| /* |
| * Stack-less Just-In-Time compiler |
| * |
| * Copyright Zoltan Herczeg (hzmester@freemail.hu). All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without modification, are |
| * permitted provided that the following conditions are met: |
| * |
| * 1. Redistributions of source code must retain the above copyright notice, this list of |
| * conditions and the following disclaimer. |
| * |
| * 2. Redistributions in binary form must reproduce the above copyright notice, this list |
| * of conditions and the following disclaimer in the documentation and/or other materials |
| * provided with the distribution. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER(S) AND CONTRIBUTORS ``AS IS'' AND ANY |
| * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
| * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT |
| * SHALL THE COPYRIGHT HOLDER(S) OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, |
| * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED |
| * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR |
| * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
| * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN |
| * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| /* ppc 32-bit arch dependent functions. */ |
| |
| static sljit_s32 load_immediate(struct sljit_compiler *compiler, sljit_s32 reg, sljit_sw imm) |
| { |
| if (imm <= SIMM_MAX && imm >= SIMM_MIN) |
| return push_inst(compiler, ADDI | D(reg) | A(0) | IMM(imm)); |
| |
| if (!(imm & ~0xffff)) |
| return push_inst(compiler, ORI | S(TMP_ZERO) | A(reg) | IMM(imm)); |
| |
| FAIL_IF(push_inst(compiler, ADDIS | D(reg) | A(0) | IMM(imm >> 16))); |
| return (imm & 0xffff) ? push_inst(compiler, ORI | S(reg) | A(reg) | IMM(imm)) : SLJIT_SUCCESS; |
| } |
| |
| #define INS_CLEAR_LEFT(dst, src, from) \ |
| (RLWINM | S(src) | A(dst) | ((from) << 6) | (31 << 1)) |
| |
| static SLJIT_INLINE sljit_s32 emit_single_op(struct sljit_compiler *compiler, sljit_s32 op, sljit_s32 flags, |
| sljit_s32 dst, sljit_s32 src1, sljit_s32 src2) |
| { |
| switch (op) { |
| case SLJIT_MOV: |
| case SLJIT_MOV_U32: |
| case SLJIT_MOV_S32: |
| case SLJIT_MOV_P: |
| SLJIT_ASSERT(src1 == TMP_REG1); |
| if (dst != src2) |
| return push_inst(compiler, OR | S(src2) | A(dst) | B(src2)); |
| return SLJIT_SUCCESS; |
| |
| case SLJIT_MOV_U8: |
| case SLJIT_MOV_S8: |
| SLJIT_ASSERT(src1 == TMP_REG1); |
| if ((flags & (REG_DEST | REG2_SOURCE)) == (REG_DEST | REG2_SOURCE)) { |
| if (op == SLJIT_MOV_S8) |
| return push_inst(compiler, EXTSB | S(src2) | A(dst)); |
| return push_inst(compiler, INS_CLEAR_LEFT(dst, src2, 24)); |
| } |
| else if ((flags & REG_DEST) && op == SLJIT_MOV_S8) |
| return push_inst(compiler, EXTSB | S(src2) | A(dst)); |
| else { |
| SLJIT_ASSERT(dst == src2); |
| } |
| return SLJIT_SUCCESS; |
| |
| case SLJIT_MOV_U16: |
| case SLJIT_MOV_S16: |
| SLJIT_ASSERT(src1 == TMP_REG1); |
| if ((flags & (REG_DEST | REG2_SOURCE)) == (REG_DEST | REG2_SOURCE)) { |
| if (op == SLJIT_MOV_S16) |
| return push_inst(compiler, EXTSH | S(src2) | A(dst)); |
| return push_inst(compiler, INS_CLEAR_LEFT(dst, src2, 16)); |
| } |
| else { |
| SLJIT_ASSERT(dst == src2); |
| } |
| return SLJIT_SUCCESS; |
| |
| case SLJIT_NOT: |
| SLJIT_ASSERT(src1 == TMP_REG1); |
| return push_inst(compiler, NOR | RC(flags) | S(src2) | A(dst) | B(src2)); |
| |
| case SLJIT_CLZ: |
| SLJIT_ASSERT(src1 == TMP_REG1); |
| return push_inst(compiler, CNTLZW | S(src2) | A(dst)); |
| |
| case SLJIT_ADD: |
| if (flags & ALT_FORM1) { |
| /* Setting XER SO is not enough, CR SO is also needed. */ |
| return push_inst(compiler, ADD | OE(ALT_SET_FLAGS) | RC(ALT_SET_FLAGS) | D(dst) | A(src1) | B(src2)); |
| } |
| |
| if (flags & ALT_FORM2) { |
| /* Flags does not set: BIN_IMM_EXTS unnecessary. */ |
| SLJIT_ASSERT(src2 == TMP_REG2); |
| |
| if (flags & ALT_FORM3) |
| return push_inst(compiler, ADDIS | D(dst) | A(src1) | compiler->imm); |
| |
| if (flags & ALT_FORM4) { |
| FAIL_IF(push_inst(compiler, ADDIS | D(dst) | A(src1) | (((compiler->imm >> 16) & 0xffff) + ((compiler->imm >> 15) & 0x1)))); |
| src1 = dst; |
| } |
| |
| return push_inst(compiler, ADDI | D(dst) | A(src1) | (compiler->imm & 0xffff)); |
| } |
| if (flags & ALT_FORM3) { |
| SLJIT_ASSERT(src2 == TMP_REG2); |
| return push_inst(compiler, ADDIC | D(dst) | A(src1) | compiler->imm); |
| } |
| SLJIT_ASSERT(!(flags & ALT_FORM4)); |
| if (!(flags & ALT_SET_FLAGS)) |
| return push_inst(compiler, ADD | D(dst) | A(src1) | B(src2)); |
| if (flags & ALT_FORM5) |
| return push_inst(compiler, ADDC | RC(ALT_SET_FLAGS) | D(dst) | A(src1) | B(src2)); |
| return push_inst(compiler, ADD | RC(flags) | D(dst) | A(src1) | B(src2)); |
| |
| case SLJIT_ADDC: |
| return push_inst(compiler, ADDE | D(dst) | A(src1) | B(src2)); |
| |
| case SLJIT_SUB: |
| if (flags & ALT_FORM1) { |
| if (flags & ALT_FORM2) { |
| FAIL_IF(push_inst(compiler, CMPLI | CRD(0) | A(src1) | compiler->imm)); |
| if (!(flags & ALT_FORM3)) |
| return SLJIT_SUCCESS; |
| return push_inst(compiler, ADDI | D(dst) | A(src1) | (-compiler->imm & 0xffff)); |
| } |
| FAIL_IF(push_inst(compiler, CMPL | CRD(0) | A(src1) | B(src2))); |
| if (!(flags & ALT_FORM3)) |
| return SLJIT_SUCCESS; |
| return push_inst(compiler, SUBF | D(dst) | A(src2) | B(src1)); |
| } |
| |
| if (flags & ALT_FORM2) { |
| if (flags & ALT_FORM3) { |
| FAIL_IF(push_inst(compiler, CMPI | CRD(0) | A(src1) | compiler->imm)); |
| if (!(flags & ALT_FORM4)) |
| return SLJIT_SUCCESS; |
| return push_inst(compiler, ADDI | D(dst) | A(src1) | (-compiler->imm & 0xffff)); |
| } |
| FAIL_IF(push_inst(compiler, CMP | CRD(0) | A(src1) | B(src2))); |
| if (!(flags & ALT_FORM4)) |
| return SLJIT_SUCCESS; |
| return push_inst(compiler, SUBF | D(dst) | A(src2) | B(src1)); |
| } |
| |
| if (flags & ALT_FORM3) { |
| /* Setting XER SO is not enough, CR SO is also needed. */ |
| if (src1 != TMP_ZERO) |
| return push_inst(compiler, SUBF | OE(ALT_SET_FLAGS) | RC(ALT_SET_FLAGS) | D(dst) | A(src2) | B(src1)); |
| return push_inst(compiler, NEG | OE(ALT_SET_FLAGS) | RC(ALT_SET_FLAGS) | D(dst) | A(src2)); |
| } |
| |
| if (flags & ALT_FORM4) { |
| /* Flags does not set: BIN_IMM_EXTS unnecessary. */ |
| SLJIT_ASSERT(src2 == TMP_REG2); |
| return push_inst(compiler, SUBFIC | D(dst) | A(src1) | compiler->imm); |
| } |
| |
| if (!(flags & ALT_SET_FLAGS)) { |
| SLJIT_ASSERT(src1 != TMP_ZERO); |
| return push_inst(compiler, SUBF | D(dst) | A(src2) | B(src1)); |
| } |
| |
| if (flags & ALT_FORM5) |
| return push_inst(compiler, SUBFC | RC(ALT_SET_FLAGS) | D(dst) | A(src2) | B(src1)); |
| |
| if (src1 != TMP_ZERO) |
| return push_inst(compiler, SUBF | RC(ALT_SET_FLAGS) | D(dst) | A(src2) | B(src1)); |
| return push_inst(compiler, NEG | RC(ALT_SET_FLAGS) | D(dst) | A(src2)); |
| |
| case SLJIT_SUBC: |
| return push_inst(compiler, SUBFE | D(dst) | A(src2) | B(src1)); |
| |
| case SLJIT_MUL: |
| if (flags & ALT_FORM1) { |
| SLJIT_ASSERT(src2 == TMP_REG2); |
| return push_inst(compiler, MULLI | D(dst) | A(src1) | compiler->imm); |
| } |
| return push_inst(compiler, MULLW | OE(flags) | RC(flags) | D(dst) | A(src2) | B(src1)); |
| |
| case SLJIT_AND: |
| if (flags & ALT_FORM1) { |
| SLJIT_ASSERT(src2 == TMP_REG2); |
| return push_inst(compiler, ANDI | S(src1) | A(dst) | compiler->imm); |
| } |
| if (flags & ALT_FORM2) { |
| SLJIT_ASSERT(src2 == TMP_REG2); |
| return push_inst(compiler, ANDIS | S(src1) | A(dst) | compiler->imm); |
| } |
| return push_inst(compiler, AND | RC(flags) | S(src1) | A(dst) | B(src2)); |
| |
| case SLJIT_OR: |
| if (flags & ALT_FORM1) { |
| SLJIT_ASSERT(src2 == TMP_REG2); |
| return push_inst(compiler, ORI | S(src1) | A(dst) | compiler->imm); |
| } |
| if (flags & ALT_FORM2) { |
| SLJIT_ASSERT(src2 == TMP_REG2); |
| return push_inst(compiler, ORIS | S(src1) | A(dst) | compiler->imm); |
| } |
| if (flags & ALT_FORM3) { |
| SLJIT_ASSERT(src2 == TMP_REG2); |
| FAIL_IF(push_inst(compiler, ORI | S(src1) | A(dst) | IMM(compiler->imm))); |
| return push_inst(compiler, ORIS | S(dst) | A(dst) | IMM(compiler->imm >> 16)); |
| } |
| return push_inst(compiler, OR | RC(flags) | S(src1) | A(dst) | B(src2)); |
| |
| case SLJIT_XOR: |
| if (flags & ALT_FORM1) { |
| SLJIT_ASSERT(src2 == TMP_REG2); |
| return push_inst(compiler, XORI | S(src1) | A(dst) | compiler->imm); |
| } |
| if (flags & ALT_FORM2) { |
| SLJIT_ASSERT(src2 == TMP_REG2); |
| return push_inst(compiler, XORIS | S(src1) | A(dst) | compiler->imm); |
| } |
| if (flags & ALT_FORM3) { |
| SLJIT_ASSERT(src2 == TMP_REG2); |
| FAIL_IF(push_inst(compiler, XORI | S(src1) | A(dst) | IMM(compiler->imm))); |
| return push_inst(compiler, XORIS | S(dst) | A(dst) | IMM(compiler->imm >> 16)); |
| } |
| return push_inst(compiler, XOR | RC(flags) | S(src1) | A(dst) | B(src2)); |
| |
| case SLJIT_SHL: |
| if (flags & ALT_FORM1) { |
| SLJIT_ASSERT(src2 == TMP_REG2); |
| compiler->imm &= 0x1f; |
| return push_inst(compiler, RLWINM | RC(flags) | S(src1) | A(dst) | (compiler->imm << 11) | ((31 - compiler->imm) << 1)); |
| } |
| return push_inst(compiler, SLW | RC(flags) | S(src1) | A(dst) | B(src2)); |
| |
| case SLJIT_LSHR: |
| if (flags & ALT_FORM1) { |
| SLJIT_ASSERT(src2 == TMP_REG2); |
| compiler->imm &= 0x1f; |
| return push_inst(compiler, RLWINM | RC(flags) | S(src1) | A(dst) | (((32 - compiler->imm) & 0x1f) << 11) | (compiler->imm << 6) | (31 << 1)); |
| } |
| return push_inst(compiler, SRW | RC(flags) | S(src1) | A(dst) | B(src2)); |
| |
| case SLJIT_ASHR: |
| if (flags & ALT_FORM1) { |
| SLJIT_ASSERT(src2 == TMP_REG2); |
| compiler->imm &= 0x1f; |
| return push_inst(compiler, SRAWI | RC(flags) | S(src1) | A(dst) | (compiler->imm << 11)); |
| } |
| return push_inst(compiler, SRAW | RC(flags) | S(src1) | A(dst) | B(src2)); |
| } |
| |
| SLJIT_UNREACHABLE(); |
| return SLJIT_SUCCESS; |
| } |
| |
| static SLJIT_INLINE sljit_s32 emit_const(struct sljit_compiler *compiler, sljit_s32 reg, sljit_sw init_value) |
| { |
| FAIL_IF(push_inst(compiler, ADDIS | D(reg) | A(0) | IMM(init_value >> 16))); |
| return push_inst(compiler, ORI | S(reg) | A(reg) | IMM(init_value)); |
| } |
| |
| SLJIT_API_FUNC_ATTRIBUTE void sljit_set_jump_addr(sljit_uw addr, sljit_uw new_target, sljit_sw executable_offset) |
| { |
| sljit_ins *inst = (sljit_ins *)addr; |
| SLJIT_UNUSED_ARG(executable_offset); |
| |
| SLJIT_UPDATE_WX_FLAGS(inst, inst + 2, 0); |
| SLJIT_ASSERT((inst[0] & 0xfc1f0000) == ADDIS && (inst[1] & 0xfc000000) == ORI); |
| inst[0] = (inst[0] & 0xffff0000) | ((new_target >> 16) & 0xffff); |
| inst[1] = (inst[1] & 0xffff0000) | (new_target & 0xffff); |
| SLJIT_UPDATE_WX_FLAGS(inst, inst + 2, 1); |
| inst = (sljit_ins *)SLJIT_ADD_EXEC_OFFSET(inst, executable_offset); |
| SLJIT_CACHE_FLUSH(inst, inst + 2); |
| } |
| |
| SLJIT_API_FUNC_ATTRIBUTE void sljit_set_const(sljit_uw addr, sljit_sw new_constant, sljit_sw executable_offset) |
| { |
| sljit_set_jump_addr(addr, (sljit_uw)new_constant, executable_offset); |
| } |