Combine a move + jump sequence into the move_jump instruction

That will save one word and small amount of time for each occurrence.
jkoops · Jan 17, 2011 · 51ddd20 · 51ddd20
1 parent 40dd4f8
commit 51ddd20
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diff --git 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
@@ -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