Add 32 bit compressed pointer support.

JerryScript-DCO-1.0-Signed-off-by: Zoltan Herczeg zherczeg.u-szeged@partner.samsung.com
2016-09-01 01:44:08 -07:00
parent 9ca78d380f
commit da47dedaed
19 changed files with 271 additions and 173 deletions
@@ -243,10 +243,11 @@ Compressed pointers were introduced to save heap space.

 ![Compressed Pointer](img/ecma_compressed.png)

-These pointers are 8 byte aligned 16 bit long pointers which can address 512 Kb of memory which is also the maximum size of the JerryScript heap.
-
-ECMA data elements are allocated in pools (pools are allocated on heap)
-Chunk size of the pool is 8 bytes (reduces fragmentation).
+These pointers are 8 byte aligned 16 bit long pointers which can address 512 Kb of
+memory which is also the maximum size of the JerryScript heap. To support even more
+memory the size of compressed pointers can be extended to 32 bit to cover the entire
+address space of a 32 bit system by passing "--cpointer_32_bit on" to the build
+system. These "uncompressed pointers" increases the memory consumption by around 20%.

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