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@c Copyright (C) 1991-2021 Free Software Foundation, Inc.
@c This is part of the GAS manual.
@c For copying conditions, see the file as.texinfo.
@ifset GENERIC
@end ifset
@node H8/300-Dependent
@chapter H8/300 Dependent Features
@cindex H8/300 support
* H8/300 Options:: Options
* H8/300 Syntax:: Syntax
* H8/300 Floating Point:: Floating Point
* H8/300 Directives:: H8/300 Machine Directives
* H8/300 Opcodes:: Opcodes
@end menu
@node H8/300 Options
@section Options
@cindex H8/300 options
@cindex options, H8/300
The Renesas H8/300 version of @code{@value{AS}} has one
machine-dependent option:
@c man begin OPTIONS
@table @gcctabopt
@item -h-tick-hex
Support H'00 style hex constants in addition to 0x00 style.
@item -mach=@var{name}
Sets the H8300 machine variant. The following machine names
are recognised:
@code{h8300sx} and
@end table
@c man end
@node H8/300 Syntax
@section Syntax
* H8/300-Chars:: Special Characters
* H8/300-Regs:: Register Names
* H8/300-Addressing:: Addressing Modes
@end menu
@node H8/300-Chars
@subsection Special Characters
@cindex line comment character, H8/300
@cindex H8/300 line comment character
@samp{;} is the line comment character.
@cindex line separator, H8/300
@cindex statement separator, H8/300
@cindex H8/300 line separator
@samp{$} can be used instead of a newline to separate statements.
Therefore @emph{you may not use @samp{$} in symbol names} on the H8/300.
@node H8/300-Regs
@subsection Register Names
@cindex H8/300 registers
@cindex register names, H8/300
You can use predefined symbols of the form @samp{r@var{n}h} and
@samp{r@var{n}l} to refer to the H8/300 registers as sixteen 8-bit
general-purpose registers. @var{n} is a digit from @samp{0} to
@samp{7}); for instance, both @samp{r0h} and @samp{r7l} are valid
register names.
You can also use the eight predefined symbols @samp{r@var{n}} to refer
to the H8/300 registers as 16-bit registers (you must use this form for
On the H8/300H, you can also use the eight predefined symbols
@samp{er@var{n}} (@samp{er0} @dots{} @samp{er7}) to refer to the 32-bit
general purpose registers.
The two control registers are called @code{pc} (program counter; a
16-bit register, except on the H8/300H where it is 24 bits) and
@code{ccr} (condition code register; an 8-bit register). @code{r7} is
used as the stack pointer, and can also be called @code{sp}.
@node H8/300-Addressing
@subsection Addressing Modes
@cindex addressing modes, H8/300
@cindex H8/300 addressing modes
@value{AS} understands the following addressing modes for the H8/300:
@table @code
@item r@var{n}
Register direct
@item @@r@var{n}
Register indirect
@need 1200
@item @@(@var{d}, r@var{n})
@itemx @@(@var{d}:16, r@var{n})
@itemx @@(@var{d}:24, r@var{n})
Register indirect: 16-bit or 24-bit displacement @var{d} from register
@var{n}. (24-bit displacements are only meaningful on the H8/300H.)
@item @@r@var{n}+
Register indirect with post-increment
@item @@-r@var{n}
Register indirect with pre-decrement
@item @code{@@}@var{aa}
@itemx @code{@@}@var{aa}:8
@itemx @code{@@}@var{aa}:16
@itemx @code{@@}@var{aa}:24
Absolute address @code{aa}. (The address size @samp{:24} only makes
sense on the H8/300H.)
@item #@var{xx}
@itemx #@var{xx}:8
@itemx #@var{xx}:16
@itemx #@var{xx}:32
Immediate data @var{xx}. You may specify the @samp{:8}, @samp{:16}, or
@samp{:32} for clarity, if you wish; but @code{@value{AS}} neither
requires this nor uses it---the data size required is taken from
@item @code{@@}@code{@@}@var{aa}
@itemx @code{@@}@code{@@}@var{aa}:8
Memory indirect. You may specify the @samp{:8} for clarity, if you
wish; but @code{@value{AS}} neither requires this nor uses it.
@end table
@node H8/300 Floating Point
@section Floating Point
@cindex floating point, H8/300 (@sc{ieee})
@cindex H8/300 floating point (@sc{ieee})
The H8/300 family has no hardware floating point, but the @code{.float}
directive generates @sc{ieee} floating-point numbers for compatibility
with other development tools.
@node H8/300 Directives
@section H8/300 Machine Directives
@cindex H8/300 machine directives (none)
@cindex machine directives, H8/300 (none)
@cindex @code{word} directive, H8/300
@cindex @code{int} directive, H8/300
@code{@value{AS}} has the following machine-dependent directives for
the H8/300:
@table @code
@cindex H8/300H, assembling for
@item .h8300h
Recognize and emit additional instructions for the H8/300H variant, and
also make @code{.int} emit 32-bit numbers rather than the usual (16-bit)
for the H8/300 family.
@item .h8300s
Recognize and emit additional instructions for the H8S variant, and
also make @code{.int} emit 32-bit numbers rather than the usual (16-bit)
for the H8/300 family.
@item .h8300hn
Recognize and emit additional instructions for the H8/300H variant in
normal mode, and also make @code{.int} emit 32-bit numbers rather than
the usual (16-bit) for the H8/300 family.
@item .h8300sn
Recognize and emit additional instructions for the H8S variant in
normal mode, and also make @code{.int} emit 32-bit numbers rather than
the usual (16-bit) for the H8/300 family.
@end table
On the H8/300 family (including the H8/300H) @samp{.word} directives
generate 16-bit numbers.
@node H8/300 Opcodes
@section Opcodes
@cindex H8/300 opcode summary
@cindex opcode summary, H8/300
@cindex mnemonics, H8/300
@cindex instruction summary, H8/300
For detailed information on the H8/300 machine instruction set, see
@cite{H8/300 Series Programming Manual}. For information specific to
the H8/300H, see @cite{H8/300H Series Programming Manual} (Renesas).
@code{@value{AS}} implements all the standard H8/300 opcodes. No additional
pseudo-instructions are needed on this family.
@ifset SMALL
@c this table, due to the multi-col faking and hardcoded order, looks silly
@c except in smallbook. See comments below "@set SMALL" near top of this file.
The following table summarizes the H8/300 opcodes, and their arguments.
Entries marked @samp{*} are opcodes used only on the H8/300H.
@c Using @group seems to use the normal baselineskip, not the smallexample
@c baselineskip; looks approx doublespaced.
Rs @r{source register}
Rd @r{destination register}
abs @r{absolute address}
imm @r{immediate data}
disp:N @r{N-bit displacement from a register}
pcrel:N @r{N-bit displacement relative to program counter}
add.b #imm,rd * andc #imm,ccr
add.b rs,rd band #imm,rd
add.w rs,rd band #imm,@@rd
* add.w #imm,rd band #imm,@@abs:8
* add.l rs,rd bra pcrel:8
* add.l #imm,rd * bra pcrel:16
adds #imm,rd bt pcrel:8
addx #imm,rd * bt pcrel:16
addx rs,rd brn pcrel:8
and.b #imm,rd * brn pcrel:16
and.b rs,rd bf pcrel:8
* and.w rs,rd * bf pcrel:16
* and.w #imm,rd bhi pcrel:8
* and.l #imm,rd * bhi pcrel:16
* and.l rs,rd bls pcrel:8
* bls pcrel:16 bld #imm,rd
bcc pcrel:8 bld #imm,@@rd
* bcc pcrel:16 bld #imm,@@abs:8
bhs pcrel:8 bnot #imm,rd
* bhs pcrel:16 bnot #imm,@@rd
bcs pcrel:8 bnot #imm,@@abs:8
* bcs pcrel:16 bnot rs,rd
blo pcrel:8 bnot rs,@@rd
* blo pcrel:16 bnot rs,@@abs:8
bne pcrel:8 bor #imm,rd
* bne pcrel:16 bor #imm,@@rd
beq pcrel:8 bor #imm,@@abs:8
* beq pcrel:16 bset #imm,rd
bvc pcrel:8 bset #imm,@@rd
* bvc pcrel:16 bset #imm,@@abs:8
bvs pcrel:8 bset rs,rd
* bvs pcrel:16 bset rs,@@rd
bpl pcrel:8 bset rs,@@abs:8
* bpl pcrel:16 bsr pcrel:8
bmi pcrel:8 bsr pcrel:16
* bmi pcrel:16 bst #imm,rd
bge pcrel:8 bst #imm,@@rd
* bge pcrel:16 bst #imm,@@abs:8
blt pcrel:8 btst #imm,rd
* blt pcrel:16 btst #imm,@@rd
bgt pcrel:8 btst #imm,@@abs:8
* bgt pcrel:16 btst rs,rd
ble pcrel:8 btst rs,@@rd
* ble pcrel:16 btst rs,@@abs:8
bclr #imm,rd bxor #imm,rd
bclr #imm,@@rd bxor #imm,@@rd
bclr #imm,@@abs:8 bxor #imm,@@abs:8
bclr rs,rd cmp.b #imm,rd
bclr rs,@@rd cmp.b rs,rd
bclr rs,@@abs:8 cmp.w rs,rd
biand #imm,rd cmp.w rs,rd
biand #imm,@@rd * cmp.w #imm,rd
biand #imm,@@abs:8 * cmp.l #imm,rd
bild #imm,rd * cmp.l rs,rd
bild #imm,@@rd daa rs
bild #imm,@@abs:8 das rs
bior #imm,rd dec.b rs
bior #imm,@@rd * dec.w #imm,rd
bior #imm,@@abs:8 * dec.l #imm,rd
bist #imm,rd divxu.b rs,rd
bist #imm,@@rd * divxu.w rs,rd
bist #imm,@@abs:8 * divxs.b rs,rd
bixor #imm,rd * divxs.w rs,rd
bixor #imm,@@rd eepmov
bixor #imm,@@abs:8 * eepmovw
* exts.w rd mov.w rs,@@abs:16
* exts.l rd * mov.l #imm,rd
* extu.w rd * mov.l rs,rd
* extu.l rd * mov.l @@rs,rd
inc rs * mov.l @@(disp:16,rs),rd
* inc.w #imm,rd * mov.l @@(disp:24,rs),rd
* inc.l #imm,rd * mov.l @@rs+,rd
jmp @@rs * mov.l @@abs:16,rd
jmp abs * mov.l @@abs:24,rd
jmp @@@@abs:8 * mov.l rs,@@rd
jsr @@rs * mov.l rs,@@(disp:16,rd)
jsr abs * mov.l rs,@@(disp:24,rd)
jsr @@@@abs:8 * mov.l rs,@@-rd
ldc #imm,ccr * mov.l rs,@@abs:16
ldc rs,ccr * mov.l rs,@@abs:24
* ldc @@abs:16,ccr movfpe @@abs:16,rd
* ldc @@abs:24,ccr movtpe rs,@@abs:16
* ldc @@(disp:16,rs),ccr mulxu.b rs,rd
* ldc @@(disp:24,rs),ccr * mulxu.w rs,rd
* ldc @@rs+,ccr * mulxs.b rs,rd
* ldc @@rs,ccr * mulxs.w rs,rd
* mov.b @@(disp:24,rs),rd neg.b rs
* mov.b rs,@@(disp:24,rd) * neg.w rs
mov.b @@abs:16,rd * neg.l rs
mov.b rs,rd nop
mov.b @@abs:8,rd not.b rs
mov.b rs,@@abs:8 * not.w rs
mov.b rs,rd * not.l rs
mov.b #imm,rd or.b #imm,rd
mov.b @@rs,rd or.b rs,rd
mov.b @@(disp:16,rs),rd * or.w #imm,rd
mov.b @@rs+,rd * or.w rs,rd
mov.b @@abs:8,rd * or.l #imm,rd
mov.b rs,@@rd * or.l rs,rd
mov.b rs,@@(disp:16,rd) orc #imm,ccr
mov.b rs,@@-rd pop.w rs
mov.b rs,@@abs:8 * pop.l rs
mov.w rs,@@rd push.w rs
* mov.w @@(disp:24,rs),rd * push.l rs
* mov.w rs,@@(disp:24,rd) rotl.b rs
* mov.w @@abs:24,rd * rotl.w rs
* mov.w rs,@@abs:24 * rotl.l rs
mov.w rs,rd rotr.b rs
mov.w #imm,rd * rotr.w rs
mov.w @@rs,rd * rotr.l rs
mov.w @@(disp:16,rs),rd rotxl.b rs
mov.w @@rs+,rd * rotxl.w rs
mov.w @@abs:16,rd * rotxl.l rs
mov.w rs,@@(disp:16,rd) rotxr.b rs
mov.w rs,@@-rd * rotxr.w rs
* rotxr.l rs * stc ccr,@@(disp:24,rd)
bpt * stc ccr,@@-rd
rte * stc ccr,@@abs:16
rts * stc ccr,@@abs:24
shal.b rs sub.b rs,rd
* shal.w rs sub.w rs,rd
* shal.l rs * sub.w #imm,rd
shar.b rs * sub.l rs,rd
* shar.w rs * sub.l #imm,rd
* shar.l rs subs #imm,rd
shll.b rs subx #imm,rd
* shll.w rs subx rs,rd
* shll.l rs * trapa #imm
shlr.b rs xor #imm,rd
* shlr.w rs xor rs,rd
* shlr.l rs * xor.w #imm,rd
sleep * xor.w rs,rd
stc ccr,rd * xor.l #imm,rd
* stc ccr,@@rs * xor.l rs,rd
* stc ccr,@@(disp:16,rd) xorc #imm,ccr
@end smallexample
@end ifset
@cindex size suffixes, H8/300
@cindex H8/300 size suffixes
Four H8/300 instructions (@code{add}, @code{cmp}, @code{mov},
@code{sub}) are defined with variants using the suffixes @samp{.b},
@samp{.w}, and @samp{.l} to specify the size of a memory operand.
@code{@value{AS}} supports these suffixes, but does not require them;
since one of the operands is always a register, @code{@value{AS}} can
deduce the correct size.
For example, since @code{r0} refers to a 16-bit register,
mov r0,@@foo
@exdent is equivalent to
mov.w r0,@@foo
@end example
If you use the size suffixes, @code{@value{AS}} issues a warning when
the suffix and the register size do not match.