125 lines
3.5 KiB
C
Executable File
125 lines
3.5 KiB
C
Executable File
/*
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* Testbench for the alu
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* (c) Pacito.Sys
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*/
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#include <stdio.h>
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#include <string.h>
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#define PRINT_INPUT_VALUES
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#define NUM_VALUES 38
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#define MAX_POS 0x7fffffff
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#define MAX_NEG 0x80000000
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#define MAX_NEG1 0x80000001
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#define WZ_BIT 0x00080000
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#define WC_BIT 0x00100000
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void testit(int *);
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char *opcodeName[] = {
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"splitb", "mergeb", "splitw", "mergew", "seussf", "seussr", "rgbsqz", "rgbexp",
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"rev", "rczr", "rczl", "wrc", "wrnc", "wrz", "wrnz", "modcz"};
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int instruct[] = {
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0x0d600060, 0x0d600061, 0x0d600062, 0x0d600063, 0x0d600064, 0x0d600065, 0x0d600066, 0x0d600067,
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0x0d600069, 0x0d78006a, 0x0d78006b, 0x0d60006c, 0x0d60006d, 0x0d60006e, 0x0d60006f, 0x0d7c006f};
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int test_values[38] = { 0, 1, 2, 0x7fffffff, 0x80000000, 0x80000001, 0xfffffffe, 0xffffffff,
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4, 8, 0x10, 0x20, 0x40, 0x80, 0x100, 0x200, 0x400, 0x800, 0x1000, 0x2000, 0x4000, 0x8000,
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0x10000, 0x20000, 0x40000, 0x80000, 0x100000, 0x200000, 0x400000, 0x800000, 0x1000000,
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0x2000000, 0x4000000, 0x8000000, 0x10000000, 0x20000000, 0x40000000, 0x80000000};
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int mailbox[4];
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void alu(int opcode, int S, int D, int C, int Z, int *alu_q, int *alu_c, int *alu_z)
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{
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mailbox[0] = opcode;
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mailbox[1] = D;
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mailbox[2] = S;
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mailbox[3] = (Z << 1) | C;
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testit(mailbox);
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*alu_q = mailbox[1];
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*alu_c = mailbox[3] & 1;
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*alu_z = (mailbox[3] >> 1) & 1;
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}
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void writeTest(int index)
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{
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int instr;
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int testnum = 0;
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int s1, d1, S, D, C, Z;
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int alu_q, alu_c, alu_z;
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char name[20];
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strcpy(name, " ");
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memcpy(name, opcodeName[index], strlen(opcodeName[index]));
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printf("%s", name);
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#ifdef PRINT_INPUT_VALUES
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printf(" ---D---- ---S---- CZ = ");
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#endif
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printf("---Q---- CZ\n");
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instr = instruct[index] | 0xf0001200;
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for (s1 = 0; s1 < 1; s1++)
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{
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S = test_values[s1];
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for (d1 = 0; d1 < NUM_VALUES; d1++)
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{
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if (index == 15)
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{
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D = d1;
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instr = (instr & ~0x3fe00) | ((D & 255) << 9);
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}
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else
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D = test_values[d1];
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for (C = 0; C <= 1; C++)
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{
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for (Z = 0; Z <= 1; Z++)
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{
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alu(instr, S, D, C, Z, &alu_q, &alu_c, &alu_z);
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printf("%02x %03x", index, testnum++);
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#ifdef PRINT_INPUT_VALUES
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printf(" %08x %08x %1x%1x =", D, S, C, Z);
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#endif
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printf(" %08x %x%x\n", alu_q, alu_c, alu_z);
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}
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}
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}
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}
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}
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int main(void)
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{
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int j;
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sleep(1);
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for (j = 0; j < 16; j++)
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{
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writeTest(j);
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}
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return 0;
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}
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void testit(int *list)
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{
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__asm__(" rdlong r1, r0");
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__asm__(" wrlong r1, ##instruct");
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__asm__(" add r0, #4");
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__asm__(" rdlong r2, r0");
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__asm__(" add r0, #4");
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__asm__(" rdlong r3, r0");
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__asm__(" add r0, #4");
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__asm__(" rdlong r1, r0");
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__asm__(" shr r1, #1 wc");
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__asm__(" and r1, #1");
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__asm__(" xor r1, #1 wz");
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__asm__(" jmp #instruct");
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__asm__("instruct mov r2, r3 wcz");
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__asm__(" if_nz_and_nc mov r1, #0");
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__asm__(" if_nz_and_c mov r1, #1");
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__asm__(" if_z_and_nc mov r1, #2");
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__asm__(" if_z_and_c mov r1, #3");
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__asm__(" wrlong r1, r0");
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__asm__(" sub r0, #8");
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__asm__(" wrlong r2, r0");
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}
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