conditional instructions of
- By carefully examining the layout of the ARM1 processor, it can be reverse engineered. This article describes the interesting circuit used for conditional instructions: this circuit is marked in red on the die photo below. Unlike most processors, the ARM executes every instruction conditionally. Each instruction specifies a condition and is only executed if the condition is satisfied. For every instruction, the condition circuit reads the condition from the instruction register (blue), evaluates the condition flags (purple), and informs the control logic (yellow) if the instruction should be executed or skipped.
- Roger Zelazny (Wikipedia)
Roger Joseph Zelazny (May 13, 1937 – June 14, 1995) was an American fantasy and science fiction writer known for his short stories and novels, best known for The Chronicles of Amber. He won the Nebula Award three times (out of 14 nominations) and the Hugo Award six times (also out of 14 nominations), including two Hugos for novels: the serialized novel …And Call Me Conrad (1965), subsequently published under the title This Immortal (1966), and the novel Lord of Light (1967).