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**651**- (**download**) (**annotate**)*Thu Jun 1 18:34:03 2000 UTC*(19 years ago) by*monnier*File size: 1301 byte(s)

bring revisions from the vendor branch to the trunk

Additions to the instruction set ===================================== 1. SHnADD[O] instructions, which performs a*(2^n)+b 2. Branch on bit instruction (BB) 3. Single precision floating points + lots of other conversion ops 4. Loads and stores with scaled indexed and auto increment addressing modes New optimizations in the HPPA backend ===================================== 1. An expressions such as a*n+b where n = 2, 4, and 8 now emits SHnADD[O] instructions. 2. An expression such as BCC(T.CMP(T.NE,0,T.ANDB(mask,e)) where mask is a power of 2 now emits BB instructions. SML/NJ: this improves boxity testing code by replacing 3 instructions with 1 instruction. 3. Strength reduction for multiplication with small constants. SML/NJ: benefits array indexing and multiway branches 4 Addressing modes computation now takes into account of scaled indexed mode. Unfortunately, due to tagging this optimizations is not used in SML/NJ. 5 Propagation of annotations 6 Delay slot filling has been added 7 NOTB folding has been implemented. This combines NOTB with other bit ops such as ANDB, ORB, XORB. 8. COND expressions now generate the composite instruction sequence: COMCLR,cc r1, r2, t LDO i(b), t

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