent stages
assign CSRWriteFencePendingDEM = CSRWriteD | CSRWriteE | CSRWriteM | FencePendingD | FencePendingE | FencePendingM; assign CSRWriteFencePendingDEM = CSRWriteD | CSRWriteE | CSRWriteM | FencePendingD | FencePendingE | FencePendingM;

15
pipelined/src/ieu/datapath.sv
View File

@ -57,14 +57,15 @@ module datapath (
output logic [`XLEN-1:0] WriteDataM, output logic [`XLEN-1:0] WriteDataM,
// Writeback stage signals // Writeback stage signals
input logic StallW, FlushW, input logic StallW, FlushW,
(* mark_debug = "true" *) input logic RegWriteW, (* mark_debug = "true" *) input logic RegWriteW, DivW,
input logic SquashSCW, input logic SquashSCW,
input logic [2:0] ResultSrcW, input logic [2:0] ResultSrcW,
input logic [`XLEN-1:0] FCvtIntResW, input logic [`XLEN-1:0] FCvtIntResW,
input logic [`XLEN-1:0] ReadDataW, input logic [`XLEN-1:0] ReadDataW,
// input logic [`XLEN-1:0] PCLinkW, // input logic [`XLEN-1:0] PCLinkW,
input logic [`XLEN-1:0] CSRReadValW, MDUResultW, input logic [`XLEN-1:0] CSRReadValW, MDUResultW,
// Hazard Unit signals input logic [`XLEN-1:0] FPIntDivResultW,
// Hazard Unit signals
output logic [4:0] Rs1D, Rs2D, Rs1E, Rs2E, output logic [4:0] Rs1D, Rs2D, Rs1E, Rs2E,
output logic [4:0] RdE, RdM, RdW output logic [4:0] RdE, RdM, RdW
); );
@ -85,7 +86,7 @@ module datapath (
// Writeback stage signals // Writeback stage signals
logic [`XLEN-1:0] SCResultW; logic [`XLEN-1:0] SCResultW;
logic [`XLEN-1:0] ResultW; logic [`XLEN-1:0] ResultW;
logic [`XLEN-1:0] IFResultW, IFCvtResultW; logic [`XLEN-1:0] IFResultW, IFCvtResultW, MulDivResultW;
// Decode stage // Decode stage
assign Rs1D = InstrD[19:15]; assign Rs1D = InstrD[19:15];
@ -125,10 +126,16 @@ module datapath (
if (`F_SUPPORTED) begin:fpmux if (`F_SUPPORTED) begin:fpmux
mux2 #(`XLEN) resultmuxM(IEUResultM, FIntResM, FWriteIntM, IFResultM); mux2 #(`XLEN) resultmuxM(IEUResultM, FIntResM, FWriteIntM, IFResultM);
mux2 #(`XLEN) cvtresultmuxW(IFResultW, FCvtIntResW, FCvtIntW, IFCvtResultW); mux2 #(`XLEN) cvtresultmuxW(IFResultW, FCvtIntResW, FCvtIntW, IFCvtResultW);
if (`IDIV_ON_FPU) begin
mux2 #(`XLEN) divresultmuxW(MDUResultW, FPIntDivResultW, DivW, MulDivResultW);
end else begin
assign MulDivResultW = MDUResultW;
end
end else begin:fpmux end else begin:fpmux
assign IFResultM = IEUResultM; assign IFCvtResultW = IFResultW; assign IFResultM = IEUResultM; assign IFCvtResultW = IFResultW;
assign MulDivResultW = MDUResultW;
end end
mux5 #(`XLEN) resultmuxW(IFCvtResultW, ReadDataW, CSRReadValW, MDUResultW, SCResultW, ResultSrcW, ResultW); mux5 #(`XLEN) resultmuxW(IFCvtResultW, ReadDataW, CSRReadValW, MulDivResultW, SCResultW, ResultSrcW, ResultW);
// handle Store Conditional result if atomic extension supported // handle Store Conditional result if atomic extension supported
if (`A_SUPPORTED) assign SCResultW = {{(`XLEN-1){1'b0}}, SquashSCW}; if (`A_SUPPORTED) assign SCResultW = {{(`XLEN-1){1'b0}}, SquashSCW};

8
pipelined/src/ieu/ieu.sv
View File

@ -58,6 +58,7 @@ module ieu (
output logic InvalidateICacheM, FlushDCacheM, output logic InvalidateICacheM, FlushDCacheM,
// Writeback stage // Writeback stage
input logic [`XLEN-1:0] FPIntDivResultW,
input logic [`XLEN-1:0] CSRReadValW, MDUResultW, input logic [`XLEN-1:0] CSRReadValW, MDUResultW,
input logic [`XLEN-1:0] FCvtIntResW, input logic [`XLEN-1:0] FCvtIntResW,
output logic [4:0] RdW, output logic [4:0] RdW,
@ -83,6 +84,7 @@ module ieu (
logic SCE; logic SCE;
logic [4:0] RdE; logic [4:0] RdE;
logic FWriteIntM; logic FWriteIntM;
logic DivW;
// forwarding signals // forwarding signals
logic [4:0] Rs1D, Rs2D, Rs1E, Rs2E; logic [4:0] Rs1D, Rs2D, Rs1E, Rs2E;
@ -99,15 +101,15 @@ module ieu (
.Funct3E, .MDUE, .W64E, .JumpE, .SCE, .BranchSignedE, .StallM, .FlushM, .MemRWM, .Funct3E, .MDUE, .W64E, .JumpE, .SCE, .BranchSignedE, .StallM, .FlushM, .MemRWM,
.CSRReadM, .CSRWriteM, .PrivilegedM, .AtomicM, .Funct3M, .CSRReadM, .CSRWriteM, .PrivilegedM, .AtomicM, .Funct3M,
.RegWriteM, .InvalidateICacheM, .FlushDCacheM, .InstrValidM, .FWriteIntM, .RegWriteM, .InvalidateICacheM, .FlushDCacheM, .InstrValidM, .FWriteIntM,
.StallW, .FlushW, .RegWriteW, .ResultSrcW, .CSRWriteFencePendingDEM, .StoreStallD); .StallW, .FlushW, .RegWriteW, .DivW, .ResultSrcW, .CSRWriteFencePendingDEM, .StoreStallD);
datapath dp( datapath dp(
.clk, .reset, .ImmSrcD, .InstrD, .StallE, .FlushE, .ForwardAE, .ForwardBE, .clk, .reset, .ImmSrcD, .InstrD, .StallE, .FlushE, .ForwardAE, .ForwardBE,
.ALUControlE, .Funct3E, .ALUSrcAE, .ALUSrcBE, .ALUResultSrcE, .JumpE, .BranchSignedE, .ALUControlE, .Funct3E, .ALUSrcAE, .ALUSrcBE, .ALUResultSrcE, .JumpE, .BranchSignedE,
.PCE, .PCLinkE, .FlagsE, .IEUAdrE, .ForwardedSrcAE, .ForwardedSrcBE, .PCE, .PCLinkE, .FlagsE, .IEUAdrE, .ForwardedSrcAE, .ForwardedSrcBE,
.StallM, .FlushM, .FWriteIntM, .FIntResM, .SrcAM, .WriteDataM, .FCvtIntW, .StallM, .FlushM, .FWriteIntM, .FIntResM, .SrcAM, .WriteDataM, .FCvtIntW,
.StallW, .FlushW, .RegWriteW, .SquashSCW, .ResultSrcW, .ReadDataW, .FCvtIntResW, .StallW, .FlushW, .RegWriteW, .DivW, .SquashSCW, .ResultSrcW, .ReadDataW, .FCvtIntResW,
.CSRReadValW, .MDUResultW, .Rs1D, .Rs2D, .Rs1E, .Rs2E, .RdE, .RdM, .RdW); .CSRReadValW, .MDUResultW, .FPIntDivResultW, .Rs1D, .Rs2D, .Rs1E, .Rs2E, .RdE, .RdM, .RdW);
forward fw( forward fw(
.Rs1D, .Rs2D, .Rs1E, .Rs2E, .RdE, .RdM, .RdW, .Rs1D, .Rs2D, .Rs1E, .Rs2E, .RdE, .RdM, .RdW,

15
pipelined/src/muldiv/muldiv.sv
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@ -59,10 +59,17 @@ module muldiv (
// Divide // Divide
// Start a divide when a new division instruction is received and the divider isn't already busy or finishing // Start a divide when a new division instruction is received and the divider isn't already busy or finishing
assign DivE = MDUE & Funct3E[2]; // When F extensions are supported, use the FPU divider instead
assign DivSignedE = ~Funct3E[0]; if (`IDIV_ON_FPU) begin
intdivrestoring div(.clk, .reset, .StallM, .TrapM, .DivSignedE, .W64E, .DivE, assign QuotM = 0;
.ForwardedSrcAE, .ForwardedSrcBE, .DivBusyE, .QuotM, .RemM); assign RemM = 0;
assign DivBusyE = 0;
end else begin
assign DivE = MDUE & Funct3E[2];
assign DivSignedE = ~Funct3E[0];
intdivrestoring div(.clk, .reset, .StallM, .TrapM, .DivSignedE, .W64E, .DivE,
.ForwardedSrcAE, .ForwardedSrcBE, .DivBusyE, .QuotM, .RemM);
end
// Result multiplexer // Result multiplexer
always_comb always_comb

6
pipelined/src/wally/wallypipelinedcore.sv
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@ -99,6 +99,7 @@ module wallypipelinedcore (
logic FpLoadStoreM; logic FpLoadStoreM;
logic [1:0] FResSelW; logic [1:0] FResSelW;
logic [4:0] SetFflagsM; logic [4:0] SetFflagsM;
logic [`XLEN-1:0] FPIntDivResultW;
// memory management unit signals // memory management unit signals
logic ITLBWriteF; logic ITLBWriteF;
@ -228,7 +229,7 @@ module wallypipelinedcore (
.RdM, .FIntResM, .InvalidateICacheM, .FlushDCacheM, .RdM, .FIntResM, .InvalidateICacheM, .FlushDCacheM,
// Writeback stage // Writeback stage
.CSRReadValW, .MDUResultW, .CSRReadValW, .MDUResultW, .FPIntDivResultW,
.RdW, .ReadDataW(ReadDataW[`XLEN-1:0]), .RdW, .ReadDataW(ReadDataW[`XLEN-1:0]),
.InstrValidM, .InstrValidM,
.FCvtIntResW, .FCvtIntResW,
@ -405,7 +406,8 @@ module wallypipelinedcore (
.FCvtIntW, // fpu result selection .FCvtIntW, // fpu result selection
.FDivBusyE, // Is the divide/sqrt unit busy (stall execute stage) .FDivBusyE, // Is the divide/sqrt unit busy (stall execute stage)
.IllegalFPUInstrM, // Is the instruction an illegal fpu instruction .IllegalFPUInstrM, // Is the instruction an illegal fpu instruction
.SetFflagsM // FPU flags (to privileged unit) .SetFflagsM, // FPU flags (to privileged unit)
.FPIntDivResultW
); // floating point unit ); // floating point unit
end else begin // no F_SUPPORTED or D_SUPPORTED; tie outputs low end else begin // no F_SUPPORTED or D_SUPPORTED; tie outputs low
assign FStallD = 0; assign FStallD = 0;

1
pipelined/testbench/tests.vh
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@ -1413,6 +1413,7 @@ string imperas32f[] = '{
string arch32f[] = '{ string arch32f[] = '{
`RISCVARCHTEST, `RISCVARCHTEST,
"rv32i_m/F/src/fdiv_b20-01.S",
"rv32i_m/F/src/fadd_b10-01.S", "rv32i_m/F/src/fadd_b10-01.S",
"rv32i_m/F/src/fadd_b1-01.S", "rv32i_m/F/src/fadd_b1-01.S",
"rv32i_m/F/src/fadd_b11-01.S", "rv32i_m/F/src/fadd_b11-01.S",

11
tests/riscof/Makefile
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@ -8,8 +8,7 @@ wally_workdir = $(work)/wally-riscv-arch-test
current_dir = $(shell pwd) current_dir = $(shell pwd)
#XLEN ?= 64 #XLEN ?= 64
all: root fsd_fld_tempfix arch32 wally32 wally32e arch64 wally64 all: root arch32 wally32 wally32e arch64 wally64
#all: root fsd_fld_tempfix wally32
root: root:
mkdir -p $(work_dir) mkdir -p $(work_dir)
@ -20,14 +19,8 @@ root:
sed 's,{0},$(current_dir),g;s,{1},64gc,g' config.ini > config64.ini sed 's,{0},$(current_dir),g;s,{1},64gc,g' config.ini > config64.ini
sed 's,{0},$(current_dir),g;s,{1},32e,g' config.ini > config32e.ini sed 's,{0},$(current_dir),g;s,{1},32e,g' config.ini > config32e.ini
fsd_fld_tempfix:
# this is a temporary fix, there's a typo on the rv64i_m/D/src/d_fsd-align-01.S and rv64i_m/D/src/d_fld-align-01.S tests
# https://github.com/riscv-non-isa/riscv-arch-test/issues/266
find ../../addins/riscv-arch-test/riscv-test-suite -type f -name "*d_fld-align*.S" | xargs -I{} sed -i 's,regex(\.\*32\.\*),regex(\.\*64\.\*),g' {}
find ../../addins/riscv-arch-test/riscv-test-suite -type f -name "*d_fsd-align*.S" | xargs -I{} sed -i 's,regex(\.\*32\.\*),regex(\.\*64\.\*),g' {}
arch32: arch32:
riscof --verbose debug run --work-dir=$(work_dir) --config=config32.ini --suite=$(arch_dir)/riscv-test-suite/ --env=$(arch_dir)/riscv-test-suite/env --no-browser riscof run --work-dir=$(work_dir) --config=config32.ini --suite=$(arch_dir)/riscv-test-suite/ --env=$(arch_dir)/riscv-test-suite/env --no-browser
rsync -a $(work_dir)/rv32i_m/ $(arch_workdir)/rv32i_m/ || echo "error suppressed" rsync -a $(work_dir)/rv32i_m/ $(arch_workdir)/rv32i_m/ || echo "error suppressed"
arch64: arch64: