1.1 --- a/src/cpu/x86/vm/vm_version_x86.cpp Sun Dec 23 17:08:22 2012 +0100
1.2 +++ b/src/cpu/x86/vm/vm_version_x86.cpp Thu Jan 03 15:09:55 2013 -0800
1.3 @@ -429,7 +429,7 @@
1.4 }
1.5
1.6 char buf[256];
1.7 - jio_snprintf(buf, sizeof(buf), "(%u cores per cpu, %u threads per core) family %d model %d stepping %d%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s",
1.8 + jio_snprintf(buf, sizeof(buf), "(%u cores per cpu, %u threads per core) family %d model %d stepping %d%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s",
1.9 cores_per_cpu(), threads_per_core(),
1.10 cpu_family(), _model, _stepping,
1.11 (supports_cmov() ? ", cmov" : ""),
1.12 @@ -446,6 +446,7 @@
1.13 (supports_avx() ? ", avx" : ""),
1.14 (supports_avx2() ? ", avx2" : ""),
1.15 (supports_aes() ? ", aes" : ""),
1.16 + (supports_erms() ? ", erms" : ""),
1.17 (supports_mmx_ext() ? ", mmxext" : ""),
1.18 (supports_3dnow_prefetch() ? ", 3dnowpref" : ""),
1.19 (supports_lzcnt() ? ", lzcnt": ""),
1.20 @@ -671,6 +672,16 @@
1.21 FLAG_SET_DEFAULT(UsePopCountInstruction, false);
1.22 }
1.23
1.24 + // Use fast-string operations if available.
1.25 + if (supports_erms()) {
1.26 + if (FLAG_IS_DEFAULT(UseFastStosb)) {
1.27 + UseFastStosb = true;
1.28 + }
1.29 + } else if (UseFastStosb) {
1.30 + warning("fast-string operations are not available on this CPU");
1.31 + FLAG_SET_DEFAULT(UseFastStosb, false);
1.32 + }
1.33 +
1.34 #ifdef COMPILER2
1.35 if (FLAG_IS_DEFAULT(AlignVector)) {
1.36 // Modern processors allow misaligned memory operations for vectors.
