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Vector Packet Processing
asm_mips.h
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1 /*
2  * Copyright (c) 2015 Cisco and/or its affiliates.
3  * Licensed under the Apache License, Version 2.0 (the "License");
4  * you may not use this file except in compliance with the License.
5  * You may obtain a copy of the License at:
6  *
7  * http://www.apache.org/licenses/LICENSE-2.0
8  *
9  * Unless required by applicable law or agreed to in writing, software
10  * distributed under the License is distributed on an "AS IS" BASIS,
11  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12  * See the License for the specific language governing permissions and
13  * limitations under the License.
14  */
15 /*
16  Copyright (c) 2004 Eliot Dresselhaus
17 
18  Permission is hereby granted, free of charge, to any person obtaining
19  a copy of this software and associated documentation files (the
20  "Software"), to deal in the Software without restriction, including
21  without limitation the rights to use, copy, modify, merge, publish,
22  distribute, sublicense, and/or sell copies of the Software, and to
23  permit persons to whom the Software is furnished to do so, subject to
24  the following conditions:
25 
26  The above copyright notice and this permission notice shall be
27  included in all copies or substantial portions of the Software.
28 
29  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
30  EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
31  MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
32  NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
33  LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
34  OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
35  WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
36 */
37 
38 #ifndef included_asm_mips_h
39 #define included_asm_mips_h
40 
41 /* Encoding of MIPS instructions. */
42 /* Encoding of opcode field (op). */
43 #define mips_foreach_opcode \
44  _(SPECIAL) _(REGIMM) _(j) _(jal) _(beq) _(bne) _(blez) _(bgtz) \
45  _(addi) _(addiu) _(slti) _(sltiu) _(andi) _(ori) _(xori) _(lui) \
46  _(COP0) _(COP1) _(COP2) _(COP1X) _(beql) _(bnel) _(blezl) _(bgtzl) \
47  _(daddi) _(daddiu) _(ldl) _(ldr) _(SPECIAL2) _(jalx) _(MDMX) _(O37) \
48  _(lb) _(lh) _(lwl) _(lw) _(lbu) _(lhu) _(lwr) _(lwu) \
49  _(sb) _(sh) _(swl) _(sw) _(sdl) _(sdr) _(swr) _(cache) \
50  _(ll) _(lwc1) _(lwc2) _(pref) _(lld) _(ldc1) _(ldc2) _(ld) \
51  _(sc) _(swc1) _(swc2) _(o73) _(scd) _(sdc1) _(sdc2) _(sd)
52 
53 /* Encoding of funct field. */
54 #define mips_foreach_special_funct \
55  _(sll) _(MOVCI) _(srl) _(sra) _(sllv) _(o05) _(srlv) _(srav) \
56  _(jr) _(jalr) _(movz) _(movn) _(syscall) _(break) _(o16) _(sync) \
57  _(mfhi) _(mthi) _(mflo) _(mtlo) _(dsllv) _(o25) _(dsrlv) _(dsrav) \
58  _(mult) _(multu) _(div) _(divu) _(dmult) _(dmultu) _(ddiv) _(ddivu) \
59  _(add) _(addu) _(sub) _(subu) _(and) _(or) _(xor) _(nor) \
60  _(o50) _(o51) _(slt) _(sltu) _(dadd) _(daddu) _(dsub) _(dsubu) \
61  _(tge) _(tgeu) _(tlt) _(tltu) _(teq) _(o65) _(tne) _(o67) \
62  _(dsll) _(o71) _(dsrl) _(dsra) _(dsll32) _(o75) _(dsrl32) _(dsra32)
63 
64 /* SPECIAL2 encoding of funct field. */
65 #define mips_foreach_special2_funct \
66  _(madd) _(maddu) _(mul) _(o03) _(msub) _(msubu) _(o06) _(o07) \
67  _(o10) _(o11) _(o12) _(o13) _(o14) _(o15) _(o16) _(o17) \
68  _(o20) _(o21) _(o22) _(o23) _(o24) _(o25) _(o26) _(o27) \
69  _(o30) _(o31) _(o32) _(o33) _(o34) _(o35) _(o36) _(o37) \
70  _(clz) _(clo) _(o42) _(o43) _(dclz) _(dclo) _(o46) _(o47) \
71  _(o50) _(o51) _(o52) _(o53) _(o54) _(o55) _(o56) _(o57) \
72  _(o60) _(o61) _(o62) _(o63) _(o64) _(o65) _(o66) _(o67) \
73  _(o70) _(o71) _(o72) _(o73) _(o74) _(o75) _(o76) _(sdbbp)
74 
75 /* REGIMM encoding of rt field. */
76 #define mips_foreach_regimm_rt \
77  _(bltz) _(bgez) _(bltzl) _(bgezl) _(o04) _(o05) _(o06) _(o07) \
78  _(tgei) _(tgeiu) _(tltiu) _(teqi) _(o14) _(tnei) _(o16) _(o17) \
79  _(bltzal) _(bgezal) _(bltzall) _(bgezall) _(o24) _(o25) _(o26) _(o27) \
80  _(o30) _(o31) _(o32) _(o33) _(o34) _(o35) _(o36) _(o37)
81 
82 /* COP0 encoding of rs field. */
83 #define mips_foreach_cop0_rs \
84  _(mfc0) _(dmfc0) _(o02) _(o03) _(mtc0) _(dmtc0) _(o06) _(o07) \
85  _(o10) _(o11) _(o12) _(o13) _(o14) _(o15) _(o16) _(o17) \
86  _(C0) _(o21) _(o22) _(o23) _(o24) _(o25) _(o26) _(o27) \
87  _(o30) _(o31) _(o32) _(o33) _(o34) _(o35) _(o36) _(o37)
88 
89 /* COP0 encoding of funct when rs == RS_CO */
90 #define mips_foreach_cop0_funct \
91  _(o00) _(tlbr) _(tlbwi) _(o03) _(o04) _(o05) _(tlbwr) _(o07) \
92  _(tlbp) _(o11) _(o12) _(o13) _(o14) _(o15) _(o16) _(o17) \
93  _(o20) _(o21) _(o22) _(o23) _(o24) _(o25) _(o26) _(o27) \
94  _(eret) _(o31) _(o32) _(o33) _(o34) _(o35) _(o36) _(deret) \
95  _(wait) _(o41) _(o42) _(o43) _(o44) _(o45) _(o46) _(o47) \
96  _(o50) _(o51) _(o52) _(o53) _(o54) _(o55) _(o56) _(o57) \
97  _(o60) _(o61) _(o62) _(o63) _(o64) _(o65) _(o66) _(o67) \
98  _(o70) _(o71) _(o72) _(o73) _(o74) _(o75) _(o76) _(o77)
99 
100 /* COP1 encoding of rs field. */
101 #define mips_foreach_cop1_rs \
102  _(mfc1) _(dmfc1) _(cfc1) _(o03) _(mtc1) _(dmtc1) _(ctc1) _(o07) \
103  _(BC1) _(o11) _(o12) _(o13) _(o14) _(o15) _(o16) _(o17) \
104  _(S) _(D) _(o22) _(o23) _(W) _(L) _(o26) _(o27) \
105  _(o30) _(o31) _(o32) _(o33) _(o34) _(o35) _(o36) _(o37)
106 
107 /* COP1 encoding of funct for S and D */
108 #define mips_foreach_cop1_funct \
109  _(add) _(sub) _(mul) _(div) _(sqrt) _(abs) _(mov) _(neg) \
110  _(roundl) _(truncl) _(ceill) _(floorl) _(roundw) _(truncw) _(ceilw) _(floorw) \
111  _(o20) _(MOVCF) _(movz) _(movn) _(o24) _(recip) _(rsqrt) _(o27) \
112  _(o30) _(o31) _(o32) _(o33) _(o34) _(o35) _(o36) _(o37) \
113  _(cvts) _(cvtd) _(o42) _(o43) _(cvtw) _(cvtl) _(o46) _(o47) \
114  _(o50) _(o51) _(o52) _(o53) _(o54) _(o55) _(o56) _(o57) \
115  _(cf) _(cun) _(ceq) _(cueq) _(colt) _(cult) _(cole) _(cule) \
116  _(csf) _(cngle) _(cseq) _(cngl) _(clt) _(cnge) _(cle) _(cngt)
117 
118 /* COP1X encoding of funct */
119 #define mips_foreach_cop1x_funct \
120  _(lwxc1) _(ldxc1) _(o02) _(o03) _(o04) _(luxc1) _(o06) _(o07) \
121  _(swxc1) _(sdxc1) _(o12) _(o13) _(o14) _(suxc1) _(o16) _(prefx) \
122  _(o20) _(o21) _(o22) _(o23) _(o24) _(o25) _(o26) _(o27) \
123  _(o30) _(o31) _(o32) _(o33) _(o34) _(o35) _(o36) _(o37) \
124  _(madds) _(maddd) _(o42) _(o43) _(o44) _(o45) _(o46) _(o47) \
125  _(msubs) _(msubd) _(o52) _(o53) _(o54) _(o55) _(o56) _(o57) \
126  _(nmadds) _(nmaddd) _(o62) _(o63) _(o64) _(o65) _(o66) _(o67) \
127  _(nmsubs) _(nmsubd) _(o72) _(o73) _(o74) _(o75) _(o76) _(o77)
128 
129 #define mips_foreach_mdmx_funct \
130  _(msgn) _(ceq) _(pickf) _(pickt) _(clt) _(cle) _(min) _(max) \
131  _(o10) _(o11) _(sub) _(add) _(and) _(xor) _(or) _(nor) \
132  _(sll) _(o21) _(srl) _(sra) _(o24) _(o25) _(o26) _(o27) \
133  _(alniob) _(alnvob) _(alniqh) _(alnvqh) _(o34) _(o35) _(o36) _(shfl) \
134  _(rzu) _(rnau) _(rneu) _(o43) _(rzs) _(rnas) _(rnes) _(o47) \
135  _(o50) _(o51) _(o52) _(o53) _(o54) _(o55) _(o56) _(o57) \
136  _(mul) _(o61) _(muls) _(mula) _(o64) _(o65) _(suba) _(adda) \
137  _(o70) _(o71) _(o72) _(o73) _(o74) _(o75) _(wac) _(rac)
138 
139 #define _(f) MIPS_OPCODE_##f,
140 typedef enum
141 {
144 #undef _
145 
146 #define _(f) MIPS_SPECIAL_FUNCT_##f,
147 typedef enum
148 {
151 #undef _
152 
153 #define _(f) MIPS_SPECIAL2_FUNCT_##f,
154 typedef enum
155 {
158 #undef _
159 
160 #define _(f) MIPS_REGIMM_RT_##f,
161 typedef enum
162 {
165 #undef _
166 
167 #define _(f) MIPS_COP0_RS_##f,
168 typedef enum
169 {
172 #undef _
173 
174 #define _(f) MIPS_COP0_FUNCT_##f,
175 typedef enum
176 {
179 #undef _
180 
181 #define _(f) MIPS_COP1_RS_##f,
182 typedef enum
183 {
186 #undef _
187 
188 #define _(f) MIPS_COP1_FUNCT_##f,
189 typedef enum
190 {
193 #undef _
194 
195 #define _(f) MIPS_COP1X_FUNCT_##f,
196 typedef enum
197 {
200 #undef _
201 
202 #define _(f) MIPS_MDMX_FUNCT_##f,
203 typedef enum
204 {
207 #undef _
208 
211 {
212  return (insn >> 26) & 0x3f;
213 }
214 
217 {
218  return (insn >> 21) & 0x1f;
219 }
220 
223 {
224  return (insn >> 16) & 0x1f;
225 }
226 
229 {
230  return (insn >> 11) & 0x1f;
231 }
232 
235 {
236  return (insn >> 6) & 0x1f;
237 }
238 
241 {
242  return (insn >> 0) & 0x3f;
243 }
244 
247 {
248  return (((i32) insn) << 16) >> 16;
249 }
250 
252 mips_insn_encode_i_type (int op, int rs, int rt, int immediate)
253 {
254  u32 insn;
255  insn = immediate;
256  insn |= rt << 16;
257  insn |= rs << 21;
258  insn |= op << 26;
259 
260  ASSERT (mips_insn_get_immediate (insn) == immediate);
261  ASSERT (mips_insn_get_rt (insn) == rt);
262  ASSERT (mips_insn_get_rs (insn) == rt);
263  ASSERT (mips_insn_get_op (insn) == op);
264 
265  return insn;
266 }
267 
270 {
271  u32 insn;
272 
273  insn = (addr & ((1 << 28) - 1)) / 4;
274  insn |= op << 26;
275 
276  return insn;
277 }
278 
280 mips_insn_encode_r_type (int op, int rs, int rt, int rd, int sa, int funct)
281 {
282  u32 insn;
283  insn = funct;
284  insn |= sa << 6;
285  insn |= rd << 11;
286  insn |= rt << 16;
287  insn |= rs << 21;
288  insn |= op << 26;
289 
290  ASSERT (mips_insn_get_funct (insn) == funct);
291  ASSERT (mips_insn_get_sa (insn) == sa);
292  ASSERT (mips_insn_get_rd (insn) == rd);
293  ASSERT (mips_insn_get_rt (insn) == rt);
294  ASSERT (mips_insn_get_rs (insn) == rt);
295  ASSERT (mips_insn_get_op (insn) == op);
296 
297  return insn;
298 }
299 
300 #define mips_insn_r(op,funct,rd,rs,rt,sa) \
301  mips_insn_encode_r_type (MIPS_OPCODE_##op, \
302  (rs), (rt), (rd), (sa), \
303  MIPS_##op##_FUNCT_##funct)
304 
305 #define mips_insn_i(op,rs,rt,imm) \
306  mips_insn_encode_i_type (MIPS_OPCODE_##op, (rs), (rt), (imm))
307 
308 #define mips_insn_j(op,target) \
309  mips_insn_encode_i_type (MIPS_OPCODE_##op, (rs), (rt), (imm))
310 
311 /* Generate unsigned load instructions of data of various sizes. */
313 mips_insn_load (u32 rd, i32 offset, u32 base, u32 log2_bytes)
314 {
315  int op;
316 
317  ASSERT (log2_bytes < 4);
318  switch (log2_bytes)
319  {
320  case 0:
321  op = MIPS_OPCODE_lbu;
322  break;
323  case 1:
324  op = MIPS_OPCODE_lhu;
325  break;
326  case 2:
327  op = MIPS_OPCODE_lwu;
328  break;
329  case 3:
330  op = MIPS_OPCODE_ld;
331  break;
332  }
333 
334  return mips_insn_encode_i_type (op, base, rd, offset);
335 }
336 
337 typedef enum
338 {
341 } mips_reg_t;
342 
343 #endif /* included_asm_mips_h */
344 
345 /*
346  * fd.io coding-style-patch-verification: ON
347  *
348  * Local Variables:
349  * eval: (c-set-style "gnu")
350  * End:
351  */
static u32 mips_insn_encode_i_type(int op, int rs, int rt, int immediate)
Definition: asm_mips.h:252
static u32 mips_insn_get_rt(u32 insn)
Definition: asm_mips.h:222
#define mips_foreach_mdmx_funct
Definition: asm_mips.h:129
static u32 mips_insn_encode_r_type(int op, int rs, int rt, int rd, int sa, int funct)
Definition: asm_mips.h:280
mips_reg_t
Definition: asm_mips.h:337
mips_insn_opcode_t
Definition: asm_mips.h:140
vhost_vring_addr_t addr
Definition: vhost_user.h:121
#define mips_foreach_cop1_funct
Definition: asm_mips.h:108
#define always_inline
Definition: clib.h:98
#define mips_foreach_regimm_rt
Definition: asm_mips.h:76
mips_insn_special2_funct_t
Definition: asm_mips.h:154
unsigned int u32
Definition: types.h:88
#define mips_foreach_cop1_rs
Definition: asm_mips.h:101
#define mips_foreach_special2_funct
Definition: asm_mips.h:65
static u32 mips_insn_load(u32 rd, i32 offset, u32 base, u32 log2_bytes)
Definition: asm_mips.h:313
#define mips_foreach_cop1x_funct
Definition: asm_mips.h:119
static u32 mips_insn_get_funct(u32 insn)
Definition: asm_mips.h:240
static u32 mips_insn_get_sa(u32 insn)
Definition: asm_mips.h:234
#define mips_foreach_cop0_funct
Definition: asm_mips.h:90
mips_insn_cop1x_funct_t
Definition: asm_mips.h:196
#define mips_foreach_cop0_rs
Definition: asm_mips.h:83
static u32 mips_insn_get_rd(u32 insn)
Definition: asm_mips.h:228
static i32 mips_insn_get_immediate(u32 insn)
Definition: asm_mips.h:246
signed int i32
Definition: types.h:77
#define mips_foreach_opcode
Definition: asm_mips.h:43
static u32 mips_insn_get_rs(u32 insn)
Definition: asm_mips.h:216
static mips_insn_opcode_t mips_insn_get_op(u32 insn)
Definition: asm_mips.h:210
#define ASSERT(truth)
mips_insn_mdmx_funct_t
Definition: asm_mips.h:203
#define mips_foreach_special_funct
Definition: asm_mips.h:54
mips_insn_special_funct_t
Definition: asm_mips.h:147
mips_insn_regimm_rt_t
Definition: asm_mips.h:161
mips_insn_cop1_funct_t
Definition: asm_mips.h:189
template key/value backing page structure
Definition: bihash_doc.h:44
mips_insn_cop1_rs_t
Definition: asm_mips.h:182
mips_insn_cop0_rs_t
Definition: asm_mips.h:168
mips_insn_cop0_funct_t
Definition: asm_mips.h:175
static u32 mips_insn_encode_j_type(int op, u32 addr)
Definition: asm_mips.h:269