Epson S5U1C17001C, Manual

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S5U1C17001C ManUal
EPSOn
4-5
(C COMPilEr PaCkagE fOr S1C17 faMily) (Ver. 1.5.0)
4 SOUrCE filES
4
SrcFiles
4.3 grammar of assembly Source
4.3.1 Statements
Each individual instruction or definition of an assembly source is called a statement. The basic composition of a
statement is as follows:
Syntax pattern
1 <Mnemonic>
(
<Operands>
) (
;
<Comment>
)
2 <Assembler directive>
(
<Parameters>
) (
;
<Comment>
)
3 <Label>
:
(
;
<Comment>
)
4
;
<Comment>
5 <Extended instruction> <Operands>
(
;
<Comment>
)
6 <Preprocessor directive>
(
<Parameters>
) (
;
<Comment>
)
Example:
————————————————–—————
Statement
———————————–————————— —
Syntax pattern
—
; boot.s 4
; boot program 4
#define SP_INI,0x3f00 ; Stack pointer value
6
.text 2
.long BOOT ; BOOT VECTOR 2
BOOT: 3
xld.a %sp,SP_INI ; set SP 5
xcall main ; goto main 5
jpr BOOT ; infinity loop 1
: : :
The example given above is an ordinary source description method. For increased visibility, the elements
composing each statement are aligned with tabs and spaces.
restrictions
• Only one statement can be described in one line. A description containing more than two instructions in one
line will result in an error. However, comments may be described in the same line with an instruction or label.
Example:
;OK
BOOT: ld %r1,%r2
ld %r0,%r1
;Error
BOOT: ld %r1,%r2 ld %r0,%r1
• One statement cannot be described in more than one line. A statement not complete in one line will result in
an error.
Example:
;OK
ld %r1,%r2
;Error
ld %r1,
%r2
• The usable characters are limited to ASCII characters (alphanumeric symbols), except for use in comments.
Also, the usable symbols have certain limitations (details below).
Comments can be described using other characters than ASCII characters. When using non-ASCII characters
(such as Chinese characters) for comments, use /* · · · */ as the comment symbol.