1 /***************************** alpha/ngen.h ************************************
3 Copyright (c) 1997 A. Krall, R. Grafl, M. Gschwind, M. Probst
5 See file COPYRIGHT for information on usage and disclaimer of warranties
7 Contains the machine dependent code generator definitions and macros for an
10 Authors: Andreas Krall EMAIL: cacao@complang.tuwien.ac.at
11 Reinhard Grafl EMAIL: cacao@complang.tuwien.ac.at
13 Last Change: 1998/08/10
15 *******************************************************************************/
17 /************************ Preallocated registers ******************************/
19 /* integer registers */
21 #define REG_RESULT 0 /* to deliver method results */
22 #define REG_EXCEPTION 1 /* to throw an exception across method bounds */
24 #define REG_RA 26 /* return address */
25 #define REG_PV 27 /* procedure vector, must be provided by caller */
26 #define REG_METHODPTR 28 /* pointer to the place from where the procedure */
27 /* vector has been fetched */
28 #define REG_ITMP1 25 /* temporary register */
29 #define REG_ITMP2 28 /* temporary register */
30 #define REG_ITMP3 29 /* temporary register */
32 #define REG_ITMP1_XPTR 25 /* exception pointer = temporary register 1 */
33 #define REG_ITMP2_XPC 28 /* exception pc = temporary register 2 */
35 #define REG_SP 30 /* stack pointer */
36 #define REG_ZERO 31 /* allways zero */
38 /* floating point registers */
40 #define REG_FRESULT 0 /* to deliver floating point method results */
41 #define REG_FTMP1 28 /* temporary floating point register */
42 #define REG_FTMP2 29 /* temporary floating point register */
43 #define REG_FTMP3 30 /* temporary floating point register */
45 #define REG_IFTMP 28 /* temporary integer and floating point register */
47 /******************** register descripton - array *****************************/
49 /* #define REG_RES 0 reserved register for OS or code generator */
50 /* #define REG_RET 1 return value register */
51 /* #define REG_EXC 2 exception value register */
52 /* #define REG_SAV 3 (callee) saved register */
53 /* #define REG_TMP 4 scratch temporary register (caller saved) */
54 /* #define REG_ARG 5 argument register (caller saved) */
56 /* #define REG_END -1 last entry in tables */
59 REG_RET, REG_TMP, REG_TMP, REG_TMP, REG_TMP, REG_TMP, REG_TMP, REG_TMP,
60 REG_TMP, REG_SAV, REG_SAV, REG_SAV, REG_SAV, REG_SAV, REG_SAV, REG_SAV,
61 REG_ARG, REG_ARG, REG_ARG, REG_ARG, REG_ARG, REG_ARG, REG_TMP, REG_TMP,
62 REG_TMP, REG_RES, REG_RES, REG_RES, REG_RES, REG_RES, REG_RES, REG_RES,
65 #define INT_SAV_CNT 7 /* number of int callee saved registers */
66 #define INT_ARG_CNT 6 /* number of int argument registers */
68 /* for use of reserved registers, see comment above */
70 int nregdescfloat[] = {
71 REG_RET, REG_TMP, REG_SAV, REG_SAV, REG_SAV, REG_SAV, REG_SAV, REG_SAV,
72 REG_SAV, REG_SAV, REG_TMP, REG_TMP, REG_TMP, REG_TMP, REG_TMP, REG_TMP,
73 REG_ARG, REG_ARG, REG_ARG, REG_ARG, REG_ARG, REG_ARG, REG_TMP, REG_TMP,
74 REG_TMP, REG_TMP, REG_TMP, REG_TMP, REG_RES, REG_RES, REG_RES, REG_RES,
77 #define FLT_SAV_CNT 8 /* number of flt callee saved registers */
78 #define FLT_ARG_CNT 6 /* number of flt argument registers */
80 /* for use of reserved registers, see comment above */
83 /*** parameter allocation mode ***/
85 int nreg_parammode = PARAMMODE_NUMBERED;
87 /* parameter-registers will be allocated by assigning the
88 1. parameter: int/float-reg 16
89 2. parameter: int/float-reg 17
90 3. parameter: int/float-reg 18 ....
94 /************************** stackframe-infos **********************************/
96 int parentargs_base; /* offset in stackframe for the parameter from the caller*/
98 /* -> see file 'calling.doc' */
101 /******************** macros to create code ***********************************/
103 /* 3-address-operations: M_OP3
105 fu ..... function-number
106 a ..... register number source 1
107 b ..... register number or constant integer source 2
108 c ..... register number destination
109 const .. switch to use b as constant integer
110 (0 means: use b as register number)
111 (1 means: use b as constant 8-bit-integer)
113 #define M_OP3(op,fu,a,b,c,const) \
114 *(mcodeptr++) = ( (((s4)(op))<<26)|((a)<<21)|((b)<<(16-3*(const)))| \
115 ((const)<<12)|((fu)<<5)|((c)) )
117 /* 3-address-floating-point-operation: M_FOP3
119 fu .... function-number
120 a,b ... source floating-point registers
121 c ..... destination register
123 #define M_FOP3(op,fu,a,b,c) \
124 *(mcodeptr++) = ( (((s4)(op))<<26)|((a)<<21)|((b)<<16)|((fu)<<5)|(c) )
126 /* branch instructions: M_BRA
128 a ...... register to be tested
129 disp ... relative address to be jumped to (divided by 4)
131 #define M_BRA(op,a,disp) \
132 *(mcodeptr++) = ( (((s4)(op))<<26)|((a)<<21)|((disp)&0x1fffff) )
135 /* memory operations: M_MEM
137 a ...... source/target register for memory access
138 b ...... base register
139 disp ... displacement (16 bit signed) to be added to b
141 #define M_MEM(op,a,b,disp) \
142 *(mcodeptr++) = ( (((s4)(op))<<26)|((a)<<21)|((b)<<16)|((disp)&0xffff) )
145 /***** macros for all used commands (see an Alpha-manual for description) *****/
147 #define M_LDA(a,b,disp) M_MEM (0x08,a,b,disp) /* low const */
148 #define M_LDAH(a,b,disp) M_MEM (0x09,a,b,disp) /* high const */
149 #define M_BLDU(a,b,disp) M_MEM (0x0a,a,b,disp) /* 8 load */
150 #define M_SLDU(a,b,disp) M_MEM (0x0c,a,b,disp) /* 16 load */
151 #define M_ILD(a,b,disp) M_MEM (0x28,a,b,disp) /* 32 load */
152 #define M_LLD(a,b,disp) M_MEM (0x29,a,b,disp) /* 64 load */
153 #define M_BST(a,b,disp) M_MEM (0x0e,a,b,disp) /* 8 store */
154 #define M_SST(a,b,disp) M_MEM (0x0d,a,b,disp) /* 16 store */
155 #define M_IST(a,b,disp) M_MEM (0x2c,a,b,disp) /* 32 store */
156 #define M_LST(a,b,disp) M_MEM (0x2d,a,b,disp) /* 64 store */
158 #define M_BSEXT(b,c) M_OP3 (0x1c,0x0,REG_ZERO,b,c,0) /* 8 signext */
159 #define M_SSEXT(b,c) M_OP3 (0x1c,0x1,REG_ZERO,b,c,0) /* 16 signext */
161 #define M_BR(disp) M_BRA (0x30,REG_ZERO,disp) /* branch */
162 #define M_BSR(ra,disp) M_BRA (0x34,ra,disp) /* branch sbr */
163 #define M_BEQZ(a,disp) M_BRA (0x39,a,disp) /* br a == 0 */
164 #define M_BLTZ(a,disp) M_BRA (0x3a,a,disp) /* br a < 0 */
165 #define M_BLEZ(a,disp) M_BRA (0x3b,a,disp) /* br a <= 0 */
166 #define M_BNEZ(a,disp) M_BRA (0x3d,a,disp) /* br a != 0 */
167 #define M_BGEZ(a,disp) M_BRA (0x3e,a,disp) /* br a >= 0 */
168 #define M_BGTZ(a,disp) M_BRA (0x3f,a,disp) /* br a > 0 */
170 #define M_JMP(a,b) M_MEM (0x1a,a,b,0x0000) /* jump */
171 #define M_JSR(a,b) M_MEM (0x1a,a,b,0x4000) /* call sbr */
172 #define M_RET(a,b) M_MEM (0x1a,a,b,0x8000) /* return */
174 #define M_IADD(a,b,c,const) M_OP3 (0x10,0x0, a,b,c,const) /* 32 add */
175 #define M_LADD(a,b,c,const) M_OP3 (0x10,0x20, a,b,c,const) /* 64 add */
176 #define M_ISUB(a,b,c,const) M_OP3 (0x10,0x09, a,b,c,const) /* 32 sub */
177 #define M_LSUB(a,b,c,const) M_OP3 (0x10,0x29, a,b,c,const) /* 64 sub */
178 #define M_IMUL(a,b,c,const) M_OP3 (0x13,0x00, a,b,c,const) /* 32 mul */
179 #define M_LMUL(a,b,c,const) M_OP3 (0x13,0x20, a,b,c,const) /* 64 mul */
181 #define M_CMPEQ(a,b,c,const) M_OP3 (0x10,0x2d, a,b,c,const) /* c = a == b */
182 #define M_CMPLT(a,b,c,const) M_OP3 (0x10,0x4d, a,b,c,const) /* c = a < b */
183 #define M_CMPLE(a,b,c,const) M_OP3 (0x10,0x6d, a,b,c,const) /* c = a <= b */
185 #define M_CMPULE(a,b,c,const) M_OP3 (0x10,0x3d, a,b,c,const) /* c = a <= b */
186 #define M_CMPULT(a,b,c,const) M_OP3 (0x10,0x1d, a,b,c,const) /* c = a <= b */
188 #define M_AND(a,b,c,const) M_OP3 (0x11,0x00, a,b,c,const) /* c = a & b */
189 #define M_OR(a,b,c,const) M_OP3 (0x11,0x20, a,b,c,const) /* c = a | b */
190 #define M_XOR(a,b,c,const) M_OP3 (0x11,0x40, a,b,c,const) /* c = a ^ b */
192 #define M_NOP M_OR (31,31,31,0)
194 #define M_SLL(a,b,c,const) M_OP3 (0x12,0x39, a,b,c,const) /* c = a << b */
195 #define M_SRA(a,b,c,const) M_OP3 (0x12,0x3c, a,b,c,const) /* c = a >> b */
196 #define M_SRL(a,b,c,const) M_OP3 (0x12,0x34, a,b,c,const) /* c = a >>>b */
198 #define M_FLD(a,b,disp) M_MEM (0x22,a,b,disp) /* load flt */
199 #define M_DLD(a,b,disp) M_MEM (0x23,a,b,disp) /* load dbl */
200 #define M_FST(a,b,disp) M_MEM (0x26,a,b,disp) /* store flt */
201 #define M_DST(a,b,disp) M_MEM (0x27,a,b,disp) /* store dbl */
203 #define M_FADD(a,b,c) M_FOP3 (0x16, 0x080, a,b,c) /* flt add */
204 #define M_DADD(a,b,c) M_FOP3 (0x16, 0x0a0, a,b,c) /* dbl add */
205 #define M_FSUB(a,b,c) M_FOP3 (0x16, 0x081, a,b,c) /* flt sub */
206 #define M_DSUB(a,b,c) M_FOP3 (0x16, 0x0a1, a,b,c) /* dbl sub */
207 #define M_FMUL(a,b,c) M_FOP3 (0x16, 0x082, a,b,c) /* flt mul */
208 #define M_DMUL(a,b,c) M_FOP3 (0x16, 0x0a2, a,b,c) /* dbl mul */
209 #define M_FDIV(a,b,c) M_FOP3 (0x16, 0x083, a,b,c) /* flt div */
210 #define M_DDIV(a,b,c) M_FOP3 (0x16, 0x0a3, a,b,c) /* dbl div */
212 #define M_FADDS(a,b,c) M_FOP3 (0x16, 0x580, a,b,c) /* flt add */
213 #define M_DADDS(a,b,c) M_FOP3 (0x16, 0x5a0, a,b,c) /* dbl add */
214 #define M_FSUBS(a,b,c) M_FOP3 (0x16, 0x581, a,b,c) /* flt sub */
215 #define M_DSUBS(a,b,c) M_FOP3 (0x16, 0x5a1, a,b,c) /* dbl sub */
216 #define M_FMULS(a,b,c) M_FOP3 (0x16, 0x582, a,b,c) /* flt mul */
217 #define M_DMULS(a,b,c) M_FOP3 (0x16, 0x5a2, a,b,c) /* dbl mul */
218 #define M_FDIVS(a,b,c) M_FOP3 (0x16, 0x583, a,b,c) /* flt div */
219 #define M_DDIVS(a,b,c) M_FOP3 (0x16, 0x5a3, a,b,c) /* dbl div */
221 #define M_CVTDF(a,b,c) M_FOP3 (0x16, 0x0ac, a,b,c) /* dbl2long */
222 #define M_CVTLF(a,b,c) M_FOP3 (0x16, 0x0bc, a,b,c) /* long2flt */
223 #define M_CVTLD(a,b,c) M_FOP3 (0x16, 0x0be, a,b,c) /* long2dbl */
224 #define M_CVTDL(a,b,c) M_FOP3 (0x16, 0x1af, a,b,c) /* dbl2long */
225 #define M_CVTDL_C(a,b,c) M_FOP3 (0x16, 0x12f, a,b,c) /* dbl2long */
226 #define M_CVTLI(a,b) M_FOP3 (0x17, 0x130, 31,a,b) /* long2int */
228 #define M_CVTDFS(a,b,c) M_FOP3 (0x16, 0x5ac, a,b,c) /* dbl2long */
229 #define M_CVTDLS(a,b,c) M_FOP3 (0x16, 0x5af, a,b,c) /* dbl2long */
230 #define M_CVTDL_CS(a,b,c) M_FOP3 (0x16, 0x52f, a,b,c) /* dbl2long */
231 #define M_CVTLIS(a,b) M_FOP3 (0x17, 0x530, 31,a,b) /* long2int */
233 #define M_FCMPEQ(a,b,c) M_FOP3 (0x16, 0x0a5, a,b,c) /* c = a==b */
234 #define M_FCMPLT(a,b,c) M_FOP3 (0x16, 0x0a6, a,b,c) /* c = a<b */
236 #define M_FCMPEQS(a,b,c) M_FOP3 (0x16, 0x5a5, a,b,c) /* c = a==b */
237 #define M_FCMPLTS(a,b,c) M_FOP3 (0x16, 0x5a6, a,b,c) /* c = a<b */
239 #define M_FMOV(fa,fb) M_FOP3 (0x17, 0x020, fa,fa,fb) /* b = a */
240 #define M_FMOVN(fa,fb) M_FOP3 (0x17, 0x021, fa,fa,fb) /* b = -a */
242 #define M_FNOP M_FMOV (31,31)
244 #define M_FBEQZ(fa,disp) M_BRA (0x31,fa,disp) /* br a == 0.0*/
246 /****** macros for special commands (see an Alpha-manual for description) *****/
248 #define M_TRAPB M_MEM (0x18,0,0,0x0000) /* trap barrier*/
250 #define M_S4ADDL(a,b,c,const) M_OP3 (0x10,0x02, a,b,c,const) /* c = a*4 + b */
251 #define M_S4ADDQ(a,b,c,const) M_OP3 (0x10,0x22, a,b,c,const) /* c = a*4 + b */
252 #define M_S4SUBL(a,b,c,const) M_OP3 (0x10,0x0b, a,b,c,const) /* c = a*4 - b */
253 #define M_S4SUBQ(a,b,c,const) M_OP3 (0x10,0x2b, a,b,c,const) /* c = a*4 - b */
254 #define M_S8ADDL(a,b,c,const) M_OP3 (0x10,0x12, a,b,c,const) /* c = a*8 + b */
255 #define M_S8ADDQ(a,b,c,const) M_OP3 (0x10,0x32, a,b,c,const) /* c = a*8 + b */
256 #define M_S8SUBL(a,b,c,const) M_OP3 (0x10,0x1b, a,b,c,const) /* c = a*8 - b */
257 #define M_S8SUBQ(a,b,c,const) M_OP3 (0x10,0x3b, a,b,c,const) /* c = a*8 - b */
259 #define M_LLD_U(a,b,disp) M_MEM (0x0b,a,b,disp) /* unalign ld */
260 #define M_LST_U(a,b,disp) M_MEM (0x0f,a,b,disp) /* unalign st */
262 #define M_ZAP(a,b,c,const) M_OP3 (0x12,0x30, a,b,c,const)
263 #define M_ZAPNOT(a,b,c,const) M_OP3 (0x12,0x31, a,b,c,const)
264 #define M_EXTBL(a,b,c,const) M_OP3 (0x12,0x06, a,b,c,const)
265 #define M_EXTWL(a,b,c,const) M_OP3 (0x12,0x16, a,b,c,const)
266 #define M_EXTLL(a,b,c,const) M_OP3 (0x12,0x26, a,b,c,const)
267 #define M_EXTQL(a,b,c,const) M_OP3 (0x12,0x36, a,b,c,const)
268 #define M_EXTWH(a,b,c,const) M_OP3 (0x12,0x5a, a,b,c,const)
269 #define M_EXTLH(a,b,c,const) M_OP3 (0x12,0x6a, a,b,c,const)
270 #define M_EXTQH(a,b,c,const) M_OP3 (0x12,0x7a, a,b,c,const)
271 #define M_INSBL(a,b,c,const) M_OP3 (0x12,0x0b, a,b,c,const)
272 #define M_INSWL(a,b,c,const) M_OP3 (0x12,0x1b, a,b,c,const)
273 #define M_INSLL(a,b,c,const) M_OP3 (0x12,0x2b, a,b,c,const)
274 #define M_INSQL(a,b,c,const) M_OP3 (0x12,0x3b, a,b,c,const)
275 #define M_INSWH(a,b,c,const) M_OP3 (0x12,0x57, a,b,c,const)
276 #define M_INSLH(a,b,c,const) M_OP3 (0x12,0x67, a,b,c,const)
277 #define M_INSQH(a,b,c,const) M_OP3 (0x12,0x77, a,b,c,const)
278 #define M_MSKBL(a,b,c,const) M_OP3 (0x12,0x02, a,b,c,const)
279 #define M_MSKWL(a,b,c,const) M_OP3 (0x12,0x12, a,b,c,const)
280 #define M_MSKLL(a,b,c,const) M_OP3 (0x12,0x22, a,b,c,const)
281 #define M_MSKQL(a,b,c,const) M_OP3 (0x12,0x32, a,b,c,const)
282 #define M_MSKWH(a,b,c,const) M_OP3 (0x12,0x52, a,b,c,const)
283 #define M_MSKLH(a,b,c,const) M_OP3 (0x12,0x62, a,b,c,const)
284 #define M_MSKQH(a,b,c,const) M_OP3 (0x12,0x72, a,b,c,const)
287 /****** macros for unused commands (see an Alpha-manual for description) ******/
289 #define M_ANDNOT(a,b,c,const) M_OP3 (0x11,0x08, a,b,c,const) /* c = a &~ b */
290 #define M_ORNOT(a,b,c,const) M_OP3 (0x11,0x28, a,b,c,const) /* c = a |~ b */
291 #define M_XORNOT(a,b,c,const) M_OP3 (0x11,0x48, a,b,c,const) /* c = a ^~ b */
293 #define M_CMOVEQ(a,b,c,const) M_OP3 (0x11,0x24, a,b,c,const) /* a==0 ? c=b */
294 #define M_CMOVNE(a,b,c,const) M_OP3 (0x11,0x26, a,b,c,const) /* a!=0 ? c=b */
295 #define M_CMOVLT(a,b,c,const) M_OP3 (0x11,0x44, a,b,c,const) /* a< 0 ? c=b */
296 #define M_CMOVGE(a,b,c,const) M_OP3 (0x11,0x46, a,b,c,const) /* a>=0 ? c=b */
297 #define M_CMOVLE(a,b,c,const) M_OP3 (0x11,0x64, a,b,c,const) /* a<=0 ? c=b */
298 #define M_CMOVGT(a,b,c,const) M_OP3 (0x11,0x66, a,b,c,const) /* a> 0 ? c=b */
300 #define M_CMPBGE(a,b,c,const) M_OP3 (0x10,0x0f, a,b,c,const)
302 #define M_FCMPUN(a,b,c) M_FOP3 (0x16, 0x0a4, a,b,c) /* unordered */
303 #define M_FCMPLE(a,b,c) M_FOP3 (0x16, 0x0a7, a,b,c) /* c = a<=b */
305 #define M_FCMPUNS(a,b,c) M_FOP3 (0x16, 0x5a4, a,b,c) /* unordered */
306 #define M_FCMPLES(a,b,c) M_FOP3 (0x16, 0x5a7, a,b,c) /* c = a<=b */
308 #define M_FBNEZ(fa,disp) M_BRA (0x35,fa,disp)
309 #define M_FBLEZ(fa,disp) M_BRA (0x33,fa,disp)
311 #define M_JMP_CO(a,b) M_MEM (0x1a,a,b,0xc000) /* call cosub */
314 /************************ function gen_resolvebranch ***************************
316 backpatches a branch instruction; Alpha branch instructions are very
317 regular, so it is only necessary to overwrite some fixed bits in the
320 parameters: ip ... pointer to instruction after branch (void*)
321 so ... offset of instruction after branch (s4)
322 to ... offset of branch target (s4)
324 *******************************************************************************/
326 #define gen_resolvebranch(ip,so,to) ((s4*)(ip))[-1]|=((s4)(to)-(so))>>2&0x1fffff
328 #define SOFTNULLPTRCHECK