Intel Itanium 9150M, Руководство пользователя

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Volume 3: Resource and Dependency Semantics 3:383
5.3.3 WAW Dependency Table
General rules specific to the WAW table:
• All resources require at most an instruction group break to provide sequential
behavior.
• Some resources require no instruction group break to provide sequential behavior.
• There are a few special cases that are described in greater detail elsewhere in the
manual and are indicated with an SC (special case) result.
• Each sub-row of writers represents a group of instructions that when taken in pairs
in any combination has the dependency result indicated. If the column is split in
sub-columns, then the dependency semantics apply to any pair of instructions
where one is chosen from left sub-column and one is chosen from the right
sub-column.
Table 5-3. WAW Dependencies Organized by Resource
Resource Name Writers
Semantics of
Dependency
ALAT mem-readers-alat , mem-writers , chk.a.clr,
invala-all
none
AR[BSP] br.call, brl.call, br.ret, cover, mov-to-AR-BSPSTORE , rfi impliedF
AR[BSPSTORE] alloc, loadrs, flushrs, mov-to-AR-BSPSTORE impliedF
AR[CCV] mov-to-AR-CCV impliedF
AR[CFLG] mov-to-AR-CFLG impliedF
AR[CSD] ld16, mov-to-AR-CSD impliedF
AR[EC] br.ret, mod-sched-brs , mov-to-AR-EC impliedF
AR[EFLAG] mov-to-AR-EFLAG impliedF
AR[FCR] mov-to-AR-FCR impliedF
AR[FDR] mov-to-AR-FDR impliedF
AR[FIR] mov-to-AR-FIR impliedF
AR[FPSR].sf0.controls mov-to-AR-FPSR , fsetc.s0 impliedF
AR[FPSR].sf1.controls mov-to-AR-FPSR , fsetc.s1 impliedF
AR[FPSR].sf2.controls mov-to-AR-FPSR , fsetc.s2 impliedF
AR[FPSR].sf3.controls mov-to-AR-FPSR , fsetc.s3 impliedF
AR[FPSR].sf0.flags fp-arith-s0 , fcmp-s0 , fpcmp-s0 none
fclrf.s0, fcmp-s0 , fp-arith-s0 ,
fpcmp-s0 , mov-to-AR-FPSR
fclrf.s0, mov-to-AR-FPSR impliedF
AR[FPSR].sf1.flags fp-arith-s1 , fcmp-s1 , fpcmp-s1 none
fclrf.s1, fcmp-s1 , fp-arith-s1 ,
fpcmp-s1 , mov-to-AR-FPSR
fclrf.s1, mov-to-AR-FPSR impliedF
AR[FPSR].sf2.flags fp-arith-s2 , fcmp-s2 , fpcmp-s2 none
fclrf.s2, fcmp-s2 , fp-arith-s2 ,
fpcmp-s2 , mov-to-AR-FPSR
fclrf.s2, mov-to-AR-FPSR impliedF
AR[FPSR].sf3.flags fp-arith-s3 , fcmp-s3 , fpcmp-s3 none
fclrf.s3, fcmp-s3 , fp-arith-s3 ,
fpcmp-s3 , mov-to-AR-FPSR
fclrf.s3, mov-to-AR-FPSR impliedF
AR[FPSR].rv mov-to-AR-FPSR impliedF
AR[FPSR].traps mov-to-AR-FPSR impliedF
AR[FSR] mov-to-AR-FSR impliedF
AR[ITC] mov-to-AR-ITC impliedF