Compatibility Note A.06

LSS, EQL, LEQ, GTR, NEQ, GEQ, NUL, GTN.

Use of branch prediction op codes may result in incompatible behavior.

B4900
V300
V500
Employs a branch prediction scheme whereby various op codes indicate the most probable branch path.
Branch Prediction
Op Code
Equivalent Branch
Op Code
Predicted Branch Path
21 21(LSS) Not Taken (last time not taken)
22 22(EQL) Not Taken (last time not taken)
23 23(LES) Not Taken (last time not taken)
24 24(GTR) Not Taken (last time not taken)
25 25(NEQ) Not Taken (last time not taken)
26 26(GEQ) Not Taken (last time not taken)
2a 2a(NUL) Not Taken (last time not taken)
2b 2b(GTN) Not Taken (last time not taken)
B1 21(LSS) Not Taken (last time taken)
B2 22(EQL) Not Taken (last time taken)
B3 23(LES) Not Taken (last time taken)
B4 24(GTR) Not Taken (last time taken)
B5 25(NEQ) Not Taken (last time taken)
B6 26(GEQ) Not Taken (last time taken)
Ba 2a(NUL) Not Taken (last time taken)
Bb 2b(GTN) Not Taken (last time taken)
E1 21(LSS) Taken (last time not taken)
E2 22(EQL) Taken (last time not taken)
E3 23(LES) Taken (last time not taken)
E4 24(GTR) Taken (last time not taken)
E5 25(NEQ) Taken (last time not taken)
E6 26(GEQ) Taken (last time not taken)
Ea 2a(NUL) Taken (last time not taken)
Eb 2b(GTN) Taken (last time not taken)
F1 21(LSS) Taken (last time taken)
F2 22(EQL) Taken (last time taken)
F3 23(LES) Taken (last time taken)
F4 24(GTR) Taken (last time taken)
F5 25(NEQ) Taken (last time taken)
F6 26(GEQ) Taken (last time taken)
Fa 2a(NUL) Taken (last time taken)
Fb 2b(GTN) Taken (last time taken)
compatibility_notes/a.06.txt · Last modified: 2008/05/13 07:22 (external edit)
 
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