/****************************************************************************
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/****************************************************************************
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sbd_sqrt_fp_calc_mant
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sbd_sqrt_fp_calc_mant
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- mantissa calculation for sbd_sqrt_fp
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- mantissa calculation for sbd_sqrt_fp
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Copyright (C) 2005 Samuel Brown
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Copyright (C) 2005 Samuel Brown
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sam.brown@sbdesign.org
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sam.brown@sbdesign.org
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This library is free software; you can redistribute it and/or
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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version 2.1 of the License, or (at your option) any later version.
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This library is distributed in the hope that it will be useful,
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This library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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You should have received a copy of the GNU Lesser General Public
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License along with this library; if not, write to the Free Software
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License along with this library; if not, write to the Free Software
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Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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****************************************************************************/
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****************************************************************************/
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module sbd_sqrt_fp_calc_mant (MANT_IN,CLK,VAL_IN,MANT_OUT,VAL_OUT);
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module sbd_sqrt_fp_calc_mant (MANT_IN,CLK,VAL_IN,MANT_OUT,VAL_OUT);
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parameter mantlength = 24;
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parameter mantlength = 24;
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input [mantlength-1:0] MANT_IN;
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input [mantlength-1:0] MANT_IN;
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input CLK;
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input CLK;
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input VAL_IN;
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input VAL_IN;
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output wire [mantlength-1:0] MANT_OUT;
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output wire [mantlength-1:0] MANT_OUT;
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output VAL_OUT;
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output VAL_OUT;
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wire init, lsr, enr, enl, en_d, dleft;
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wire init, lsr, enr, enl, en_d, dleft;
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wire [1:0] shiftLeft1SerialOut;
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wire [1:0] shiftLeft1SerialOut;
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wire [(2*mantlength)-1:0] biPOUT, adsuOutput, shiftLeft2ParallelOut;
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wire [(2*mantlength)-1:0] biPOUT, adsuOutput, shiftLeft2ParallelOut;
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sbd_shifter_left2 shiftLeft1 (
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sbd_shifter_left2 shiftLeft1 (
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.SIN(2'b00),
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.SIN(2'b00),
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.PIN(MANT_IN),
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.PIN(MANT_IN),
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.LOAD(init),
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.LOAD(init),
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.RST(1'b0),
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.RST(1'b0),
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.SHIFT(enl),
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.SHIFT(enl),
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.CLK(CLK),
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.CLK(CLK),
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.SOUT(shiftLeft1SerialOut));
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.SOUT(shiftLeft1SerialOut));
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defparam shiftLeft1.bitlength = mantlength;
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defparam shiftLeft1.bitlength = mantlength;
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sbd_adsu adsu_inst (
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sbd_adsu adsu_inst (
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.A(shiftLeft2ParallelOut),
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.A(shiftLeft2ParallelOut),
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.B(biPOUT),
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.B(biPOUT),
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.ADD(shiftLeft2ParallelOut[47]),
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.ADD(shiftLeft2ParallelOut[47]),
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.C_IN(~shiftLeft2ParallelOut[47]),
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.C_IN(~shiftLeft2ParallelOut[47]),
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.S(adsuOutput));
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.S(adsuOutput));
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defparam adsu_inst.bitlength = 2*mantlength;
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defparam adsu_inst.bitlength = 2*mantlength;
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sbd_shifter_left2 shiftLeft2 (
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sbd_shifter_left2 shiftLeft2 (
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.SIN(shiftLeft1SerialOut),
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.SIN(shiftLeft1SerialOut),
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.PIN(adsuOutput),
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.PIN(adsuOutput),
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.LOAD(lsr),
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.LOAD(lsr),
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.RST(init),
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.RST(init),
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.SHIFT(enr),
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.SHIFT(enr),
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.CLK(CLK),
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.CLK(CLK),
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.POUT(shiftLeft2ParallelOut));
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.POUT(shiftLeft2ParallelOut));
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defparam shiftLeft2.bitlength = 2*mantlength;
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defparam shiftLeft2.bitlength = 2*mantlength;
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sbd_shifter_left3_right2 shiftBI (
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sbd_shifter_left3_right2 shiftBI (
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.SINLSB({~shiftLeft2ParallelOut[(2*mantlength)-1],shiftLeft2ParallelOut[(2*mantlength)-1],1'b1}),
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.SINLSB({~shiftLeft2ParallelOut[(2*mantlength)-1],shiftLeft2ParallelOut[(2*mantlength)-1],1'b1}),
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.SINMSB(2'b00),
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.SINMSB(2'b00),
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.PIN({ {2*mantlength-1{1'b0}}, 1'b1 }),
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.PIN({ {2*mantlength-1{1'b0}}, 1'b1 }),
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.LOAD(init),
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.LOAD(init),
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.LR(~dleft),
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.LR(~dleft),
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.RST(1'b0),
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.RST(1'b0),
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.SHIFT(en_d),
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.SHIFT(en_d),
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.CLK(CLK),
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.CLK(CLK),
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.POUT(biPOUT));
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.POUT(biPOUT));
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defparam shiftBI.bitlength = 2*mantlength;
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defparam shiftBI.bitlength = 2*mantlength;
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assign MANT_OUT = biPOUT[mantlength-1:0];
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assign MANT_OUT = biPOUT[mantlength-1:0];
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sbd_sqrt_fp_state_mach state_mach (
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sbd_sqrt_fp_state_mach state_mach (
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.CLK(CLK),
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.CLK(CLK),
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.VAL_IN(VAL_IN),
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.VAL_IN(VAL_IN),
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.INIT(init),
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.INIT(init),
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.LSR(lsr),
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.LSR(lsr),
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.ENR(enr),
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.ENR(enr),
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.ENL(enl),
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.ENL(enl),
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.EN_D(en_d),
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.EN_D(en_d),
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.DLEFT(dleft),
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.DLEFT(dleft),
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.VAL_OUT(VAL_OUT));
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.VAL_OUT(VAL_OUT));
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defparam state_mach.termval = mantlength + 1;
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defparam state_mach.termval = mantlength + 1;
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endmodule
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endmodule
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