Epson S5U1C17001C, Manual

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Reference
Assembler as (1) Development Tools
Outline
This tool assembles assembly source files output by the C compiler and converts
the mnemonics of the source files into object codes (machine language) of the
S1C17. The
as.exe
allows the user to invoke the assembler through
xgcc.exe
, this
makes it possible to include preprocessor directives into assembly source files. The
results are output in an object file that can be linked or added to a library.
Flowchart
Major Command-line Options
-o <filename>
Specify output file name
-a
[ <suboption> ] Output assembly list file
Example:
-adhl
(high-level assembly listing without debugging
directives)
--gstabs
Add debugging information with relative path to source files
-mpointer16
Specify 16-bit pointer mode
-mc17_ext <dumpfile> <mapfile>
Optimize extended instructions
Major Preprocessor Pseudo-instructions
#include
Insertion of file
#define
Definition/macro definition of character string and numeric
value
#if – #else – #endif
Conditional assembly
(Can be used when the
-c -xassembler-with-cpp
option of
xgcc
is specified.)
Major Assembler Pseudo-instructions
.text
Declare .text section
.section .data
Declare .data section
.section .rodata
Declare .rodata section
.section .bss
Declare .bss section
.long <data>
Define 4-byte data
.short
<data> Define 2-byte data
.byte <data>
Define 1-byte data
.ascii
<string> Define ASCII character strings
.space <length>
Define blank area (0x0)
.zero
<length> Define blank area (0x0)
.align <value>
Alignment to specify boundary address
.global
<symbol> Global declaration of symbol
.set <symbol> , <address>
Define symbol with absolute address
Start-up Command
as
<options> <filename>
<filename>
Assembly source file name
Example:
as -otest.o -adhl test.s
Assembler
as
file.s
file.o
Specify the
-c
and
-xassembler-with-cpp
options
-mc17_ext
C compiler
xgcc
Preprocessor
cpp
Assembler
as
file.s
file.o
Assembly sources
including preprocessor instructions
Object files
ld linker
Object files
ld linker
Link map and
dump files
Assembly
sources
file.d
file.map