riscv/rocket-chip
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moving util out into Chisel standard library

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This commit is contained in:
Huy Vo 2012-06-06 12:47:17 -07:00
parent c975c21e44
commit 04304fe788
19 changed files with 78 additions and 268 deletions
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12
rocket/src/main/scala/arbiter.scala
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@ -28,12 +28,12 @@ class rocketMemArbiter(n: Int) extends Component {
var xi_bits = new TransactionInit var xi_bits = new TransactionInit
xi_bits := io.requestor(n-1).xact_init.bits xi_bits := io.requestor(n-1).xact_init.bits
xi_bits.tile_xact_id := Cat(io.requestor(n-1).xact_init.bits.tile_xact_id, UFix(n-1, log2up(n))) xi_bits.tile_xact_id := Cat(io.requestor(n-1).xact_init.bits.tile_xact_id, UFix(n-1, log2Up(n)))
for (i <- n-2 to 0 by -1) for (i <- n-2 to 0 by -1)
{ {
var my_xi_bits = new TransactionInit var my_xi_bits = new TransactionInit
my_xi_bits := io.requestor(i).xact_init.bits my_xi_bits := io.requestor(i).xact_init.bits
my_xi_bits.tile_xact_id := Cat(io.requestor(i).xact_init.bits.tile_xact_id, UFix(i, log2up(n))) my_xi_bits.tile_xact_id := Cat(io.requestor(i).xact_init.bits.tile_xact_id, UFix(i, log2Up(n)))
xi_bits = Mux(io.requestor(i).xact_init.valid, my_xi_bits, xi_bits) xi_bits = Mux(io.requestor(i).xact_init.valid, my_xi_bits, xi_bits)
} }
@ -60,17 +60,17 @@ class rocketMemArbiter(n: Int) extends Component {
for (i <- 0 until n) for (i <- 0 until n)
{ {
val tag = io.mem.xact_rep.bits.tile_xact_id val tag = io.mem.xact_rep.bits.tile_xact_id
io.requestor(i).xact_rep.valid := io.mem.xact_rep.valid && tag(log2up(n)-1,0) === UFix(i) io.requestor(i).xact_rep.valid := io.mem.xact_rep.valid && tag(log2Up(n)-1,0) === UFix(i)
io.requestor(i).xact_rep.bits := io.mem.xact_rep.bits io.requestor(i).xact_rep.bits := io.mem.xact_rep.bits
io.requestor(i).xact_rep.bits.tile_xact_id := tag >> UFix(log2up(n)) io.requestor(i).xact_rep.bits.tile_xact_id := tag >> UFix(log2Up(n))
} }
for (i <- 0 until n) for (i <- 0 until n)
{ {
val tag = io.mem.xact_abort.bits.tile_xact_id val tag = io.mem.xact_abort.bits.tile_xact_id
io.requestor(i).xact_abort.valid := io.mem.xact_abort.valid && tag(log2up(n)-1,0) === UFix(i) io.requestor(i).xact_abort.valid := io.mem.xact_abort.valid && tag(log2Up(n)-1,0) === UFix(i)
io.requestor(i).xact_abort.bits := io.mem.xact_abort.bits io.requestor(i).xact_abort.bits := io.mem.xact_abort.bits
io.requestor(i).xact_abort.bits.tile_xact_id := tag >> UFix(log2up(n)) io.requestor(i).xact_abort.bits.tile_xact_id := tag >> UFix(log2Up(n))
} }
io.mem.xact_abort.ready := Bool(true) io.mem.xact_abort.ready := Bool(true)

8
rocket/src/main/scala/consts.scala
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@ -176,7 +176,7 @@ object Constants
val DCACHE_PORTS = 3 val DCACHE_PORTS = 3
val CPU_DATA_BITS = 64; val CPU_DATA_BITS = 64;
val CPU_TAG_BITS = 9; val CPU_TAG_BITS = 9;
val DCACHE_TAG_BITS = log2up(DCACHE_PORTS) + CPU_TAG_BITS val DCACHE_TAG_BITS = log2Up(DCACHE_PORTS) + CPU_TAG_BITS
val OFFSET_BITS = 6; // log2(cache line size in bytes) val OFFSET_BITS = 6; // log2(cache line size in bytes)
val NMSHR = if (HAVE_VEC) 4 else 2 // number of primary misses val NMSHR = if (HAVE_VEC) 4 else 2 // number of primary misses
val NRPQ = 16; // number of secondary misses val NRPQ = 16; // number of secondary misses
@ -192,9 +192,9 @@ object Constants
val ENABLE_CLEAN_EXCLUSIVE = true val ENABLE_CLEAN_EXCLUSIVE = true
val COHERENCE_DATA_BITS = (1 << OFFSET_BITS)*8 val COHERENCE_DATA_BITS = (1 << OFFSET_BITS)*8
val TILE_ID_BITS = log2up(NTILES)+1 val TILE_ID_BITS = log2Up(NTILES)+1
val TILE_XACT_ID_BITS = log2up(NMSHR)+3 val TILE_XACT_ID_BITS = log2Up(NMSHR)+3
val GLOBAL_XACT_ID_BITS = log2up(NTILES*NMSHR)+1 val GLOBAL_XACT_ID_BITS = log2Up(NTILES*NMSHR)+1
val NGLOBAL_XACTS = 1 << GLOBAL_XACT_ID_BITS val NGLOBAL_XACTS = 1 << GLOBAL_XACT_ID_BITS
val X_INIT_TYPE_MAX_BITS = 2 val X_INIT_TYPE_MAX_BITS = 2

2
rocket/src/main/scala/cpu.scala
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@ -31,7 +31,7 @@ class rocketProc(resetSignal: Bool = null) extends Component(resetSignal)
vu = new vu() vu = new vu()
// cpu, vector prefetch, and vector use the DTLB // cpu, vector prefetch, and vector use the DTLB
val dtlbarb = new RRArbiter(3)({new ioDTLB_CPU_req_bundle()}) val dtlbarb = new RRArbiter(3)({new ioDTLB_CPU_req_bundle()})
val dtlbchosen = Reg(resetVal=Bits(DTLB_CPU,log2up(3))) val dtlbchosen = Reg(resetVal=Bits(DTLB_CPU,log2Up(3)))
when( dtlb.io.cpu_req.ready && dtlbarb.io.out.valid ) { dtlbchosen := dtlbarb.io.chosen } when( dtlb.io.cpu_req.ready && dtlbarb.io.out.valid ) { dtlbchosen := dtlbarb.io.chosen }
// tlb respones come out a cycle later // tlb respones come out a cycle later

4
rocket/src/main/scala/ctrl_util.scala
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@ -6,12 +6,12 @@ import Node._;
class rocketCtrlSboard(entries: Int, nread: Int, nwrite: Int) extends Component class rocketCtrlSboard(entries: Int, nread: Int, nwrite: Int) extends Component
{ {
class read_port extends Bundle { class read_port extends Bundle {
val addr = UFix(log2up(entries), INPUT) val addr = UFix(log2Up(entries), INPUT)
val data = Bool(OUTPUT) val data = Bool(OUTPUT)
} }
class write_port extends Bundle { class write_port extends Bundle {
val en = Bool(INPUT) val en = Bool(INPUT)
val addr = UFix(log2up(entries), INPUT) val addr = UFix(log2Up(entries), INPUT)
val data = Bool(INPUT) val data = Bool(INPUT)
} }

2
rocket/src/main/scala/divider.scala
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@ -66,7 +66,7 @@ class rocketDivider(width: Int) extends Component {
val rhs_in = Cat(rhs_hi, io.req.bits.in1(width/2-1,0)) val rhs_in = Cat(rhs_hi, io.req.bits.in1(width/2-1,0))
when ((state === s_ready) && io.req.valid) { when ((state === s_ready) && io.req.valid) {
count := UFix(0, log2up(width+1)); count := UFix(0, log2Up(width+1));
half := (dw === DW_32); half := (dw === DW_32);
neg_quo := Bool(false); neg_quo := Bool(false);
neg_rem := Bool(false); neg_rem := Bool(false);

2
rocket/src/main/scala/dpath_util.scala
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@ -22,7 +22,7 @@ class rocketDpathBTB(entries: Int) extends Component
{ {
val io = new ioDpathBTB(); val io = new ioDpathBTB();
val repl_way = LFSR16(io.wen)(log2up(entries)-1,0) // TODO: pseudo-LRU val repl_way = LFSR16(io.wen)(log2Up(entries)-1,0) // TODO: pseudo-LRU
var hit_reduction = Bool(false) var hit_reduction = Bool(false)
val hit = Bool() val hit = Bool()

2
rocket/src/main/scala/dtlb.scala
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@ -17,7 +17,7 @@ class ioDTLB_CPU_req_bundle extends Bundle
val asid = Bits(width=ASID_BITS) val asid = Bits(width=ASID_BITS)
val vpn = Bits(width=VPN_BITS+1) val vpn = Bits(width=VPN_BITS+1)
} }
class ioDTLB_CPU_req extends hwacha.ioDecoupled()( { new ioDTLB_CPU_req_bundle() } ) class ioDTLB_CPU_req extends ioDecoupled()( { new ioDTLB_CPU_req_bundle() } )
class ioDTLB_CPU_resp extends Bundle class ioDTLB_CPU_resp extends Bundle
{ {

26
rocket/src/main/scala/htif.scala
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@ -28,7 +28,7 @@ class ioHTIF extends Bundle
val debug = new ioDebug val debug = new ioDebug
val pcr_req = (new ioDecoupled) { new PCRReq }.flip val pcr_req = (new ioDecoupled) { new PCRReq }.flip
val pcr_rep = (new ioPipe) { Bits(width = 64) } val pcr_rep = (new ioPipe) { Bits(width = 64) }
val ipi = (new ioDecoupled) { Bits(width = log2up(NTILES)) } val ipi = (new ioDecoupled) { Bits(width = log2Up(NTILES)) }
} }
class rocketHTIF(w: Int, ncores: Int, co: CoherencePolicyWithUncached) extends Component class rocketHTIF(w: Int, ncores: Int, co: CoherencePolicyWithUncached) extends Component
@ -43,7 +43,7 @@ class rocketHTIF(w: Int, ncores: Int, co: CoherencePolicyWithUncached) extends C
val long_request_bits = 576 val long_request_bits = 576
require(short_request_bits % w == 0) require(short_request_bits % w == 0)
val rx_count_w = 13 + log2up(64) - log2up(w) // data size field is 12 bits val rx_count_w = 13 + log2Up(64) - log2Up(w) // data size field is 12 bits
val rx_count = Reg(resetVal = UFix(0,rx_count_w)) val rx_count = Reg(resetVal = UFix(0,rx_count_w))
val rx_shifter = Reg() { Bits(width = short_request_bits) } val rx_shifter = Reg() { Bits(width = short_request_bits) }
val rx_shifter_in = Cat(io.host.in.bits, rx_shifter(short_request_bits-1,w)) val rx_shifter_in = Cat(io.host.in.bits, rx_shifter(short_request_bits-1,w))
@ -65,18 +65,18 @@ class rocketHTIF(w: Int, ncores: Int, co: CoherencePolicyWithUncached) extends C
} }
} }
val rx_word_count = (rx_count >> UFix(log2up(short_request_bits/w))) val rx_word_count = (rx_count >> UFix(log2Up(short_request_bits/w)))
val rx_word_done = io.host.in.valid && rx_count(log2up(short_request_bits/w)-1,0).andR val rx_word_done = io.host.in.valid && rx_count(log2Up(short_request_bits/w)-1,0).andR
val packet_ram_depth = long_request_bits/short_request_bits-1 val packet_ram_depth = long_request_bits/short_request_bits-1
val packet_ram = Vec(packet_ram_depth) { Reg() { Bits(width = short_request_bits) } } val packet_ram = Vec(packet_ram_depth) { Reg() { Bits(width = short_request_bits) } }
when (rx_word_done && io.host.in.ready) { when (rx_word_done && io.host.in.ready) {
packet_ram(rx_word_count(log2up(packet_ram_depth)-1,0) - UFix(1)) := rx_shifter_in packet_ram(rx_word_count(log2Up(packet_ram_depth)-1,0) - UFix(1)) := rx_shifter_in
} }
val cmd_readmem :: cmd_writemem :: cmd_readcr :: cmd_writecr :: cmd_ack :: cmd_nack :: Nil = Enum(6) { UFix() } val cmd_readmem :: cmd_writemem :: cmd_readcr :: cmd_writecr :: cmd_ack :: cmd_nack :: Nil = Enum(6) { UFix() }
val pcr_addr = addr(4,0) val pcr_addr = addr(4,0)
val pcr_coreid = if (ncores == 1) UFix(0) else addr(20+log2up(ncores),20) val pcr_coreid = if (ncores == 1) UFix(0) else addr(20+log2Up(ncores),20)
val pcr_wdata = packet_ram(0) val pcr_wdata = packet_ram(0)
val bad_mem_packet = size(OFFSET_BITS-1-3,0).orR || addr(OFFSET_BITS-1-3,0).orR val bad_mem_packet = size(OFFSET_BITS-1-3,0).orR || addr(OFFSET_BITS-1-3,0).orR
@ -85,14 +85,14 @@ class rocketHTIF(w: Int, ncores: Int, co: CoherencePolicyWithUncached) extends C
Bool(true))) Bool(true)))
val tx_count = Reg(resetVal = UFix(0, rx_count_w)) val tx_count = Reg(resetVal = UFix(0, rx_count_w))
val tx_subword_count = tx_count(log2up(short_request_bits/w)-1,0) val tx_subword_count = tx_count(log2Up(short_request_bits/w)-1,0)
val tx_word_count = tx_count(rx_count_w-1, log2up(short_request_bits/w)) val tx_word_count = tx_count(rx_count_w-1, log2Up(short_request_bits/w))
val packet_ram_raddr = tx_word_count(log2up(packet_ram_depth)-1,0) - UFix(1) val packet_ram_raddr = tx_word_count(log2Up(packet_ram_depth)-1,0) - UFix(1)
when (io.host.out.valid && io.host.out.ready) { when (io.host.out.valid && io.host.out.ready) {
tx_count := tx_count + UFix(1) tx_count := tx_count + UFix(1)
} }
val rx_done = rx_word_done && Mux(rx_word_count === UFix(0), next_cmd != cmd_writemem && next_cmd != cmd_writecr, rx_word_count === size || rx_word_count(log2up(packet_ram_depth)-1,0) === UFix(0)) val rx_done = rx_word_done && Mux(rx_word_count === UFix(0), next_cmd != cmd_writemem && next_cmd != cmd_writecr, rx_word_count === size || rx_word_count(log2Up(packet_ram_depth)-1,0) === UFix(0))
val tx_size = Mux(!nack && (cmd === cmd_readmem || cmd === cmd_readcr), size, UFix(0)) val tx_size = Mux(!nack && (cmd === cmd_readmem || cmd === cmd_readcr), size, UFix(0))
val tx_done = io.host.out.ready && tx_subword_count.andR && (tx_word_count === tx_size || tx_word_count > UFix(0) && packet_ram_raddr.andR) val tx_done = io.host.out.ready && tx_subword_count.andR && (tx_word_count === tx_size || tx_word_count > UFix(0) && packet_ram_raddr.andR)
@ -122,7 +122,7 @@ class rocketHTIF(w: Int, ncores: Int, co: CoherencePolicyWithUncached) extends C
state := state_tx state := state_tx
} }
val mem_cnt = Reg(resetVal = UFix(0, log2up(REFILL_CYCLES))) val mem_cnt = Reg(resetVal = UFix(0, log2Up(REFILL_CYCLES)))
when (state === state_mem_req && io.mem.xact_init.ready) { when (state === state_mem_req && io.mem.xact_init.ready) {
state := Mux(cmd === cmd_writemem, state_mem_wdata, state_mem_rdata) state := Mux(cmd === cmd_writemem, state_mem_wdata, state_mem_rdata)
} }
@ -170,7 +170,7 @@ class rocketHTIF(w: Int, ncores: Int, co: CoherencePolicyWithUncached) extends C
var mem_req_data: Bits = null var mem_req_data: Bits = null
for (i <- 0 until MEM_DATA_BITS/short_request_bits) { for (i <- 0 until MEM_DATA_BITS/short_request_bits) {
val idx = Cat(mem_cnt, UFix(i, log2up(MEM_DATA_BITS/short_request_bits))) val idx = Cat(mem_cnt, UFix(i, log2Up(MEM_DATA_BITS/short_request_bits)))
when (state === state_mem_rdata && io.mem.xact_rep.valid) { when (state === state_mem_rdata && io.mem.xact_rep.valid) {
packet_ram(idx) := io.mem.xact_rep.bits.data((i+1)*short_request_bits-1, i*short_request_bits) packet_ram(idx) := io.mem.xact_rep.bits.data((i+1)*short_request_bits-1, i*short_request_bits)
} }
@ -240,5 +240,5 @@ class rocketHTIF(w: Int, ncores: Int, co: CoherencePolicyWithUncached) extends C
io.host.in.ready := state === state_rx io.host.in.ready := state === state_rx
io.host.out.valid := state === state_tx io.host.out.valid := state === state_tx
io.host.out.bits := tx_data >> Cat(tx_count(log2up(short_request_bits/w)-1,0), Bits(0, log2up(w))) io.host.out.bits := tx_data >> Cat(tx_count(log2Up(short_request_bits/w)-1,0), Bits(0, log2Up(w)))
} }

12
rocket/src/main/scala/icache.scala
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@ -33,7 +33,7 @@ class rocketICache(sets: Int, assoc: Int, co: CoherencePolicyWithUncached) exten
val lines = sets * assoc; val lines = sets * assoc;
val addrbits = PADDR_BITS; val addrbits = PADDR_BITS;
val indexbits = log2up(sets); val indexbits = log2Up(sets);
val offsetbits = OFFSET_BITS; val offsetbits = OFFSET_BITS;
val tagmsb = addrbits - 1; val tagmsb = addrbits - 1;
val taglsb = indexbits+offsetbits; val taglsb = indexbits+offsetbits;
@ -42,11 +42,11 @@ class rocketICache(sets: Int, assoc: Int, co: CoherencePolicyWithUncached) exten
val indexlsb = offsetbits; val indexlsb = offsetbits;
val offsetmsb = indexlsb-1; val offsetmsb = indexlsb-1;
val databits = 32; val databits = 32;
val offsetlsb = log2up(databits/8); val offsetlsb = log2Up(databits/8);
val rf_cnt_bits = log2up(REFILL_CYCLES); val rf_cnt_bits = log2Up(REFILL_CYCLES);
require(PGIDX_BITS >= taglsb); // virtually-indexed, physically-tagged constraint require(PGIDX_BITS >= taglsb); // virtually-indexed, physically-tagged constraint
require(ispow2(sets) && ispow2(assoc)); require(isPow2(sets) && isPow2(assoc));
val s_reset :: s_ready :: s_request :: s_refill_wait :: s_refill :: Nil = Enum(5) { UFix() }; val s_reset :: s_ready :: s_request :: s_refill_wait :: s_refill :: Nil = Enum(5) { UFix() };
val state = Reg(resetVal = s_reset); val state = Reg(resetVal = s_reset);
@ -82,8 +82,8 @@ class rocketICache(sets: Int, assoc: Int, co: CoherencePolicyWithUncached) exten
} }
val refill_done = io.mem.xact_rep.valid && refill_count.andR val refill_done = io.mem.xact_rep.valid && refill_count.andR
val repl_way = if (assoc == 1) UFix(0) else LFSR16(state === s_ready && r_cpu_req_val && !io.cpu.itlb_miss && !tag_hit)(log2up(assoc)-1,0) val repl_way = if (assoc == 1) UFix(0) else LFSR16(state === s_ready && r_cpu_req_val && !io.cpu.itlb_miss && !tag_hit)(log2Up(assoc)-1,0)
val word_shift = Cat(r_cpu_req_idx(offsetmsb-rf_cnt_bits,offsetlsb), UFix(0, log2up(databits))).toUFix val word_shift = Cat(r_cpu_req_idx(offsetmsb-rf_cnt_bits,offsetlsb), UFix(0, log2Up(databits))).toUFix
val tag_we = refill_done val tag_we = refill_done
val tag_addr = val tag_addr =
Mux((state === s_refill), r_cpu_req_idx(indexmsb,indexlsb), Mux((state === s_refill), r_cpu_req_idx(indexmsb,indexlsb),

4
rocket/src/main/scala/icache_prefetch.scala
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@ -43,7 +43,7 @@ class rocketIPrefetcher(co: CoherencePolicyWithUncached) extends Component
finish_arb.io.in(1) <> finish_q.io.deq finish_arb.io.in(1) <> finish_q.io.deq
io.mem.xact_finish <> finish_arb.io.out io.mem.xact_finish <> finish_arb.io.out
val fill_cnt = Reg(resetVal = UFix(0, log2up(REFILL_CYCLES))) val fill_cnt = Reg(resetVal = UFix(0, log2Up(REFILL_CYCLES)))
when (ip_mem_resp_val) { fill_cnt := fill_cnt + UFix(1) } when (ip_mem_resp_val) { fill_cnt := fill_cnt + UFix(1) }
val fill_done = fill_cnt.andR && ip_mem_resp_val val fill_done = fill_cnt.andR && ip_mem_resp_val
@ -51,7 +51,7 @@ class rocketIPrefetcher(co: CoherencePolicyWithUncached) extends Component
finish_q.io.enq.bits.global_xact_id := io.mem.xact_rep.bits.global_xact_id finish_q.io.enq.bits.global_xact_id := io.mem.xact_rep.bits.global_xact_id
val forward = Reg(resetVal = Bool(false)) val forward = Reg(resetVal = Bool(false))
val forward_cnt = Reg(resetVal = UFix(0, log2up(REFILL_CYCLES))) val forward_cnt = Reg(resetVal = UFix(0, log2Up(REFILL_CYCLES)))
when (forward && pdq.io.deq.valid) { forward_cnt := forward_cnt + UFix(1) } when (forward && pdq.io.deq.valid) { forward_cnt := forward_cnt + UFix(1) }
val forward_done = forward_cnt.andR && pdq.io.deq.valid val forward_done = forward_cnt.andR && pdq.io.deq.valid
forward := demand_miss && hit || forward && !forward_done forward := demand_miss && hit || forward && !forward_done

6
rocket/src/main/scala/itlb.scala
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@ -55,7 +55,7 @@ class PseudoLRU(n: Int)
def access(way: UFix) = { def access(way: UFix) = {
var next_state = state var next_state = state
var idx = UFix(1,1) var idx = UFix(1,1)
for (i <- log2up(n)-1 to 0 by -1) { for (i <- log2Up(n)-1 to 0 by -1) {
val bit = way(i) val bit = way(i)
val mask = (UFix(1,n) << idx)(n-1,0) val mask = (UFix(1,n) << idx)(n-1,0)
next_state = next_state & ~mask | Mux(bit, UFix(0), mask) next_state = next_state & ~mask | Mux(bit, UFix(0), mask)
@ -66,9 +66,9 @@ class PseudoLRU(n: Int)
} }
def replace = { def replace = {
var idx = UFix(1,1) var idx = UFix(1,1)
for (i <- 0 until log2up(n)) for (i <- 0 until log2Up(n))
idx = Cat(idx, state(idx)) idx = Cat(idx, state(idx))
idx(log2up(n)-1,0) idx(log2Up(n)-1,0)
} }
} }

12
rocket/src/main/scala/memserdes.scala
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@ -26,8 +26,8 @@ class MemSerdes extends Component
val s_idle :: s_read_addr :: s_write_addr :: s_write_idle :: s_write_data :: Nil = Enum(5) { UFix() } val s_idle :: s_read_addr :: s_write_addr :: s_write_idle :: s_write_data :: Nil = Enum(5) { UFix() }
val state = Reg(resetVal = s_idle) val state = Reg(resetVal = s_idle)
val send_cnt = Reg(resetVal = UFix(0, log2up((max(abits, dbits)+MEM_BACKUP_WIDTH-1)/MEM_BACKUP_WIDTH))) val send_cnt = Reg(resetVal = UFix(0, log2Up((max(abits, dbits)+MEM_BACKUP_WIDTH-1)/MEM_BACKUP_WIDTH)))
val data_send_cnt = Reg(resetVal = UFix(0, log2up(REFILL_CYCLES))) val data_send_cnt = Reg(resetVal = UFix(0, log2Up(REFILL_CYCLES)))
val adone = io.narrow.req.ready && send_cnt === UFix((abits-1)/MEM_BACKUP_WIDTH) val adone = io.narrow.req.ready && send_cnt === UFix((abits-1)/MEM_BACKUP_WIDTH)
val ddone = io.narrow.req.ready && send_cnt === UFix((dbits-1)/MEM_BACKUP_WIDTH) val ddone = io.narrow.req.ready && send_cnt === UFix((dbits-1)/MEM_BACKUP_WIDTH)
@ -67,8 +67,8 @@ class MemSerdes extends Component
send_cnt := UFix(0) send_cnt := UFix(0)
} }
val recv_cnt = Reg(resetVal = UFix(0, log2up((rbits+MEM_BACKUP_WIDTH-1)/MEM_BACKUP_WIDTH))) val recv_cnt = Reg(resetVal = UFix(0, log2Up((rbits+MEM_BACKUP_WIDTH-1)/MEM_BACKUP_WIDTH)))
val data_recv_cnt = Reg(resetVal = UFix(0, log2up(REFILL_CYCLES))) val data_recv_cnt = Reg(resetVal = UFix(0, log2Up(REFILL_CYCLES)))
val resp_val = Reg(resetVal = Bool(false)) val resp_val = Reg(resetVal = Bool(false))
resp_val := Bool(false) resp_val := Bool(false)
@ -98,8 +98,8 @@ class MemDessert extends Component // test rig side
val rbits = io.wide.resp.bits.getWidth val rbits = io.wide.resp.bits.getWidth
require(dbits >= abits && rbits >= dbits) require(dbits >= abits && rbits >= dbits)
val recv_cnt = Reg(resetVal = UFix(0, log2up((rbits+MEM_BACKUP_WIDTH-1)/MEM_BACKUP_WIDTH))) val recv_cnt = Reg(resetVal = UFix(0, log2Up((rbits+MEM_BACKUP_WIDTH-1)/MEM_BACKUP_WIDTH)))
val data_recv_cnt = Reg(resetVal = UFix(0, log2up(REFILL_CYCLES))) val data_recv_cnt = Reg(resetVal = UFix(0, log2Up(REFILL_CYCLES)))
val adone = io.narrow.req.valid && recv_cnt === UFix((abits-1)/MEM_BACKUP_WIDTH) val adone = io.narrow.req.valid && recv_cnt === UFix((abits-1)/MEM_BACKUP_WIDTH)
val ddone = io.narrow.req.valid && recv_cnt === UFix((dbits-1)/MEM_BACKUP_WIDTH) val ddone = io.narrow.req.valid && recv_cnt === UFix((dbits-1)/MEM_BACKUP_WIDTH)
val rdone = io.narrow.resp.valid && recv_cnt === UFix((rbits-1)/MEM_BACKUP_WIDTH) val rdone = io.narrow.resp.valid && recv_cnt === UFix((rbits-1)/MEM_BACKUP_WIDTH)

6
rocket/src/main/scala/multiplier.scala
View File

@ -26,7 +26,7 @@ class rocketVUMultiplier(nwbq: Int) extends Component {
} }
val valid = Reg(resetVal = Bits(0, IMUL_STAGES)) val valid = Reg(resetVal = Bits(0, IMUL_STAGES))
val wbq_cnt = Reg(resetVal = Bits(0, log2up(nwbq+1))) val wbq_cnt = Reg(resetVal = Bits(0, log2Up(nwbq+1)))
val tag = Vec(IMUL_STAGES) { Reg() { Bits() } } val tag = Vec(IMUL_STAGES) { Reg() { Bits() } }
val fire = io.cpu.req.valid && io.cpu.req.ready val fire = io.cpu.req.valid && io.cpu.req.ready
@ -80,7 +80,7 @@ class rocketMultiplier extends Component {
val r_lhs = Reg { Bits() } val r_lhs = Reg { Bits() }
val r_prod= Reg { Bits(width = w*2) } val r_prod= Reg { Bits(width = w*2) }
val r_lsb = Reg { Bits() } val r_lsb = Reg { Bits() }
val r_cnt = Reg { UFix(width = log2up(cycles+1)) } val r_cnt = Reg { UFix(width = log2Up(cycles+1)) }
val dw = io.req.bits.fn(io.req.bits.fn.width-1) val dw = io.req.bits.fn(io.req.bits.fn.width-1)
val fn = io.req.bits.fn(io.req.bits.fn.width-2,0) val fn = io.req.bits.fn(io.req.bits.fn.width-2,0)
@ -99,7 +99,7 @@ class rocketMultiplier extends Component {
when (io.req.valid && io.req.ready) { when (io.req.valid && io.req.ready) {
r_val := Bool(true) r_val := Bool(true)
r_cnt := UFix(0, log2up(cycles+1)) r_cnt := UFix(0, log2Up(cycles+1))
r_dw := dw r_dw := dw
r_fn := fn r_fn := fn
r_tag := io.req_tag r_tag := io.req_tag

30
rocket/src/main/scala/nbdcache.scala
View File

@ -6,7 +6,7 @@ import Constants._
class ioReplacementWayGen extends Bundle { class ioReplacementWayGen extends Bundle {
val pick_new_way = Bool(dir = INPUT) val pick_new_way = Bool(dir = INPUT)
val way_en = Bits(width = NWAYS, dir = INPUT) val way_en = Bits(width = NWAYS, dir = INPUT)
val way_id = UFix(width = log2up(NWAYS), dir = OUTPUT) val way_id = UFix(width = log2Up(NWAYS), dir = OUTPUT)
} }
class RandomReplacementWayGen extends Component { class RandomReplacementWayGen extends Component {
@ -15,7 +15,7 @@ class RandomReplacementWayGen extends Component {
io.way_id := UFix(0) io.way_id := UFix(0)
if(NWAYS > 1) if(NWAYS > 1)
{ {
val rand_way_id = LFSR16(io.pick_new_way)(log2up(NWAYS)-1,0) val rand_way_id = LFSR16(io.pick_new_way)(log2Up(NWAYS)-1,0)
when (rand_way_id < UFix(NWAYS)) { io.way_id := rand_way_id } when (rand_way_id < UFix(NWAYS)) { io.way_id := rand_way_id }
} }
} }
@ -58,7 +58,7 @@ class StoreDataGen extends Component {
class LoadDataGen extends Component { class LoadDataGen extends Component {
val io = new Bundle { val io = new Bundle {
val typ = Bits(3, INPUT) val typ = Bits(3, INPUT)
val addr = Bits(log2up(MEM_DATA_BITS/8), INPUT) val addr = Bits(log2Up(MEM_DATA_BITS/8), INPUT)
val din = Bits(MEM_DATA_BITS, INPUT) val din = Bits(MEM_DATA_BITS, INPUT)
val dout = Bits(64, OUTPUT) val dout = Bits(64, OUTPUT)
val r_dout = Bits(64, OUTPUT) val r_dout = Bits(64, OUTPUT)
@ -112,7 +112,7 @@ class RPQEntry extends Bundle {
val offset = Bits(width = OFFSET_BITS) val offset = Bits(width = OFFSET_BITS)
val cmd = Bits(width = 4) val cmd = Bits(width = 4)
val typ = Bits(width = 3) val typ = Bits(width = 3)
val sdq_id = UFix(width = log2up(NSDQ)) val sdq_id = UFix(width = log2Up(NSDQ))
val cpu_tag = Bits(width = DCACHE_TAG_BITS) val cpu_tag = Bits(width = DCACHE_TAG_BITS)
} }
@ -133,7 +133,7 @@ class DataReq extends Bundle {
class DataArrayReq extends Bundle { class DataArrayReq extends Bundle {
val way_en = Bits(width = NWAYS) val way_en = Bits(width = NWAYS)
val idx = Bits(width = IDX_BITS) val idx = Bits(width = IDX_BITS)
val offset = Bits(width = log2up(REFILL_CYCLES)) val offset = Bits(width = log2Up(REFILL_CYCLES))
val rw = Bool() val rw = Bool()
val wmask = Bits(width = MEM_DATA_BITS/8) val wmask = Bits(width = MEM_DATA_BITS/8)
val data = Bits(width = MEM_DATA_BITS) val data = Bits(width = MEM_DATA_BITS)
@ -165,11 +165,11 @@ class MSHR(id: Int, co: CoherencePolicy) extends Component {
val req_sec_val = Bool(INPUT) val req_sec_val = Bool(INPUT)
val req_sec_rdy = Bool(OUTPUT) val req_sec_rdy = Bool(OUTPUT)
val req_bits = new MSHRReq().asInput val req_bits = new MSHRReq().asInput
val req_sdq_id = UFix(log2up(NSDQ), INPUT) val req_sdq_id = UFix(log2Up(NSDQ), INPUT)
val idx_match = Bool(OUTPUT) val idx_match = Bool(OUTPUT)
val idx = Bits(IDX_BITS, OUTPUT) val idx = Bits(IDX_BITS, OUTPUT)
val refill_count = Bits(log2up(REFILL_CYCLES), OUTPUT) val refill_count = Bits(log2Up(REFILL_CYCLES), OUTPUT)
val tag = Bits(TAG_BITS, OUTPUT) val tag = Bits(TAG_BITS, OUTPUT)
val way_oh = Bits(NWAYS, OUTPUT) val way_oh = Bits(NWAYS, OUTPUT)
@ -190,7 +190,7 @@ class MSHR(id: Int, co: CoherencePolicy) extends Component {
val xacx_type = Reg { UFix() } val xacx_type = Reg { UFix() }
val line_state = Reg { UFix() } val line_state = Reg { UFix() }
val refill_count = Reg { UFix(width = log2up(REFILL_CYCLES)) } val refill_count = Reg { UFix(width = log2Up(REFILL_CYCLES)) }
val req = Reg { new MSHRReq() } val req = Reg { new MSHRReq() }
val req_cmd = io.req_bits.cmd val req_cmd = io.req_bits.cmd
@ -298,7 +298,7 @@ class MSHRFile(co: CoherencePolicy) extends Component {
val secondary_miss = Bool(OUTPUT) val secondary_miss = Bool(OUTPUT)
val mem_resp_idx = Bits(IDX_BITS, OUTPUT) val mem_resp_idx = Bits(IDX_BITS, OUTPUT)
val mem_resp_offset = Bits(log2up(REFILL_CYCLES), OUTPUT) val mem_resp_offset = Bits(log2Up(REFILL_CYCLES), OUTPUT)
val mem_resp_way_oh = Bits(NWAYS, OUTPUT) val mem_resp_way_oh = Bits(NWAYS, OUTPUT)
val fence_rdy = Bool(OUTPUT) val fence_rdy = Bool(OUTPUT)
@ -429,7 +429,7 @@ class WritebackUnit(co: CoherencePolicy) extends Component {
val is_probe = Reg() { Bool() } val is_probe = Reg() { Bool() }
val data_req_fired = Reg(resetVal = Bool(false)) val data_req_fired = Reg(resetVal = Bool(false))
val cmd_sent = Reg() { Bool() } val cmd_sent = Reg() { Bool() }
val cnt = Reg() { UFix(width = log2up(REFILL_CYCLES+1)) } val cnt = Reg() { UFix(width = log2Up(REFILL_CYCLES+1)) }
val req = Reg() { new WritebackReq() } val req = Reg() { new WritebackReq() }
val dout_rdy = Mux(is_probe, io.probe_rep_data.ready, io.mem_req_data.ready) val dout_rdy = Mux(is_probe, io.probe_rep_data.ready, io.mem_req_data.ready)
@ -555,9 +555,9 @@ class FlushUnit(lines: Int, co: CoherencePolicy) extends Component {
val s_reset :: s_ready :: s_meta_read :: s_meta_wait :: Nil = Enum(4) { UFix() } val s_reset :: s_ready :: s_meta_read :: s_meta_wait :: Nil = Enum(4) { UFix() }
val state = Reg(resetVal = s_reset) val state = Reg(resetVal = s_reset)
val idx_cnt = Reg(resetVal = UFix(0, log2up(lines))) val idx_cnt = Reg(resetVal = UFix(0, log2Up(lines)))
val next_idx_cnt = idx_cnt + UFix(1) val next_idx_cnt = idx_cnt + UFix(1)
val way_cnt = if (NWAYS == 1) UFix(0) else Reg(resetVal = UFix(0, log2up(NWAYS))) val way_cnt = if (NWAYS == 1) UFix(0) else Reg(resetVal = UFix(0, log2Up(NWAYS)))
val next_way_cnt = way_cnt + UFix(1) val next_way_cnt = way_cnt + UFix(1)
switch (state) { switch (state) {
@ -777,8 +777,8 @@ class HellaCache(co: CoherencePolicy) extends Component {
val indexmsb = taglsb-1 val indexmsb = taglsb-1
val indexlsb = offsetbits val indexlsb = offsetbits
val offsetmsb = indexlsb-1 val offsetmsb = indexlsb-1
val offsetlsb = log2up(CPU_DATA_BITS/8) val offsetlsb = log2Up(CPU_DATA_BITS/8)
val ramindexlsb = log2up(MEM_DATA_BITS/8) val ramindexlsb = log2Up(MEM_DATA_BITS/8)
val early_nack = Reg { Bool() } val early_nack = Reg { Bool() }
val r_cpu_req_val_ = Reg(io.cpu.req.valid && io.cpu.req.ready, resetVal = Bool(false)) val r_cpu_req_val_ = Reg(io.cpu.req.valid && io.cpu.req.ready, resetVal = Bool(false))
@ -1008,7 +1008,7 @@ class HellaCache(co: CoherencePolicy) extends Component {
val store_offset = Mux(!replay_fire, p_store_idx(offsetmsb,0), replay.offset) val store_offset = Mux(!replay_fire, p_store_idx(offsetmsb,0), replay.offset)
maskgen.io.typ := Mux(!replay_fire, p_store_type, replay.typ) maskgen.io.typ := Mux(!replay_fire, p_store_type, replay.typ)
maskgen.io.addr := store_offset(offsetlsb-1,0) maskgen.io.addr := store_offset(offsetlsb-1,0)
val store_wmask_wide = maskgen.io.wmask << Cat(store_offset(ramindexlsb-1,offsetlsb), Bits(0, log2up(CPU_DATA_BITS/8))).toUFix val store_wmask_wide = maskgen.io.wmask << Cat(store_offset(ramindexlsb-1,offsetlsb), Bits(0, log2Up(CPU_DATA_BITS/8))).toUFix
val store_data = Mux(!replay_fire, p_store_data, replay.data) val store_data = Mux(!replay_fire, p_store_data, replay.data)
val store_data_wide = Fill(MEM_DATA_BITS/CPU_DATA_BITS, store_data) val store_data_wide = Fill(MEM_DATA_BITS/CPU_DATA_BITS, store_data)
data_arb.io.in(1).bits.data := store_data_wide data_arb.io.in(1).bits.data := store_data_wide

10
rocket/src/main/scala/ptw.scala
View File

@ -14,7 +14,7 @@ class ioHellaCacheArbiter(n: Int) extends Bundle
class rocketHellaCacheArbiter(n: Int) extends Component class rocketHellaCacheArbiter(n: Int) extends Component
{ {
val io = new ioHellaCacheArbiter(n) val io = new ioHellaCacheArbiter(n)
require(DCACHE_TAG_BITS >= log2up(n) + CPU_TAG_BITS) require(DCACHE_TAG_BITS >= log2Up(n) + CPU_TAG_BITS)
var req_val = Bool(false) var req_val = Bool(false)
var req_rdy = io.mem.req.ready var req_rdy = io.mem.req.ready
@ -41,7 +41,7 @@ class rocketHellaCacheArbiter(n: Int) extends Component
req_ppn = Mux(Reg(r.valid), r.bits.ppn, req_ppn) req_ppn = Mux(Reg(r.valid), r.bits.ppn, req_ppn)
req_data = Mux(Reg(r.valid), r.bits.data, req_data) req_data = Mux(Reg(r.valid), r.bits.data, req_data)
req_kill = Mux(Reg(r.valid), r.bits.kill, req_kill) req_kill = Mux(Reg(r.valid), r.bits.kill, req_kill)
req_tag = Mux(r.valid, Cat(r.bits.tag, UFix(i, log2up(n))), req_tag) req_tag = Mux(r.valid, Cat(r.bits.tag, UFix(i, log2Up(n))), req_tag)
} }
io.mem.req.valid := req_val io.mem.req.valid := req_val
@ -57,7 +57,7 @@ class rocketHellaCacheArbiter(n: Int) extends Component
{ {
val r = io.requestor(i).resp val r = io.requestor(i).resp
val x = io.requestor(i).xcpt val x = io.requestor(i).xcpt
val tag_hit = io.mem.resp.bits.tag(log2up(n)-1,0) === UFix(i) val tag_hit = io.mem.resp.bits.tag(log2Up(n)-1,0) === UFix(i)
x.ma.ld := io.mem.xcpt.ma.ld && Reg(io.requestor(i).req.valid) x.ma.ld := io.mem.xcpt.ma.ld && Reg(io.requestor(i).req.valid)
x.ma.st := io.mem.xcpt.ma.st && Reg(io.requestor(i).req.valid) x.ma.st := io.mem.xcpt.ma.st && Reg(io.requestor(i).req.valid)
r.valid := io.mem.resp.valid && tag_hit r.valid := io.mem.resp.valid && tag_hit
@ -67,7 +67,7 @@ class rocketHellaCacheArbiter(n: Int) extends Component
r.bits.data := io.mem.resp.bits.data r.bits.data := io.mem.resp.bits.data
r.bits.data_subword := io.mem.resp.bits.data_subword r.bits.data_subword := io.mem.resp.bits.data_subword
r.bits.typ := io.mem.resp.bits.typ r.bits.typ := io.mem.resp.bits.typ
r.bits.tag := io.mem.resp.bits.tag >> UFix(log2up(n)) r.bits.tag := io.mem.resp.bits.tag >> UFix(log2Up(n))
} }
} }
@ -86,7 +86,7 @@ class rocketPTW(n: Int) extends Component
val bitsPerLevel = VPN_BITS/levels val bitsPerLevel = VPN_BITS/levels
require(VPN_BITS == levels * bitsPerLevel) require(VPN_BITS == levels * bitsPerLevel)
val count = Reg() { UFix(width = log2up(levels)) } val count = Reg() { UFix(width = log2Up(levels)) }
val s_ready :: s_req :: s_wait :: s_done :: s_error :: Nil = Enum(5) { UFix() }; val s_ready :: s_req :: s_wait :: s_done :: s_error :: Nil = Enum(5) { UFix() };
val state = Reg(resetVal = s_ready); val state = Reg(resetVal = s_ready);

4
rocket/src/main/scala/queues.scala
View File

@ -22,8 +22,8 @@ class queue[T <: Data](entries: Int, pipe: Boolean = false, flushable: Boolean =
if (entries > 1) if (entries > 1)
{ {
enq_ptr = Reg(resetVal = UFix(0, log2up(entries))) enq_ptr = Reg(resetVal = UFix(0, log2Up(entries)))
deq_ptr = Reg(resetVal = UFix(0, log2up(entries))) deq_ptr = Reg(resetVal = UFix(0, log2Up(entries)))
val pow2 = Bool((entries & (entries-1)) == 0) val pow2 = Bool((entries & (entries-1)) == 0)
when (do_deq) { when (do_deq) {

4
rocket/src/main/scala/slowio.scala
View File

@ -19,7 +19,7 @@ class slowIO[T <: Data](val divisor: Int, hold_cycles_in: Int = -1)(data: => T)
require((divisor & (divisor-1)) == 0) require((divisor & (divisor-1)) == 0)
require(hold_cycles < divisor/2 && hold_cycles >= 1) require(hold_cycles < divisor/2 && hold_cycles >= 1)
val cnt = Reg() { UFix(width = log2up(divisor)) } val cnt = Reg() { UFix(width = log2Up(divisor)) }
cnt := cnt + UFix(1) cnt := cnt + UFix(1)
val out_en = cnt === UFix(divisor/2+hold_cycles-1) // rising edge + hold time val out_en = cnt === UFix(divisor/2+hold_cycles-1) // rising edge + hold time
val in_en = cnt === UFix(divisor/2-1) // rising edge val in_en = cnt === UFix(divisor/2-1) // rising edge
@ -46,5 +46,5 @@ class slowIO[T <: Data](val divisor: Int, hold_cycles_in: Int = -1)(data: => T)
io.in_slow.ready := in_slow_rdy io.in_slow.ready := in_slow_rdy
io.out_slow.valid := out_slow_val io.out_slow.valid := out_slow_val
io.out_slow.bits := out_slow_bits io.out_slow.bits := out_slow_bits
io.clk_slow := cnt(log2up(divisor)-1).toBool io.clk_slow := cnt(log2Up(divisor)-1).toBool
} }

10
rocket/src/main/scala/uncore.scala
View File

@ -120,7 +120,7 @@ class XactTracker(ntiles: Int, id: Int, co: CoherencePolicy) extends Component {
val x_type_ = Reg{ Bits() } val x_type_ = Reg{ Bits() }
val init_tile_id_ = Reg{ Bits() } val init_tile_id_ = Reg{ Bits() }
val tile_xact_id_ = Reg{ Bits() } val tile_xact_id_ = Reg{ Bits() }
val p_rep_count = if (ntiles == 1) UFix(0) else Reg(resetVal = UFix(0, width = log2up(ntiles))) val p_rep_count = if (ntiles == 1) UFix(0) else Reg(resetVal = UFix(0, width = log2Up(ntiles)))
val p_req_flags = Reg(resetVal = Bits(0, width = ntiles)) val p_req_flags = Reg(resetVal = Bits(0, width = ntiles))
val p_rep_tile_id_ = Reg{ Bits() } val p_rep_tile_id_ = Reg{ Bits() }
val x_needs_read = Reg(resetVal = Bool(false)) val x_needs_read = Reg(resetVal = Bool(false))
@ -128,9 +128,9 @@ class XactTracker(ntiles: Int, id: Int, co: CoherencePolicy) extends Component {
val p_rep_data_needs_write = Reg(resetVal = Bool(false)) val p_rep_data_needs_write = Reg(resetVal = Bool(false))
val x_w_mem_cmd_sent = Reg(resetVal = Bool(false)) val x_w_mem_cmd_sent = Reg(resetVal = Bool(false))
val p_w_mem_cmd_sent = Reg(resetVal = Bool(false)) val p_w_mem_cmd_sent = Reg(resetVal = Bool(false))
val mem_cnt = Reg(resetVal = UFix(0, width = log2up(REFILL_CYCLES))) val mem_cnt = Reg(resetVal = UFix(0, width = log2Up(REFILL_CYCLES)))
val mem_cnt_next = mem_cnt + UFix(1) val mem_cnt_next = mem_cnt + UFix(1)
val mem_cnt_max = ~UFix(0, width = log2up(REFILL_CYCLES)) val mem_cnt_max = ~UFix(0, width = log2Up(REFILL_CYCLES))
io.busy := state != s_idle io.busy := state != s_idle
io.addr := addr_ io.addr := addr_
@ -415,7 +415,7 @@ class CoherenceHubBroadcast(ntiles: Int, co: CoherencePolicy) extends CoherenceH
val x_init = io.tiles(j).xact_init val x_init = io.tiles(j).xact_init
val x_init_data = io.tiles(j).xact_init_data val x_init_data = io.tiles(j).xact_init_data
val x_abort = io.tiles(j).xact_abort val x_abort = io.tiles(j).xact_abort
val abort_cnt = Reg(resetVal = UFix(0, width = log2up(REFILL_CYCLES))) val abort_cnt = Reg(resetVal = UFix(0, width = log2Up(REFILL_CYCLES)))
val conflicts = Vec(NGLOBAL_XACTS) { Bool() } val conflicts = Vec(NGLOBAL_XACTS) { Bool() }
for( i <- 0 until NGLOBAL_XACTS) { for( i <- 0 until NGLOBAL_XACTS) {
val t = trackerList(i).io val t = trackerList(i).io
@ -438,7 +438,7 @@ class CoherenceHubBroadcast(ntiles: Int, co: CoherencePolicy) extends CoherenceH
is(s_abort_drain) { // raises x_init_data.ready below is(s_abort_drain) { // raises x_init_data.ready below
when(x_init_data.valid) { when(x_init_data.valid) {
abort_cnt := abort_cnt + UFix(1) abort_cnt := abort_cnt + UFix(1)
when(abort_cnt === ~UFix(0, width = log2up(REFILL_CYCLES))) { when(abort_cnt === ~UFix(0, width = log2Up(REFILL_CYCLES))) {
abort_state_arr(j) := s_abort_send abort_state_arr(j) := s_abort_send
} }
} }

190
rocket/src/main/scala/util.scala
View File

@ -4,23 +4,6 @@ import Chisel._
import Node._ import Node._
import scala.math._ import scala.math._
object foldR
{
def apply[T <: Bits](x: Seq[T])(f: (T, T) => T): T =
if (x.length == 1) x(0) else f(x(0), foldR(x.slice(1, x.length))(f))
}
object log2up
{
def apply(in: Int) = ceil(log(in)/log(2)).toInt
}
object ispow2
{
def apply(in: Int) = in > 0 && ((in & (in-1)) == 0)
}
object FillInterleaved object FillInterleaved
{ {
def apply(n: Int, in: Bits) = def apply(n: Int, in: Bits) =
@ -32,109 +15,6 @@ object FillInterleaved
} }
} }
// http://aggregate.ee.engr.uky.edu/MAGIC/#Population%20Count%20%28Ones%20Count%29
// http://bits.stephan-brumme.com/countBits.html
object PopCount
{
def apply(in: Bits) =
{
require(in.width <= 32)
val w = log2up(in.width+1)
var x = in
if(in.width == 2) {
x = x - ((x >> UFix(1)) & Bits("h_5555_5555"))
} else if(in.width <= 4) {
x = x - ((x >> UFix(1)) & Bits("h_5555_5555"))
x = (((x >> UFix(2)) & Bits("h_3333_3333")) + (x & Bits("h_3333_3333")))
} else if(in.width <= 8) {
x = x - ((x >> UFix(1)) & Bits("h_5555_5555"))
x = (((x >> UFix(2)) & Bits("h_3333_3333")) + (x & Bits("h_3333_3333")))
x = ((x >> UFix(4)) + x)
} else {
// count bits of each 2-bit chunk
x = x - ((x >> UFix(1)) & Bits("h_5555_5555"))
// count bits of each 4-bit chunk
x = (((x >> UFix(2)) & Bits("h_3333_3333")) + (x & Bits("h_3333_3333")))
// count bits of each 8-bit chunk
x = ((x >> UFix(4)) + x)
// mask junk in upper bits
x = x & Bits("h_0f0f_0f0f")
// add all four 8-bit chunks
x = x + (x >> UFix(8))
x = x + (x >> UFix(16))
}
x(w-1,0)
}
}
object Reverse
{
def doit(in: Bits, base: Int, length: Int): Bits =
{
val half = (1 << log2up(length))/2
if (length == 1)
in(base)
else
Cat(doit(in, base, half), doit(in, base+half, length-half))
}
def apply(in: Bits) = doit(in, 0, in.getWidth)
}
object OHToUFix
{
def apply(in: Seq[Bits]): UFix = {
if (in.size <= 1) return UFix(0)
if (in.size == 2) return in(1)
val hi = in.slice(in.size/2, in.size)
val lo = in.slice(0, in.size/2)
Cat(hi.reduceLeft(_||_), apply(hi zip lo map { case (x, y) => x || y }))
}
def apply(in: Bits): UFix = apply((0 until in.getWidth).map(in(_)))
}
object UFixToOH
{
def apply(in: UFix, width: Int): Bits =
{
(UFix(1) << in(log2up(width)-1,0))
}
}
object LFSR16
{
def apply(increment: Bool = Bool(true)) =
{
val width = 16
val lfsr = Reg(resetVal = UFix(1, width))
when (increment) { lfsr := Cat(lfsr(0)^lfsr(2)^lfsr(3)^lfsr(5), lfsr(width-1,1)).toUFix }
lfsr
}
}
object ShiftRegister
{
def apply [T <: Data](n: Int, in: T): T =
if (n > 0) Reg(apply(n-1, in)) else in
}
object Mux1H
{
def buildMux[T <: Data](sel: Bits, in: Seq[T], i: Int, n: Int): T = {
if (n == 1)
in(i)
else
{
val half_n = (1 << log2up(n))/2
val left = buildMux(sel, in, i, half_n)
val right = buildMux(sel, in, i + half_n, n - half_n)
Mux(sel(i+n-1,i+half_n).orR, right, left)
}
}
def apply [T <: Data](sel: Bits, in: Seq[T]): T = buildMux(sel, in, 0, sel.getWidth)
def apply [T <: Data](sel: Seq[Bool], in: Seq[T]): T = buildMux(Cat(Bits(0),sel.reverse:_*), in, 0, sel.size)
}
class Mux1H [T <: Data](n: Int)(gen: => T) extends Component class Mux1H [T <: Data](n: Int)(gen: => T) extends Component
{ {
val io = new Bundle { val io = new Bundle {
@ -146,76 +26,6 @@ class Mux1H [T <: Data](n: Int)(gen: => T) extends Component
io.out := Mux1H(io.sel, io.in) io.out := Mux1H(io.sel, io.in)
} }
class ioDecoupled[+T <: Data]()(data: => T) extends Bundle
{
val ready = Bool(INPUT)
val valid = Bool(OUTPUT)
val bits = data.asOutput
}
class ioPipe[+T <: Data]()(data: => T) extends Bundle
{
val valid = Bool(OUTPUT)
val bits = data.asOutput
}
class ioArbiter[T <: Data](n: Int)(data: => T) extends Bundle {
val in = Vec(n) { (new ioDecoupled()) { data } }.flip
val out = (new ioDecoupled()) { data }
val chosen = Bits(log2up(n), OUTPUT)
}
object ArbiterCtrl
{
def apply(request: Seq[Bool]) = {
Bool(true) +: (1 until request.length).map(i => !foldR(request.slice(0, i))(_||_))
}
}
class Arbiter[T <: Data](n: Int)(data: => T) extends Component {
val io = new ioArbiter(n)(data)
val grant = ArbiterCtrl(io.in.map(_.valid))
(0 until n).map(i => io.in(i).ready := grant(i) && io.out.ready)
var dout = io.in(n-1).bits
var choose = Bits(n-1)
for (i <- n-2 to 0 by -1) {
dout = Mux(io.in(i).valid, io.in(i).bits, dout)
choose = Mux(io.in(i).valid, Bits(i), choose)
}
io.out.valid := foldR(io.in.map(_.valid))(_||_)
io.out.bits <> dout
io.chosen := choose
}
class RRArbiter[T <: Data](n: Int)(data: => T) extends Component {
val io = new ioArbiter(n)(data)
val last_grant = Reg(resetVal = Bits(0, log2up(n)))
val g = ArbiterCtrl((0 until n).map(i => io.in(i).valid && UFix(i) > last_grant) ++ io.in.map(_.valid))
val grant = (0 until n).map(i => g(i) && UFix(i) > last_grant || g(i+n))
(0 until n).map(i => io.in(i).ready := grant(i) && io.out.ready)
var choose = Bits(n-1)
for (i <- n-2 to 0 by -1)
choose = Mux(io.in(i).valid, Bits(i), choose)
for (i <- n-1 to 1 by -1)
choose = Mux(io.in(i).valid && UFix(i) > last_grant, Bits(i), choose)
when (io.out.valid && io.out.ready) {
last_grant := choose
}
val dvec = Vec(n) { data }
(0 until n).map(i => dvec(i) := io.in(i).bits )
io.out.valid := foldR(io.in.map(_.valid))(_||_)
io.out.bits := dvec(choose)
io.chosen := choose
}
class ioLockingArbiter[T <: Data](n: Int)(data: => T) extends Bundle { class ioLockingArbiter[T <: Data](n: Int)(data: => T) extends Bundle {
val in = Vec(n) { (new ioDecoupled()) { data } }.flip val in = Vec(n) { (new ioDecoupled()) { data } }.flip
val lock = Vec(n) { Bool() }.asInput val lock = Vec(n) { Bool() }.asInput