150 lines
4.7 KiB
Scala
150 lines
4.7 KiB
Scala
package rocket
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import Chisel._
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import Node._
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import Constants._
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import Instructions._
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import hwacha.Constants._
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class ioDpathVecInterface extends Bundle
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{
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val vcmdq_bits = Bits(SZ_VCMD, OUTPUT)
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val vximm1q_bits = Bits(SZ_VIMM, OUTPUT)
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val vximm2q_bits = Bits(SZ_VSTRIDE, OUTPUT)
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val vcntq_bits = Bits(SZ_VLEN, OUTPUT)
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val backup = Bool(OUTPUT)
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val backup_addr = Bits(64, OUTPUT)
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val kill = Bool(OUTPUT)
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val hold = Bool(OUTPUT)
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}
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class ioDpathVec extends Bundle
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{
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val ctrl = new ioCtrlDpathVec().flip
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val iface = new ioDpathVecInterface()
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val valid = Bool(INPUT)
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val inst = Bits(32, INPUT)
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val waddr = UFix(5, INPUT)
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val raddr1 = UFix(5, INPUT)
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val vecbank = Bits(8, INPUT)
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val vecbankcnt = UFix(4, INPUT)
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val wdata = Bits(64, INPUT)
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val rs2 = Bits(64, INPUT)
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val vechold = Bool(INPUT)
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val pcrw = new ioWritePort()
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val wen = Bool(OUTPUT)
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val appvl = UFix(12, OUTPUT)
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}
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class rocketDpathVec extends Component
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{
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val io = new ioDpathVec()
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val nxregs = Cat(UFix(0,1),io.inst(15,10).toUFix) // FIXME: to make the nregs width 7 bits
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val nfregs = io.inst(21,16).toUFix
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val nregs = nxregs + nfregs
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val uts_per_bank = MuxLookup(
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nregs, UFix(4,9), Array(
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UFix(0,7) -> UFix(256,9),
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UFix(1,7) -> UFix(256,9),
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UFix(2,7) -> UFix(256,9),
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UFix(3,7) -> UFix(128,9),
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UFix(4,7) -> UFix(85,9),
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UFix(5,7) -> UFix(64,9),
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UFix(6,7) -> UFix(51,9),
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UFix(7,7) -> UFix(42,9),
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UFix(8,7) -> UFix(36,9),
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UFix(9,7) -> UFix(32,9),
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UFix(10,7) -> UFix(28,9),
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UFix(11,7) -> UFix(25,9),
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UFix(12,7) -> UFix(23,9),
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UFix(13,7) -> UFix(21,9),
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UFix(14,7) -> UFix(19,9),
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UFix(15,7) -> UFix(18,9),
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UFix(16,7) -> UFix(17,9),
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UFix(17,7) -> UFix(16,9),
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UFix(18,7) -> UFix(15,9),
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UFix(19,7) -> UFix(14,9),
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UFix(20,7) -> UFix(13,9),
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UFix(21,7) -> UFix(12,9),
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UFix(22,7) -> UFix(12,9),
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UFix(23,7) -> UFix(11,9),
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UFix(24,7) -> UFix(11,9),
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UFix(25,7) -> UFix(10,9),
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UFix(26,7) -> UFix(10,9),
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UFix(27,7) -> UFix(9,9),
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UFix(28,7) -> UFix(9,9),
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UFix(29,7) -> UFix(9,9),
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UFix(30,7) -> UFix(8,9),
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UFix(31,7) -> UFix(8,9),
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UFix(32,7) -> UFix(8,9),
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UFix(33,7) -> UFix(8,9),
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UFix(34,7) -> UFix(7,9),
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UFix(35,7) -> UFix(7,9),
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UFix(36,7) -> UFix(7,9),
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UFix(37,7) -> UFix(7,9),
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UFix(38,7) -> UFix(6,9),
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UFix(39,7) -> UFix(6,9),
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UFix(40,7) -> UFix(6,9),
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UFix(41,7) -> UFix(6,9),
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UFix(42,7) -> UFix(6,9),
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UFix(43,7) -> UFix(6,9),
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UFix(44,7) -> UFix(5,9),
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UFix(45,7) -> UFix(5,9),
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UFix(46,7) -> UFix(5,9),
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UFix(47,7) -> UFix(5,9),
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UFix(48,7) -> UFix(5,9),
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UFix(49,7) -> UFix(5,9),
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UFix(50,7) -> UFix(5,9),
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UFix(51,7) -> UFix(5,9),
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UFix(52,7) -> UFix(5,9)
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))
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val reg_hwvl = Reg(resetVal = UFix(32, 12))
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val reg_appvl0 = Reg(resetVal = Bool(true))
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val hwvl_vcfg = (uts_per_bank * io.vecbankcnt)(11,0)
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val hwvl = Mux(io.ctrl.fn === VEC_CFG, hwvl_vcfg, reg_hwvl)
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val appvl = Mux(io.wdata(11,0) < hwvl, io.wdata(11,0), hwvl).toUFix
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when (io.valid && io.ctrl.wen)
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{
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when (io.ctrl.fn === VEC_CFG) { reg_hwvl := hwvl_vcfg }
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reg_appvl0 := !(appvl.orR())
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}
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io.wen := io.valid && io.ctrl.wen
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io.appvl := appvl
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val vlenm1 = appvl - Bits(1,1)
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io.iface.vcmdq_bits :=
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Mux(io.ctrl.sel_vcmd === VCMD_I, Cat(Bits(0,2), Bits(0,4), io.inst(9,8), Bits(0,6), Bits(0,6)),
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Mux(io.ctrl.sel_vcmd === VCMD_F, Cat(Bits(0,2), Bits(1,3), io.inst(9,7), Bits(0,6), Bits(0,6)),
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Mux(io.ctrl.sel_vcmd === VCMD_TX, Cat(Bits(1,2), io.inst(13,8), Bits(0,1), io.waddr, Bits(0,1), io.raddr1),
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Mux(io.ctrl.sel_vcmd === VCMD_TF, Cat(Bits(1,2), io.inst(13,8), Bits(1,1), io.waddr, Bits(1,1), io.raddr1),
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Mux(io.ctrl.sel_vcmd === VCMD_MX, Cat(Bits(1,1), io.inst(13,12), io.inst(2), io.inst(10,7), Bits(0,1), io.waddr, Bits(0,1), io.waddr),
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Mux(io.ctrl.sel_vcmd === VCMD_MF, Cat(Bits(1,1), io.inst(13,12), io.inst(2), io.inst(10,7), Bits(1,1), io.waddr, Bits(1,1), io.waddr),
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Mux(io.ctrl.sel_vcmd === VCMD_A, io.wdata(SZ_VCMD-1, 0),
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Bits(0,20))))))))
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io.iface.vximm1q_bits :=
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Mux(io.ctrl.sel_vimm === VIMM_VLEN, Cat(Bits(0,29), io.vecbankcnt, io.vecbank, io.inst(21,10), vlenm1(10,0)),
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io.wdata) // VIMM_ALU
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io.iface.vximm2q_bits :=
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Mux(io.ctrl.sel_vimm2 === VIMM2_RS2, io.rs2,
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io.wdata) // VIMM2_ALU
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io.iface.vcntq_bits := io.wdata(SZ_VLEN-1, 0)
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io.iface.backup := io.pcrw.en && (io.pcrw.addr === PCR_VEC_BACKUP)
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io.iface.backup_addr := io.pcrw.data
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io.iface.kill := io.pcrw.en && (io.pcrw.addr === PCR_VEC_KILL)
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io.iface.hold := io.vechold
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io.ctrl.valid := io.valid
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io.ctrl.inst := io.inst
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io.ctrl.appvl0 := reg_appvl0
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io.ctrl.pfq := io.rs2(0)
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}
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