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added patterns for unsigned shifting

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added patterns to delay additive operations until after multiplicative,
  this can be useful for some register machines
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sater 1984-07-18 11:05:28 +00:00
parent fc59a0d703
commit 0473678491
1 changed files with 12 additions and 0 deletions
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12
util/opt/patterns
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@ -3,6 +3,8 @@ loc adi loc sbi $2==w && $4==w: loc $1-$3 adi w
ldc adi ldc sbi $2==2*w && $4==2*w: ldc $1-$3 adi 2*w
loc adi loc adi $2==w && $4==w: loc $1+$3 adi w
ldc adi ldc adi $2==2*w && $4==2*w: ldc $1+$3 adi 2*w
loc adi loc mli $2==w && $4==w: loc $3 mli w loc $1*$3 adi w
loc adi loc sli $2==w && $4==w && $3==1: loc $3 sli w loc 2*$1 adi w
adp $1==0:
adp adp : adp $1+$2
adp lof : lof $1+$2
@ -167,6 +169,14 @@ loc mli $1==32 && $2==w: loc 5 sli w
loc mli $1==64 && $2==w: loc 6 sli w
loc mli $1==128 && $2==w: loc 7 sli w
loc mli $1==256 && $2==w: loc 8 sli w
loc mlu $1==2 && $2==w: loc 1 slu w
loc mlu $1==4 && $2==w: loc 2 slu w
loc mlu $1==8 && $2==w: loc 3 slu w
loc mlu $1==16 && $2==w: loc 4 slu w
loc mlu $1==32 && $2==w: loc 5 slu w
loc mlu $1==64 && $2==w: loc 6 slu w
loc mlu $1==128 && $2==w: loc 7 slu w
loc mlu $1==256 && $2==w: loc 8 slu w
loc adi !defined($2): adi $1
loc sbi !defined($2): sbi $1
loc mli !defined($2): mli $1
@ -314,6 +324,8 @@ loc sbi loc sbi $2==w && $4==w: loc $1+$3 sbi w
ldc sbi ldc sbi $2==2*w && $4==2*w: ldc $1+$3 sbi 2*w
loc sbi loc adi $2==w && $4==w: loc $1-$3 sbi w
ldc sbi ldc adi $2==2*w && $4==2*w: ldc $1-$3 sbi 2*w
loc sbi loc mli $2==w && $4==w: loc $3 mli w loc $1*$3 sbi w
loc sbi loc sli $2==w && $4==w && $3==1: loc $3 sli w loc 2*$1 sbi w
teq teq : tne
teq tne : teq
teq zne : zeq $2