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8026049: (bf) Intrinsify ByteBuffer.put{Int, Double, Float, ...} methods

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Use unaligned Unsafe loads and stores for ByteBuffer access on platforms which support unaligned access. Add intrinsics for Unsafe.{get,put}-X-Unaligned methods.

Reviewed-by: dholmes, jrose, psandoz, kvn
This commit is contained in:
Andrew Haley 2015-03-31 12:31:18 -07:00
parent 61aa1cfdef
commit 1dfbc44c1f
11 changed files with 486 additions and 7 deletions
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14
hotspot/src/share/vm/classfile/vmSymbols.hpp
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@ -953,6 +953,20 @@
do_intrinsic(_putFloatVolatile, sun_misc_Unsafe, putFloatVolatile_name, putFloat_signature, F_RN) \
do_intrinsic(_putDoubleVolatile, sun_misc_Unsafe, putDoubleVolatile_name, putDouble_signature, F_RN) \
\
do_name(getShortUnaligned_name,"getShortUnaligned") do_name(putShortUnaligned_name,"putShortUnaligned") \
do_name(getCharUnaligned_name,"getCharUnaligned") do_name(putCharUnaligned_name,"putCharUnaligned") \
do_name(getIntUnaligned_name,"getIntUnaligned") do_name(putIntUnaligned_name,"putIntUnaligned") \
do_name(getLongUnaligned_name,"getLongUnaligned") do_name(putLongUnaligned_name,"putLongUnaligned") \
\
do_intrinsic(_getShortUnaligned, sun_misc_Unsafe, getShortUnaligned_name, getShort_signature, F_R) \
do_intrinsic(_getCharUnaligned, sun_misc_Unsafe, getCharUnaligned_name, getChar_signature, F_R) \
do_intrinsic(_getIntUnaligned, sun_misc_Unsafe, getIntUnaligned_name, getInt_signature, F_R) \
do_intrinsic(_getLongUnaligned, sun_misc_Unsafe, getLongUnaligned_name, getLong_signature, F_R) \
do_intrinsic(_putShortUnaligned, sun_misc_Unsafe, putShortUnaligned_name, putShort_signature, F_R) \
do_intrinsic(_putCharUnaligned, sun_misc_Unsafe, putCharUnaligned_name, putChar_signature, F_R) \
do_intrinsic(_putIntUnaligned, sun_misc_Unsafe, putIntUnaligned_name, putInt_signature, F_R) \
do_intrinsic(_putLongUnaligned, sun_misc_Unsafe, putLongUnaligned_name, putLong_signature, F_R) \
\
/* %%% these are redundant except perhaps for getAddress, but Unsafe has native methods for them */ \
do_signature(getByte_raw_signature, "(J)B") \
do_signature(putByte_raw_signature, "(JB)V") \