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mul16u_G8D.c
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106 lines (105 loc) · 4.62 KB
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/***
* This code is a part of EvoApproxLib library (ehw.fit.vutbr.cz/approxlib) distributed under The MIT License.
* When used, please cite the following article(s): PRABAKARAN B. S., MRAZEK V., VASICEK Z., SEKANINA L., SHAFIQUE M. ApproxFPGAs: Embracing ASIC-based Approximate Arithmetic Components for FPGA-Based Systems. DAC 2020.
***/
// MAE% = 0.88 %
// MAE = 37715968
// WCE% = 3.51 %
// WCE = 150863873
// WCRE% = 100.00 %
// EP% = 100.00 %
// MRE% = 11.81 %
// MSE = 17642.903e11
// FPGA_POWER = 0.56
// FPGA_DELAY = 10
// FPGA_LUT = 26
#include <stdint.h>
#include <stdlib.h>
uint32_t mul16u_G8D(uint16_t A, uint16_t B)
{
uint32_t P, P_;
uint16_t tmp, C_10_14,C_11_13,C_11_14,C_12_12,C_12_13,C_12_14,C_13_11,C_13_12,C_13_13,C_13_14,C_14_10,C_14_11,C_14_12,C_14_13,C_14_14,C_15_10,C_15_11,C_15_12,C_15_13,C_15_14,C_15_9,S_10_14,S_10_15,S_11_13,S_11_14,S_11_15,S_12_12,S_12_13,S_12_14,S_12_15,S_13_11,S_13_12,S_13_13,S_13_14,S_13_15,S_14_10,S_14_11,S_14_12,S_14_13,S_14_14,S_14_15,S_15_10,S_15_11,S_15_12,S_15_13,S_15_14,S_15_15,S_15_9,S_16_10,S_16_11,S_16_12,S_16_13,S_16_14,S_16_15,S_16_8,S_16_9,S_9_15;
S_9_15 = (((A>>9)&1) & ((B>>15)&1));
S_10_14 = S_9_15^(((A>>10)&1) & ((B>>14)&1));
C_10_14 = S_9_15&(((A>>10)&1) & ((B>>14)&1));
S_10_15 = (((A>>10)&1) & ((B>>15)&1));
S_11_13 = S_10_14^(((A>>11)&1) & ((B>>13)&1));
C_11_13 = S_10_14&(((A>>11)&1) & ((B>>13)&1));
tmp = S_10_15^C_10_14;
S_11_14 = tmp^(((A>>11)&1) & ((B>>14)&1));
C_11_14 = (tmp&(((A>>11)&1) & ((B>>14)&1)))|(S_10_15&C_10_14);
S_11_15 = (((A>>11)&1) & ((B>>15)&1));
S_12_12 = S_11_13^(((A>>12)&1) & ((B>>12)&1));
C_12_12 = S_11_13&(((A>>12)&1) & ((B>>12)&1));
tmp = S_11_14^C_11_13;
S_12_13 = tmp^(((A>>12)&1) & ((B>>13)&1));
C_12_13 = (tmp&(((A>>12)&1) & ((B>>13)&1)))|(S_11_14&C_11_13);
tmp = S_11_15^C_11_14;
S_12_14 = tmp^(((A>>12)&1) & ((B>>14)&1));
C_12_14 = (tmp&(((A>>12)&1) & ((B>>14)&1)))|(S_11_15&C_11_14);
S_12_15 = (((A>>12)&1) & ((B>>15)&1));
S_13_11 = S_12_12^(((A>>13)&1) & ((B>>11)&1));
C_13_11 = S_12_12&(((A>>13)&1) & ((B>>11)&1));
tmp = S_12_13^C_12_12;
S_13_12 = tmp^(((A>>13)&1) & ((B>>12)&1));
C_13_12 = (tmp&(((A>>13)&1) & ((B>>12)&1)))|(S_12_13&C_12_12);
tmp = S_12_14^C_12_13;
S_13_13 = tmp^(((A>>13)&1) & ((B>>13)&1));
C_13_13 = (tmp&(((A>>13)&1) & ((B>>13)&1)))|(S_12_14&C_12_13);
tmp = S_12_15^C_12_14;
S_13_14 = tmp^(((A>>13)&1) & ((B>>14)&1));
C_13_14 = (tmp&(((A>>13)&1) & ((B>>14)&1)))|(S_12_15&C_12_14);
S_13_15 = (((A>>13)&1) & ((B>>15)&1));
S_14_10 = S_13_11^(((A>>14)&1) & ((B>>10)&1));
C_14_10 = S_13_11&(((A>>14)&1) & ((B>>10)&1));
tmp = S_13_12^C_13_11;
S_14_11 = tmp^(((A>>14)&1) & ((B>>11)&1));
C_14_11 = (tmp&(((A>>14)&1) & ((B>>11)&1)))|(S_13_12&C_13_11);
tmp = S_13_13^C_13_12;
S_14_12 = tmp^(((A>>14)&1) & ((B>>12)&1));
C_14_12 = (tmp&(((A>>14)&1) & ((B>>12)&1)))|(S_13_13&C_13_12);
tmp = S_13_14^C_13_13;
S_14_13 = tmp^(((A>>14)&1) & ((B>>13)&1));
C_14_13 = (tmp&(((A>>14)&1) & ((B>>13)&1)))|(S_13_14&C_13_13);
tmp = S_13_15^C_13_14;
S_14_14 = tmp^(((A>>14)&1) & ((B>>14)&1));
C_14_14 = (tmp&(((A>>14)&1) & ((B>>14)&1)))|(S_13_15&C_13_14);
S_14_15 = (((A>>14)&1) & ((B>>15)&1));
S_15_9 = S_14_10^(((A>>15)&1) & ((B>>9)&1));
C_15_9 = S_14_10&(((A>>15)&1) & ((B>>9)&1));
tmp = S_14_11^C_14_10;
S_15_10 = tmp^(((A>>15)&1) & ((B>>10)&1));
C_15_10 = (tmp&(((A>>15)&1) & ((B>>10)&1)))|(S_14_11&C_14_10);
tmp = S_14_12^C_14_11;
S_15_11 = tmp^(((A>>15)&1) & ((B>>11)&1));
C_15_11 = (tmp&(((A>>15)&1) & ((B>>11)&1)))|(S_14_12&C_14_11);
tmp = S_14_13^C_14_12;
S_15_12 = tmp^(((A>>15)&1) & ((B>>12)&1));
C_15_12 = (tmp&(((A>>15)&1) & ((B>>12)&1)))|(S_14_13&C_14_12);
tmp = S_14_14^C_14_13;
S_15_13 = tmp^(((A>>15)&1) & ((B>>13)&1));
C_15_13 = (tmp&(((A>>15)&1) & ((B>>13)&1)))|(S_14_14&C_14_13);
tmp = S_14_15^C_14_14;
S_15_14 = tmp^(((A>>15)&1) & ((B>>14)&1));
C_15_14 = (tmp&(((A>>15)&1) & ((B>>14)&1)))|(S_14_15&C_14_14);
S_15_15 = (((A>>15)&1) & ((B>>15)&1));
P_ = (((C_15_9 & 1)<<1)|((C_15_10 & 1)<<2)|((C_15_11 & 1)<<3)|((C_15_12 & 1)<<4)|((C_15_13 & 1)<<5)|((C_15_14 & 1)<<6)) + (((S_15_9 & 1)<<0)|((S_15_10 & 1)<<1)|((S_15_11 & 1)<<2)|((S_15_12 & 1)<<3)|((S_15_13 & 1)<<4)|((S_15_14 & 1)<<5)|((S_15_15 & 1)<<6));
S_16_8 = (P_ >> 0) & 1;
S_16_9 = (P_ >> 1) & 1;
S_16_10 = (P_ >> 2) & 1;
S_16_11 = (P_ >> 3) & 1;
S_16_12 = (P_ >> 4) & 1;
S_16_13 = (P_ >> 5) & 1;
S_16_14 = (P_ >> 6) & 1;
S_16_15 = (P_ >> 7) & 1;
P = 0;
P |= (S_16_8 & 1) << 24;
P |= (S_16_9 & 1) << 25;
P |= (S_16_10 & 1) << 26;
P |= (S_16_11 & 1) << 27;
P |= (S_16_12 & 1) << 28;
P |= (S_16_13 & 1) << 29;
P |= (S_16_14 & 1) << 30;
P |= (S_16_15 & 1) << 31;
return P;
}