diff options
Diffstat (limited to 'qemu/tests/tcg/mips/mips64-dsp/printf.c')
| -rw-r--r-- | qemu/tests/tcg/mips/mips64-dsp/printf.c | 266 |
1 files changed, 266 insertions, 0 deletions
diff --git a/qemu/tests/tcg/mips/mips64-dsp/printf.c b/qemu/tests/tcg/mips/mips64-dsp/printf.c new file mode 100644 index 000000000..cf8676d39 --- /dev/null +++ b/qemu/tests/tcg/mips/mips64-dsp/printf.c @@ -0,0 +1,266 @@ + +typedef unsigned long va_list; + +#define ACC 4 +#define __read(source) \ +({ va_list __res; \ + __asm__ __volatile__( \ + "move\t%0, " #source "\n\t" \ + : "=r" (__res)); \ + __res; \ +}) + +enum format_type { + FORMAT_TYPE_NONE, + FORMAT_TYPE_HEX, + FORMAT_TYPE_ULONG, + FORMAT_TYPE_FLOAT +}; + +struct printf_spec { + char type; +}; + +static int format_decode(char *fmt, struct printf_spec *spec) +{ + char *start = fmt; + + for (; *fmt ; ++fmt) { + if (*fmt == '%') { + break; + } + } + + switch (*++fmt) { + case 'x': + spec->type = FORMAT_TYPE_HEX; + break; + + case 'd': + spec->type = FORMAT_TYPE_ULONG; + break; + + case 'f': + spec->type = FORMAT_TYPE_FLOAT; + break; + + default: + spec->type = FORMAT_TYPE_NONE; + } + + return ++fmt - start; +} + +void *memcpy(void *dest, void *src, int n) +{ + int i; + char *s = src; + char *d = dest; + + for (i = 0; i < n; i++) { + d[i] = s[i]; + } + return dest; +} + +char *number(char *buf, va_list num) +{ + int i; + char *str = buf; + static char digits[16] = "0123456789abcdef"; + str = str + sizeof(num) * 2; + + for (i = 0; i < sizeof(num) * 2; i++) { + *--str = digits[num & 15]; + num >>= 4; + } + + return buf + sizeof(num) * 2; +} + +char *__number(char *buf, va_list num) +{ + int i; + va_list mm = num; + char *str = buf; + + if (!num) { + *str++ = '0'; + return str; + } + + for (i = 0; mm; mm = mm/10, i++) { + /* Do nothing. */ + } + + str = str + i; + + while (num) { + *--str = num % 10 + 48; + num = num / 10; + } + + return str + i; +} + +va_list modf(va_list args, va_list *integer, va_list *num) +{ + int i; + double dot_v = 0; + va_list E, DOT, DOT_V; + + if (!args) { + return 0; + } + + for (i = 0, args = args << 1 >> 1; i < 52; i++) { + if ((args >> i) & 0x1) { + break; + } + } + + *integer = 0; + + if ((args >> 56 != 0x3f) || (args >> 52 == 0x3ff)) { + E = (args >> 52) - 1023; + DOT = 52 - E - i; + DOT_V = args << (12 + E) >> (12 + E) >> i; + *integer = ((args << 12 >> 12) >> (i + DOT)) | (1 << E); + } else { + E = ~((args >> 52) - 1023) + 1; + DOT_V = args << 12 >> 12; + + dot_v += 1.0 / (1 << E); + + for (i = 1; i <= 16; i++) { + if ((DOT_V >> (52 - i)) & 0x1) { + dot_v += 1.0 / (1 << E + i); + } + } + + for (i = 1, E = 0; i <= ACC; i++) { + dot_v *= 10; + if (!(va_list)dot_v) { + E++; + } + } + + *num = E; + + return dot_v; + } + + if (args & 0xf) { + for (i = 1; i <= 16; i++) { + if ((DOT_V >> (DOT - i)) & 0x1) { + dot_v += 1.0 / (1 << i); + } + } + + for (i = 1, E = 0; i <= ACC; i++) { + dot_v *= 10; + if (!(va_list)dot_v) { + E++; + } + } + + *num = E; + + return dot_v; + } else if (DOT) { + for (i = 1; i <= DOT; i++) { + if ((DOT_V >> (DOT - i)) & 0x1) { + dot_v += 1.0 / (1 << i); + } + } + + for (i = 1; i <= ACC; i++) { + dot_v = dot_v * 10; + } + + return dot_v; + } + + return 0; +} + +int vsnprintf(char *buf, int size, char *fmt, va_list args) +{ + char *str, *mm; + struct printf_spec spec = {0}; + + str = mm = buf; + + while (*fmt) { + char *old_fmt = fmt; + int read = format_decode(fmt, &spec); + + fmt += read; + + switch (spec.type) { + case FORMAT_TYPE_NONE: { + memcpy(str, old_fmt, read); + str += read; + break; + } + case FORMAT_TYPE_HEX: { + memcpy(str, old_fmt, read); + str = number(str + read, args); + for (; *mm ; ++mm) { + if (*mm == '%') { + *mm = '0'; + break; + } + } + break; + } + case FORMAT_TYPE_ULONG: { + memcpy(str, old_fmt, read - 2); + str = __number(str + read - 2, args); + break; + } + case FORMAT_TYPE_FLOAT: { + va_list integer, dot_v, num; + dot_v = modf(args, &integer, &num); + memcpy(str, old_fmt, read - 2); + str += read - 2; + if ((args >> 63 & 0x1)) { + *str++ = '-'; + } + str = __number(str, integer); + if (dot_v) { + *str++ = '.'; + while (num--) { + *str++ = '0'; + } + str = __number(str, dot_v); + } + break; + } + } + } + *str = '\0'; + + return str - buf; +} + +static void serial_out(char *str) +{ + while (*str) { + *(char *)0xffffffffb80003f8 = *str++; + } +} + +int vprintf(char *fmt, va_list args) +{ + int printed_len = 0; + static char printf_buf[512]; + printed_len = vsnprintf(printf_buf, sizeof(printf_buf), fmt, args); + serial_out(printf_buf); + return printed_len; +} + +int printf(char *fmt, ...) +{ + return vprintf(fmt, __read($5)); +} |