diff options
Diffstat (limited to 'compiler/m68k/aoptcpu.pas')
| -rw-r--r-- | compiler/m68k/aoptcpu.pas | 38 |
1 files changed, 38 insertions, 0 deletions
diff --git a/compiler/m68k/aoptcpu.pas b/compiler/m68k/aoptcpu.pas index 4307c691f7..39ffcc9015 100644 --- a/compiler/m68k/aoptcpu.pas +++ b/compiler/m68k/aoptcpu.pas @@ -60,6 +60,7 @@ unit aoptcpu; var next: tai; tmpref: treference; + tmpsingle: single; begin result:=false; case p.typ of @@ -135,6 +136,43 @@ unit aoptcpu; taicpu(p).ops:=1; result:=true; end; + A_FCMP: + if (taicpu(p).oper[0]^.typ = top_realconst) then + begin + if (taicpu(p).oper[0]^.val_real = 0.0) then + begin + DebugMsg('Optimizer: FCMP #0.0 to FTST',p); + taicpu(p).opcode:=A_FTST; + taicpu(p).opsize:=S_FX; + taicpu(p).loadoper(0,taicpu(p).oper[1]^); + taicpu(p).clearop(1); + taicpu(p).ops:=1; + result:=true; + end + else + begin + tmpsingle:=taicpu(p).oper[0]^.val_real; + if (taicpu(p).opsize = S_FD) and + ((taicpu(p).oper[0]^.val_real - tmpsingle) = 0.0) then + begin + DebugMsg('Optimizer: FCMP const to lesser precision',p); + taicpu(p).opsize:=S_FS; + result:=true; + end; + end; + end; + A_FMOVE,A_FMUL,A_FADD,A_FSUB,A_FDIV: + if (taicpu(p).oper[0]^.typ = top_realconst) then + begin + tmpsingle:=taicpu(p).oper[0]^.val_real; + if (taicpu(p).opsize = S_FD) and + ((taicpu(p).oper[0]^.val_real - tmpsingle) = 0.0) then + begin + DebugMsg('Optimizer: FMOVE/FMUL/FADD/FSUB/FDIV const to lesser precision',p); + taicpu(p).opsize:=S_FS; + result:=true; + end; + end; end; end; end; |