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src/hotspot/cpu/aarch64/vm_version_aarch64.cpp

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8248238: Adding Windows support to OpenJDK on AArch64

Summary: LP64 vs LLP64 changes to add Windows support

Contributed-by: Monica Beckwith <monica.beckwith@microsoft.com>, Ludovic Henry <luhenry@microsoft.com>
Reviewed-by:


 144     if (PrefetchCopyIntervalInBytes >= 32768)
 145       PrefetchCopyIntervalInBytes = 32760;
 146   }
 147 
 148   if (AllocatePrefetchDistance !=-1 && (AllocatePrefetchDistance & 7)) {
 149     warning("AllocatePrefetchDistance must be multiple of 8");
 150     AllocatePrefetchDistance &= ~7;
 151   }
 152 
 153   if (AllocatePrefetchStepSize & 7) {
 154     warning("AllocatePrefetchStepSize must be multiple of 8");
 155     AllocatePrefetchStepSize &= ~7;
 156   }
 157 
 158   if (SoftwarePrefetchHintDistance != -1 &&
 159        (SoftwarePrefetchHintDistance & 7)) {
 160     warning("SoftwarePrefetchHintDistance must be -1, or a multiple of 8");
 161     SoftwarePrefetchHintDistance &= ~7;
 162   }
 163 
 164   unsigned long auxv = getauxval(AT_HWCAP);
 165 
 166   char buf[512];
 167 
 168   _features = auxv;
 169 
 170   int cpu_lines = 0;
 171   if (FILE *f = fopen("/proc/cpuinfo", "r")) {
 172     // need a large buffer as the flags line may include lots of text
 173     char buf[1024], *p;
 174     while (fgets(buf, sizeof (buf), f) != NULL) {
 175       if ((p = strchr(buf, ':')) != NULL) {
 176         long v = strtol(p+1, NULL, 0);
 177         if (strncmp(buf, "CPU implementer", sizeof "CPU implementer" - 1) == 0) {
 178           _cpu = v;
 179           cpu_lines++;
 180         } else if (strncmp(buf, "CPU variant", sizeof "CPU variant" - 1) == 0) {
 181           _variant = v;
 182         } else if (strncmp(buf, "CPU part", sizeof "CPU part" - 1) == 0) {
 183           if (_model != v)  _model2 = _model;
 184           _model = v;
 185         } else if (strncmp(buf, "CPU revision", sizeof "CPU revision" - 1) == 0) {
 186           _revision = v;
 187         } else if (strncmp(buf, "flags", sizeof("flags") - 1) == 0) {
 188           if (strstr(p+1, "dcpop")) {
 189             _dcpop = true;
 190           }
 191         }
 192       }
 193     }
 194     fclose(f);
 195   }
 196 




 144     if (PrefetchCopyIntervalInBytes >= 32768)
 145       PrefetchCopyIntervalInBytes = 32760;
 146   }
 147 
 148   if (AllocatePrefetchDistance !=-1 && (AllocatePrefetchDistance & 7)) {
 149     warning("AllocatePrefetchDistance must be multiple of 8");
 150     AllocatePrefetchDistance &= ~7;
 151   }
 152 
 153   if (AllocatePrefetchStepSize & 7) {
 154     warning("AllocatePrefetchStepSize must be multiple of 8");
 155     AllocatePrefetchStepSize &= ~7;
 156   }
 157 
 158   if (SoftwarePrefetchHintDistance != -1 &&
 159        (SoftwarePrefetchHintDistance & 7)) {
 160     warning("SoftwarePrefetchHintDistance must be -1, or a multiple of 8");
 161     SoftwarePrefetchHintDistance &= ~7;
 162   }
 163 
 164   uint64_t auxv = getauxval(AT_HWCAP);
 165 
 166   char buf[512];
 167 
 168   _features = auxv;
 169 
 170   int cpu_lines = 0;
 171   if (FILE *f = fopen("/proc/cpuinfo", "r")) {
 172     // need a large buffer as the flags line may include lots of text
 173     char buf[1024], *p;
 174     while (fgets(buf, sizeof (buf), f) != NULL) {
 175       if ((p = strchr(buf, ':')) != NULL) {
 176         int64_t v = strtol(p+1, NULL, 0);
 177         if (strncmp(buf, "CPU implementer", sizeof "CPU implementer" - 1) == 0) {
 178           _cpu = v;
 179           cpu_lines++;
 180         } else if (strncmp(buf, "CPU variant", sizeof "CPU variant" - 1) == 0) {
 181           _variant = v;
 182         } else if (strncmp(buf, "CPU part", sizeof "CPU part" - 1) == 0) {
 183           if (_model != v)  _model2 = _model;
 184           _model = v;
 185         } else if (strncmp(buf, "CPU revision", sizeof "CPU revision" - 1) == 0) {
 186           _revision = v;
 187         } else if (strncmp(buf, "flags", sizeof("flags") - 1) == 0) {
 188           if (strstr(p+1, "dcpop")) {
 189             _dcpop = true;
 190           }
 191         }
 192       }
 193     }
 194     fclose(f);
 195   }
 196
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