cpu/drc/emit_arm.c

   1 // Basic macros to emit ARM instructions and some utils
   2
   3 // (c) Copyright 2008-2009, Grazvydas "notaz" Ignotas
   4 // Free for non-commercial use.
   5
   6 #define CONTEXT_REG 11
   7
   8 // XXX: tcache_ptr type for SVP and SH2 compilers differs..
   9 #define EMIT_PTR(ptr, x) \
  10         do { \
  11                 *(u32 *)ptr = x; \
  12                 ptr = (void *)((u8 *)ptr + sizeof(u32)); \
  13                 COUNT_OP; \
  14         } while (0)
  15
  16 #define EMIT(x) EMIT_PTR(tcache_ptr, x)
  17
  18 #define A_R4M  (1 << 4)
  19 #define A_R5M  (1 << 5)
  20 #define A_R6M  (1 << 6)
  21 #define A_R7M  (1 << 7)
  22 #define A_R8M  (1 << 8)
  23 #define A_R9M  (1 << 9)
  24 #define A_R10M (1 << 10)
  25 #define A_R11M (1 << 11)
  26 #define A_R14M (1 << 14)
  27 #define A_R15M (1 << 15)
  28
  29 #define A_COND_AL 0xe
  30 #define A_COND_EQ 0x0
  31 #define A_COND_NE 0x1
  32 #define A_COND_HS 0x2
  33 #define A_COND_LO 0x3
  34 #define A_COND_MI 0x4
  35 #define A_COND_PL 0x5
  36 #define A_COND_VS 0x6
  37 #define A_COND_VC 0x7
  38 #define A_COND_HI 0x8
  39 #define A_COND_LS 0x9
  40 #define A_COND_GE 0xa
  41 #define A_COND_LT 0xb
  42 #define A_COND_GT 0xc
  43 #define A_COND_LE 0xd
  44 #define A_COND_CS A_COND_HS
  45 #define A_COND_CC A_COND_LO
  46
  47 /* unified conditions */
  48 #define DCOND_EQ A_COND_EQ
  49 #define DCOND_NE A_COND_NE
  50 #define DCOND_MI A_COND_MI
  51 #define DCOND_PL A_COND_PL
  52 #define DCOND_HI A_COND_HI
  53 #define DCOND_HS A_COND_HS
  54 #define DCOND_LO A_COND_LO
  55 #define DCOND_GE A_COND_GE
  56 #define DCOND_GT A_COND_GT
  57 #define DCOND_LT A_COND_LT
  58 #define DCOND_LS A_COND_LS
  59 #define DCOND_LE A_COND_LE
  60 #define DCOND_VS A_COND_VS
  61 #define DCOND_VC A_COND_VC
  62
  63 /* addressing mode 1 */
  64 #define A_AM1_LSL 0
  65 #define A_AM1_LSR 1
  66 #define A_AM1_ASR 2
  67 #define A_AM1_ROR 3
  68
  69 #define A_AM1_IMM(ror2,imm8)                  (((ror2)<<8) | (imm8) | 0x02000000)
  70 #define A_AM1_REG_XIMM(shift_imm,shift_op,rm) (((shift_imm)<<7) | ((shift_op)<<5) | (rm))
  71 #define A_AM1_REG_XREG(rs,shift_op,rm)        (((rs)<<8) | ((shift_op)<<5) | 0x10 | (rm))
  72
  73 /* data processing op */
  74 #define A_OP_AND 0x0
  75 #define A_OP_EOR 0x1
  76 #define A_OP_SUB 0x2
  77 #define A_OP_RSB 0x3
  78 #define A_OP_ADD 0x4
  79 #define A_OP_ADC 0x5
  80 #define A_OP_SBC 0x6
  81 #define A_OP_RSC 0x7
  82 #define A_OP_TST 0x8
  83 #define A_OP_TEQ 0x9
  84 #define A_OP_CMP 0xa
  85 #define A_OP_CMN 0xa
  86 #define A_OP_ORR 0xc
  87 #define A_OP_MOV 0xd
  88 #define A_OP_BIC 0xe
  89 #define A_OP_MVN 0xf
  90
  91 #define EOP_C_DOP_X(cond,op,s,rn,rd,shifter_op) \
  92         EMIT(((cond)<<28) | ((op)<< 21) | ((s)<<20) | ((rn)<<16) | ((rd)<<12) | (shifter_op))
  93
  94 #define EOP_C_DOP_IMM(     cond,op,s,rn,rd,ror2,imm8)             EOP_C_DOP_X(cond,op,s,rn,rd,A_AM1_IMM(ror2,imm8))
  95 #define EOP_C_DOP_REG_XIMM(cond,op,s,rn,rd,shift_imm,shift_op,rm) EOP_C_DOP_X(cond,op,s,rn,rd,A_AM1_REG_XIMM(shift_imm,shift_op,rm))
  96 #define EOP_C_DOP_REG_XREG(cond,op,s,rn,rd,rs,       shift_op,rm) EOP_C_DOP_X(cond,op,s,rn,rd,A_AM1_REG_XREG(rs,       shift_op,rm))
  97
  98 #define EOP_MOV_IMM(rd,   ror2,imm8) EOP_C_DOP_IMM(A_COND_AL,A_OP_MOV,0, 0,rd,ror2,imm8)
  99 #define EOP_MVN_IMM(rd,   ror2,imm8) EOP_C_DOP_IMM(A_COND_AL,A_OP_MVN,0, 0,rd,ror2,imm8)
 100 #define EOP_ORR_IMM(rd,rn,ror2,imm8) EOP_C_DOP_IMM(A_COND_AL,A_OP_ORR,0,rn,rd,ror2,imm8)
 101 #define EOP_EOR_IMM(rd,rn,ror2,imm8) EOP_C_DOP_IMM(A_COND_AL,A_OP_EOR,0,rn,rd,ror2,imm8)
 102 #define EOP_ADD_IMM(rd,rn,ror2,imm8) EOP_C_DOP_IMM(A_COND_AL,A_OP_ADD,0,rn,rd,ror2,imm8)
 103 #define EOP_BIC_IMM(rd,rn,ror2,imm8) EOP_C_DOP_IMM(A_COND_AL,A_OP_BIC,0,rn,rd,ror2,imm8)
 104 #define EOP_AND_IMM(rd,rn,ror2,imm8) EOP_C_DOP_IMM(A_COND_AL,A_OP_AND,0,rn,rd,ror2,imm8)
 105 #define EOP_SUB_IMM(rd,rn,ror2,imm8) EOP_C_DOP_IMM(A_COND_AL,A_OP_SUB,0,rn,rd,ror2,imm8)
 106 #define EOP_TST_IMM(   rn,ror2,imm8) EOP_C_DOP_IMM(A_COND_AL,A_OP_TST,1,rn, 0,ror2,imm8)
 107 #define EOP_CMP_IMM(   rn,ror2,imm8) EOP_C_DOP_IMM(A_COND_AL,A_OP_CMP,1,rn, 0,ror2,imm8)
 108 #define EOP_RSB_IMM(rd,rn,ror2,imm8) EOP_C_DOP_IMM(A_COND_AL,A_OP_RSB,0,rn,rd,ror2,imm8)
 109
 110 #define EOP_MOV_IMM_C(cond,rd,   ror2,imm8) EOP_C_DOP_IMM(cond,A_OP_MOV,0, 0,rd,ror2,imm8)
 111 #define EOP_ORR_IMM_C(cond,rd,rn,ror2,imm8) EOP_C_DOP_IMM(cond,A_OP_ORR,0,rn,rd,ror2,imm8)
 112 #define EOP_RSB_IMM_C(cond,rd,rn,ror2,imm8) EOP_C_DOP_IMM(cond,A_OP_RSB,0,rn,rd,ror2,imm8)
 113
 114 #define EOP_MOV_REG(cond,s,rd,   rm,shift_op,shift_imm) EOP_C_DOP_REG_XIMM(cond,A_OP_MOV,s, 0,rd,shift_imm,shift_op,rm)
 115 #define EOP_MVN_REG(cond,s,rd,   rm,shift_op,shift_imm) EOP_C_DOP_REG_XIMM(cond,A_OP_MVN,s, 0,rd,shift_imm,shift_op,rm)
 116 #define EOP_ORR_REG(cond,s,rd,rn,rm,shift_op,shift_imm) EOP_C_DOP_REG_XIMM(cond,A_OP_ORR,s,rn,rd,shift_imm,shift_op,rm)
 117 #define EOP_ADD_REG(cond,s,rd,rn,rm,shift_op,shift_imm) EOP_C_DOP_REG_XIMM(cond,A_OP_ADD,s,rn,rd,shift_imm,shift_op,rm)
 118 #define EOP_ADC_REG(cond,s,rd,rn,rm,shift_op,shift_imm) EOP_C_DOP_REG_XIMM(cond,A_OP_ADC,s,rn,rd,shift_imm,shift_op,rm)
 119 #define EOP_SUB_REG(cond,s,rd,rn,rm,shift_op,shift_imm) EOP_C_DOP_REG_XIMM(cond,A_OP_SUB,s,rn,rd,shift_imm,shift_op,rm)
 120 #define EOP_SBC_REG(cond,s,rd,rn,rm,shift_op,shift_imm) EOP_C_DOP_REG_XIMM(cond,A_OP_SBC,s,rn,rd,shift_imm,shift_op,rm)
 121 #define EOP_AND_REG(cond,s,rd,rn,rm,shift_op,shift_imm) EOP_C_DOP_REG_XIMM(cond,A_OP_AND,s,rn,rd,shift_imm,shift_op,rm)
 122 #define EOP_EOR_REG(cond,s,rd,rn,rm,shift_op,shift_imm) EOP_C_DOP_REG_XIMM(cond,A_OP_EOR,s,rn,rd,shift_imm,shift_op,rm)
 123 #define EOP_CMP_REG(cond,     rn,rm,shift_op,shift_imm) EOP_C_DOP_REG_XIMM(cond,A_OP_CMP,1,rn, 0,shift_imm,shift_op,rm)
 124 #define EOP_TST_REG(cond,     rn,rm,shift_op,shift_imm) EOP_C_DOP_REG_XIMM(cond,A_OP_TST,1,rn, 0,shift_imm,shift_op,rm)
 125 #define EOP_TEQ_REG(cond,     rn,rm,shift_op,shift_imm) EOP_C_DOP_REG_XIMM(cond,A_OP_TEQ,1,rn, 0,shift_imm,shift_op,rm)
 126
 127 #define EOP_MOV_REG2(s,rd,   rm,shift_op,rs) EOP_C_DOP_REG_XREG(A_COND_AL,A_OP_MOV,s, 0,rd,rs,shift_op,rm)
 128 #define EOP_ADD_REG2(s,rd,rn,rm,shift_op,rs) EOP_C_DOP_REG_XREG(A_COND_AL,A_OP_ADD,s,rn,rd,rs,shift_op,rm)
 129 #define EOP_SUB_REG2(s,rd,rn,rm,shift_op,rs) EOP_C_DOP_REG_XREG(A_COND_AL,A_OP_SUB,s,rn,rd,rs,shift_op,rm)
 130
 131 #define EOP_MOV_REG_SIMPLE(rd,rm)           EOP_MOV_REG(A_COND_AL,0,rd,rm,A_AM1_LSL,0)
 132 #define EOP_MOV_REG_LSL(rd,   rm,shift_imm) EOP_MOV_REG(A_COND_AL,0,rd,rm,A_AM1_LSL,shift_imm)
 133 #define EOP_MOV_REG_LSR(rd,   rm,shift_imm) EOP_MOV_REG(A_COND_AL,0,rd,rm,A_AM1_LSR,shift_imm)
 134 #define EOP_MOV_REG_ASR(rd,   rm,shift_imm) EOP_MOV_REG(A_COND_AL,0,rd,rm,A_AM1_ASR,shift_imm)
 135 #define EOP_MOV_REG_ROR(rd,   rm,shift_imm) EOP_MOV_REG(A_COND_AL,0,rd,rm,A_AM1_ROR,shift_imm)
 136
 137 #define EOP_ORR_REG_SIMPLE(rd,rm)           EOP_ORR_REG(A_COND_AL,0,rd,rd,rm,A_AM1_LSL,0)
 138 #define EOP_ORR_REG_LSL(rd,rn,rm,shift_imm) EOP_ORR_REG(A_COND_AL,0,rd,rn,rm,A_AM1_LSL,shift_imm)
 139 #define EOP_ORR_REG_LSR(rd,rn,rm,shift_imm) EOP_ORR_REG(A_COND_AL,0,rd,rn,rm,A_AM1_LSR,shift_imm)
 140 #define EOP_ORR_REG_ASR(rd,rn,rm,shift_imm) EOP_ORR_REG(A_COND_AL,0,rd,rn,rm,A_AM1_ASR,shift_imm)
 141 #define EOP_ORR_REG_ROR(rd,rn,rm,shift_imm) EOP_ORR_REG(A_COND_AL,0,rd,rn,rm,A_AM1_ROR,shift_imm)
 142
 143 #define EOP_ADD_REG_SIMPLE(rd,rm)           EOP_ADD_REG(A_COND_AL,0,rd,rd,rm,A_AM1_LSL,0)
 144 #define EOP_ADD_REG_LSL(rd,rn,rm,shift_imm) EOP_ADD_REG(A_COND_AL,0,rd,rn,rm,A_AM1_LSL,shift_imm)
 145 #define EOP_ADD_REG_LSR(rd,rn,rm,shift_imm) EOP_ADD_REG(A_COND_AL,0,rd,rn,rm,A_AM1_LSR,shift_imm)
 146
 147 #define EOP_TST_REG_SIMPLE(rn,rm)           EOP_TST_REG(A_COND_AL,  rn,   0,A_AM1_LSL,rm)
 148
 149 #define EOP_MOV_REG2_LSL(rd,   rm,rs)       EOP_MOV_REG2(0,rd,   rm,A_AM1_LSL,rs)
 150 #define EOP_MOV_REG2_ROR(rd,   rm,rs)       EOP_MOV_REG2(0,rd,   rm,A_AM1_ROR,rs)
 151 #define EOP_ADD_REG2_LSL(rd,rn,rm,rs)       EOP_ADD_REG2(0,rd,rn,rm,A_AM1_LSL,rs)
 152 #define EOP_SUB_REG2_LSL(rd,rn,rm,rs)       EOP_SUB_REG2(0,rd,rn,rm,A_AM1_LSL,rs)
 153
 154 /* addressing mode 2 */
 155 #define EOP_C_AM2_IMM(cond,u,b,l,rn,rd,offset_12) \
 156         EMIT(((cond)<<28) | 0x05000000 | ((u)<<23) | ((b)<<22) | ((l)<<20) | ((rn)<<16) | ((rd)<<12) | (offset_12))
 157
 158 /* addressing mode 3 */
 159 #define EOP_C_AM3(cond,u,r,l,rn,rd,s,h,immed_reg) \
 160         EMIT(((cond)<<28) | 0x01000090 | ((u)<<23) | ((r)<<22) | ((l)<<20) | ((rn)<<16) | ((rd)<<12) | \
 161                         ((s)<<6) | ((h)<<5) | (immed_reg))
 162
 163 #define EOP_C_AM3_IMM(cond,u,l,rn,rd,s,h,offset_8) EOP_C_AM3(cond,u,1,l,rn,rd,s,h,(((offset_8)&0xf0)<<4)|((offset_8)&0xf))
 164
 165 #define EOP_C_AM3_REG(cond,u,l,rn,rd,s,h,rm)       EOP_C_AM3(cond,u,0,l,rn,rd,s,h,rm)
 166
 167 /* ldr and str */
 168 #define EOP_LDR_IMM(   rd,rn,offset_12) EOP_C_AM2_IMM(A_COND_AL,1,0,1,rn,rd,offset_12)
 169 #define EOP_LDR_NEGIMM(rd,rn,offset_12) EOP_C_AM2_IMM(A_COND_AL,0,0,1,rn,rd,offset_12)
 170 #define EOP_LDR_SIMPLE(rd,rn)           EOP_C_AM2_IMM(A_COND_AL,1,0,1,rn,rd,0)
 171 #define EOP_STR_IMM(   rd,rn,offset_12) EOP_C_AM2_IMM(A_COND_AL,1,0,0,rn,rd,offset_12)
 172 #define EOP_STR_SIMPLE(rd,rn)           EOP_C_AM2_IMM(A_COND_AL,1,0,0,rn,rd,0)
 173
 174 #define EOP_LDRH_IMM(   rd,rn,offset_8)  EOP_C_AM3_IMM(A_COND_AL,1,1,rn,rd,0,1,offset_8)
 175 #define EOP_LDRH_SIMPLE(rd,rn)           EOP_C_AM3_IMM(A_COND_AL,1,1,rn,rd,0,1,0)
 176 #define EOP_LDRH_REG(   rd,rn,rm)        EOP_C_AM3_REG(A_COND_AL,1,1,rn,rd,0,1,rm)
 177 #define EOP_STRH_IMM(   rd,rn,offset_8)  EOP_C_AM3_IMM(A_COND_AL,1,0,rn,rd,0,1,offset_8)
 178 #define EOP_STRH_SIMPLE(rd,rn)           EOP_C_AM3_IMM(A_COND_AL,1,0,rn,rd,0,1,0)
 179 #define EOP_STRH_REG(   rd,rn,rm)        EOP_C_AM3_REG(A_COND_AL,1,0,rn,rd,0,1,rm)
 180
 181 /* ldm and stm */
 182 #define EOP_XXM(cond,p,u,s,w,l,rn,list) \
 183         EMIT(((cond)<<28) | (1<<27) | ((p)<<24) | ((u)<<23) | ((s)<<22) | ((w)<<21) | ((l)<<20) | ((rn)<<16) | (list))
 184
 185 #define EOP_STMIA(rb,list) EOP_XXM(A_COND_AL,0,1,0,0,0,rb,list)
 186 #define EOP_LDMIA(rb,list) EOP_XXM(A_COND_AL,0,1,0,0,1,rb,list)
 187
 188 #define EOP_STMFD_SP(list) EOP_XXM(A_COND_AL,1,0,0,1,0,13,list)
 189 #define EOP_LDMFD_SP(list) EOP_XXM(A_COND_AL,0,1,0,1,1,13,list)
 190
 191 /* branches */
 192 #define EOP_C_BX(cond,rm) \
 193         EMIT(((cond)<<28) | 0x012fff10 | (rm))
 194
 195 #define EOP_BX(rm) EOP_C_BX(A_COND_AL,rm)
 196
 197 #define EOP_C_B_PTR(ptr,cond,l,signed_immed_24) \
 198         EMIT_PTR(ptr, ((cond)<<28) | 0x0a000000 | ((l)<<24) | (signed_immed_24))
 199
 200 #define EOP_C_B(cond,l,signed_immed_24) \
 201         EOP_C_B_PTR(tcache_ptr,cond,l,signed_immed_24)
 202
 203 #define EOP_B( signed_immed_24) EOP_C_B(A_COND_AL,0,signed_immed_24)
 204 #define EOP_BL(signed_immed_24) EOP_C_B(A_COND_AL,1,signed_immed_24)
 205
 206 /* misc */
 207 #define EOP_C_MUL(cond,s,rd,rs,rm) \
 208         EMIT(((cond)<<28) | ((s)<<20) | ((rd)<<16) | ((rs)<<8) | 0x90 | (rm))
 209
 210 #define EOP_C_UMULL(cond,s,rdhi,rdlo,rs,rm) \
 211         EMIT(((cond)<<28) | 0x00800000 | ((s)<<20) | ((rdhi)<<16) | ((rdlo)<<12) | ((rs)<<8) | 0x90 | (rm))
 212
 213 #define EOP_C_SMULL(cond,s,rdhi,rdlo,rs,rm) \
 214         EMIT(((cond)<<28) | 0x00c00000 | ((s)<<20) | ((rdhi)<<16) | ((rdlo)<<12) | ((rs)<<8) | 0x90 | (rm))
 215
 216 #define EOP_C_SMLAL(cond,s,rdhi,rdlo,rs,rm) \
 217         EMIT(((cond)<<28) | 0x00e00000 | ((s)<<20) | ((rdhi)<<16) | ((rdlo)<<12) | ((rs)<<8) | 0x90 | (rm))
 218
 219 #define EOP_MUL(rd,rm,rs) EOP_C_MUL(A_COND_AL,0,rd,rs,rm) // note: rd != rm
 220
 221 #define EOP_C_MRS(cond,rd) \
 222         EMIT(((cond)<<28) | 0x010f0000 | ((rd)<<12))
 223
 224 #define EOP_C_MSR_IMM(cond,ror2,imm) \
 225         EMIT(((cond)<<28) | 0x0328f000 | ((ror2)<<8) | (imm)) // cpsr_f
 226
 227 #define EOP_C_MSR_REG(cond,rm) \
 228         EMIT(((cond)<<28) | 0x0128f000 | (rm)) // cpsr_f
 229
 230 #define EOP_MRS(rd)           EOP_C_MRS(A_COND_AL,rd)
 231 #define EOP_MSR_IMM(ror2,imm) EOP_C_MSR_IMM(A_COND_AL,ror2,imm)
 232 #define EOP_MSR_REG(rm)       EOP_C_MSR_REG(A_COND_AL,rm)
 233
 234
 235 static void emith_op_imm2(int cond, int s, int op, int rd, int rn, unsigned int imm)
 236 {
 237         int ror2;
 238         u32 v;
 239
 240         if (op == A_OP_MOV) {
 241                 rn = 0;
 242                 if (~imm < 0x100) {
 243                         imm = ~imm;
 244                         op = A_OP_MVN;
 245                 }
 246         } else if (imm == 0)
 247                 return;
 248
 249         for (v = imm, ror2 = 0; v != 0 || op == A_OP_MOV; v >>= 8, ror2 -= 8/2) {
 250                 /* shift down to get 'best' rot2 */
 251                 for (; v && !(v & 3); v >>= 2)
 252                         ror2--;
 253
 254                 EOP_C_DOP_IMM(cond, op, s, rn, rd, ror2 & 0x0f, v & 0xff);
 255
 256                 if (op == A_OP_MOV) {
 257                         op = A_OP_ORR;
 258                         rn = rd;
 259                 }
 260         }
 261 }
 262
 263 #define emith_op_imm(cond, s, op, r, imm) \
 264         emith_op_imm2(cond, s, op, r, r, imm)
 265
 266 // test op
 267 #define emith_top_imm(cond, op, r, imm) do { \
 268         u32 ror2, v; \
 269         for (ror2 = 0, v = imm; v && !(v & 3); v >>= 2) \
 270                 ror2--; \
 271         EOP_C_DOP_IMM(cond, op, 1, r, 0, ror2 & 0x0f, v & 0xff); \
 272 } while (0)
 273
 274 #define is_offset_24(val) \
 275         ((val) >= (int)0xff000000 && (val) <= 0x00ffffff)
 276
 277 static int emith_xbranch(int cond, void *target, int is_call)
 278 {
 279         int val = (u32 *)target - (u32 *)tcache_ptr - 2;
 280         int direct = is_offset_24(val);
 281         u32 *start_ptr = (u32 *)tcache_ptr;
 282
 283         if (direct)
 284         {
 285                 EOP_C_B(cond,is_call,val & 0xffffff);           // b, bl target
 286         }
 287         else
 288         {
 289 #ifdef __EPOC32__
 290 //              elprintf(EL_SVP, "emitting indirect jmp %08x->%08x", tcache_ptr, target);
 291                 if (is_call)
 292                         EOP_ADD_IMM(14,15,0,8);                 // add lr,pc,#8
 293                 EOP_C_AM2_IMM(cond,1,0,1,15,15,0);              // ldrcc pc,[pc]
 294                 EOP_MOV_REG_SIMPLE(15,15);                      // mov pc, pc
 295                 EMIT((u32)target);
 296 #else
 297                 // should never happen
 298                 elprintf(EL_STATUS|EL_SVP|EL_ANOMALY, "indirect jmp %08x->%08x", target, tcache_ptr);
 299                 exit(1);
 300 #endif
 301         }
 302
 303         return (u32 *)tcache_ptr - start_ptr;
 304 }
 305
 306 #define JMP_POS(ptr) \
 307         ptr = tcache_ptr; \
 308         tcache_ptr += sizeof(u32)
 309
 310 #define JMP_EMIT(cond, ptr) { \
 311         int val = (u32 *)tcache_ptr - (u32 *)(ptr) - 2; \
 312         EOP_C_B_PTR(ptr, cond, 0, val & 0xffffff); \
 313 }
 314
 315 #define EMITH_JMP_START(cond) { \
 316         void *cond_ptr; \
 317         JMP_POS(cond_ptr)
 318
 319 #define EMITH_JMP_END(cond) \
 320         JMP_EMIT(cond, cond_ptr); \
 321 }
 322
 323 // fake "simple" or "short" jump - using cond insns instead
 324 #define EMITH_SJMP_START(cond) \
 325         (void)(cond)
 326
 327 #define EMITH_SJMP_END(cond) \
 328         (void)(cond)
 329
 330 #define emith_move_r_r(d, s) \
 331         EOP_MOV_REG_SIMPLE(d, s)
 332
 333 #define emith_mvn_r_r(d, s) \
 334         EOP_MVN_REG(A_COND_AL,0,d,s,A_AM1_LSL,0)
 335
 336 #define emith_or_r_r_r_lsl(d, s1, s2, lslimm) \
 337         EOP_ORR_REG(A_COND_AL,0,d,s1,s2,A_AM1_LSL,lslimm)
 338
 339 #define emith_eor_r_r_r_lsl(d, s1, s2, lslimm) \
 340         EOP_EOR_REG(A_COND_AL,0,d,s1,s2,A_AM1_LSL,lslimm)
 341
 342 #define emith_eor_r_r_r_lsr(d, s1, s2, lsrimm) \
 343         EOP_EOR_REG(A_COND_AL,0,d,s1,s2,A_AM1_LSR,lsrimm)
 344
 345 #define emith_or_r_r_lsl(d, s, lslimm) \
 346         emith_or_r_r_r_lsl(d, d, s, lslimm)
 347
 348 #define emith_eor_r_r_lsr(d, s, lsrimm) \
 349         emith_eor_r_r_r_lsr(d, d, s, lsrimm)
 350
 351 #define emith_or_r_r_r(d, s1, s2) \
 352         emith_or_r_r_r_lsl(d, s1, s2, 0)
 353
 354 #define emith_eor_r_r_r(d, s1, s2) \
 355         emith_eor_r_r_r_lsl(d, s1, s2, 0)
 356
 357 #define emith_add_r_r(d, s) \
 358         EOP_ADD_REG(A_COND_AL,0,d,d,s,A_AM1_LSL,0)
 359
 360 #define emith_sub_r_r(d, s) \
 361         EOP_SUB_REG(A_COND_AL,0,d,d,s,A_AM1_LSL,0)
 362
 363 #define emith_adc_r_r(d, s) \
 364         EOP_ADC_REG(A_COND_AL,0,d,d,s,A_AM1_LSL,0)
 365
 366 #define emith_and_r_r(d, s) \
 367         EOP_AND_REG(A_COND_AL,0,d,d,s,A_AM1_LSL,0)
 368
 369 #define emith_or_r_r(d, s) \
 370         emith_or_r_r_r(d, d, s)
 371
 372 #define emith_eor_r_r(d, s) \
 373         emith_eor_r_r_r(d, d, s)
 374
 375 #define emith_tst_r_r(d, s) \
 376         EOP_TST_REG(A_COND_AL,d,s,A_AM1_LSL,0)
 377
 378 #define emith_teq_r_r(d, s) \
 379         EOP_TEQ_REG(A_COND_AL,d,s,A_AM1_LSL,0)
 380
 381 #define emith_cmp_r_r(d, s) \
 382         EOP_CMP_REG(A_COND_AL,d,s,A_AM1_LSL,0)
 383
 384 #define emith_addf_r_r(d, s) \
 385         EOP_ADD_REG(A_COND_AL,1,d,d,s,A_AM1_LSL,0)
 386
 387 #define emith_subf_r_r(d, s) \
 388         EOP_SUB_REG(A_COND_AL,1,d,d,s,A_AM1_LSL,0)
 389
 390 #define emith_adcf_r_r(d, s) \
 391         EOP_ADC_REG(A_COND_AL,1,d,d,s,A_AM1_LSL,0)
 392
 393 #define emith_sbcf_r_r(d, s) \
 394         EOP_SBC_REG(A_COND_AL,1,d,d,s,A_AM1_LSL,0)
 395
 396 #define emith_eorf_r_r(d, s) \
 397         EOP_EOR_REG(A_COND_AL,1,d,d,s,A_AM1_LSL,0)
 398
 399 #define emith_move_r_imm(r, imm) \
 400         emith_op_imm(A_COND_AL, 0, A_OP_MOV, r, imm)
 401
 402 #define emith_add_r_imm(r, imm) \
 403         emith_op_imm(A_COND_AL, 0, A_OP_ADD, r, imm)
 404
 405 #define emith_sub_r_imm(r, imm) \
 406         emith_op_imm(A_COND_AL, 0, A_OP_SUB, r, imm)
 407
 408 #define emith_bic_r_imm(r, imm) \
 409         emith_op_imm(A_COND_AL, 0, A_OP_BIC, r, imm)
 410
 411 #define emith_and_r_imm(r, imm) \
 412         emith_op_imm(A_COND_AL, 0, A_OP_AND, r, imm)
 413
 414 #define emith_or_r_imm(r, imm) \
 415         emith_op_imm(A_COND_AL, 0, A_OP_ORR, r, imm)
 416
 417 #define emith_eor_r_imm(r, imm) \
 418         emith_op_imm(A_COND_AL, 0, A_OP_EOR, r, imm)
 419
 420 // note: only use 8bit imm for these
 421 #define emith_tst_r_imm(r, imm) \
 422         emith_top_imm(A_COND_AL, A_OP_TST, r, imm)
 423
 424 #define emith_cmp_r_imm(r, imm) { \
 425         u32 op = A_OP_CMP, imm_ = imm; \
 426         if (~imm_ < 0x100) { \
 427                 imm_ = ~imm_; \
 428                 op = A_OP_CMN; \
 429         } \
 430         emith_top_imm(A_COND_AL, op, r, imm); \
 431 }
 432
 433 #define emith_subf_r_imm(r, imm) \
 434         emith_op_imm(A_COND_AL, 1, A_OP_SUB, r, imm)
 435
 436 #define emith_move_r_imm_c(cond, r, imm) \
 437         emith_op_imm(cond, 0, A_OP_MOV, r, imm)
 438
 439 #define emith_add_r_imm_c(cond, r, imm) \
 440         emith_op_imm(cond, 0, A_OP_ADD, r, imm)
 441
 442 #define emith_sub_r_imm_c(cond, r, imm) \
 443         emith_op_imm(cond, 0, A_OP_SUB, r, imm)
 444
 445 #define emith_or_r_imm_c(cond, r, imm) \
 446         emith_op_imm(cond, 0, A_OP_ORR, r, imm)
 447
 448 #define emith_eor_r_imm_c(cond, r, imm) \
 449         emith_op_imm(cond, 0, A_OP_EOR, r, imm)
 450
 451 #define emith_bic_r_imm_c(cond, r, imm) \
 452         emith_op_imm(cond, 0, A_OP_BIC, r, imm)
 453
 454 #define emith_move_r_imm_s8(r, imm) { \
 455         if ((imm) & 0x80) \
 456                 EOP_MVN_IMM(r, 0, ((imm) ^ 0xff)); \
 457         else \
 458                 EOP_MOV_IMM(r, 0, imm); \
 459 }
 460
 461 #define emith_and_r_r_imm(d, s, imm) \
 462         emith_op_imm2(A_COND_AL, 0, A_OP_AND, d, s, imm)
 463
 464 #define emith_neg_r_r(d, s) \
 465         EOP_RSB_IMM(d, s, 0, 0)
 466
 467 #define emith_lsl(d, s, cnt) \
 468         EOP_MOV_REG(A_COND_AL,0,d,s,A_AM1_LSL,cnt)
 469
 470 #define emith_lsr(d, s, cnt) \
 471         EOP_MOV_REG(A_COND_AL,0,d,s,A_AM1_LSR,cnt)
 472
 473 #define emith_asr(d, s, cnt) \
 474         EOP_MOV_REG(A_COND_AL,0,d,s,A_AM1_ASR,cnt)
 475
 476 #define emith_ror(d, s, cnt) \
 477         EOP_MOV_REG(A_COND_AL,0,d,s,A_AM1_ROR,cnt)
 478
 479 #define emith_rol(d, s, cnt) \
 480         EOP_MOV_REG(A_COND_AL,0,d,s,A_AM1_ROR,32-(cnt)); \
 481
 482 #define emith_lslf(d, s, cnt) \
 483         EOP_MOV_REG(A_COND_AL,1,d,s,A_AM1_LSL,cnt)
 484
 485 #define emith_lsrf(d, s, cnt) \
 486         EOP_MOV_REG(A_COND_AL,1,d,s,A_AM1_LSR,cnt)
 487
 488 #define emith_asrf(d, s, cnt) \
 489         EOP_MOV_REG(A_COND_AL,1,d,s,A_AM1_ASR,cnt)
 490
 491 // note: only C flag updated correctly
 492 #define emith_rolf(d, s, cnt) { \
 493         EOP_MOV_REG(A_COND_AL,1,d,s,A_AM1_ROR,32-(cnt)); \
 494         /* we don't have ROL so we shift to get the right carry */ \
 495         EOP_TST_REG(A_COND_AL,d,d,A_AM1_LSR,1); \
 496 }
 497
 498 #define emith_rorf(d, s, cnt) \
 499         EOP_MOV_REG(A_COND_AL,1,d,s,A_AM1_ROR,cnt)
 500
 501 #define emith_rolcf(d) \
 502         emith_adcf_r_r(d, d)
 503
 504 #define emith_rorcf(d) \
 505         EOP_MOV_REG(A_COND_AL,1,d,d,A_AM1_ROR,0) /* ROR #0 -> RRX */
 506
 507 #define emith_negcf_r_r(d, s) \
 508         EOP_C_DOP_IMM(A_COND_AL,A_OP_RSC,1,s,d,0,0)
 509
 510 #define emith_mul(d, s1, s2) { \
 511         if ((d) != (s1)) /* rd != rm limitation */ \
 512                 EOP_MUL(d, s1, s2); \
 513         else \
 514                 EOP_MUL(d, s2, s1); \
 515 }
 516
 517 #define emith_mul_u64(dlo, dhi, s1, s2) \
 518         EOP_C_UMULL(A_COND_AL,0,dhi,dlo,s1,s2)
 519
 520 #define emith_mul_s64(dlo, dhi, s1, s2) \
 521         EOP_C_SMULL(A_COND_AL,0,dhi,dlo,s1,s2)
 522
 523 #define emith_mula_s64(dlo, dhi, s1, s2) \
 524         EOP_C_SMLAL(A_COND_AL,0,dhi,dlo,s1,s2)
 525
 526 // misc
 527 #define emith_ctx_read(r, offs) \
 528         EOP_LDR_IMM(r, CONTEXT_REG, offs)
 529
 530 #define emith_ctx_write(r, offs) \
 531         EOP_STR_IMM(r, CONTEXT_REG, offs)
 532
 533 #define emith_ctx_do_multiple(op, r, offs, count, tmpr) do { \
 534         int v_, r_ = r, c_ = count, b_ = CONTEXT_REG;        \
 535         for (v_ = 0; c_; c_--, r_++)                         \
 536                 v_ |= 1 << r_;                               \
 537         if ((offs) != 0) {                                   \
 538                 EOP_ADD_IMM(tmpr,CONTEXT_REG,30/2,(offs)>>2);\
 539                 b_ = tmpr;                                   \
 540         }                                                    \
 541         op(b_,v_);                                           \
 542 } while(0)
 543
 544 #define emith_ctx_read_multiple(r, offs, count, tmpr) \
 545         emith_ctx_do_multiple(EOP_LDMIA, r, offs, count, tmpr)
 546
 547 #define emith_ctx_write_multiple(r, offs, count, tmpr) \
 548         emith_ctx_do_multiple(EOP_STMIA, r, offs, count, tmpr)
 549
 550 #define emith_clear_msb_c(cond, d, s, count) { \
 551         u32 t; \
 552         if ((count) <= 8) { \
 553                 t = (count) - 8; \
 554                 t = (0xff << t) & 0xff; \
 555                 EOP_BIC_IMM(d,s,8/2,t); \
 556                 EOP_C_DOP_IMM(cond,A_OP_BIC,0,s,d,8/2,t); \
 557         } else if ((count) >= 24) { \
 558                 t = (count) - 24; \
 559                 t = 0xff >> t; \
 560                 EOP_AND_IMM(d,s,0,t); \
 561                 EOP_C_DOP_IMM(cond,A_OP_AND,0,s,d,0,t); \
 562         } else { \
 563                 EOP_MOV_REG(cond,0,d,s,A_AM1_LSL,count); \
 564                 EOP_MOV_REG(cond,0,d,d,A_AM1_LSR,count); \
 565         } \
 566 }
 567
 568 #define emith_clear_msb(d, s, count) \
 569         emith_clear_msb_c(A_COND_AL, d, s, count)
 570
 571 #define emith_sext(d, s, bits) { \
 572         EOP_MOV_REG_LSL(d,s,32 - (bits)); \
 573         EOP_MOV_REG_ASR(d,d,32 - (bits)); \
 574 }
 575
 576 #define host_arg2reg(rd, arg) \
 577         rd = arg
 578
 579 // upto 4 args
 580 #define emith_pass_arg_r(arg, reg) \
 581         EOP_MOV_REG_SIMPLE(arg, reg)
 582
 583 #define emith_pass_arg_imm(arg, imm) \
 584         emith_move_r_imm(arg, imm)
 585
 586 #define emith_call_cond(cond, target) \
 587         emith_xbranch(cond, target, 1)
 588
 589 #define emith_jump_cond(cond, target) \
 590         emith_xbranch(cond, target, 0)
 591
 592 #define emith_call(target) \
 593         emith_call_cond(A_COND_AL, target)
 594
 595 #define emith_jump(target) \
 596         emith_jump_cond(A_COND_AL, target)
 597
 598 #define emith_jump_patchable(cond) \
 599         emith_jump_cond(cond, 0)
 600
 601 #define emith_jump_patch(ptr, target) do { \
 602         u32 *ptr_ = ptr; \
 603         u32 val = (u32 *)(target) - (u32 *)ptr_ - 2; \
 604         *ptr_ = (*ptr_ & 0xff000000) | (val & 0x00ffffff); \
 605 } while (0)
 606
 607 #define emith_jump_reg(r) \
 608         EOP_BX(r)
 609
 610 /* SH2 drc specific */
 611 #define emith_sh2_drc_entry() \
 612         EOP_STMFD_SP(A_R4M|A_R5M|A_R6M|A_R7M|A_R8M|A_R9M|A_R10M|A_R11M|A_R14M)
 613
 614 #define emith_sh2_drc_exit() \
 615         EOP_LDMFD_SP(A_R4M|A_R5M|A_R6M|A_R7M|A_R8M|A_R9M|A_R10M|A_R11M|A_R15M)
 616
 617 #define emith_sh2_dtbf_loop() { \
 618         int cr, rn;                                                          \
 619         int tmp_ = rcache_get_tmp();                                         \
 620         cr = rcache_get_reg(SHR_SR, RC_GR_RMW);                              \
 621         rn = rcache_get_reg((op >> 8) & 0x0f, RC_GR_RMW);                    \
 622         emith_sub_r_imm(rn, 1);                /* sub rn, #1 */              \
 623         emith_bic_r_imm(cr, 1);                /* bic cr, #1 */              \
 624         emith_sub_r_imm(cr, (cycles+1) << 12); /* sub cr, #(cycles+1)<<12 */ \
 625         cycles = 0;                                                          \
 626         emith_asrf(tmp_, cr, 2+12);            /* movs tmp_, cr, asr #2+12 */\
 627         EOP_MOV_IMM_C(A_COND_MI,tmp_,0,0);     /* movmi tmp_, #0 */          \
 628         emith_lsl(cr, cr, 20);                 /* mov cr, cr, lsl #20 */     \
 629         emith_lsr(cr, cr, 20);                 /* mov cr, cr, lsr #20 */     \
 630         emith_subf_r_r(rn, tmp_);              /* subs rn, tmp_ */           \
 631         EOP_RSB_IMM_C(A_COND_LS,tmp_,rn,0,0);  /* rsbls tmp_, rn, #0 */      \
 632         EOP_ORR_REG(A_COND_LS,0,cr,cr,tmp_,A_AM1_LSL,12+2); /* orrls cr,tmp_,lsl #12+2 */\
 633         EOP_ORR_IMM_C(A_COND_LS,cr,cr,0,1);    /* orrls cr, #1 */            \
 634         EOP_MOV_IMM_C(A_COND_LS,rn,0,0);       /* movls rn, #0 */            \
 635         rcache_free_tmp(tmp_);                                               \
 636 }
 637
 638 #define emith_write_sr(sr, srcr) { \
 639         emith_lsr(sr, sr, 10); \
 640         emith_or_r_r_r_lsl(sr, sr, srcr, 22); \
 641         emith_ror(sr, sr, 22); \
 642 }
 643
 644 #define emith_carry_to_t(srr, is_sub) { \
 645         if (is_sub) { /* has inverted C on ARM */ \
 646                 emith_or_r_imm_c(A_COND_CC, srr, 1); \
 647                 emith_bic_r_imm_c(A_COND_CS, srr, 1); \
 648         } else { \
 649                 emith_or_r_imm_c(A_COND_CS, srr, 1); \
 650                 emith_bic_r_imm_c(A_COND_CC, srr, 1); \
 651         } \
 652 }
 653
 654 #define emith_tpop_carry(sr, is_sub) {  \
 655         if (is_sub)                     \
 656                 emith_eor_r_imm(sr, 1); \
 657         emith_lsrf(sr, sr, 1);          \
 658 }
 659
 660 #define emith_tpush_carry(sr, is_sub) { \
 661         emith_adc_r_r(sr, sr);          \
 662         if (is_sub)                     \
 663                 emith_eor_r_imm(sr, 1); \
 664 }
 665
 666 /*
 667  * if Q
 668  *   t = carry(Rn += Rm)
 669  * else
 670  *   t = carry(Rn -= Rm)
 671  * T ^= t
 672  */
 673 #define emith_sh2_div1_step(rn, rm, sr) {         \
 674         void *jmp0, *jmp1;                        \
 675         emith_tst_r_imm(sr, Q);  /* if (Q ^ M) */ \
 676         JMP_POS(jmp0);           /* beq do_sub */ \
 677         emith_addf_r_r(rn, rm);                   \
 678         emith_eor_r_imm_c(A_COND_CS, sr, T);      \
 679         JMP_POS(jmp1);           /* b done */     \
 680         JMP_EMIT(A_COND_EQ, jmp0); /* do_sub: */  \
 681         emith_subf_r_r(rn, rm);                   \
 682         emith_eor_r_imm_c(A_COND_CC, sr, T);      \
 683         JMP_EMIT(A_COND_AL, jmp1); /* done: */    \
 684 }
 685