| OCR Text |
Show print Testing MPY2 ... model switch loqfile mpy2.loq w b0e2 b0q2 2a12 V 2a11 00000000000000001111111111111111 V b0q1 00000000111111110000000011111111 v b0e1 00001111000011110000111100001111 v b1q 00110011001100110011001100110011 v b1e 01010101010101010101010101010101 R d logfile exit 2A12=00010001000100010100010001000100 BOG2=00010000010000000001000001000000 BOE2=00000101000001010000010100000101 2A12=0 BOG2=0 BOE2=1 time= 3200.0ns Figure 18: RSIM Command and Log Files for the MPY2 Tile 55 Assembling hiertiles implementing these digit-set operators to build an arithmetic circuit is orders of magnitude more easy than building the circuit from "flat" tiles. Figure 20 shows the Elementary Multiplier/Multiplier Level, which is the largest module of the Radix-16 Digit Slice. Designed using the NMOS40 tileset, (which uses a 4-micron, singlelayer metal NMOS process,) it consists of 773 transistors, 1026 blank tiles and 44 non-blank tiles. The total number of tiles in this hierarchical circuit is 1070. Flattened, the total is 1736, a 70% increase. Figure 20 also exemplifies the "cleanliness" of a hierar-chical, bit-mapped, and labeled circuit. MOSSIM-11 [3] is another available switch-level simulator; having, among other conveniences missing in RSIM, the ability to read input bit vectors in parallel. The use of MOSSIM-11 is enabled by another region operation, which is just a variant of the method to write a net file. The :WRITE-NTK-FILE message writes a file in the "NTK" network format that MOSSIM-11 can read. Figure 21 contains an abbreviated NTK file for the Elementary Multiplier I Multiplier Level, which is annotated to point out a few NTK idiosyncrasies (see [3] for details.) Part of the log file is shown in Figure 22. This file records both the commands and the output generated thereby, where the output lines are those not preceded by a greater-than sign. To verify by hand that the output is correct would have been much too tedious, so Lisp functions were written to compute what it should have been for comparison with what MOSSIM-11 said it was. |
