Effective VLIW compilation requires optimizing across basic block boundaries. In this mildly opinionated paper we survey a variety of techniques which allow the compiler to do so.

IA-64 EPIC Explicitly Parallel Instruction Computing, aka VLIW IA-64 architecture, Itanium implementation

Lecture 26: VLIW & Superscalar ° 高性能流水线高性能流水线高性能流水线高性能流水线指令级并行指令级并行指令级并行- 指令级并行

Combines VLIW with extensive SIMD (single instruction, multiple data) to get massive parallelism Using SIMD, can perform eight 16x16-bit fixed-point multiplications per cycle (4X the 'C62xx)

What is VLIW? Very Long Instruction Word architecture Hardware designed to execute multiple instructions in parallel Instructions to be executed are statically scheduled by compiler Example VLIW instruction “packet”, performs 29 RISC-style operations in one cycle: 64-bit Load and 64-bit Store with post-update addressing

Idea: Find independent operations within a trace to pack into VLIW instructions. There may be conditional branches from the middle of the trace (side exits) and transitions from other traces into the middle of the trace (side entrances). These control …

What Is VLIW? VLIW hardware is simple and straightforward, VLIW separately directs each functional unit

VLIW strongly resembles SIMD, in that operations are performed synchronously and in the same context; the difference is that different processing units perform different operations. This leads to a comparative question: are there fine-grained VLIW systems which operate on bit-wide (or few-bit-wide) data pipelines (compare Abacus)? What are they ...

2024年1月7日 · The technical report delves into the intricacies of Very Long Instruction Word (VLIW) architecture. It covers the fundamental principles, design considerations, and advantages of VLIW in...

• VLIW: tradeoff instruction space for simple decoding – The long instruction word has room for many operations – By definition, all the operations the compiler puts in the long instruction word can execute in parallel – E.g., 2 integer operations, 2 FP ops, 2 Memory refs, 1 branch