#include <stdint.h>
#include <inttypes.h>
#include <stdlib.h>
#include <string.h>
#include <stdio.h>
#include "opcodes.h"
#ifndef M3
#define M3 0
#endif
/* The abstracted result of an CU21 insn */
typedef struct {
uint64_t addr1; // target
uint64_t len1;
uint64_t addr2; // source
uint64_t len2;
uint32_t cc;
} cu21_t;
/* Define various input buffers. */
/* U+0000 to U+007f: Result is 1 byte for each uint16_t */
uint16_t pattern1[] = {
0x0000, 0x007f, /* corner cases */
0x0047, 0x0056, 0x0045, 0x0021, 0x007b, 0x003a /* misc */
};
/* U+0080 to U+07ff: Result is 2 bytes for each uint16_t */
uint16_t pattern2[] = {
0x0080, 0x07ff, /* corner cases */
0x07df, 0x008f, 0x0100, 0x017f, 0x052f, 0x0600, 0x06ff /* misc */
};
/* U+0800 to U+d7ff: Result is 3 bytes for each uint16_t
U+dc00 to U+ffff: Result is 3 bytes for each uint16_t */
uint16_t pattern3[] = {
0x0800, 0xd7ff, /* corner cases */
0xdc00, 0xffff, /* corner cases */
0x083f, 0x1a21, 0x1b10, 0x2200, 0x225e, 0x22c9, 0xe001 /* misc */
};
/* U+d800 to U+dbff: Result is 4 bytes for each uint16_t pair */
uint16_t pattern4[] = {
0xd800, 0xdc00, /* left corner case */
0xdbff, 0xdfff, /* right corner case */
0xdada, 0xdddd, 0xdeaf, 0xdcdc /* misc */
};
/* Invalid low surrogate */
uint16_t invalid[] = { 0xd801, 0x0098 };
/* Mixed bytes */
uint16_t mixed[] = {
0x0078 /* 1 byte */,
0x0200 /* 2 bytes */,
0xffff /* 3 bytes */,
0xd800, 0xdc01 /* 4 bytes */
};
/* This is the buffer for the converted bytes. */
uint8_t buff[1000]; /* Large so we con'don't have to worry about it */
void write_and_check(uint16_t *, unsigned, unsigned);
static cu21_t
do_cu21(uint8_t *dst, uint64_t dst_len, uint16_t *src, uint64_t src_len)
{
int cc = 42;
cu21_t regs;
/* build up the register pairs */
register uint16_t *source asm("4") = src;
register uint64_t source_len asm("5") = src_len;
register uint8_t *dest asm("2") = dst;
register uint64_t dest_len asm("3") = dst_len;
asm volatile(
CU21(M3,2,4)
"ipm %2\n\t"
"srl %2,28\n\t"
: "+d"(dest), "+d"(source), "=d"(cc),
"+d"(source_len), "+d"(dest_len)
:
: "memory", "cc");
/* Capture register contents at end of cu21 */
regs.addr1 = (uint64_t)dest;
regs.len1 = dest_len;
regs.addr2 = (uint64_t)source;
regs.len2 = source_len;
regs.cc = cc;
return regs;
}
void
run_test(uint8_t *dst, uint64_t dst_len, uint16_t *src, uint64_t src_len)
{
int i;
cu21_t result;
result = do_cu21(dst, dst_len, src, src_len);
// Write out the converted bytes, if any
printf("UTF8: ");
if (dst_len - result.len1 == 0)
printf(" <none>");
else
for (i = 0; i < dst_len - result.len1; i++) {
printf(" %02x", dst[i]);
}
printf("\n");
printf(" cc = %d\n", result.cc);
if (dst != NULL)
printf(" dst address difference: %"PRId64, result.addr1 - (uint64_t)dst);
printf(" dst len: %"PRId64"\n", result.len1);
if (src != NULL)
printf(" src address difference: %"PRId64, result.addr2 - (uint64_t)src);
printf(" src len: %"PRId64"\n", result.len2);
}
int main()
{
/* Length == 0, no memory should be read or written */
printf("\n------------- test1 ----------------\n");
run_test(NULL, 0, NULL, 0);
/* Test exhaustion of source length (source bytes are valid) */
printf("\n------------- test2.1 ----------------\n");
/* No character will be written to BUFF, i.e. loop in jitted code
is not iterated */
run_test(buff, sizeof buff, NULL, 1);
run_test(buff, sizeof buff, pattern1, 1);
run_test(buff, sizeof buff, pattern2, 1);
run_test(buff, sizeof buff, pattern3, 1);
run_test(buff, sizeof buff, pattern4, 1);
run_test(buff, sizeof buff, pattern4, 2);
run_test(buff, sizeof buff, pattern4, 3);
printf("\n------------- test2.2 ----------------\n");
/* At least one character will be written to BUFF, i.e. loop in jitted
code is iterated */
run_test(buff, sizeof buff, pattern1, 3);
run_test(buff, sizeof buff, pattern2, 5);
run_test(buff, sizeof buff, pattern3, 7);
run_test(buff, sizeof buff, pattern4, 9);
run_test(buff, sizeof buff, pattern4, 10);
run_test(buff, sizeof buff, pattern4, 11);
/* Test exhaustion of destination length (source bytes are valid) */
printf("\n------------- test3.1 ----------------\n");
/* No character will be written to BUFF, i.e. loop in jitted code
is not iterated */
/* Want to write a single byte */
run_test(NULL, 0, pattern1, sizeof pattern1);
/* Want to write two bytes */
run_test(NULL, 0, pattern2, sizeof pattern2);
run_test(NULL, 1, pattern2, sizeof pattern2);
/* Want to write three bytes */
run_test(NULL, 0, pattern3, sizeof pattern3);
run_test(NULL, 1, pattern3, sizeof pattern3);
run_test(NULL, 2, pattern3, sizeof pattern3);
/* Want to write four bytes */
run_test(NULL, 0, pattern4, sizeof pattern4);
run_test(NULL, 1, pattern4, sizeof pattern4);
run_test(NULL, 2, pattern4, sizeof pattern4);
run_test(NULL, 3, pattern4, sizeof pattern4);
printf("\n------------- test3.2 ----------------\n");
/* At least one character will be written to BUFF, i.e. loop in jitted
code is iterated */
run_test(buff, 3, pattern1, sizeof pattern1);
run_test(buff, 5, pattern2, sizeof pattern2);
run_test(buff, 7, pattern3, sizeof pattern3);
run_test(buff, 8, pattern3, sizeof pattern3);
run_test(buff, 9, pattern4, sizeof pattern4);
run_test(buff, 10, pattern4, sizeof pattern4);
run_test(buff, 11, pattern4, sizeof pattern4);
/* When both operands are exhausted, cc=0 takes precedence.
(test1 tests this for len == 0) */
printf("\n------------- test4 ----------------\n");
run_test(buff, 6, pattern1, 6);
/* Input has invalid low surrogate. */
printf("\n------------- test5 ----------------\n");
run_test(buff, sizeof buff, invalid, sizeof invalid);
run_test(buff, 0, invalid, sizeof invalid);
/* Convert all pattern buffers */
printf("\n------------- test6 ----------------\n");
run_test(buff, sizeof buff, pattern1, sizeof pattern1);
run_test(buff, sizeof buff, pattern2, sizeof pattern2);
run_test(buff, sizeof buff, pattern3, sizeof pattern3);
run_test(buff, sizeof buff, pattern4, sizeof pattern4);
run_test(buff, sizeof buff, mixed, sizeof mixed);
/* Make sure we only write the exact number of bytes (and not more) */
uint16_t pat[2];
/* Write 1 byte */
printf("\n------------- test7.1 ----------------\n");
pat[0] = 0x10;
write_and_check(pat, 2, 1);
/* Write 2 bytes */
printf("\n------------- test7.2 ----------------\n");
pat[0] = 0x8f;
write_and_check(pat, 2, 2);
/* Write 3 bytes */
printf("\n------------- test7.3 ----------------\n");
pat[0] = 0x842;
write_and_check(pat, 2, 3);
/* Write 4 bytes */
printf("\n------------- test7.4 ----------------\n");
pat[0] = 0xd842;
pat[1] = 0xdc42;
write_and_check(pat, 2, 4);
return 0;
}
void
write_and_check_aux(uint16_t *input, unsigned num_input_bytes,
unsigned num_expected_output_bytes,
unsigned fill_byte)
{
int num_errors, i;
/* Fill output buffer with FILL_BYTE */
memset(buff, fill_byte, sizeof buff);
/* Execute cu21 */
run_test(buff, sizeof buff, input, num_input_bytes);
/* Make sure the rest of the buffer is unmodified. */
num_errors = 0;
for (i = num_expected_output_bytes; i < sizeof buff; ++i)
if (buff[i] != fill_byte) ++num_errors;
if (num_errors)
fprintf(stderr, "*** wrote more than %u bytes\n",
num_expected_output_bytes);
}
void
write_and_check(uint16_t *input, unsigned num_input_bytes,
unsigned num_expected_output_bytes)
{
write_and_check_aux(input, num_input_bytes, num_expected_output_bytes, 0x0);
/* Run again with different fill pattern to make sure we did not write
an extra 0x0 byte */
write_and_check_aux(input, num_input_bytes, num_expected_output_bytes, 0xFF);
}