From 5ef24f692303a64eec423177d7ae982847d135d7 Mon Sep 17 00:00:00 2001 From: kaashoek Date: Wed, 25 Nov 1987 14:22:15 +0000 Subject: [PATCH] Comments added --- util/ceg/EM_parser/common/C_instr2.c | 24 ++++++++++++++++++++++++ 1 file changed, 24 insertions(+) diff --git a/util/ceg/EM_parser/common/C_instr2.c b/util/ceg/EM_parser/common/C_instr2.c index adf87f4db..750c2933f 100644 --- a/util/ceg/EM_parser/common/C_instr2.c +++ b/util/ceg/EM_parser/common/C_instr2.c @@ -1,5 +1,29 @@ #include "decl.h" +/* This file contains two arrays with information concerning the C_INSTR tokens: + * t_C_info C_info[]; - Describes the arguments of EM-instructions + * struct ? EM_instr[]; - Contains per entry: + * 1) The name of the C_INSTR + * 2) The type of its argument, an index in + * C_info[]. + * 3) The segment for which code/data must + * be generated. + * The array is sorted on the C_INSTR-name. + * + * Furthermore there are two routines present in this file : + * set_C_instr_info( instr) - It looks 'instr' up in EM_instr[] and + * char *instr; - sets the global variables + * - 'C_instr_info' and 'segment'. + * + * arg_type( arg) - 'arg' must be a string starting with a '$' + * char *arg; - and a number. arg_type() will return the + * - type of the 'number'th argment of the current + * - C_INSTR. + * - For example, if the EM_table contains: + * C_loc ==> "pushl $1". + * then arg_type( "$1") will return ARITH. + */ + t_C_info C_info[] = { /* NO_ARGS */ { "()\n{\n", -- 2.34.1