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author | Patrik Nyblom <[email protected]> | 2009-12-07 15:25:32 +0100 |
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committer | Björn Gustavsson <[email protected]> | 2010-03-10 14:23:54 +0100 |
commit | 5a8e6c4183a30f3b10de22fa5ba80950dfb2adea (patch) | |
tree | 1b1830bf144427531d7be5aa968e02bb2e67539e /erts/emulator/beam/erl_bif_lists.c | |
parent | 356c33b6063de632f9c98c66260603e6edbc3ee5 (diff) | |
download | otp-5a8e6c4183a30f3b10de22fa5ba80950dfb2adea.tar.gz otp-5a8e6c4183a30f3b10de22fa5ba80950dfb2adea.tar.bz2 otp-5a8e6c4183a30f3b10de22fa5ba80950dfb2adea.zip |
Fit all heap data into the 32-bit address range
This is the first step in the implementation of the half-word emulator,
a 64-bit emulator where all pointers to heap data will be stored
in 32-bit words. Code specific for this emulator variant is
conditionally compiled when the HALFWORD_HEAP define has
a non-zero value.
First force all pointers to heap data to fall into a single 32-bit range,
but still store them in 64-bit words.
Temporary term data stored on C stack is moved into scheduler specific
storage (allocated as heaps) and macros are added to make this
happen only in emulators where this is needed. For a vanilla VM the
temporary terms are still stored on the C stack.
Diffstat (limited to 'erts/emulator/beam/erl_bif_lists.c')
-rw-r--r-- | erts/emulator/beam/erl_bif_lists.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/erts/emulator/beam/erl_bif_lists.c b/erts/emulator/beam/erl_bif_lists.c index a9e8dd86f7..5df4783fcb 100644 --- a/erts/emulator/beam/erl_bif_lists.c +++ b/erts/emulator/beam/erl_bif_lists.c @@ -89,13 +89,14 @@ BIF_RETTYPE append_2(BIF_ALIST_2) BIF_RET(copy); } +#define SMALL_VEC_SIZE 10 BIF_RETTYPE subtract_2(BIF_ALIST_2) { Eterm list; Eterm* hp; Uint need; Eterm res; - Eterm small_vec[10]; /* Preallocated memory for small lists */ + Eterm small_vec[SMALL_VEC_SIZE]; /* Preallocated memory for small lists */ Eterm* vec_p; Eterm* vp; int i; @@ -115,7 +116,7 @@ BIF_RETTYPE subtract_2(BIF_ALIST_2) BIF_RET(BIF_ARG_1); /* allocate element vector */ - if (n <= sizeof(small_vec)/sizeof(small_vec[0])) + if (n <= SMALL_VEC_SIZE) vec_p = small_vec; else vec_p = (Eterm*) erts_alloc(ERTS_ALC_T_TMP, n * sizeof(Eterm)); |