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| author | Björn Gustavsson <[email protected]> | 2010-12-10 07:57:01 +0100 |
|---|---|---|
| committer | Björn Gustavsson <[email protected]> | 2011-01-17 15:23:47 +0100 |
| commit | 51ddd2047c70bce67c8644d85f5d5de72842c320 (patch) | |
| tree | 70480b071d450b925d6dd87bfa9af3b62bc88c4c /erts/emulator/beam | |
| parent | 40dd4f87b3567d087bbcb071404b871af3601241 (diff) | |
| download | otp-51ddd2047c70bce67c8644d85f5d5de72842c320.tar.gz otp-51ddd2047c70bce67c8644d85f5d5de72842c320.tar.bz2 otp-51ddd2047c70bce67c8644d85f5d5de72842c320.zip | |
Combine a move + jump sequence into the move_jump instruction
That will save one word and small amount of time for
each occurrence.
Diffstat (limited to 'erts/emulator/beam')
| -rw-r--r-- | erts/emulator/beam/beam_emu.c | 5 | ||||
| -rw-r--r-- | erts/emulator/beam/ops.tab | 8 |
2 files changed, 13 insertions, 0 deletions
diff --git a/erts/emulator/beam/beam_emu.c b/erts/emulator/beam/beam_emu.c index b90613079a..edb4d61ed2 100644 --- a/erts/emulator/beam/beam_emu.c +++ b/erts/emulator/beam/beam_emu.c @@ -688,6 +688,11 @@ extern int count_instructions; SET_I((BeamInstr *) CallDest); \ Dispatch(); +#define MoveJump(Src) \ + r(0) = (Src); \ + SET_I((BeamInstr *) Arg(0)); \ + Goto(*I); + #define GetList(Src, H, T) do { \ Eterm* tmp_ptr = list_val(Src); \ H = CAR(tmp_ptr); \ diff --git a/erts/emulator/beam/ops.tab b/erts/emulator/beam/ops.tab index 9b3d1da018..ac63b352ef 100644 --- a/erts/emulator/beam/ops.tab +++ b/erts/emulator/beam/ops.tab @@ -279,6 +279,14 @@ system_limit j move R R => +move C=cxy r | jump Lbl => move_jump Lbl C + +%macro: move_jump MoveJump -nonext +move_jump f n +move_jump f c +move_jump f x +move_jump f y + move X1=x Y1=y | move X2=x Y2=y => move2 X1 Y1 X2 Y2 move Y1=y X1=x | move Y2=y X2=x => move2 Y1 X1 Y2 X2 move X1=x X2=x | move X3=x X4=x => move2 X1 X2 X3 X4 |