1 @c Copyright (C) 1991, 92, 93, 94, 95, 1997 Free Software Foundation, Inc.
2 @c This is part of the GAS manual.
3 @c For copying conditions, see the file as.texinfo.
6 @chapter Hitachi SH Dependent Features
10 * SH Options:: Options
12 * SH Floating Point:: Floating Point
13 * SH Directives:: SH Machine Directives
14 * SH Opcodes:: Opcodes
20 @cindex SH options (none)
21 @cindex options, SH (none)
22 @code{@value{AS}} has no additional command-line options for the Hitachi
29 * SH-Chars:: Special Characters
30 * SH-Regs:: Register Names
31 * SH-Addressing:: Addressing Modes
35 @subsection Special Characters
37 @cindex line comment character, SH
38 @cindex SH line comment character
39 @samp{!} is the line comment character.
41 @cindex line separator, SH
42 @cindex statement separator, SH
43 @cindex SH line separator
44 You can use @samp{;} instead of a newline to separate statements.
46 @cindex symbol names, @samp{$} in
47 @cindex @code{$} in symbol names
48 Since @samp{$} has no special meaning, you may use it in symbol names.
51 @subsection Register Names
55 You can use the predefined symbols @samp{r0}, @samp{r1}, @samp{r2},
56 @samp{r3}, @samp{r4}, @samp{r5}, @samp{r6}, @samp{r7}, @samp{r8},
57 @samp{r9}, @samp{r10}, @samp{r11}, @samp{r12}, @samp{r13}, @samp{r14},
58 and @samp{r15} to refer to the SH registers.
60 The SH also has these control registers:
64 procedure register (holds return address)
71 high and low multiply accumulator registers
80 vector base register (for interrupt vectors)
84 @subsection Addressing Modes
86 @cindex addressing modes, SH
87 @cindex SH addressing modes
88 @code{@value{AS}} understands the following addressing modes for the SH.
89 @code{R@var{n}} in the following refers to any of the numbered
90 registers, but @emph{not} the control registers.
100 Register indirect with pre-decrement
103 Register indirect with post-increment
105 @item @@(@var{disp}, R@var{n})
106 Register indirect with displacement
108 @item @@(R0, R@var{n})
111 @item @@(@var{disp}, GBR)
118 @itemx @@(@var{disp}, PC)
119 PC relative address (for branch or for addressing memory). The
120 @code{@value{AS}} implementation allows you to use the simpler form
121 @var{addr} anywhere a PC relative address is called for; the alternate
122 form is supported for compatibility with other assemblers.
128 @node SH Floating Point
129 @section Floating Point
131 @cindex floating point, SH (@sc{ieee})
132 @cindex SH floating point (@sc{ieee})
133 The SH family has no hardware floating point, but the @code{.float}
134 directive generates @sc{ieee} floating-point numbers for compatibility
135 with other development tools.
138 @section SH Machine Directives
140 @cindex SH machine directives
141 @cindex machine directives, SH
142 @cindex @code{uaword} directive, SH
143 @cindex @code{ualong} directive, SH
148 @code{@value{AS}} will issue a warning when a misaligned @code{.word} or
149 @code{.long} directive is used. You may use @code{.uaword} or
150 @code{.ualong} to indicate that the value is intentionally misaligned.
156 @cindex SH opcode summary
157 @cindex opcode summary, SH
158 @cindex mnemonics, SH
159 @cindex instruction summary, SH
160 For detailed information on the SH machine instruction set, see
161 @cite{SH-Microcomputer User's Manual} (Hitachi Micro Systems, Inc.).
163 @code{@value{AS}} implements all the standard SH opcodes. No additional
164 pseudo-instructions are needed on this family. Note, however, that
165 because @code{@value{AS}} supports a simpler form of PC-relative
166 addressing, you may simply write (for example)
173 where other assemblers might require an explicit displacement to
174 @code{bar} from the program counter:
177 mov.l @@(@var{disp}, PC)
181 @c this table, due to the multi-col faking and hardcoded order, looks silly
182 @c except in smallbook. See comments below "@set SMALL" near top of this file.
184 Here is a summary of SH opcodes:
189 Rn @r{a numbered register}
190 Rm @r{another numbered register}
191 #imm @r{immediate data}
192 disp @r{displacement}
193 disp8 @r{8-bit displacement}
194 disp12 @r{12-bit displacement}
196 add #imm,Rn lds.l @@Rn+,PR
197 add Rm,Rn mac.w @@Rm+,@@Rn+
198 addc Rm,Rn mov #imm,Rn
200 and #imm,R0 mov.b Rm,@@(R0,Rn)
201 and Rm,Rn mov.b Rm,@@-Rn
202 and.b #imm,@@(R0,GBR) mov.b Rm,@@Rn
203 bf disp8 mov.b @@(disp,Rm),R0
204 bra disp12 mov.b @@(disp,GBR),R0
205 bsr disp12 mov.b @@(R0,Rm),Rn
206 bt disp8 mov.b @@Rm+,Rn
208 clrt mov.b R0,@@(disp,Rm)
209 cmp/eq #imm,R0 mov.b R0,@@(disp,GBR)
210 cmp/eq Rm,Rn mov.l Rm,@@(disp,Rn)
211 cmp/ge Rm,Rn mov.l Rm,@@(R0,Rn)
212 cmp/gt Rm,Rn mov.l Rm,@@-Rn
213 cmp/hi Rm,Rn mov.l Rm,@@Rn
214 cmp/hs Rm,Rn mov.l @@(disp,Rn),Rm
215 cmp/pl Rn mov.l @@(disp,GBR),R0
216 cmp/pz Rn mov.l @@(disp,PC),Rn
217 cmp/str Rm,Rn mov.l @@(R0,Rm),Rn
218 div0s Rm,Rn mov.l @@Rm+,Rn
220 div1 Rm,Rn mov.l R0,@@(disp,GBR)
221 exts.b Rm,Rn mov.w Rm,@@(R0,Rn)
222 exts.w Rm,Rn mov.w Rm,@@-Rn
223 extu.b Rm,Rn mov.w Rm,@@Rn
224 extu.w Rm,Rn mov.w @@(disp,Rm),R0
225 jmp @@Rn mov.w @@(disp,GBR),R0
226 jsr @@Rn mov.w @@(disp,PC),Rn
227 ldc Rn,GBR mov.w @@(R0,Rm),Rn
228 ldc Rn,SR mov.w @@Rm+,Rn
229 ldc Rn,VBR mov.w @@Rm,Rn
230 ldc.l @@Rn+,GBR mov.w R0,@@(disp,Rm)
231 ldc.l @@Rn+,SR mov.w R0,@@(disp,GBR)
232 ldc.l @@Rn+,VBR mova @@(disp,PC),R0
234 lds Rn,MACL muls Rm,Rn
236 lds.l @@Rn+,MACH neg Rm,Rn
237 lds.l @@Rn+,MACL negc Rm,Rn
240 not Rm,Rn stc.l GBR,@@-Rn
241 or #imm,R0 stc.l SR,@@-Rn
242 or Rm,Rn stc.l VBR,@@-Rn
243 or.b #imm,@@(R0,GBR) sts MACH,Rn
246 rotl Rn sts.l MACH,@@-Rn
247 rotr Rn sts.l MACL,@@-Rn
258 shlr16 Rn tst.b #imm,@@(R0,GBR)
261 sleep xor.b #imm,@@(R0,GBR)
262 stc GBR,Rn xtrct Rm,Rn