Mercurial > hg > truffle
comparison src/cpu/x86/vm/vm_version_x86.cpp @ 681:fbde8ec322d0
6761600: Use sse 4.2 in intrinsics
Summary: Use SSE 4.2 in intrinsics for String.{compareTo/equals/indexOf} and Arrays.equals.
Reviewed-by: kvn, never, jrose
| author | cfang |
|---|---|
| date | Tue, 31 Mar 2009 14:07:08 -0700 |
| parents | c771b7f43bbf |
| children | 93c14e5562c4 |
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| 676:d3676b4cb78c | 681:fbde8ec322d0 |
|---|---|
| 406 if( supports_sse4_2() && supports_ht() ) { // Newest Intel cpus | 406 if( supports_sse4_2() && supports_ht() ) { // Newest Intel cpus |
| 407 if( FLAG_IS_DEFAULT(UseUnalignedLoadStores) && UseXMMForArrayCopy ) { | 407 if( FLAG_IS_DEFAULT(UseUnalignedLoadStores) && UseXMMForArrayCopy ) { |
| 408 UseUnalignedLoadStores = true; // use movdqu on newest Intel cpus | 408 UseUnalignedLoadStores = true; // use movdqu on newest Intel cpus |
| 409 } | 409 } |
| 410 } | 410 } |
| 411 if( supports_sse4_2() && UseSSE >= 4 ) { | |
| 412 if( FLAG_IS_DEFAULT(UseSSE42Intrinsics)) { | |
| 413 UseSSE42Intrinsics = true; | |
| 414 } | |
| 415 } | |
| 411 } | 416 } |
| 412 } | 417 } |
| 413 | 418 |
| 414 // Use population count instruction if available. | 419 // Use population count instruction if available. |
| 415 if (supports_popcnt()) { | 420 if (supports_popcnt()) { |