128 lines
4.3 KiB
C
Executable File
128 lines
4.3 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 8
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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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"testb0", "testb1", "testb2", "testb3", "testbn0", "testbn1", "testbn2", "testbn3",
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"setnib0", "setnib1", "setnib2", "setnib3", "setnib4", "setnib5", "setnib6", "setnib7",
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"getnib0", "getnib1", "getnib2", "getnib3", "getnib4", "getnib5", "getnib6", "getnib7",
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"rolnib0", "rolnib1", "rolnib2", "rolnib3", "rolnib4", "rolnib5", "rolnib6", "rolnib7",
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"setbyte0", "setbyte1", "setbyte2", "setbyte3", "getbyte0", "getbyte1", "getbyte2", "getbyte3",
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"rolbyte0", "rolbyte1", "rolbyte2", "rolbyte3", "setword0", "setword1", "getword0", "getword1",
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"rolword0", "rolword1", "setr", "setd", "sets", "decod", "bmask", "zerox",
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"signx", "muxnits", "muxnibs", "movbyts", "mul", "muls", "addpix", "mulpix"};
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int instruct[] = {
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0x04100000, 0x04500000, 0x04900000, 0x04d00000, 0x04300000, 0x04700000, 0x04b00000, 0x04f00000,
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0x08000000, 0x08080000, 0x08100000, 0x08180000, 0x08200000, 0x08280000, 0x08300000, 0x08380000,
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0x08400000, 0x08480000, 0x08500000, 0x08580000, 0x08600000, 0x08680000, 0x08700000, 0x08780000,
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0x08800000, 0x08880000, 0x08900000, 0x08980000, 0x08a00000, 0x08a80000, 0x08b00000, 0x08b80000,
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0x08c00000, 0x08c80000, 0x08d00000, 0x08d80000, 0x08e00000, 0x08e80000, 0x08f00000, 0x08f80000,
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0x09000000, 0x09080000, 0x09100000, 0x09180000, 0x09200000, 0x09280000, 0x09300000, 0x09380000,
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0x09400000, 0x09480000, 0x09a80000, 0x09b00000, 0x09b80000, 0x09c00000, 0x09c80000, 0x09d00000,
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0x09d80000, 0x09e00000, 0x09e80000, 0x09f80000, 0x0a080000, 0x0a180000, 0x0a400000, 0x0a480000};
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int test_values[] = { 0, 1, 2, 0x7fffffff, 0x80000000, 0x80000001, 0xfffffffe, 0xffffffff };
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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] | 0xf000120a;
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for (s1 = 0; s1 < NUM_VALUES; 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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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 < 64; 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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