mirror of
https://github.com/CTCaer/RetroArch.git
synced 2024-12-22 18:58:21 +00:00
(Android) Cleanup cpufeatures.c
This commit is contained in:
parent
845e09b3cf
commit
1804217fd6
@ -69,10 +69,6 @@ static int g_cpuCount;
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# define DEFAULT_CPU_FAMILY ANDROID_CPU_FAMILY_UNKNOWN
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#endif
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#define D(...) \
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do { \
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} while (0)
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#ifdef __i386__
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static __inline__ void cpu_x86_cpuid(int func, int values[4])
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{
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@ -126,56 +122,53 @@ cpu_read_file(const char* pathname, char* buffer, size_t buffsize)
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static char*
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extract_cpuinfo_field(char* buffer, int buflen, const char* field)
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{
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int fieldlen = strlen(field);
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char* bufend = buffer + buflen;
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char* result = NULL;
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int len;
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const char *p, *q;
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int fieldlen = strlen(field);
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char* bufend = buffer + buflen;
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char* result = NULL;
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int len;
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const char *p, *q;
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/* Look for first field occurence, and ensures it starts the line.
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*/
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p = buffer;
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bufend = buffer + buflen;
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for (;;) {
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p = memmem(p, bufend-p, field, fieldlen);
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if (p == NULL)
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goto EXIT;
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/* Look for first field occurence, and ensures it starts the line.
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*/
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p = buffer;
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bufend = buffer + buflen;
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for (;;)
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{
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p = memmem(p, bufend-p, field, fieldlen);
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if (p == NULL)
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goto EXIT;
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if (p == buffer || p[-1] == '\n')
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break;
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if (p == buffer || p[-1] == '\n')
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break;
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p += fieldlen;
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}
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p += fieldlen;
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}
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/* Skip to the first column followed by a space */
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p += fieldlen;
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p = memchr(p, ':', bufend-p);
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if (p == NULL || p[1] != ' ')
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goto EXIT;
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/* Skip to the first column followed by a space */
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p += fieldlen;
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p = memchr(p, ':', bufend-p);
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if (p == NULL || p[1] != ' ')
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goto EXIT;
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/* Find the end of the line */
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p += 2;
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q = memchr(p, '\n', bufend-p);
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if (q == NULL)
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q = bufend;
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/* Find the end of the line */
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p += 2;
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q = memchr(p, '\n', bufend-p);
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if (q == NULL)
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q = bufend;
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/* Copy the line into a heap-allocated buffer */
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len = q-p;
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result = malloc(len+1);
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if (result == NULL)
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goto EXIT;
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/* Copy the line into a heap-allocated buffer */
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len = q-p;
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result = malloc(len+1);
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if (result == NULL)
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goto EXIT;
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memcpy(result, p, len);
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result[len] = '\0';
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memcpy(result, p, len);
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result[len] = '\0';
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EXIT:
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return result;
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return result;
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}
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/* Like strlen(), but for constant string literals */
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#define STRLEN_CONST(x) ((sizeof(x)-1)
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/* Checks that a space-separated list of items contains one given 'item'.
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* Returns 1 if found, 0 otherwise.
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*/
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@ -188,7 +181,8 @@ has_list_item(const char* list, const char* item)
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if (list == NULL)
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return 0;
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while (*p) {
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while (*p)
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{
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const char* q;
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/* skip spaces */
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@ -224,7 +218,8 @@ parse_decimal(const char* input, const char* limit, int* result)
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{
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const char* p = input;
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int val = 0;
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while (p < limit) {
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while (p < limit)
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{
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int d = (*p - '0');
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if ((unsigned)d >= 10U)
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break;
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@ -248,28 +243,6 @@ typedef struct {
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uint32_t mask;
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} CpuList;
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static __inline__ void
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cpulist_init(CpuList* list) {
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list->mask = 0;
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}
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static __inline__ void
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cpulist_and(CpuList* list1, CpuList* list2) {
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list1->mask &= list2->mask;
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}
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static __inline__ void
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cpulist_set(CpuList* list, int index) {
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if ((unsigned)index < 32) {
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list->mask |= (uint32_t)(1U << index);
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}
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}
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static __inline__ int
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cpulist_count(CpuList* list) {
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return __builtin_popcount(list->mask);
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}
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/* Parse a textual list of cpus and store the result inside a CpuList object.
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* Input format is the following:
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* - comma-separated list of items (no spaces)
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@ -280,73 +253,76 @@ cpulist_count(CpuList* list) {
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* 2,4-127,128-143
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* 0-1
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*/
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static void
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cpulist_parse(CpuList* list, const char* line, int line_len)
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static void cpulist_parse(CpuList* list, const char* line, int line_len)
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{
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const char* p = line;
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const char* end = p + line_len;
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const char* q;
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const char* p = line;
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const char* end = p + line_len;
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const char* q;
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/* NOTE: the input line coming from sysfs typically contains a
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* trailing newline, so take care of it in the code below
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*/
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while (p < end && *p != '\n')
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{
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int val, start_value, end_value;
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/* NOTE: the input line coming from sysfs typically contains a
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* trailing newline, so take care of it in the code below
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*/
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while (p < end && *p != '\n')
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{
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int val, start_value, end_value;
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/* Find the end of current item, and put it into 'q' */
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q = memchr(p, ',', end-p);
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if (q == NULL) {
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q = end;
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}
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/* Find the end of current item, and put it into 'q' */
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q = memchr(p, ',', end-p);
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if (q == NULL)
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q = end;
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/* Get first value */
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p = parse_decimal(p, q, &start_value);
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if (p == NULL)
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/* Get first value */
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p = parse_decimal(p, q, &start_value);
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if (p == NULL)
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goto BAD_FORMAT;
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end_value = start_value;
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/* If we're not at the end of the item, expect a dash and
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* and integer; extract end value.
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*/
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if (p < q && *p == '-')
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{
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p = parse_decimal(p+1, q, &end_value);
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if (p == NULL)
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goto BAD_FORMAT;
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}
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end_value = start_value;
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/* Set bits CPU list bits */
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for (val = start_value; val <= end_value; val++)
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{
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if ((unsigned)val < 32)
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list->mask |= (uint32_t)(1U << val);
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}
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/* If we're not at the end of the item, expect a dash and
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* and integer; extract end value.
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*/
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if (p < q && *p == '-') {
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p = parse_decimal(p+1, q, &end_value);
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if (p == NULL)
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goto BAD_FORMAT;
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}
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/* Set bits CPU list bits */
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for (val = start_value; val <= end_value; val++) {
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cpulist_set(list, val);
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}
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/* Jump to next item */
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p = q;
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if (p < end)
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p++;
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}
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/* Jump to next item */
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p = q;
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if (p < end)
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p++;
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}
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BAD_FORMAT:
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;
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;
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}
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/* Read a CPU list from one sysfs file */
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static void
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cpulist_read_from(CpuList* list, const char* filename)
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{
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char file[64];
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int filelen;
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char file[64];
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int filelen;
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cpulist_init(list);
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list->mask = 0;
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filelen = cpu_read_file(filename, file, sizeof file);
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if (filelen < 0) {
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D("Could not read %s: %s\n", filename, strerror(errno));
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return;
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}
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filelen = cpu_read_file(filename, file, sizeof file);
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cpulist_parse(list, file, filelen);
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if (filelen < 0)
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{
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RARCH_ERR("Could not read %s: %s\n", filename, strerror(errno));
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return;
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}
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cpulist_parse(list, file, filelen);
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}
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/* Return the number of cpus present on a given device.
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@ -355,192 +331,179 @@ cpulist_read_from(CpuList* list, const char* filename)
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* intersection of the 'present' and 'possible' CPU lists and count
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* the result.
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*/
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static int
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get_cpu_count(void)
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static int get_cpu_count(void)
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{
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CpuList cpus_present[1];
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CpuList cpus_possible[1];
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CpuList cpus_present[1];
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CpuList cpus_possible[1];
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cpulist_read_from(cpus_present, "/sys/devices/system/cpu/present");
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cpulist_read_from(cpus_possible, "/sys/devices/system/cpu/possible");
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cpulist_read_from(cpus_present, "/sys/devices/system/cpu/present");
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cpulist_read_from(cpus_possible, "/sys/devices/system/cpu/possible");
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/* Compute the intersection of both sets to get the actual number of
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* CPU cores that can be used on this device by the kernel.
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*/
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cpulist_and(cpus_present, cpus_possible);
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/* Compute the intersection of both sets to get the actual number of
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* CPU cores that can be used on this device by the kernel.
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*/
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cpus_present->mask &= cpus_possible->mask;
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return cpulist_count(cpus_present);
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return __builtin_popcount(cpus_present->mask);
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}
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static void
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android_cpuInit(void)
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static void android_cpuInit(void)
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{
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char cpuinfo[4096];
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int cpuinfo_len;
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char cpuinfo[4096];
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int cpuinfo_len;
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g_cpuFamily = DEFAULT_CPU_FAMILY;
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g_cpuFeatures = 0;
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g_cpuCount = 1;
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g_cpuFamily = DEFAULT_CPU_FAMILY;
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g_cpuFeatures = 0;
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g_cpuCount = 1;
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cpuinfo_len = cpu_read_file("/proc/cpuinfo", cpuinfo, sizeof cpuinfo);
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D("cpuinfo_len is (%d):\n%.*s\n", cpuinfo_len,
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cpuinfo_len >= 0 ? cpuinfo_len : 0, cpuinfo);
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cpuinfo_len = cpu_read_file("/proc/cpuinfo", cpuinfo, sizeof cpuinfo);
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RARCH_LOG("cpuinfo_len is (%d):\n%.*s\n", cpuinfo_len,
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cpuinfo_len >= 0 ? cpuinfo_len : 0, cpuinfo);
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if (cpuinfo_len < 0) /* should not happen */ {
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return;
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}
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if (cpuinfo_len < 0)
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return;
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/* Count the CPU cores, the value may be 0 for single-core CPUs */
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g_cpuCount = get_cpu_count();
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if (g_cpuCount == 0) {
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g_cpuCount = 1;
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}
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/* Count the CPU cores, the value may be 0 for single-core CPUs */
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g_cpuCount = get_cpu_count();
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if (g_cpuCount == 0)
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g_cpuCount = 1;
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D("found cpuCount = %d\n", g_cpuCount);
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RARCH_LOG("found cpuCount = %d\n", g_cpuCount);
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#ifdef __ARM_ARCH__
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{
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/* Extract architecture from the "CPU Architecture" field.
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* The list is well-known, unlike the the output of
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* the 'Processor' field which can vary greatly.
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*
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* See the definition of the 'proc_arch' array in
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* $KERNEL/arch/arm/kernel/setup.c and the 'c_show' function in
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* same file.
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*/
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char* cpuArch = extract_cpuinfo_field(cpuinfo, cpuinfo_len, "CPU architecture");
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/* Extract architecture from the "CPU Architecture" field.
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* The list is well-known, unlike the the output of
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* the 'Processor' field which can vary greatly.
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*
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* See the definition of the 'proc_arch' array in
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* $KERNEL/arch/arm/kernel/setup.c and the 'c_show' function in
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* same file.
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*/
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char* cpuArch = extract_cpuinfo_field(cpuinfo, cpuinfo_len, "CPU architecture");
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if (cpuArch != NULL) {
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char* end;
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long archNumber;
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int hasARMv7 = 0;
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if (cpuArch != NULL)
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{
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char* end;
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long archNumber;
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int hasARMv7 = 0;
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D("found cpuArch = '%s'\n", cpuArch);
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RARCH_LOG("found cpuArch = '%s'\n", cpuArch);
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/* read the initial decimal number, ignore the rest */
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archNumber = strtol(cpuArch, &end, 10);
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/* read the initial decimal number, ignore the rest */
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archNumber = strtol(cpuArch, &end, 10);
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/* Here we assume that ARMv8 will be upwards compatible with v7
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* in the future. Unfortunately, there is no 'Features' field to
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* indicate that Thumb-2 is supported.
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*/
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if (end > cpuArch && archNumber >= 7) {
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hasARMv7 = 1;
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/* Here we assume that ARMv8 will be upwards compatible with v7
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* in the future. Unfortunately, there is no 'Features' field to
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* indicate that Thumb-2 is supported.
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*/
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if (end > cpuArch && archNumber >= 7)
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hasARMv7 = 1;
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/* Unfortunately, it seems that certain ARMv6-based CPUs
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* report an incorrect architecture number of 7!
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*
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* See http://code.google.com/p/android/issues/detail?id=10812
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*
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* We try to correct this by looking at the 'elf_format'
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* field reported by the 'Processor' field, which is of the
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* form of "(v7l)" for an ARMv7-based CPU, and "(v6l)" for
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* an ARMv6-one.
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*/
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if (hasARMv7)
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{
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char* cpuProc = extract_cpuinfo_field(cpuinfo, cpuinfo_len,
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"Processor");
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if (cpuProc != NULL)
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{
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RARCH_LOG("found cpuProc = '%s'\n", cpuProc);
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if (has_list_item(cpuProc, "(v6l)"))
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{
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RARCH_ERR("CPU processor and architecture mismatch!!\n");
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hasARMv7 = 0;
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}
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free(cpuProc);
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}
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}
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/* Unfortunately, it seems that certain ARMv6-based CPUs
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* report an incorrect architecture number of 7!
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*
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* See http://code.google.com/p/android/issues/detail?id=10812
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*
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* We try to correct this by looking at the 'elf_format'
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* field reported by the 'Processor' field, which is of the
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* form of "(v7l)" for an ARMv7-based CPU, and "(v6l)" for
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* an ARMv6-one.
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*/
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if (hasARMv7) {
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char* cpuProc = extract_cpuinfo_field(cpuinfo, cpuinfo_len,
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"Processor");
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if (cpuProc != NULL) {
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D("found cpuProc = '%s'\n", cpuProc);
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if (has_list_item(cpuProc, "(v6l)")) {
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D("CPU processor and architecture mismatch!!\n");
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hasARMv7 = 0;
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}
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free(cpuProc);
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}
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}
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if (hasARMv7)
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g_cpuFeatures |= ANDROID_CPU_ARM_FEATURE_ARMv7;
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if (hasARMv7) {
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g_cpuFeatures |= ANDROID_CPU_ARM_FEATURE_ARMv7;
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}
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/* The LDREX / STREX instructions are available from ARMv6 */
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if (archNumber >= 6)
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g_cpuFeatures |= ANDROID_CPU_ARM_FEATURE_LDREX_STREX;
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/* The LDREX / STREX instructions are available from ARMv6 */
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if (archNumber >= 6) {
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g_cpuFeatures |= ANDROID_CPU_ARM_FEATURE_LDREX_STREX;
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}
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free(cpuArch);
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}
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free(cpuArch);
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}
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/* Extract the list of CPU features from 'Features' field */
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char* cpuFeatures = extract_cpuinfo_field(cpuinfo, cpuinfo_len, "Features");
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/* Extract the list of CPU features from 'Features' field */
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char* cpuFeatures = extract_cpuinfo_field(cpuinfo, cpuinfo_len, "Features");
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if (cpuFeatures != NULL)
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{
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RARCH_LOG("found cpuFeatures = '%s'\n", cpuFeatures);
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if (cpuFeatures != NULL) {
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if (has_list_item(cpuFeatures, "vfpv3"))
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g_cpuFeatures |= ANDROID_CPU_ARM_FEATURE_VFPv3;
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D("found cpuFeatures = '%s'\n", cpuFeatures);
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else if (has_list_item(cpuFeatures, "vfpv3d16"))
|
||||
g_cpuFeatures |= ANDROID_CPU_ARM_FEATURE_VFPv3;
|
||||
|
||||
if (has_list_item(cpuFeatures, "vfpv3"))
|
||||
g_cpuFeatures |= ANDROID_CPU_ARM_FEATURE_VFPv3;
|
||||
|
||||
else if (has_list_item(cpuFeatures, "vfpv3d16"))
|
||||
g_cpuFeatures |= ANDROID_CPU_ARM_FEATURE_VFPv3;
|
||||
|
||||
if (has_list_item(cpuFeatures, "neon")) {
|
||||
/* Note: Certain kernels only report neon but not vfpv3
|
||||
* in their features list. However, ARM mandates
|
||||
* that if Neon is implemented, so must be VFPv3
|
||||
* so always set the flag.
|
||||
*/
|
||||
g_cpuFeatures |= ANDROID_CPU_ARM_FEATURE_NEON |
|
||||
ANDROID_CPU_ARM_FEATURE_VFPv3;
|
||||
}
|
||||
free(cpuFeatures);
|
||||
}
|
||||
}
|
||||
if (has_list_item(cpuFeatures, "neon"))
|
||||
{
|
||||
/* Note: Certain kernels only report neon but not vfpv3
|
||||
* in their features list. However, ARM mandates
|
||||
* that if Neon is implemented, so must be VFPv3
|
||||
* so always set the flag.
|
||||
*/
|
||||
g_cpuFeatures |= ANDROID_CPU_ARM_FEATURE_NEON |
|
||||
ANDROID_CPU_ARM_FEATURE_VFPv3;
|
||||
}
|
||||
free(cpuFeatures);
|
||||
}
|
||||
#endif /* __ARM_ARCH__ */
|
||||
|
||||
#ifdef __i386__
|
||||
g_cpuFamily = ANDROID_CPU_FAMILY_X86;
|
||||
g_cpuFamily = ANDROID_CPU_FAMILY_X86;
|
||||
|
||||
int regs[4];
|
||||
int regs[4];
|
||||
|
||||
/* According to http://en.wikipedia.org/wiki/CPUID */
|
||||
/* According to http://en.wikipedia.org/wiki/CPUID */
|
||||
#define VENDOR_INTEL_b 0x756e6547
|
||||
#define VENDOR_INTEL_c 0x6c65746e
|
||||
#define VENDOR_INTEL_d 0x49656e69
|
||||
|
||||
cpu_x86_cpuid(0, regs);
|
||||
int vendorIsIntel = (regs[1] == VENDOR_INTEL_b &&
|
||||
regs[2] == VENDOR_INTEL_c &&
|
||||
regs[3] == VENDOR_INTEL_d);
|
||||
cpu_x86_cpuid(0, regs);
|
||||
int vendorIsIntel = (regs[1] == VENDOR_INTEL_b &&
|
||||
regs[2] == VENDOR_INTEL_c &&
|
||||
regs[3] == VENDOR_INTEL_d);
|
||||
|
||||
cpu_x86_cpuid(1, regs);
|
||||
if ((regs[2] & (1 << 9)) != 0) {
|
||||
g_cpuFeatures |= ANDROID_CPU_X86_FEATURE_SSSE3;
|
||||
}
|
||||
if ((regs[2] & (1 << 23)) != 0) {
|
||||
g_cpuFeatures |= ANDROID_CPU_X86_FEATURE_POPCNT;
|
||||
}
|
||||
if (vendorIsIntel && (regs[2] & (1 << 22)) != 0) {
|
||||
g_cpuFeatures |= ANDROID_CPU_X86_FEATURE_MOVBE;
|
||||
}
|
||||
cpu_x86_cpuid(1, regs);
|
||||
if ((regs[2] & (1 << 9)) != 0)
|
||||
g_cpuFeatures |= ANDROID_CPU_X86_FEATURE_SSSE3;
|
||||
if ((regs[2] & (1 << 23)) != 0)
|
||||
g_cpuFeatures |= ANDROID_CPU_X86_FEATURE_POPCNT;
|
||||
if (vendorIsIntel && (regs[2] & (1 << 22)) != 0)
|
||||
g_cpuFeatures |= ANDROID_CPU_X86_FEATURE_MOVBE;
|
||||
#endif
|
||||
|
||||
#ifdef _MIPS_ARCH
|
||||
g_cpuFamily = ANDROID_CPU_FAMILY_MIPS;
|
||||
g_cpuFamily = ANDROID_CPU_FAMILY_MIPS;
|
||||
#endif /* _MIPS_ARCH */
|
||||
}
|
||||
|
||||
|
||||
AndroidCpuFamily
|
||||
android_getCpuFamily(void)
|
||||
AndroidCpuFamily android_getCpuFamily(void)
|
||||
{
|
||||
pthread_once(&g_once, android_cpuInit);
|
||||
return g_cpuFamily;
|
||||
}
|
||||
|
||||
|
||||
uint64_t
|
||||
android_getCpuFeatures(void)
|
||||
uint64_t android_getCpuFeatures(void)
|
||||
{
|
||||
pthread_once(&g_once, android_cpuInit);
|
||||
return g_cpuFeatures;
|
||||
}
|
||||
|
||||
|
||||
int
|
||||
android_getCpuCount(void)
|
||||
int android_getCpuCount(void)
|
||||
{
|
||||
pthread_once(&g_once, android_cpuInit);
|
||||
return g_cpuCount;
|
||||
|
Loading…
Reference in New Issue
Block a user