annotate third_party/luajit/src/lj_emit_mips.h @ 206:240337164a80

[Seobeo] SSL should be used for large file as well lol.
author MrJuneJune <me@mrjunejune.com>
date Sun, 15 Feb 2026 11:41:53 -0800
parents 94705b5986b3
children
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178
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1 /*
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2 ** MIPS 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
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6 #if LJ_64
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7 static intptr_t get_k64val(ASMState *as, IRRef ref)
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8 {
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9 IRIns *ir = IR(ref);
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10 if (ir->o == IR_KINT64) {
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11 return (intptr_t)ir_kint64(ir)->u64;
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12 } else if (ir->o == IR_KGC) {
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13 return (intptr_t)ir_kgc(ir);
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14 } else if (ir->o == IR_KPTR || ir->o == IR_KKPTR) {
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15 return (intptr_t)ir_kptr(ir);
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16 } else if (LJ_SOFTFP && ir->o == IR_KNUM) {
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17 return (intptr_t)ir_knum(ir)->u64;
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18 } else {
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19 lj_assertA(ir->o == IR_KINT || ir->o == IR_KNULL,
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20 "bad 64 bit const IR op %d", ir->o);
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21 return ir->i; /* Sign-extended. */
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22 }
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23 }
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24 #endif
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25
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26 #if LJ_64
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27 #define get_kval(as, ref) get_k64val(as, ref)
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28 #else
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29 #define get_kval(as, ref) (IR((ref))->i)
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30 #endif
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31
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32 /* -- Emit basic instructions --------------------------------------------- */
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33
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34 static void emit_dst(ASMState *as, MIPSIns mi, Reg rd, Reg rs, Reg rt)
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35 {
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36 *--as->mcp = mi | MIPSF_D(rd) | MIPSF_S(rs) | MIPSF_T(rt);
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37 }
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38
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39 static void emit_dta(ASMState *as, MIPSIns mi, Reg rd, Reg rt, uint32_t a)
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40 {
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41 *--as->mcp = mi | MIPSF_D(rd) | MIPSF_T(rt) | MIPSF_A(a);
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42 }
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43
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44 #define emit_ds(as, mi, rd, rs) emit_dst(as, (mi), (rd), (rs), 0)
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45 #define emit_tg(as, mi, rt, rg) emit_dst(as, (mi), (rg)&31, 0, (rt))
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46
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47 static void emit_tsi(ASMState *as, MIPSIns mi, Reg rt, Reg rs, int32_t i)
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48 {
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49 *--as->mcp = mi | MIPSF_T(rt) | MIPSF_S(rs) | (i & 0xffff);
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50 }
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51
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52 #define emit_ti(as, mi, rt, i) emit_tsi(as, (mi), (rt), 0, (i))
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53 #define emit_hsi(as, mi, rh, rs, i) emit_tsi(as, (mi), (rh) & 31, (rs), (i))
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54
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55 static void emit_fgh(ASMState *as, MIPSIns mi, Reg rf, Reg rg, Reg rh)
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56 {
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57 *--as->mcp = mi | MIPSF_F(rf&31) | MIPSF_G(rg&31) | MIPSF_H(rh&31);
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58 }
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59
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60 #define emit_fg(as, mi, rf, rg) emit_fgh(as, (mi), (rf), (rg), 0)
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61
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62 static void emit_rotr(ASMState *as, Reg dest, Reg src, Reg tmp, uint32_t shift)
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63 {
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64 if (LJ_64 || (as->flags & JIT_F_MIPSXXR2)) {
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65 emit_dta(as, MIPSI_ROTR, dest, src, shift);
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66 } else {
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67 emit_dst(as, MIPSI_OR, dest, dest, tmp);
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68 emit_dta(as, MIPSI_SLL, dest, src, (-shift)&31);
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69 emit_dta(as, MIPSI_SRL, tmp, src, shift);
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70 }
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71 }
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72
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73 #if LJ_64 || LJ_HASBUFFER
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74 static void emit_tsml(ASMState *as, MIPSIns mi, Reg rt, Reg rs, uint32_t msb,
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75 uint32_t lsb)
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76 {
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77 *--as->mcp = mi | MIPSF_T(rt) | MIPSF_S(rs) | MIPSF_M(msb) | MIPSF_L(lsb);
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78 }
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79 #endif
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80
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81 /* -- Emit loads/stores --------------------------------------------------- */
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82
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83 /* Prefer rematerialization of BASE/L from global_State over spills. */
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84 #define emit_canremat(ref) ((ref) <= REF_BASE)
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85
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86 /* Try to find a one step delta relative to another constant. */
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87 static int emit_kdelta1(ASMState *as, Reg rd, intptr_t i)
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88 {
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89 RegSet work = ~as->freeset & RSET_GPR;
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90 while (work) {
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91 Reg r = rset_picktop(work);
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92 IRRef ref = regcost_ref(as->cost[r]);
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93 lj_assertA(r != rd, "dest reg %d not free", rd);
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94 if (ref < ASMREF_L) {
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95 intptr_t delta = (intptr_t)((uintptr_t)i -
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96 (uintptr_t)(ra_iskref(ref) ? ra_krefk(as, ref) : get_kval(as, ref)));
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97 if (checki16(delta)) {
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98 emit_tsi(as, MIPSI_AADDIU, rd, r, delta);
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99 return 1;
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100 }
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101 }
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102 rset_clear(work, r);
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103 }
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104 return 0; /* Failed. */
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105 }
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106
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107 /* Load a 32 bit constant into a GPR. */
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108 static void emit_loadi(ASMState *as, Reg r, int32_t i)
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109 {
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110 if (checki16(i)) {
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111 emit_ti(as, MIPSI_LI, r, i);
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112 } else {
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113 if ((i & 0xffff)) {
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114 intptr_t jgl = (intptr_t)(void *)J2G(as->J);
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115 if ((uintptr_t)(i-jgl) < 65536) {
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116 emit_tsi(as, MIPSI_ADDIU, r, RID_JGL, i-jgl-32768);
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117 return;
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118 } else if (emit_kdelta1(as, r, i)) {
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119 return;
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120 } else if ((i >> 16) == 0) {
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121 emit_tsi(as, MIPSI_ORI, r, RID_ZERO, i);
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122 return;
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123 }
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124 emit_tsi(as, MIPSI_ORI, r, r, i);
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parents:
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125 }
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diff changeset
126 emit_ti(as, MIPSI_LUI, r, (i >> 16));
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127 }
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MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
128 }
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
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diff changeset
129
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MrJuneJune <me@mrjunejune.com>
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diff changeset
130 #if LJ_64
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
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diff changeset
131 /* Load a 64 bit constant into a GPR. */
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
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132 static void emit_loadu64(ASMState *as, Reg r, uint64_t u64)
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133 {
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
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134 if (checki32((int64_t)u64)) {
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
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135 emit_loadi(as, r, (int32_t)u64);
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
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diff changeset
136 } else {
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
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diff changeset
137 uint64_t delta = u64 - (uint64_t)(void *)J2G(as->J);
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
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diff changeset
138 if (delta < 65536) {
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
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diff changeset
139 emit_tsi(as, MIPSI_DADDIU, r, RID_JGL, (int32_t)(delta-32768));
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140 } else if (emit_kdelta1(as, r, (intptr_t)u64)) {
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diff changeset
141 return;
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MrJuneJune <me@mrjunejune.com>
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diff changeset
142 } else {
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diff changeset
143 /* TODO MIPSR6: Use DAHI & DATI. Caveat: sign-extension. */
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
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diff changeset
144 if ((u64 & 0xffff)) {
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
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diff changeset
145 emit_tsi(as, MIPSI_ORI, r, r, u64 & 0xffff);
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146 }
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MrJuneJune <me@mrjunejune.com>
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diff changeset
147 if (((u64 >> 16) & 0xffff)) {
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
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148 emit_dta(as, MIPSI_DSLL, r, r, 16);
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
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149 emit_tsi(as, MIPSI_ORI, r, r, (u64 >> 16) & 0xffff);
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
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150 emit_dta(as, MIPSI_DSLL, r, r, 16);
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151 } else {
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152 emit_dta(as, MIPSI_DSLL32, r, r, 0);
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153 }
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154 emit_loadi(as, r, (int32_t)(u64 >> 32));
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MrJuneJune <me@mrjunejune.com>
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155 }
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MrJuneJune <me@mrjunejune.com>
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diff changeset
156 /* TODO: There are probably more optimization opportunities. */
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MrJuneJune <me@mrjunejune.com>
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157 }
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MrJuneJune <me@mrjunejune.com>
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158 }
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MrJuneJune <me@mrjunejune.com>
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159
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MrJuneJune <me@mrjunejune.com>
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diff changeset
160 #define emit_loada(as, r, addr) emit_loadu64(as, (r), u64ptr((addr)))
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MrJuneJune <me@mrjunejune.com>
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161 #else
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MrJuneJune <me@mrjunejune.com>
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diff changeset
162 #define emit_loada(as, r, addr) emit_loadi(as, (r), i32ptr((addr)))
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MrJuneJune <me@mrjunejune.com>
parents:
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163 #endif
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
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diff changeset
164
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MrJuneJune <me@mrjunejune.com>
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diff changeset
165 static Reg ra_allock(ASMState *as, intptr_t k, RegSet allow);
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
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166 static void ra_allockreg(ASMState *as, intptr_t k, Reg r);
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MrJuneJune <me@mrjunejune.com>
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167
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
168 /* Get/set from constant pointer. */
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
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diff changeset
169 static void emit_lsptr(ASMState *as, MIPSIns mi, Reg r, void *p, RegSet allow)
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
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170 {
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diff changeset
171 intptr_t jgl = (intptr_t)(J2G(as->J));
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
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diff changeset
172 intptr_t i = (intptr_t)(p);
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
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diff changeset
173 Reg base;
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
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diff changeset
174 if ((uint32_t)(i-jgl) < 65536) {
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
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diff changeset
175 i = i-jgl-32768;
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
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diff changeset
176 base = RID_JGL;
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
177 } else {
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
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parents:
diff changeset
178 base = ra_allock(as, i-(int16_t)i, allow);
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
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parents:
diff changeset
179 }
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
180 emit_tsi(as, mi, r, base, i);
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parents:
diff changeset
181 }
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diff changeset
182
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
183 #if LJ_64
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
184 static void emit_loadk64(ASMState *as, Reg r, IRIns *ir)
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
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diff changeset
185 {
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diff changeset
186 const uint64_t *k = &ir_k64(ir)->u64;
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diff changeset
187 Reg r64 = r;
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diff changeset
188 if (rset_test(RSET_FPR, r)) {
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
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diff changeset
189 r64 = RID_TMP;
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MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
190 emit_tg(as, MIPSI_DMTC1, r64, r);
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diff changeset
191 }
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diff changeset
192 if ((uint32_t)((intptr_t)k-(intptr_t)J2G(as->J)) < 65536)
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
193 emit_lsptr(as, MIPSI_LD, r64, (void *)k, 0);
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
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diff changeset
194 else
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
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diff changeset
195 emit_loadu64(as, r64, *k);
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diff changeset
196 }
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MrJuneJune <me@mrjunejune.com>
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diff changeset
197 #else
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MrJuneJune <me@mrjunejune.com>
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diff changeset
198 #define emit_loadk64(as, r, ir) \
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
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diff changeset
199 emit_lsptr(as, MIPSI_LDC1, ((r) & 31), (void *)&ir_knum((ir))->u64, RSET_GPR)
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
200 #endif
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
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parents:
diff changeset
201
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
202 /* Get/set global_State fields. */
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
203 static void emit_lsglptr(ASMState *as, MIPSIns mi, Reg r, int32_t ofs)
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 emit_tsi(as, mi, r, RID_JGL, ofs-32768);
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MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
206 }
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
207
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
208 #define emit_getgl(as, r, field) \
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
209 emit_lsglptr(as, MIPSI_AL, (r), (int32_t)offsetof(global_State, field))
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
210 #define emit_setgl(as, r, field) \
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
211 emit_lsglptr(as, MIPSI_AS, (r), (int32_t)offsetof(global_State, field))
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 /* Trace number is determined from per-trace exit stubs. */
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
214 #define emit_setvmstate(as, i) UNUSED(i)
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
215
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
216 /* -- Emit control-flow instructions -------------------------------------- */
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
217
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
218 /* Label for internal jumps. */
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MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
219 typedef MCode *MCLabel;
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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 /* Return label pointing to current PC. */
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
222 #define emit_label(as) ((as)->mcp)
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
223
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
224 static void emit_branch(ASMState *as, MIPSIns mi, Reg rs, Reg rt, MCode *target)
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
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parents:
diff changeset
225 {
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MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
226 MCode *p = as->mcp;
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MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
227 ptrdiff_t delta = target - p;
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
228 lj_assertA(((delta + 0x8000) >> 16) == 0, "branch target out of range");
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
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parents:
diff changeset
229 *--p = mi | MIPSF_S(rs) | MIPSF_T(rt) | ((uint32_t)delta & 0xffffu);
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
230 as->mcp = p;
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MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
231 }
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 static void emit_jmp(ASMState *as, MCode *target)
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 *--as->mcp = MIPSI_NOP;
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
236 emit_branch(as, MIPSI_B, RID_ZERO, RID_ZERO, (target));
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
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
239 static void emit_call(ASMState *as, void *target, int needcfa)
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 MCode *p = as->mcp;
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
242 #if LJ_TARGET_MIPSR6
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
243 ptrdiff_t delta = (char *)target - (char *)p;
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
244 if ((((delta>>2) + 0x02000000) >> 26) == 0) { /* Try compact call first. */
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
245 *--p = MIPSI_BALC | (((uintptr_t)delta >>2) & 0x03ffffffu);
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
246 as->mcp = p;
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MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
247 return;
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
248 }
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
249 #endif
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
250 *--p = MIPSI_NOP; /* Delay slot. */
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
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251 if ((((uintptr_t)target ^ (uintptr_t)p) >> 28) == 0) {
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252 #if !LJ_TARGET_MIPSR6
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253 *--p = (((uintptr_t)target & 1) ? MIPSI_JALX : MIPSI_JAL) |
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254 (((uintptr_t)target >>2) & 0x03ffffffu);
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255 #else
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256 *--p = MIPSI_JAL | (((uintptr_t)target >>2) & 0x03ffffffu);
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257 #endif
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258 } else { /* Target out of range: need indirect call. */
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259 *--p = MIPSI_JALR | MIPSF_S(RID_CFUNCADDR);
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260 needcfa = 1;
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261 }
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262 as->mcp = p;
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263 if (needcfa) ra_allockreg(as, (intptr_t)target, RID_CFUNCADDR);
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264 }
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265
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266 /* -- Emit generic operations --------------------------------------------- */
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267
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268 #define emit_move(as, dst, src) \
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269 emit_ds(as, MIPSI_MOVE, (dst), (src))
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270
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271 /* Generic move between two regs. */
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272 static void emit_movrr(ASMState *as, IRIns *ir, Reg dst, Reg src)
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273 {
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274 if (dst < RID_MAX_GPR)
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275 emit_move(as, dst, src);
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276 else
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277 emit_fg(as, irt_isnum(ir->t) ? MIPSI_MOV_D : MIPSI_MOV_S, dst, src);
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278 }
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279
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280 /* Generic load of register with base and (small) offset address. */
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281 static void emit_loadofs(ASMState *as, IRIns *ir, Reg r, Reg base, int32_t ofs)
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282 {
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283 if (r < RID_MAX_GPR)
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284 emit_tsi(as, irt_is64(ir->t) ? MIPSI_LD : MIPSI_LW, r, base, ofs);
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285 else
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286 emit_tsi(as, irt_isnum(ir->t) ? MIPSI_LDC1 : MIPSI_LWC1,
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287 (r & 31), base, ofs);
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288 }
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289
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290 /* Generic store of register with base and (small) offset address. */
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291 static void emit_storeofs(ASMState *as, IRIns *ir, Reg r, Reg base, int32_t ofs)
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292 {
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293 if (r < RID_MAX_GPR)
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294 emit_tsi(as, irt_is64(ir->t) ? MIPSI_SD : MIPSI_SW, r, base, ofs);
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295 else
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296 emit_tsi(as, irt_isnum(ir->t) ? MIPSI_SDC1 : MIPSI_SWC1,
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297 (r&31), base, ofs);
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298 }
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299
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300 /* Add offset to pointer. */
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301 static void emit_addptr(ASMState *as, Reg r, int32_t ofs)
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302 {
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303 if (ofs) {
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304 lj_assertA(checki16(ofs), "offset %d out of range", ofs);
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305 emit_tsi(as, MIPSI_AADDIU, r, r, ofs);
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306 }
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307 }
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308
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309 #define emit_spsub(as, ofs) emit_addptr(as, RID_SP, -(ofs))
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310