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[/] [eco32/] [trunk/] [hwtests/] [remtest/] [mkremtest.c] - Rev 129
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/* * mkremtest.c -- generate remainder test program */ #include <stdio.h> #include <stdlib.h> #include <string.h> unsigned myrem(unsigned x, unsigned y) { return (unsigned) ((signed) x % (signed) y); } unsigned myremu(unsigned x, unsigned y) { return x % y; } unsigned nums[] = { 0x00000000, 0x00000001, 0x00000002, 0x00000003, 0x0000FFFC, 0x0000FFFD, 0x0000FFFE, 0x0000FFFF, 0x00010000, 0x00010001, 0x00010002, 0x00010003, 0x7FFFFFFC, 0x7FFFFFFD, 0x7FFFFFFE, 0x7FFFFFFF, 0x80000000, 0x80000001, 0x80000002, 0x80000003, 0x8000FFFC, 0x8000FFFD, 0x8000FFFE, 0x8000FFFF, 0x80010000, 0x80010001, 0x80010002, 0x80010003, 0xFFFFFFFC, 0xFFFFFFFD, 0xFFFFFFFE, 0xFFFFFFFF, }; int snums = sizeof(nums) / sizeof(nums[0]); struct { char *name; unsigned (*func)(unsigned x, unsigned y); } ops[] = { { "rem", myrem }, { "remu", myremu }, }; int sops = sizeof(ops) / sizeof(ops[0]); int chooseReg(void) { int r; r = (rand() >> 8) % 16; return r + 8; } void chooseRegs(int *r1, int *r2, int *r3, int *r4) { *r1 = chooseReg(); do { *r2 = chooseReg(); } while (*r2 == *r1); do { *r3 = chooseReg(); } while (*r3 == *r2 || *r3 == *r1); do { *r4 = chooseReg(); } while (*r4 == *r3 || *r4 == *r2 || *r4 == *r1); } int newLabel(void) { static int lbl = 1000; return lbl++; } int main(void) { int i, j, k; unsigned res; int r1, r2, r3, r4; int lbl; printf("\tadd\t$7,$0,'.'\n"); for (i = 0; i < snums; i++) { for (j = 0; j < snums; j++) { if (nums[j] == 0) { continue; } for (k = 0; k < sops; k++) { if (nums[i] == 0x80000000 && nums[j] == 0xFFFFFFFF && k == 0) { continue; } res = ops[k].func(nums[i], nums[j]); chooseRegs(&r1, &r2, &r3, &r4); lbl = newLabel(); printf("\tadd\t$%d,$0,0x%08X\n", r1, nums[i]); printf("\tadd\t$%d,$0,0x%08X\n", r2, nums[j]); printf("\t%s\t$%d,$%d,$%d\n", ops[k].name, r3, r1, r2); printf("\tadd\t$%d,$0,0x%08X\n", r4, res); printf("\tbeq\t$%d,$%d,L%d\n", r3, r4, lbl); printf("\tadd\t$7,$0,'?'\n"); printf("L%d:\n", lbl); } } } printf("out:\n"); printf("\tadd\t$6,$0,0xF0300000\n"); printf("out1:\n"); printf("\tldw\t$5,$6,8\n"); printf("\tand\t$5,$5,1\n"); printf("\tbeq\t$5,$0,out1\n"); printf("\tstw\t$7,$6,12\n"); printf("halt:\n"); printf("\tj\thalt\n"); return 0; }
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