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[/] [openmsp430/] [trunk/] [core/] [sim/] [rtl_sim/] [src/] [two-op_sub.v] - Rev 110
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/*===========================================================================*/ /* Copyright (C) 2001 Authors */ /* */ /* This source file may be used and distributed without restriction provided */ /* that this copyright statement is not removed from the file and that any */ /* derivative work contains the original copyright notice and the associated */ /* disclaimer. */ /* */ /* This source file is free software; you can redistribute it and/or modify */ /* it under the terms of the GNU Lesser General Public License as published */ /* by the Free Software Foundation; either version 2.1 of the License, or */ /* (at your option) any later version. */ /* */ /* This source is distributed in the hope that it will be useful, but WITHOUT*/ /* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or */ /* FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public */ /* License for more details. */ /* */ /* You should have received a copy of the GNU Lesser General Public License */ /* along with this source; if not, write to the Free Software Foundation, */ /* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */ /* */ /*===========================================================================*/ /* TWO-OPERAND ARITHMETIC: SUB[.B] INSTRUCTION */ /*---------------------------------------------------------------------------*/ /* Test the SUB[.B] instruction. */ /* */ /* Author(s): */ /* - Olivier Girard, olgirard@gmail.com */ /* */ /*---------------------------------------------------------------------------*/ /* $Rev: 19 $ */ /* $LastChangedBy: olivier.girard $ */ /* $LastChangedDate: 2009-08-04 23:47:15 +0200 (Tue, 04 Aug 2009) $ */ /*===========================================================================*/ initial begin $display(" ==============================================="); $display("| START SIMULATION |"); $display(" ==============================================="); repeat(5) @(posedge mclk); stimulus_done = 0; // SUB (WORD MODE) //-------------------------------------------------------- @(r15==16'h1000); if (r5 !==16'h5555) tb_error("====== SUB without Carry ====="); if (r6 !==16'h4444) tb_error("====== SUB with Carry ====="); // SUB.B (BYTE MODE) //-------------------------------------------------------- @(r15==16'h2000); if (r5 !==16'h0055) tb_error("====== SUB.B without Carry ====="); if (r6 !==16'h0044) tb_error("====== SUB.B with Carry ====="); // SUB (WORD MODE): Check Flags //-------------------------------------------------------- @(r15==16'h3000); if (r2 !==16'h0004) tb_error("====== SUB FLAG: Flag check error: V=0, N=1, Z=0, C=0 ====="); if (r5 !==16'hfbbc) tb_error("====== SUB FLAG: Result check error: V=0, N=1, Z=0, C=0 ====="); @(r15==16'h3001); if (r2 !==16'h0001) tb_error("====== SUB FLAG: Flag check error: V=0, N=0, Z=0, C=1 ====="); if (r5 !==16'h0111) tb_error("====== SUB FLAG: Result check error: V=0, N=0, Z=0, C=1 ====="); @(r15==16'h3002); if (r2 !==16'h0003) tb_error("====== SUB FLAG: Flag check error: V=0, N=0, Z=1, C=1 ====="); if (r5 !==16'h0000) tb_error("====== SUB FLAG: Result check error: V=0, N=0, Z=1, C=1 ====="); @(r15==16'h3003); if (r2 !==16'h0104) tb_error("====== SUB FLAG: Flag check error: V=1, N=1, Z=0, C=0 ====="); if (r5 !==16'hfef1) tb_error("====== SUB FLAG: Result check error: V=1, N=1, Z=0, C=0 ====="); @(r15==16'h3004); if (r2 !==16'h0101) tb_error("====== SUB FLAG: Flag check error: V=1, N=0, Z=0, C=1 ====="); if (r5 !==16'h0100) tb_error("====== SUB FLAG: Result check error: V=1, N=0, Z=0, C=1 ====="); // SUB.B (BYTE MODE): Check Flags //-------------------------------------------------------- @(r15==16'h4000); if (r2 !==16'h0004) tb_error("====== SUB.B FLAG: Flag check error: V=0, N=1, Z=0, C=0 ====="); if (r5 !==16'h00fc) tb_error("====== SUB.B FLAG: Result check error: V=0, N=1, Z=0, C=0 ====="); @(r15==16'h4001); if (r2 !==16'h0001) tb_error("====== SUB.B FLAG: Flag check error: V=0, N=0, Z=0, C=1 ====="); if (r5 !==16'h0001) tb_error("====== SUB.B FLAG: Result check error: V=0, N=0, Z=0, C=1 ====="); @(r15==16'h4002); if (r2 !==16'h0003) tb_error("====== SUB.B FLAG: Flag check error: V=0, N=0, Z=1, C=1 ====="); if (r5 !==16'h0000) tb_error("====== SUB.B FLAG: Result check error: V=0, N=0, Z=1, C=1 ====="); @(r15==16'h4003); if (r2 !==16'h0104) tb_error("====== SUB.B FLAG: Flag check error: V=1, N=1, Z=0, C=0 ====="); if (r5 !==16'h00f8) tb_error("====== SUB.B FLAG: Result check error: V=1, N=1, Z=0, C=0 ====="); @(r15==16'h4004); if (r2 !==16'h0101) tb_error("====== SUB.B FLAG: Flag check error: V=1, N=0, Z=0, C=1 ====="); if (r5 !==16'h000b) tb_error("====== SUB.B FLAG: Result check error: V=1, N=0, Z=0, C=1 ====="); stimulus_done = 1; end
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