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annotate third_party/luajit/src/lj_emit_ppc.h @ 198:008ca7780c8a

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S3 upload got it to work.
author MrJuneJune <me@mrjunejune.com>
date Sat, 14 Feb 2026 16:18:14 -0800
parents 94705b5986b3
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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178
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1 /*
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2 ** PPC 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 /* -- Emit basic instructions --------------------------------------------- */
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7
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8 static void emit_tab(ASMState *as, PPCIns pi, Reg rt, Reg ra, Reg rb)
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9 {
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10 *--as->mcp = pi | PPCF_T(rt) | PPCF_A(ra) | PPCF_B(rb);
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11 }
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12
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13 #define emit_asb(as, pi, ra, rs, rb) emit_tab(as, (pi), (rs), (ra), (rb))
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14 #define emit_as(as, pi, ra, rs) emit_tab(as, (pi), (rs), (ra), 0)
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15 #define emit_ab(as, pi, ra, rb) emit_tab(as, (pi), 0, (ra), (rb))
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16
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17 static void emit_tai(ASMState *as, PPCIns pi, Reg rt, Reg ra, int32_t i)
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18 {
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19 *--as->mcp = pi | PPCF_T(rt) | PPCF_A(ra) | (i & 0xffff);
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20 }
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21
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22 #define emit_ti(as, pi, rt, i) emit_tai(as, (pi), (rt), 0, (i))
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23 #define emit_ai(as, pi, ra, i) emit_tai(as, (pi), 0, (ra), (i))
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24 #define emit_asi(as, pi, ra, rs, i) emit_tai(as, (pi), (rs), (ra), (i))
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25
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26 #define emit_fab(as, pi, rf, ra, rb) \
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27 emit_tab(as, (pi), (rf)&31, (ra)&31, (rb)&31)
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28 #define emit_fb(as, pi, rf, rb) emit_tab(as, (pi), (rf)&31, 0, (rb)&31)
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29 #define emit_fac(as, pi, rf, ra, rc) \
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30 emit_tab(as, (pi) | PPCF_C((rc) & 31), (rf)&31, (ra)&31, 0)
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31 #define emit_facb(as, pi, rf, ra, rc, rb) \
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32 emit_tab(as, (pi) | PPCF_C((rc) & 31), (rf)&31, (ra)&31, (rb)&31)
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33 #define emit_fai(as, pi, rf, ra, i) emit_tai(as, (pi), (rf)&31, (ra), (i))
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34
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35 static void emit_rot(ASMState *as, PPCIns pi, Reg ra, Reg rs,
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36 int32_t n, int32_t b, int32_t e)
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37 {
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38 *--as->mcp = pi | PPCF_T(rs) | PPCF_A(ra) | PPCF_B(n) |
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39 PPCF_MB(b) | PPCF_ME(e);
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40 }
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41
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42 static void emit_slwi(ASMState *as, Reg ra, Reg rs, int32_t n)
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43 {
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44 lj_assertA(n >= 0 && n < 32, "shift out or range");
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45 emit_rot(as, PPCI_RLWINM, ra, rs, n, 0, 31-n);
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46 }
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47
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48 static void emit_rotlwi(ASMState *as, Reg ra, Reg rs, int32_t n)
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49 {
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50 lj_assertA(n >= 0 && n < 32, "shift out or range");
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51 emit_rot(as, PPCI_RLWINM, ra, rs, n, 0, 31);
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52 }
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53
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54 /* -- Emit loads/stores --------------------------------------------------- */
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55
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56 /* Prefer rematerialization of BASE/L from global_State over spills. */
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57 #define emit_canremat(ref) ((ref) <= REF_BASE)
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58
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59 /* Try to find a one step delta relative to another constant. */
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60 static int emit_kdelta1(ASMState *as, Reg rd, int32_t i)
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61 {
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62 RegSet work = ~as->freeset & RSET_GPR;
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63 while (work) {
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64 Reg r = rset_picktop(work);
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65 IRRef ref = regcost_ref(as->cost[r]);
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66 lj_assertA(r != rd, "dest reg %d not free", rd);
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67 if (ref < ASMREF_L) {
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68 int32_t delta = i - (ra_iskref(ref) ? ra_krefk(as, ref) : IR(ref)->i);
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69 if (checki16(delta)) {
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70 emit_tai(as, PPCI_ADDI, rd, r, delta);
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71 return 1;
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72 }
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73 }
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74 rset_clear(work, r);
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75 }
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76 return 0; /* Failed. */
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77 }
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78
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79 /* Load a 32 bit constant into a GPR. */
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80 static void emit_loadi(ASMState *as, Reg r, int32_t i)
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81 {
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82 if (checki16(i)) {
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83 emit_ti(as, PPCI_LI, r, i);
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84 } else {
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85 if ((i & 0xffff)) {
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86 int32_t jgl = i32ptr(J2G(as->J));
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87 if ((uint32_t)(i-jgl) < 65536) {
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88 emit_tai(as, PPCI_ADDI, r, RID_JGL, i-jgl-32768);
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89 return;
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90 } else if (emit_kdelta1(as, r, i)) {
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91 return;
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92 }
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93 emit_asi(as, PPCI_ORI, r, r, i);
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94 }
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95 emit_ti(as, PPCI_LIS, r, (i >> 16));
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96 }
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97 }
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98
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99 #define emit_loada(as, r, addr) emit_loadi(as, (r), i32ptr((addr)))
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100
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101 static Reg ra_allock(ASMState *as, intptr_t k, RegSet allow);
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102
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103 /* Get/set from constant pointer. */
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104 static void emit_lsptr(ASMState *as, PPCIns pi, Reg r, void *p, RegSet allow)
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105 {
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106 int32_t jgl = i32ptr(J2G(as->J));
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107 int32_t i = i32ptr(p);
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108 Reg base;
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109 if ((uint32_t)(i-jgl) < 65536) {
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110 i = i-jgl-32768;
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111 base = RID_JGL;
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112 } else {
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113 base = ra_allock(as, i-(int16_t)i, allow);
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114 }
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115 emit_tai(as, pi, r, base, i);
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116 }
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117
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118 #define emit_loadk64(as, r, ir) \
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119 emit_lsptr(as, PPCI_LFD, ((r) & 31), (void *)&ir_knum((ir))->u64, RSET_GPR)
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120
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121 /* Get/set global_State fields. */
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122 static void emit_lsglptr(ASMState *as, PPCIns pi, Reg r, int32_t ofs)
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123 {
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
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124 emit_tai(as, pi, r, RID_JGL, ofs-32768);
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125 }
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parents:
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126
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
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127 #define emit_getgl(as, r, field) \
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
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128 emit_lsglptr(as, PPCI_LWZ, (r), (int32_t)offsetof(global_State, field))
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
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129 #define emit_setgl(as, r, field) \
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
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130 emit_lsglptr(as, PPCI_STW, (r), (int32_t)offsetof(global_State, field))
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131
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132 /* Trace number is determined from per-trace exit stubs. */
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
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133 #define emit_setvmstate(as, i) UNUSED(i)
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134
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MrJuneJune <me@mrjunejune.com>
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diff changeset
135 /* -- Emit control-flow instructions -------------------------------------- */
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136
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137 /* Label for internal jumps. */
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138 typedef MCode *MCLabel;
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139
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140 /* Return label pointing to current PC. */
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141 #define emit_label(as) ((as)->mcp)
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142
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143 static void emit_condbranch(ASMState *as, PPCIns pi, PPCCC cc, MCode *target)
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144 {
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145 MCode *p = --as->mcp;
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146 ptrdiff_t delta = (char *)target - (char *)p;
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147 lj_assertA(((delta + 0x8000) >> 16) == 0, "branch target out of range");
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148 pi ^= (delta & 0x8000) * (PPCF_Y/0x8000);
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149 *p = pi | PPCF_CC(cc) | ((uint32_t)delta & 0xffffu);
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150 }
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151
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MrJuneJune <me@mrjunejune.com>
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152 static void emit_jmp(ASMState *as, MCode *target)
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153 {
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154 MCode *p = --as->mcp;
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155 ptrdiff_t delta = (char *)target - (char *)p;
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156 *p = PPCI_B | (delta & 0x03fffffcu);
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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 static void emit_call(ASMState *as, void *target)
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160 {
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MrJuneJune <me@mrjunejune.com>
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161 MCode *p = --as->mcp;
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162 ptrdiff_t delta = (char *)target - (char *)p;
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
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163 if ((((delta>>2) + 0x00800000) >> 24) == 0) {
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
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164 *p = PPCI_BL | (delta & 0x03fffffcu);
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165 } else { /* Target out of range: need indirect call. Don't use arg reg. */
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166 RegSet allow = RSET_GPR & ~RSET_RANGE(RID_R0, REGARG_LASTGPR+1);
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
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167 Reg r = ra_allock(as, i32ptr(target), allow);
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168 *p = PPCI_BCTRL;
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169 p[-1] = PPCI_MTCTR | PPCF_T(r);
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diff changeset
170 as->mcp = p-1;
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171 }
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172 }
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173
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diff changeset
174 /* -- Emit generic operations --------------------------------------------- */
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diff changeset
175
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diff changeset
176 #define emit_mr(as, dst, src) \
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
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177 emit_asb(as, PPCI_MR, (dst), (src), (src))
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178
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179 /* Generic move between two regs. */
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diff changeset
180 static void emit_movrr(ASMState *as, IRIns *ir, Reg dst, Reg src)
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181 {
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182 UNUSED(ir);
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diff changeset
183 if (dst < RID_MAX_GPR)
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diff changeset
184 emit_mr(as, dst, src);
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diff changeset
185 else
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diff changeset
186 emit_fb(as, PPCI_FMR, dst, src);
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187 }
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188
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diff changeset
189 /* Generic load of register with base and (small) offset address. */
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190 static void emit_loadofs(ASMState *as, IRIns *ir, Reg r, Reg base, int32_t ofs)
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191 {
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diff changeset
192 if (r < RID_MAX_GPR)
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diff changeset
193 emit_tai(as, PPCI_LWZ, r, base, ofs);
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diff changeset
194 else
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diff changeset
195 emit_fai(as, irt_isnum(ir->t) ? PPCI_LFD : PPCI_LFS, r, base, ofs);
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196 }
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diff changeset
197
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diff changeset
198 /* Generic store of register with base and (small) offset address. */
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199 static void emit_storeofs(ASMState *as, IRIns *ir, Reg r, Reg base, int32_t ofs)
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diff changeset
200 {
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parents:
diff changeset
201 if (r < RID_MAX_GPR)
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
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parents:
diff changeset
202 emit_tai(as, PPCI_STW, r, base, ofs);
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
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diff changeset
203 else
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
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diff changeset
204 emit_fai(as, irt_isnum(ir->t) ? PPCI_STFD : PPCI_STFS, r, base, ofs);
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diff changeset
205 }
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
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parents:
diff changeset
206
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parents:
diff changeset
207 /* Emit a compare (for equality) with a constant operand. */
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
208 static void emit_cmpi(ASMState *as, Reg r, int32_t k)
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parents:
diff changeset
209 {
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MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
210 if (checki16(k)) {
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
211 emit_ai(as, PPCI_CMPWI, r, k);
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parents:
diff changeset
212 } else if (checku16(k)) {
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
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diff changeset
213 emit_ai(as, PPCI_CMPLWI, r, k);
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MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
214 } else {
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parents:
diff changeset
215 emit_ai(as, PPCI_CMPLWI, RID_TMP, k);
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
216 emit_asi(as, PPCI_XORIS, RID_TMP, r, (k >> 16));
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parents:
diff changeset
217 }
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parents:
diff changeset
218 }
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parents:
diff changeset
219
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MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
220 /* Add offset to pointer. */
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MrJuneJune <me@mrjunejune.com>
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diff changeset
221 static void emit_addptr(ASMState *as, Reg r, int32_t ofs)
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MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
222 {
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
223 if (ofs) {
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
224 emit_tai(as, PPCI_ADDI, r, r, ofs);
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MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
225 if (!checki16(ofs))
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MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
226 emit_tai(as, PPCI_ADDIS, r, r, (ofs + 32768) >> 16);
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diff changeset
227 }
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
228 }
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MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
229
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MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
230 static void emit_spsub(ASMState *as, int32_t ofs)
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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 if (ofs) {
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
233 emit_tai(as, PPCI_STWU, RID_TMP, RID_SP, -ofs);
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
234 emit_tai(as, PPCI_ADDI, RID_TMP, RID_SP,
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
235 CFRAME_SIZE + (as->parent ? as->parent->spadjust : 0));
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MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
236 }
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