Tristan Matthews | 0461646 | 2013-11-14 16:09:34 -0500 | [diff] [blame] | 1 | /* |
| 2 | * Stack-less Just-In-Time compiler |
| 3 | * |
| 4 | * Copyright 2009-2010 Zoltan Herczeg (hzmester@freemail.hu). All rights reserved. |
| 5 | * |
| 6 | * Redistribution and use in source and binary forms, with or without modification, are |
| 7 | * permitted provided that the following conditions are met: |
| 8 | * |
| 9 | * 1. Redistributions of source code must retain the above copyright notice, this list of |
| 10 | * conditions and the following disclaimer. |
| 11 | * |
| 12 | * 2. Redistributions in binary form must reproduce the above copyright notice, this list |
| 13 | * of conditions and the following disclaimer in the documentation and/or other materials |
| 14 | * provided with the distribution. |
| 15 | * |
| 16 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER(S) AND CONTRIBUTORS ``AS IS'' AND ANY |
| 17 | * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
| 18 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT |
| 19 | * SHALL THE COPYRIGHT HOLDER(S) OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, |
| 20 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED |
| 21 | * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR |
| 22 | * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
| 23 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN |
| 24 | * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 25 | */ |
| 26 | |
| 27 | /* ppc 32-bit arch dependent functions. */ |
| 28 | |
| 29 | static int load_immediate(struct sljit_compiler *compiler, int reg, sljit_w imm) |
| 30 | { |
| 31 | if (imm <= SIMM_MAX && imm >= SIMM_MIN) |
| 32 | return push_inst(compiler, ADDI | D(reg) | A(0) | IMM(imm)); |
| 33 | |
| 34 | FAIL_IF(push_inst(compiler, ADDIS | D(reg) | A(0) | IMM(imm >> 16))); |
| 35 | return (imm & 0xffff) ? push_inst(compiler, ORI | S(reg) | A(reg) | IMM(imm)) : SLJIT_SUCCESS; |
| 36 | } |
| 37 | |
| 38 | #define INS_CLEAR_LEFT(dst, src, from) \ |
| 39 | (RLWINM | S(src) | A(dst) | ((from) << 6) | (31 << 1)) |
| 40 | |
| 41 | static SLJIT_INLINE int emit_single_op(struct sljit_compiler *compiler, int op, int flags, |
| 42 | int dst, int src1, int src2) |
| 43 | { |
| 44 | switch (op) { |
| 45 | case SLJIT_ADD: |
| 46 | if (flags & ALT_FORM1) { |
| 47 | SLJIT_ASSERT(src2 == TMP_REG2); |
| 48 | return push_inst(compiler, ADDI | D(dst) | A(src1) | compiler->imm); |
| 49 | } |
| 50 | if (flags & ALT_FORM2) { |
| 51 | SLJIT_ASSERT(src2 == TMP_REG2); |
| 52 | return push_inst(compiler, ADDIS | D(dst) | A(src1) | compiler->imm); |
| 53 | } |
| 54 | if (flags & ALT_FORM3) { |
| 55 | SLJIT_ASSERT(src2 == TMP_REG2); |
| 56 | return push_inst(compiler, ADDIC | D(dst) | A(src1) | compiler->imm); |
| 57 | } |
| 58 | if (!(flags & ALT_SET_FLAGS)) |
| 59 | return push_inst(compiler, ADD | D(dst) | A(src1) | B(src2)); |
| 60 | return push_inst(compiler, ADDC | OERC(ALT_SET_FLAGS) | D(dst) | A(src1) | B(src2)); |
| 61 | |
| 62 | case SLJIT_ADDC: |
| 63 | if (flags & ALT_FORM1) { |
| 64 | FAIL_IF(push_inst(compiler, MFXER | S(0))); |
| 65 | FAIL_IF(push_inst(compiler, ADDE | D(dst) | A(src1) | B(src2))); |
| 66 | return push_inst(compiler, MTXER | S(0)); |
| 67 | } |
| 68 | return push_inst(compiler, ADDE | D(dst) | A(src1) | B(src2)); |
| 69 | |
| 70 | case SLJIT_SUB: |
| 71 | if (flags & ALT_FORM1) { |
| 72 | SLJIT_ASSERT(src2 == TMP_REG2); |
| 73 | return push_inst(compiler, SUBFIC | D(dst) | A(src1) | compiler->imm); |
| 74 | } |
| 75 | if (flags & ALT_FORM2) { |
| 76 | SLJIT_ASSERT(src2 == TMP_REG2); |
| 77 | return push_inst(compiler, CMPI | CRD(0) | A(src1) | compiler->imm); |
| 78 | } |
| 79 | if (flags & ALT_FORM3) { |
| 80 | SLJIT_ASSERT(src2 == TMP_REG2); |
| 81 | return push_inst(compiler, CMPLI | CRD(4) | A(src1) | compiler->imm); |
| 82 | } |
| 83 | if (flags & ALT_FORM4) |
| 84 | return push_inst(compiler, CMPL | CRD(4) | A(src1) | B(src2)); |
| 85 | if (!(flags & ALT_SET_FLAGS)) |
| 86 | return push_inst(compiler, SUBF | D(dst) | A(src2) | B(src1)); |
| 87 | if (flags & ALT_FORM5) |
| 88 | FAIL_IF(push_inst(compiler, CMPL | CRD(4) | A(src1) | B(src2))); |
| 89 | return push_inst(compiler, SUBFC | OERC(ALT_SET_FLAGS) | D(dst) | A(src2) | B(src1)); |
| 90 | |
| 91 | case SLJIT_SUBC: |
| 92 | if (flags & ALT_FORM1) { |
| 93 | FAIL_IF(push_inst(compiler, MFXER | S(0))); |
| 94 | FAIL_IF(push_inst(compiler, SUBFE | D(dst) | A(src2) | B(src1))); |
| 95 | return push_inst(compiler, MTXER | S(0)); |
| 96 | } |
| 97 | return push_inst(compiler, SUBFE | D(dst) | A(src2) | B(src1)); |
| 98 | |
| 99 | case SLJIT_MUL: |
| 100 | if (flags & ALT_FORM1) { |
| 101 | SLJIT_ASSERT(src2 == TMP_REG2); |
| 102 | return push_inst(compiler, MULLI | D(dst) | A(src1) | compiler->imm); |
| 103 | } |
| 104 | return push_inst(compiler, MULLW | OERC(flags) | D(dst) | A(src2) | B(src1)); |
| 105 | |
| 106 | case SLJIT_AND: |
| 107 | if (flags & ALT_FORM1) { |
| 108 | SLJIT_ASSERT(src2 == TMP_REG2); |
| 109 | return push_inst(compiler, ANDI | S(src1) | A(dst) | compiler->imm); |
| 110 | } |
| 111 | if (flags & ALT_FORM2) { |
| 112 | SLJIT_ASSERT(src2 == TMP_REG2); |
| 113 | return push_inst(compiler, ANDIS | S(src1) | A(dst) | compiler->imm); |
| 114 | } |
| 115 | return push_inst(compiler, AND | RC(flags) | S(src1) | A(dst) | B(src2)); |
| 116 | |
| 117 | case SLJIT_OR: |
| 118 | if (flags & ALT_FORM1) { |
| 119 | SLJIT_ASSERT(src2 == TMP_REG2); |
| 120 | return push_inst(compiler, ORI | S(src1) | A(dst) | compiler->imm); |
| 121 | } |
| 122 | if (flags & ALT_FORM2) { |
| 123 | SLJIT_ASSERT(src2 == TMP_REG2); |
| 124 | return push_inst(compiler, ORIS | S(src1) | A(dst) | compiler->imm); |
| 125 | } |
| 126 | if (flags & ALT_FORM3) { |
| 127 | SLJIT_ASSERT(src2 == TMP_REG2); |
| 128 | FAIL_IF(push_inst(compiler, ORI | S(src1) | A(dst) | IMM(compiler->imm))); |
| 129 | return push_inst(compiler, ORIS | S(dst) | A(dst) | IMM(compiler->imm >> 16)); |
| 130 | } |
| 131 | return push_inst(compiler, OR | RC(flags) | S(src1) | A(dst) | B(src2)); |
| 132 | |
| 133 | case SLJIT_XOR: |
| 134 | if (flags & ALT_FORM1) { |
| 135 | SLJIT_ASSERT(src2 == TMP_REG2); |
| 136 | return push_inst(compiler, XORI | S(src1) | A(dst) | compiler->imm); |
| 137 | } |
| 138 | if (flags & ALT_FORM2) { |
| 139 | SLJIT_ASSERT(src2 == TMP_REG2); |
| 140 | return push_inst(compiler, XORIS | S(src1) | A(dst) | compiler->imm); |
| 141 | } |
| 142 | if (flags & ALT_FORM3) { |
| 143 | SLJIT_ASSERT(src2 == TMP_REG2); |
| 144 | FAIL_IF(push_inst(compiler, XORI | S(src1) | A(dst) | IMM(compiler->imm))); |
| 145 | return push_inst(compiler, XORIS | S(dst) | A(dst) | IMM(compiler->imm >> 16)); |
| 146 | } |
| 147 | return push_inst(compiler, XOR | RC(flags) | S(src1) | A(dst) | B(src2)); |
| 148 | |
| 149 | case SLJIT_SHL: |
| 150 | if (flags & ALT_FORM1) { |
| 151 | SLJIT_ASSERT(src2 == TMP_REG2); |
| 152 | compiler->imm &= 0x1f; |
| 153 | return push_inst(compiler, RLWINM | RC(flags) | S(src1) | A(dst) | (compiler->imm << 11) | ((31 - compiler->imm) << 1)); |
| 154 | } |
| 155 | return push_inst(compiler, SLW | RC(flags) | S(src1) | A(dst) | B(src2)); |
| 156 | |
| 157 | case SLJIT_LSHR: |
| 158 | if (flags & ALT_FORM1) { |
| 159 | SLJIT_ASSERT(src2 == TMP_REG2); |
| 160 | compiler->imm &= 0x1f; |
| 161 | return push_inst(compiler, RLWINM | RC(flags) | S(src1) | A(dst) | (((32 - compiler->imm) & 0x1f) << 11) | (compiler->imm << 6) | (31 << 1)); |
| 162 | } |
| 163 | return push_inst(compiler, SRW | RC(flags) | S(src1) | A(dst) | B(src2)); |
| 164 | |
| 165 | case SLJIT_ASHR: |
| 166 | if (flags & ALT_FORM1) { |
| 167 | SLJIT_ASSERT(src2 == TMP_REG2); |
| 168 | compiler->imm &= 0x1f; |
| 169 | return push_inst(compiler, SRAWI | RC(flags) | S(src1) | A(dst) | (compiler->imm << 11)); |
| 170 | } |
| 171 | return push_inst(compiler, SRAW | RC(flags) | S(src1) | A(dst) | B(src2)); |
| 172 | |
| 173 | case SLJIT_MOV: |
| 174 | case SLJIT_MOV_UI: |
| 175 | case SLJIT_MOV_SI: |
| 176 | SLJIT_ASSERT(src1 == TMP_REG1); |
| 177 | if (dst != src2) |
| 178 | return push_inst(compiler, OR | S(src2) | A(dst) | B(src2)); |
| 179 | return SLJIT_SUCCESS; |
| 180 | |
| 181 | case SLJIT_MOV_UB: |
| 182 | case SLJIT_MOV_SB: |
| 183 | SLJIT_ASSERT(src1 == TMP_REG1); |
| 184 | if ((flags & (REG_DEST | REG2_SOURCE)) == (REG_DEST | REG2_SOURCE)) { |
| 185 | if (op == SLJIT_MOV_SB) |
| 186 | return push_inst(compiler, EXTSB | S(src2) | A(dst)); |
| 187 | return push_inst(compiler, INS_CLEAR_LEFT(dst, src2, 24)); |
| 188 | } |
| 189 | else if ((flags & REG_DEST) && op == SLJIT_MOV_SB) |
| 190 | return push_inst(compiler, EXTSB | S(src2) | A(dst)); |
| 191 | else if (dst != src2) |
| 192 | SLJIT_ASSERT_STOP(); |
| 193 | return SLJIT_SUCCESS; |
| 194 | |
| 195 | case SLJIT_MOV_UH: |
| 196 | case SLJIT_MOV_SH: |
| 197 | SLJIT_ASSERT(src1 == TMP_REG1); |
| 198 | if ((flags & (REG_DEST | REG2_SOURCE)) == (REG_DEST | REG2_SOURCE)) { |
| 199 | if (op == SLJIT_MOV_SH) |
| 200 | return push_inst(compiler, EXTSH | S(src2) | A(dst)); |
| 201 | return push_inst(compiler, INS_CLEAR_LEFT(dst, src2, 16)); |
| 202 | } |
| 203 | else if (dst != src2) |
| 204 | SLJIT_ASSERT_STOP(); |
| 205 | return SLJIT_SUCCESS; |
| 206 | |
| 207 | case SLJIT_NOT: |
| 208 | SLJIT_ASSERT(src1 == TMP_REG1); |
| 209 | return push_inst(compiler, NOR | RC(flags) | S(src2) | A(dst) | B(src2)); |
| 210 | |
| 211 | case SLJIT_NEG: |
| 212 | SLJIT_ASSERT(src1 == TMP_REG1); |
| 213 | return push_inst(compiler, NEG | OERC(flags) | D(dst) | A(src2)); |
| 214 | |
| 215 | case SLJIT_CLZ: |
| 216 | SLJIT_ASSERT(src1 == TMP_REG1); |
| 217 | return push_inst(compiler, CNTLZW | RC(flags) | S(src2) | A(dst)); |
| 218 | } |
| 219 | |
| 220 | SLJIT_ASSERT_STOP(); |
| 221 | return SLJIT_SUCCESS; |
| 222 | } |
| 223 | |
| 224 | static SLJIT_INLINE int emit_const(struct sljit_compiler *compiler, int reg, sljit_w init_value) |
| 225 | { |
| 226 | FAIL_IF(push_inst(compiler, ADDIS | D(reg) | A(0) | IMM(init_value >> 16))); |
| 227 | return push_inst(compiler, ORI | S(reg) | A(reg) | IMM(init_value)); |
| 228 | } |
| 229 | |
| 230 | SLJIT_API_FUNC_ATTRIBUTE void sljit_set_jump_addr(sljit_uw addr, sljit_uw new_addr) |
| 231 | { |
| 232 | sljit_ins *inst = (sljit_ins*)addr; |
| 233 | |
| 234 | inst[0] = (inst[0] & 0xffff0000) | ((new_addr >> 16) & 0xffff); |
| 235 | inst[1] = (inst[1] & 0xffff0000) | (new_addr & 0xffff); |
| 236 | SLJIT_CACHE_FLUSH(inst, inst + 2); |
| 237 | } |
| 238 | |
| 239 | SLJIT_API_FUNC_ATTRIBUTE void sljit_set_const(sljit_uw addr, sljit_w new_constant) |
| 240 | { |
| 241 | sljit_ins *inst = (sljit_ins*)addr; |
| 242 | |
| 243 | inst[0] = (inst[0] & 0xffff0000) | ((new_constant >> 16) & 0xffff); |
| 244 | inst[1] = (inst[1] & 0xffff0000) | (new_constant & 0xffff); |
| 245 | SLJIT_CACHE_FLUSH(inst, inst + 2); |
| 246 | } |