New patterns, man page changes, other little fixes
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bruce
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@ -5,7 +5,7 @@ em_nopt \- EM peephole optimizer
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.SH SYNOPSIS
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~em/lib/em_nopt [ inputfile [ outputfile ] ]
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.SH DESCRIPTION
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Em_nopt reads a compact EM-program, inputfile or standard input,
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Em_nopt reads a compact EM-program inputfile or standard input,
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and produces another compact EM program on outputfile or standard output
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that is functionally equivalent,
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but smaller.
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@ -70,20 +70,24 @@ used in compilers and other EM code producing programs. The interface
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routines are identical to the EM_CODE(3) procedure interface except that all
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names have been replaced by
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.I O_xxx
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. It is possible to convert
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a program that is currently using the EM_CODE interface by defining PEEPHOLE
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before including em.h which enables a series of macros to map all the
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It is possible to convert
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a program that is currently using the EM_CODE interface
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to use this module instead by defining
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.I PEEPHOLE
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before including
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.I em.h.
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This defines a series of macros to map all the
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.I C_xxx
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names to the corresponding
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.I O_xxx
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names. The module in turn calls
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.I C_xxx
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routines to output the optimized code. Hence it is possible to add peephole
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optimization to any program that outputs EM code usng the EM_CODE module.
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optimization to any program that outputs EM code using the EM_CODE module.
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.PP
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Details of the
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.I O_xxx
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routines may be obtained by refering to the description
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routines may be obtained by referring to the description
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of the corresponding
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.I C_xxx
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routine in EM_CODE(3).
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@ -94,7 +98,7 @@ routine in EM_CODE(3).
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.fi
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.SH MODULES
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.nf
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alloc(3), system(3), string(3)
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alloc(3), system(3), string(3), em_code(3)
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.fi
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.SH SEE ALSO
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em_nopt(1) em_code(3), read_em(3), em_mes(3)
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@ -10,10 +10,12 @@
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#include <em.h>
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#include <em_comp.h>
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#include <system.h>
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#include <idf_pkg.spec>
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#include <emO_code.h>
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#define OTHER 255
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#define OTHER 0
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#define op_lab sp_fpseu
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typedef struct e_instr *p_instr;
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#define FLUSHDFA() if(OO_state) {\
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*OO_nxtpatt++ = OO_OTHER; OO_dfa(OTHER);\
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@ -22,10 +24,6 @@
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#define GETINSTR() (OO_nxtifree>OO_freeiqueue)?*(--OO_nxtifree):\
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((p_instr)Malloc(sizeof(struct e_instr)))
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#define op_lab sp_ilb1
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typedef struct e_instr *p_instr;
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extern p_instr *OO_freeiqueue;
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extern p_instr *OO_nxtifree;
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extern p_instr *OO_patternqueue;
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@ -175,16 +175,20 @@ loc 1 mlu w :
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ldc 1 mlu 2*w :
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loc 1 sbi w : dec
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loc loe mli w : loe $2 loc $1 mli w
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loc loe mlu w : loe $2 loc $1 mlu w
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loc loe adi w loc : loe $2 loc $1 adi w loc $4
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loc loe adi w inc : loe $2 loc $1 adi w inc
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loc loe adi w dec : loe $2 loc $1 adi w dec
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loc lol mli w : lol $2 loc $1 mli w
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loc lol mlu w : lol $2 loc $1 mlu w
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loc lol adi w loc : lol $2 loc $1 adi w loc $4
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loc lol adi w inc : lol $2 loc $1 adi w dec
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loc lol adi w dec : lol $2 loc $1 adi w dec
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ldc lde mli 2*w : lde $2 ldc $1 mli 2*w
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ldc lde mlu 2*w : lde $2 ldc $1 mlu 2*w
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ldc lde adi 2*w : lde $2 ldc $1 adi 2*w
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ldc ldl mli 2*w : ldl $2 ldc $1 mli 2*w
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ldc ldl mlu 2*w : ldl $2 ldc $1 mlu 2*w
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ldc ldl adi 2*w : ldl $2 ldc $1 adi 2*w
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loc 2 mli w : loc 1 sli w
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loc 4 mli w : loc 2 sli w
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@ -407,6 +411,8 @@ loi 1 loc 1 loc w cii loc cmi w zne ? $5>=0&&$5<128 : loi 1 loc $5 cmi w zne
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loi 1 loc 1 loc w cii loc w loc w ciu loc 255 and w: loi 1
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cmp teq : cms p teq
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cmp tne : cms p tne
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cmp zeq : cms p zeq $2
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cmp zne : cms p zne $2
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cmu defined teq : cms $1 teq
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cmu defined tne : cms $1 tne
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cms w zeq : beq $2
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@ -427,6 +433,7 @@ adp dup p sdl adp -$1 ? p==2*w : dup p adp $1 sdl $3
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inc dup w ste dec : dup w inc ste $3
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inc dup w stl dec : dup w inc stl $3
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#endif
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bra lab $1 : lab $2
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zeq bra lab $1 : zne $2 lab $1
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zge bra lab $1: zlt $2 lab $1
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zgt bra lab $1 : zle $2 lab $1
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@ -542,8 +549,8 @@ lal loi 4*w loc loc loc loc ior 4*w ? ($3==0)+($4==0)+($5==0)+($6==0)>2 :
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lol $1+3*w loc $3 ior w lol $1+2*w loc $4 ior w lol $1+w loc $5 ior w lol $1 loc $6 ior w
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loc dup 2 stl loc dup 2 stl :
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loc $1 stl $3 loc $4 stl $6 loc $1 loc $4
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/*LLP LLP adp SLP $2 sti ? (!notreg($2) || $5!=p): */
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/* LLP $1 sti $5 LLP $2 adp $3 SLP $4 */
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lol lol adp stl $2 sti != p ? p==w : lol $1 sti $5 lol $2 adp $3 stl $4
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ldl ldl adp sdl $2 sti != p ? p==2*w : ldl $1 sti $5 ldl $2 adp $3 sdl $4
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loe loe adp ste $2 sti !=p ? p==w : loe $1 sti $5 loe $2 adp $3 ste $4
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lde lde adp sde $2 sti !=p ? p==2*w : lde $1 sti $5 lde $2 adp $3 sde $4
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#ifndef INT
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