annotate third_party/luajit/src/lj_emit_arm64.h @ 205:e07b4b5a66bb

Bad named files.
author MrJuneJune <me@mrjunejune.com>
date Sun, 15 Feb 2026 11:07:52 -0800
parents 94705b5986b3
children
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rev   line source
178
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1 /*
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2 ** ARM64 instruction emitter.
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3 ** Copyright (C) 2005-2023 Mike Pall. See Copyright Notice in luajit.h
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4 **
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5 ** Contributed by Djordje Kovacevic and Stefan Pejic from RT-RK.com.
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6 ** Sponsored by Cisco Systems, Inc.
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7 */
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8
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9 /* -- Constant encoding --------------------------------------------------- */
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10
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11 static uint64_t get_k64val(ASMState *as, IRRef ref)
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12 {
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13 IRIns *ir = IR(ref);
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14 if (ir->o == IR_KINT64) {
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15 return ir_kint64(ir)->u64;
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16 } else if (ir->o == IR_KGC) {
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17 return (uint64_t)ir_kgc(ir);
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18 } else if (ir->o == IR_KPTR || ir->o == IR_KKPTR) {
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19 return (uint64_t)ir_kptr(ir);
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20 } else {
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21 lj_assertA(ir->o == IR_KINT || ir->o == IR_KNULL,
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22 "bad 64 bit const IR op %d", ir->o);
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23 return ir->i; /* Sign-extended. */
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24 }
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25 }
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26
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27 /* Encode constant in K12 format for data processing instructions. */
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28 static uint32_t emit_isk12(int64_t n)
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29 {
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30 uint64_t k = n < 0 ? ~(uint64_t)n+1u : (uint64_t)n;
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31 uint32_t m = n < 0 ? 0x40000000 : 0;
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32 if (k < 0x1000) {
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33 return A64I_K12|m|A64F_U12(k);
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34 } else if ((k & 0xfff000) == k) {
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35 return A64I_K12|m|0x400000|A64F_U12(k>>12);
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36 }
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37 return 0;
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38 }
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39
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40 #define emit_clz64(n) __builtin_clzll(n)
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41 #define emit_ctz64(n) __builtin_ctzll(n)
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42
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43 /* Encode constant in K13 format for logical data processing instructions. */
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44 static uint32_t emit_isk13(uint64_t n, int is64)
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45 {
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46 int inv = 0, w = 128, lz, tz;
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47 if (n & 1) { n = ~n; w = 64; inv = 1; } /* Avoid wrap-around of ones. */
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48 if (!n) return 0; /* Neither all-zero nor all-ones are allowed. */
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49 do { /* Find the repeat width. */
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50 if (is64 && (uint32_t)(n^(n>>32))) break;
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51 n = (uint32_t)n;
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52 if (!n) return 0; /* Ditto when passing n=0xffffffff and is64=0. */
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53 w = 32; if ((n^(n>>16)) & 0xffff) break;
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54 n = n & 0xffff; w = 16; if ((n^(n>>8)) & 0xff) break;
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55 n = n & 0xff; w = 8; if ((n^(n>>4)) & 0xf) break;
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56 n = n & 0xf; w = 4; if ((n^(n>>2)) & 0x3) break;
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57 n = n & 0x3; w = 2;
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58 } while (0);
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59 lz = emit_clz64(n);
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60 tz = emit_ctz64(n);
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61 if ((int64_t)(n << lz) >> (lz+tz) != -1ll) return 0; /* Non-contiguous? */
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62 if (inv)
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63 return A64I_K13 | (((lz-w) & 127) << 16) | (((lz+tz-w-1) & 63) << 10);
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64 else
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65 return A64I_K13 | ((w-tz) << 16) | (((63-lz-tz-w-w) & 63) << 10);
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66 }
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67
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68 static uint32_t emit_isfpk64(uint64_t n)
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69 {
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70 uint64_t etop9 = ((n >> 54) & 0x1ff);
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71 if ((n << 16) == 0 && (etop9 == 0x100 || etop9 == 0x0ff)) {
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72 return (uint32_t)(((n >> 48) & 0x7f) | ((n >> 56) & 0x80));
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73 }
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74 return ~0u;
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75 }
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76
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77 /* -- Emit basic instructions --------------------------------------------- */
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78
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79 static void emit_dnma(ASMState *as, A64Ins ai, Reg rd, Reg rn, Reg rm, Reg ra)
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80 {
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81 *--as->mcp = ai | A64F_D(rd) | A64F_N(rn) | A64F_M(rm) | A64F_A(ra);
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82 }
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83
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84 static void emit_dnm(ASMState *as, A64Ins ai, Reg rd, Reg rn, Reg rm)
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85 {
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86 *--as->mcp = ai | A64F_D(rd) | A64F_N(rn) | A64F_M(rm);
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87 }
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88
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89 static void emit_dm(ASMState *as, A64Ins ai, Reg rd, Reg rm)
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90 {
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91 *--as->mcp = ai | A64F_D(rd) | A64F_M(rm);
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92 }
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93
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94 static void emit_dn(ASMState *as, A64Ins ai, Reg rd, Reg rn)
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95 {
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96 *--as->mcp = ai | A64F_D(rd) | A64F_N(rn);
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97 }
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98
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99 static void emit_nm(ASMState *as, A64Ins ai, Reg rn, Reg rm)
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100 {
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101 *--as->mcp = ai | A64F_N(rn) | A64F_M(rm);
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102 }
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103
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104 static void emit_d(ASMState *as, A64Ins ai, Reg rd)
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105 {
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106 *--as->mcp = ai | A64F_D(rd);
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107 }
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108
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109 static void emit_n(ASMState *as, A64Ins ai, Reg rn)
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110 {
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111 *--as->mcp = ai | A64F_N(rn);
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112 }
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113
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114 static int emit_checkofs(A64Ins ai, int64_t ofs)
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115 {
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116 int scale = (ai >> 30) & 3;
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117 if (ofs < 0 || (ofs & ((1<<scale)-1))) {
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118 return (ofs >= -256 && ofs <= 255) ? -1 : 0;
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119 } else {
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120 return (ofs < (4096<<scale)) ? 1 : 0;
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121 }
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122 }
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123
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124 static void emit_lso(ASMState *as, A64Ins ai, Reg rd, Reg rn, int64_t ofs)
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125 {
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
126 int ot = emit_checkofs(ai, ofs), sc = (ai >> 30) & 3;
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
127 lj_assertA(ot, "load/store offset %d out of range", ofs);
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
128 /* Combine LDR/STR pairs to LDP/STP. */
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
129 if ((sc == 2 || sc == 3) &&
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
130 (!(ai & 0x400000) || rd != rn) &&
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
131 as->mcp != as->mcloop) {
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
132 uint32_t prev = *as->mcp & ~A64F_D(31);
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
133 int ofsm = ofs - (1<<sc), ofsp = ofs + (1<<sc);
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
134 A64Ins aip;
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
135 if (prev == (ai | A64F_N(rn) | A64F_U12(ofsm>>sc)) ||
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
136 prev == ((ai^A64I_LS_U) | A64F_N(rn) | A64F_S9(ofsm&0x1ff))) {
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
137 aip = (A64F_A(rd) | A64F_D(*as->mcp & 31));
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
138 } else if (prev == (ai | A64F_N(rn) | A64F_U12(ofsp>>sc)) ||
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
139 prev == ((ai^A64I_LS_U) | A64F_N(rn) | A64F_S9(ofsp&0x1ff))) {
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
140 aip = (A64F_D(rd) | A64F_A(*as->mcp & 31));
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
141 ofsm = ofs;
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
142 } else {
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
143 goto nopair;
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
144 }
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
145 if (ofsm >= (int)((unsigned int)-64<<sc) && ofsm <= (63<<sc)) {
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
146 *as->mcp = aip | A64F_N(rn) | (((ofsm >> sc) & 0x7f) << 15) |
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
147 (ai ^ ((ai == A64I_LDRx || ai == A64I_STRx) ? 0x50000000 : 0x90000000));
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
148 return;
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
149 }
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
150 }
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
151 nopair:
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
152 if (ot == 1)
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
153 *--as->mcp = ai | A64F_D(rd) | A64F_N(rn) | A64F_U12(ofs >> sc);
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
154 else
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
155 *--as->mcp = (ai^A64I_LS_U) | A64F_D(rd) | A64F_N(rn) | A64F_S9(ofs & 0x1ff);
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
156 }
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
157
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
158 /* -- Emit loads/stores --------------------------------------------------- */
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
159
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
160 /* Prefer rematerialization of BASE/L from global_State over spills. */
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
161 #define emit_canremat(ref) ((ref) <= ASMREF_L)
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
162
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
163 /* Try to find an N-step delta relative to other consts with N < lim. */
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
164 static int emit_kdelta(ASMState *as, Reg rd, uint64_t k, int lim)
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
165 {
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
166 RegSet work = (~as->freeset & RSET_GPR) | RID2RSET(RID_GL);
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
167 if (lim <= 1) return 0; /* Can't beat that. */
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
168 while (work) {
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
169 Reg r = rset_picktop(work);
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
170 IRRef ref = regcost_ref(as->cost[r]);
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
171 lj_assertA(r != rd, "dest reg %d not free", rd);
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
172 if (ref < REF_TRUE) {
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
173 uint64_t kx = ra_iskref(ref) ? (uint64_t)ra_krefk(as, ref) :
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
174 get_k64val(as, ref);
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
175 int64_t delta = (int64_t)(k - kx);
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
176 if (delta == 0) {
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
177 emit_dm(as, A64I_MOVx, rd, r);
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
178 return 1;
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
179 } else {
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
180 uint32_t k12 = emit_isk12(delta < 0 ? (int64_t)(~(uint64_t)delta+1u) : delta);
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
181 if (k12) {
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
182 emit_dn(as, (delta < 0 ? A64I_SUBx : A64I_ADDx)^k12, rd, r);
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
183 return 1;
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
184 }
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
185 /* Do other ops or multi-step deltas pay off? Probably not.
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
186 ** E.g. XOR rarely helps with pointer consts.
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
187 */
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
188 }
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
189 }
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
190 rset_clear(work, r);
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
191 }
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
192 return 0; /* Failed. */
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
193 }
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
194
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
195 static void emit_loadk(ASMState *as, Reg rd, uint64_t u64, int is64)
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
196 {
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
197 int i, zeros = 0, ones = 0, neg;
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
198 if (!is64) u64 = (int64_t)(int32_t)u64; /* Sign-extend. */
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
199 /* Count homogeneous 16 bit fragments. */
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
200 for (i = 0; i < 4; i++) {
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
201 uint64_t frag = (u64 >> i*16) & 0xffff;
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
202 zeros += (frag == 0);
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
203 ones += (frag == 0xffff);
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
204 }
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
205 neg = ones > zeros; /* Use MOVN if it pays off. */
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
206 if ((neg ? ones : zeros) < 3) { /* Need 2+ ins. Try shorter K13 encoding. */
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
207 uint32_t k13 = emit_isk13(u64, is64);
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
208 if (k13) {
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
209 emit_dn(as, (is64|A64I_ORRw)^k13, rd, RID_ZERO);
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
210 return;
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
211 }
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
212 }
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
213 if (!emit_kdelta(as, rd, u64, 4 - (neg ? ones : zeros))) {
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
214 int shift = 0, lshift = 0;
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
215 uint64_t n64 = neg ? ~u64 : u64;
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
216 if (n64 != 0) {
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
217 /* Find first/last fragment to be filled. */
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
218 shift = (63-emit_clz64(n64)) & ~15;
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
219 lshift = emit_ctz64(n64) & ~15;
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
220 }
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
221 /* MOVK requires the original value (u64). */
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
222 while (shift > lshift) {
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
223 uint32_t u16 = (u64 >> shift) & 0xffff;
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
224 /* Skip fragments that are correctly filled by MOVN/MOVZ. */
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
225 if (u16 != (neg ? 0xffff : 0))
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
226 emit_d(as, is64 | A64I_MOVKw | A64F_U16(u16) | A64F_LSL16(shift), rd);
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
227 shift -= 16;
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
228 }
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
229 /* But MOVN needs an inverted value (n64). */
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
230 emit_d(as, (neg ? A64I_MOVNx : A64I_MOVZx) |
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
231 A64F_U16((n64 >> lshift) & 0xffff) | A64F_LSL16(lshift), rd);
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
232 }
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
233 }
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
234
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
235 /* Load a 32 bit constant into a GPR. */
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
236 #define emit_loadi(as, rd, i) emit_loadk(as, rd, i, 0)
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
237
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
238 /* Load a 64 bit constant into a GPR. */
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
239 #define emit_loadu64(as, rd, i) emit_loadk(as, rd, i, A64I_X)
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
240
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
241 #define emit_loada(as, r, addr) emit_loadu64(as, (r), (uintptr_t)(addr))
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
242
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
243 #define glofs(as, k) \
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
244 ((intptr_t)((uintptr_t)(k) - (uintptr_t)&J2GG(as->J)->g))
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
245 #define mcpofs(as, k) \
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
246 ((intptr_t)((uintptr_t)(k) - (uintptr_t)(as->mcp - 1)))
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
247 #define checkmcpofs(as, k) \
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
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248 (A64F_S_OK(mcpofs(as, k)>>2, 19))
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249
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250 static Reg ra_allock(ASMState *as, intptr_t k, RegSet allow);
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251
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252 /* Get/set from constant pointer. */
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253 static void emit_lsptr(ASMState *as, A64Ins ai, Reg r, void *p)
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254 {
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255 /* First, check if ip + offset is in range. */
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256 if ((ai & 0x00400000) && checkmcpofs(as, p)) {
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257 emit_d(as, A64I_LDRLx | A64F_S19(mcpofs(as, p)>>2), r);
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258 } else {
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259 Reg base = RID_GL; /* Next, try GL + offset. */
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
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260 int64_t ofs = glofs(as, p);
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261 if (!emit_checkofs(ai, ofs)) { /* Else split up into base reg + offset. */
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262 int64_t i64 = i64ptr(p);
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263 base = ra_allock(as, (i64 & ~0x7fffull), rset_exclude(RSET_GPR, r));
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264 ofs = i64 & 0x7fffull;
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265 }
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266 emit_lso(as, ai, r, base, ofs);
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267 }
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268 }
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269
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270 /* Load 64 bit IR constant into register. */
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271 static void emit_loadk64(ASMState *as, Reg r, IRIns *ir)
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272 {
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273 const uint64_t *k = &ir_k64(ir)->u64;
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274 int64_t ofs;
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275 if (r >= RID_MAX_GPR) {
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276 uint32_t fpk = emit_isfpk64(*k);
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277 if (fpk != ~0u) {
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278 emit_d(as, A64I_FMOV_DI | A64F_FP8(fpk), (r & 31));
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279 return;
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280 }
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281 }
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282 ofs = glofs(as, k);
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283 if (emit_checkofs(A64I_LDRx, ofs)) {
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284 emit_lso(as, r >= RID_MAX_GPR ? A64I_LDRd : A64I_LDRx,
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285 (r & 31), RID_GL, ofs);
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286 } else {
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287 if (r >= RID_MAX_GPR) {
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288 emit_dn(as, A64I_FMOV_D_R, (r & 31), RID_TMP);
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289 r = RID_TMP;
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290 }
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291 if (checkmcpofs(as, k))
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292 emit_d(as, A64I_LDRLx | A64F_S19(mcpofs(as, k)>>2), r);
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293 else
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diff changeset
294 emit_loadu64(as, r, *k);
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295 }
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296 }
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297
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298 /* Get/set global_State fields. */
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diff changeset
299 #define emit_getgl(as, r, field) \
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300 emit_lsptr(as, A64I_LDRx, (r), (void *)&J2G(as->J)->field)
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301 #define emit_setgl(as, r, field) \
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diff changeset
302 emit_lsptr(as, A64I_STRx, (r), (void *)&J2G(as->J)->field)
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303
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304 /* Trace number is determined from pc of exit instruction. */
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305 #define emit_setvmstate(as, i) UNUSED(i)
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306
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diff changeset
307 /* -- Emit control-flow instructions -------------------------------------- */
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308
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diff changeset
309 /* Label for internal jumps. */
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diff changeset
310 typedef MCode *MCLabel;
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311
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312 /* Return label pointing to current PC. */
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313 #define emit_label(as) ((as)->mcp)
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314
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315 static void emit_cond_branch(ASMState *as, A64CC cond, MCode *target)
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316 {
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317 MCode *p = --as->mcp;
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318 ptrdiff_t delta = target - p;
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diff changeset
319 lj_assertA(A64F_S_OK(delta, 19), "branch target out of range");
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320 *p = A64I_BCC | A64F_S19(delta) | cond;
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diff changeset
321 }
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diff changeset
322
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
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diff changeset
323 static void emit_branch(ASMState *as, A64Ins ai, MCode *target)
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diff changeset
324 {
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diff changeset
325 MCode *p = --as->mcp;
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diff changeset
326 ptrdiff_t delta = target - p;
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diff changeset
327 lj_assertA(A64F_S_OK(delta, 26), "branch target out of range");
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
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328 *p = ai | A64F_S26(delta);
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329 }
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
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diff changeset
330
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331 static void emit_tnb(ASMState *as, A64Ins ai, Reg r, uint32_t bit, MCode *target)
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diff changeset
332 {
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333 MCode *p = --as->mcp;
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334 ptrdiff_t delta = target - p;
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diff changeset
335 lj_assertA(bit < 63, "bit number out of range");
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
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diff changeset
336 lj_assertA(A64F_S_OK(delta, 14), "branch target out of range");
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diff changeset
337 if (bit > 31) ai |= A64I_X;
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
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338 *p = ai | A64F_BIT(bit & 31) | A64F_S14(delta) | r;
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339 }
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
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diff changeset
340
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
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diff changeset
341 static void emit_cnb(ASMState *as, A64Ins ai, Reg r, MCode *target)
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diff changeset
342 {
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343 MCode *p = --as->mcp;
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diff changeset
344 ptrdiff_t delta = target - p;
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diff changeset
345 lj_assertA(A64F_S_OK(delta, 19), "branch target out of range");
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346 *p = ai | A64F_S19(delta) | r;
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diff changeset
347 }
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diff changeset
348
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diff changeset
349 #define emit_jmp(as, target) emit_branch(as, A64I_B, (target))
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diff changeset
350
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diff changeset
351 static void emit_call(ASMState *as, ASMFunction target)
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352 {
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diff changeset
353 MCode *p = --as->mcp;
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diff changeset
354 #if LJ_ABI_PAUTH
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diff changeset
355 char *targetp = ptrauth_auth_data((char *)target,
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
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diff changeset
356 ptrauth_key_function_pointer, 0);
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diff changeset
357 #else
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diff changeset
358 char *targetp = (char *)target;
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diff changeset
359 #endif
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diff changeset
360 ptrdiff_t delta = targetp - (char *)p;
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diff changeset
361 if (A64F_S_OK(delta>>2, 26)) {
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diff changeset
362 *p = A64I_BL | A64F_S26(delta>>2);
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parents:
diff changeset
363 } else { /* Target out of range: need indirect call. But don't use R0-R7. */
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
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diff changeset
364 Reg r = ra_allock(as, i64ptr(target),
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
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diff changeset
365 RSET_RANGE(RID_X8, RID_MAX_GPR)-RSET_FIXED);
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diff changeset
366 *p = A64I_BLR_AUTH | A64F_N(r);
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parents:
diff changeset
367 }
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parents:
diff changeset
368 }
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
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parents:
diff changeset
369
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
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parents:
diff changeset
370 /* -- Emit generic operations --------------------------------------------- */
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diff changeset
371
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parents:
diff changeset
372 /* Generic move between two regs. */
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MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
373 static void emit_movrr(ASMState *as, IRIns *ir, Reg dst, Reg src)
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
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374 {
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375 if (dst >= RID_MAX_GPR) {
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
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376 emit_dn(as, irt_isnum(ir->t) ? A64I_FMOV_D : A64I_FMOV_S,
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377 (dst & 31), (src & 31));
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378 return;
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379 }
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380 if (as->mcp != as->mcloop) { /* Swap early registers for loads/stores. */
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
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381 MCode ins = *as->mcp, swp = (src^dst);
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
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382 if ((ins & 0xbf800000) == 0xb9000000) {
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
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383 if (!((ins ^ (dst << 5)) & 0x000003e0))
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
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384 *as->mcp = ins ^ (swp << 5); /* Swap N in load/store. */
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
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385 if (!(ins & 0x00400000) && !((ins ^ dst) & 0x0000001f))
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386 *as->mcp = ins ^ swp; /* Swap D in store. */
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387 }
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388 }
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389 emit_dm(as, A64I_MOVx, dst, src);
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390 }
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391
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392 /* Generic load of register with base and (small) offset address. */
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393 static void emit_loadofs(ASMState *as, IRIns *ir, Reg r, Reg base, int32_t ofs)
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394 {
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395 if (r >= RID_MAX_GPR)
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396 emit_lso(as, irt_isnum(ir->t) ? A64I_LDRd : A64I_LDRs, (r & 31), base, ofs);
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397 else
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398 emit_lso(as, irt_is64(ir->t) ? A64I_LDRx : A64I_LDRw, r, base, ofs);
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399 }
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400
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401 /* Generic store of register with base and (small) offset address. */
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402 static void emit_storeofs(ASMState *as, IRIns *ir, Reg r, Reg base, int32_t ofs)
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403 {
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404 if (r >= RID_MAX_GPR)
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405 emit_lso(as, irt_isnum(ir->t) ? A64I_STRd : A64I_STRs, (r & 31), base, ofs);
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406 else
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407 emit_lso(as, irt_is64(ir->t) ? A64I_STRx : A64I_STRw, r, base, ofs);
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408 }
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409
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
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410 /* Emit an arithmetic operation with a constant operand. */
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411 static void emit_opk(ASMState *as, A64Ins ai, Reg dest, Reg src,
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
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412 int32_t i, RegSet allow)
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413 {
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414 uint32_t k = emit_isk12(i);
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
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415 if (k)
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416 emit_dn(as, ai^k, dest, src);
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417 else
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418 emit_dnm(as, ai, dest, src, ra_allock(as, i, allow));
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419 }
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420
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421 /* Add offset to pointer. */
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422 static void emit_addptr(ASMState *as, Reg r, int32_t ofs)
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
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423 {
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424 if (ofs)
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425 emit_opk(as, ofs < 0 ? A64I_SUBx : A64I_ADDx, r, r,
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426 ofs < 0 ? (int32_t)(~(uint32_t)ofs+1u) : ofs,
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
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427 rset_exclude(RSET_GPR, r));
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428 }
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429
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430 #define emit_spsub(as, ofs) emit_addptr(as, RID_SP, -(ofs))
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431