182 lines
3.8 KiB
Groff
182 lines
3.8 KiB
Groff
.TH EM_MES 3 "$Revision$"
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.ad
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.SH NAME
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em_mes \- EM-message generating routines
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.SH SYNOPSIS
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.nf
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.B #include <em.h>
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.PP
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.B void C_ms_err()
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.PP
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.B void C_ms_opt()
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.PP
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.B void C_ms_emx(wsiz, psiz)
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.B arith wsiz, psiz;
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.PP
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.B #include <em_reg.h>
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.B void C_ms_reg(offs, siz, class, prior)
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.B arith offs, siz;
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.B int class, prior;
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.PP
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.B void C_ms_src(nlines, filnam)
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.B int nlines;
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.B char *filnam;
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.PP
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.B void C_ms_flt()
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.PP
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.B void C_ms_com(str)
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.B char *str;
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.PP
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.B void C_ms_par(nparams)
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.B arith nparams;
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.PP
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.B #include <em_ego.h>
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.B void C_ms_ego(hint, offs, siz, regno)
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.B int hint, regno;
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.B arith offs, siz;
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.PP
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.B void C_ms_gto()
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.PP
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.B void C_ms_stb_cst(s, e1, e2, e3)
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.B char *s;
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.B int e1, e2;
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.B arith e3;
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.PP
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.B void C_ms_stb_dlb(s, e1, e2, l, off)
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.B char *s;
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.B int e1, e2;
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.B label l;
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.B arith off;
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.PP
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.B void C_ms_stb_dnam(s, e1, e2, l, off)
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.B char *s;
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.B int e1, e2;
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.B char *l;
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.B arith off;
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.PP
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.B void C_ms_stb_ilb(s, e1, e2, l)
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.B char *s;
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.B int e1, e2;
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.B label l;
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.PP
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.B void C_ms_stb_pnam(s, e1, e2, p)
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.B char *s;
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.B int e1, e2;
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.B char *p;
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.PP
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.B void C_ms_std(s, e1, l)
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.B char *s;
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.B int e1;
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.B int l;
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.fi
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.SH DESCRIPTION
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This set of routines forms a front end for the
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.IR em_code (3)
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module.
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The philosophy behind this package is to provide a single routine for
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each type of EM message that is generated by a front-end compiler.
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Each routine internally builds a message instruction by using the
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.BR C_mes_begin ,
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.B C_mes_end
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and the
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.BI C_ cstp
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routines from the
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.I em_code
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module.
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The actions taken by these functions depend on the type of
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.I em_code
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module that is loaded together with this module.
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The routines described here do not prevent the user from directly
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composing EM messages himself.
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.PP
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.BR C_ms_err ()
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generates a message that indicates some error during the compilation.
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.PP
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.BR C_ms_opt ()
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causes any optimization to be suppressed.
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.PP
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.BR C_ms_emx ()
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indicates the wordsize
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.I wsiz
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and pointersize
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.IR psiz .
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This must be the first code generated, or the generated code is illegal.
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.PP
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.BR C_ms_reg ()
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can be used to indicate that a local variable, having offset
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.I offs
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and size (in bytes)
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.IR siz ,
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may be stored in a register.
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.I Class
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indicates the use of the variable.
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The following classes are allowed (the names are defined in em_reg.h):
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.RS
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.IP reg_any 12
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no specific type
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.IP reg_loop 12
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loop control variable
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.IP reg_pointer 12
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pointer variable
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.IP reg_float 12
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floating point variable
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.LP
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.RE
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.I Prior
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is taken to be the priority of the variable; higher numbers indicate
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better candidates.
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.PP
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.BR C_ms_src ()
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produces an indication of the number of source lines,
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.IR nlines ,
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in file
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.IR filnam .
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This information can be used by a profiler.
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.PP
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.BR C_ms_flt ()
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produces an indication that floating-point operations are used.
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.PP
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.BR C_ms_com ()
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causes the string
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.I str
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to be inserted as comment in the resulting output.
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Note that this routine does not provide the full semantics of EM in this
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area, but the user himself can build a comment message with other types
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of comment if he likes.
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.PP
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.BR C_ms_par ()
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produces an indication that no more than
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.I nbytes
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of parameters are accessed, either directly or indirectly.
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.PP
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.BR C_ms_ego ()
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produces a hint from the EM global optimizer.
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The parameters needed are conform to the format of the message.
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.PP
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.BR C_ms_gto ()
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can be invoked to indicate that a procedure uses a non-local goto.
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.PP
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The
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.B C_ms_stb
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and
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.B C_ms_std
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routines produce a message that a back-end can use for (debugger) symbol table
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entries.
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.SH FILES
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.nf
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~em/modules/h/em.h
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~em/h/em_reg.h
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~em/h/em_ego.h
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~em/modules/lib/libem_mes.a
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.fi
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.SH MODULES
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em_code(3)
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.SH SEE ALSO
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em_code(3), read_em(3)
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.SH DIAGNOSTICS
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None of the functions return a value.
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.SH REMARKS
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There is no
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.BR C_ms_ext ()
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routine, since this message uses a variable number of arguments.
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