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[/] [amber/] [trunk/] [hw/] [tests/] [mla.S] - Rev 43
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/*****************************************************************// //// Amber 2 Core Instruction Test //// //// This file is part of the Amber project //// http://www.opencores.org/project,amber //// //// Description //// Tests the mla (multiply and accumulate) instruction. //// //// Uses a testset of 16 numbers and multiplies them //// with each other in every combination. //// Checks each result against an expected result //// //// Author(s): //// - Conor Santifort, csantifort.amber@gmail.com //// ////////////////////////////////////////////////////////////////////// //// Copyright (C) 2010 Authors and OPENCORES.ORG //// //// 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, download it //// from http://www.opencores.org/lgpl.shtml //// //*****************************************************************/#include "amber_registers.h".section .text.globl mainmain:@ -------------------------------@ Test mla@ -------------------------------mov r6, #0ldr r8, AdrTestsetloop: and r2, r6, #0xfldr r7, [r8, r2, lsl #2]and r4, r6, #0xf0ldr r5, [r8, r4, lsr #2]and r9, r6, #0xf00ldr r4, [r8, r9, lsr #6]mla r12, r7, r5, r4@ -------------------------------@ Check Result@ -------------------------------ldr r9, AdrAnswersldr r10, [r9, r6, lsl #2]cmp r12, r10bne testfailadd r6, r6, #1cmp r6, #512beq test2b looptest2:@-------------------------------@ Test Flags@ Ensure that C and V retain their@ old values@ -------------------------------@ clear flags firstmov r2, pcldr r7, PCMaskbic r2, r2, r7 @ clear pc bitsbic r2, r2, #0xf0000000 @ clear condition clagsorr r2, r2, #0x10000000 @ set C and V flagsteqp pc, r2mov r0, #0mov r1, #-1mov r3, #-27@ mla{<cond>}{S} <Rd>, <Rm>, <Rs>, <Rn>@ Rd = (Rm * Rs + Rn)[31:0]mlas r5, r0, r1, r3mov r4, pcldr r7, PCMaskbic r4, r4, r7 @ clear pc bitsand r4, r4, #0xf0000000 @ clear non-flag bitscmp r4, #0x90000000 @ negate flag ( bit [31] ) set by mlasmovne r10, #110bne testfail2cmp r5, #-27movne r10, #120bne testfail2test3:@-------------------------------@ Test complex sequence of instructions@ -------------------------------mov r0, #1mov r1, #2mov r2, #7mov r3, #3mov r4, #5mov r5, #6mov r6, #7cmp r0, #-1ldreq r1, Data1ldrne r2, Data2@ mla{<cond>}{S} <Rd>, <Rm>, <Rs>, <Rn>@ Rd = (Rm * Rs + Rn)[31:0]mlane r3, r1, r2, r4ldreq r5, Data3ldrne r6, Data3cmp r3, #19movne r10, #200bne testfail2cmp r5, #6movne r10, #210bne testfail2cmp r6, #0movne r10, #220bne testfail2@ ------------------------------------------@ ------------------------------------------b testpasstestfail:ldr r11, AdrTestStatusstr r10, [r11]b testfailtestfail2:ldr r11, AdrTestStatusstr r10, [r11]b testfail2testpass:ldr r11, AdrTestStatusmov r10, #17str r10, [r11]b testpass@ ------------------------------------------@ ------------------------------------------/* Write 17 to this address to generate a Test Passed message */AdrTestStatus: .word ADR_AMBER_TEST_STATUSAdrTestset: .word TestsetAdrAnswers: .word AnswersData1: .word 0x3Data2: .word 0x7Data3: .word 0PCMask: .word 0x03fffffcTestset:.word 0.word 1.word 2.word 3.word 27.word 0x0000ffff.word 0x40000000.word 0x7fffffff.word 0x7ffffffe.word 0xffffffff.word 0xfffffffe.word 0xfffffffd.word 0xffffffe5.word 0x8fff0000.word 0x80000000.word 0x80000001Answers:.word 0x00000000.word 0x00000000.word 0x00000000.word 0x00000000.word 0x00000000.word 0x00000000.word 0x00000000.word 0x00000000.word 0x00000000.word 0x00000000.word 0x00000000.word 0x00000000.word 0x00000000.word 0x00000000.word 0x00000000.word 0x00000000.word 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