Request for reviews (L): 7196199: java/text/Bidi/Bug6665028.java failed: Bidi run count incorrect (original) (raw)

Vladimir Kozlov vladimir.kozlov at oracle.com
Fri Sep 14 09:17:37 PDT 2012

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http://cr.openjdk.java.net/~kvn/7196199/webrev

Upper bits (64-255) of XMM (YMM) registers (used for vectors in compiled code) are destroyed in 32 bit VM because movsd instructions are used to saved/restored xmm registers in safepoint interrupt handler. Also in 64-bit VM upper half of YMM registers are not saved in safepoint interrupt handler.

Always save full (128 bit) XMM registers in 32-bit VM if UseSSE >= 2. Save upper half of YMM registers during loop safepoint if a compiled method has 256bit vectors.

Thanks, Vladimir

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