| /* |
| * 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. |
| */ |
| |
| /* mips 64-bit arch dependent functions. */ |
| |
| static sljit_s32 load_immediate(struct sljit_compiler *compiler, sljit_s32 dst_ar, sljit_sw imm) |
| { |
| sljit_s32 shift = 32; |
| sljit_s32 shift2; |
| sljit_s32 inv = 0; |
| sljit_ins ins; |
| sljit_uw uimm; |
| |
| if (!(imm & ~0xffff)) |
| return push_inst(compiler, ORI | SA(0) | TA(dst_ar) | IMM(imm), dst_ar); |
| |
| if (imm < 0 && imm >= SIMM_MIN) |
| return push_inst(compiler, ADDIU | SA(0) | TA(dst_ar) | IMM(imm), dst_ar); |
| |
| if (imm <= 0x7fffffffl && imm >= -0x80000000l) { |
| FAIL_IF(push_inst(compiler, LUI | TA(dst_ar) | IMM(imm >> 16), dst_ar)); |
| return (imm & 0xffff) ? push_inst(compiler, ORI | SA(dst_ar) | TA(dst_ar) | IMM(imm), dst_ar) : SLJIT_SUCCESS; |
| } |
| |
| /* Zero extended number. */ |
| uimm = (sljit_uw)imm; |
| if (imm < 0) { |
| uimm = ~(sljit_uw)imm; |
| inv = 1; |
| } |
| |
| while (!(uimm & 0xff00000000000000l)) { |
| shift -= 8; |
| uimm <<= 8; |
| } |
| |
| if (!(uimm & 0xf000000000000000l)) { |
| shift -= 4; |
| uimm <<= 4; |
| } |
| |
| if (!(uimm & 0xc000000000000000l)) { |
| shift -= 2; |
| uimm <<= 2; |
| } |
| |
| if ((sljit_sw)uimm < 0) { |
| uimm >>= 1; |
| shift += 1; |
| } |
| SLJIT_ASSERT(((uimm & 0xc000000000000000l) == 0x4000000000000000l) && (shift > 0) && (shift <= 32)); |
| |
| if (inv) |
| uimm = ~uimm; |
| |
| FAIL_IF(push_inst(compiler, LUI | TA(dst_ar) | IMM(uimm >> 48), dst_ar)); |
| if (uimm & 0x0000ffff00000000l) |
| FAIL_IF(push_inst(compiler, ORI | SA(dst_ar) | TA(dst_ar) | IMM(uimm >> 32), dst_ar)); |
| |
| imm &= (1l << shift) - 1; |
| if (!(imm & ~0xffff)) { |
| ins = (shift == 32) ? DSLL32 : DSLL; |
| if (shift < 32) |
| ins |= SH_IMM(shift); |
| FAIL_IF(push_inst(compiler, ins | TA(dst_ar) | DA(dst_ar), dst_ar)); |
| return !(imm & 0xffff) ? SLJIT_SUCCESS : push_inst(compiler, ORI | SA(dst_ar) | TA(dst_ar) | IMM(imm), dst_ar); |
| } |
| |
| /* Double shifts needs to be performed. */ |
| uimm <<= 32; |
| shift2 = shift - 16; |
| |
| while (!(uimm & 0xf000000000000000l)) { |
| shift2 -= 4; |
| uimm <<= 4; |
| } |
| |
| if (!(uimm & 0xc000000000000000l)) { |
| shift2 -= 2; |
| uimm <<= 2; |
| } |
| |
| if (!(uimm & 0x8000000000000000l)) { |
| shift2--; |
| uimm <<= 1; |
| } |
| |
| SLJIT_ASSERT((uimm & 0x8000000000000000l) && (shift2 > 0) && (shift2 <= 16)); |
| |
| FAIL_IF(push_inst(compiler, DSLL | TA(dst_ar) | DA(dst_ar) | SH_IMM(shift - shift2), dst_ar)); |
| FAIL_IF(push_inst(compiler, ORI | SA(dst_ar) | TA(dst_ar) | IMM(uimm >> 48), dst_ar)); |
| FAIL_IF(push_inst(compiler, DSLL | TA(dst_ar) | DA(dst_ar) | SH_IMM(shift2), dst_ar)); |
| |
| imm &= (1l << shift2) - 1; |
| return !(imm & 0xffff) ? SLJIT_SUCCESS : push_inst(compiler, ORI | SA(dst_ar) | TA(dst_ar) | IMM(imm), dst_ar); |
| } |
| |
| static SLJIT_INLINE sljit_s32 emit_const(struct sljit_compiler *compiler, sljit_s32 dst, sljit_sw init_value) |
| { |
| FAIL_IF(push_inst(compiler, LUI | T(dst) | IMM(init_value >> 48), DR(dst))); |
| FAIL_IF(push_inst(compiler, ORI | S(dst) | T(dst) | IMM(init_value >> 32), DR(dst))); |
| FAIL_IF(push_inst(compiler, DSLL | T(dst) | D(dst) | SH_IMM(16), DR(dst))); |
| FAIL_IF(push_inst(compiler, ORI | S(dst) | T(dst) | IMM(init_value >> 16), DR(dst))); |
| FAIL_IF(push_inst(compiler, DSLL | T(dst) | D(dst) | SH_IMM(16), DR(dst))); |
| return push_inst(compiler, ORI | S(dst) | T(dst) | IMM(init_value), DR(dst)); |
| } |
| |
| 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 + 6, 0); |
| inst[0] = (inst[0] & 0xffff0000) | ((sljit_ins)(new_target >> 48) & 0xffff); |
| inst[1] = (inst[1] & 0xffff0000) | ((sljit_ins)(new_target >> 32) & 0xffff); |
| inst[3] = (inst[3] & 0xffff0000) | ((sljit_ins)(new_target >> 16) & 0xffff); |
| inst[5] = (inst[5] & 0xffff0000) | ((sljit_ins)new_target & 0xffff); |
| SLJIT_UPDATE_WX_FLAGS(inst, inst + 6, 1); |
| inst = (sljit_ins *)SLJIT_ADD_EXEC_OFFSET(inst, executable_offset); |
| SLJIT_CACHE_FLUSH(inst, inst + 6); |
| } |
| |
| 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); |
| } |
| |
| static sljit_s32 call_with_args(struct sljit_compiler *compiler, sljit_s32 arg_types, sljit_ins *ins_ptr) |
| { |
| sljit_s32 arg_count = 0; |
| sljit_s32 word_arg_count = 0; |
| sljit_s32 float_arg_count = 0; |
| sljit_s32 types = 0; |
| sljit_ins prev_ins = *ins_ptr; |
| sljit_ins ins = NOP; |
| |
| SLJIT_ASSERT(reg_map[TMP_REG1] == 4 && freg_map[TMP_FREG1] == 12); |
| |
| arg_types >>= SLJIT_ARG_SHIFT; |
| |
| while (arg_types) { |
| types = (types << SLJIT_ARG_SHIFT) | (arg_types & SLJIT_ARG_MASK); |
| |
| switch (arg_types & SLJIT_ARG_MASK) { |
| case SLJIT_ARG_TYPE_F64: |
| case SLJIT_ARG_TYPE_F32: |
| arg_count++; |
| float_arg_count++; |
| break; |
| default: |
| arg_count++; |
| word_arg_count++; |
| break; |
| } |
| |
| arg_types >>= SLJIT_ARG_SHIFT; |
| } |
| |
| while (types) { |
| switch (types & SLJIT_ARG_MASK) { |
| case SLJIT_ARG_TYPE_F64: |
| if (arg_count != float_arg_count) |
| ins = MOV_S | FMT_D | FS(float_arg_count) | FD(arg_count); |
| else if (arg_count == 1) |
| ins = MOV_S | FMT_D | FS(SLJIT_FR0) | FD(TMP_FREG1); |
| arg_count--; |
| float_arg_count--; |
| break; |
| case SLJIT_ARG_TYPE_F32: |
| if (arg_count != float_arg_count) |
| ins = MOV_S | FMT_S | FS(float_arg_count) | FD(arg_count); |
| else if (arg_count == 1) |
| ins = MOV_S | FMT_S | FS(SLJIT_FR0) | FD(TMP_FREG1); |
| arg_count--; |
| float_arg_count--; |
| break; |
| default: |
| if (arg_count != word_arg_count) |
| ins = DADDU | S(word_arg_count) | TA(0) | D(arg_count); |
| else if (arg_count == 1) |
| ins = DADDU | S(SLJIT_R0) | TA(0) | DA(4); |
| arg_count--; |
| word_arg_count--; |
| break; |
| } |
| |
| if (ins != NOP) { |
| if (prev_ins != NOP) |
| FAIL_IF(push_inst(compiler, prev_ins, MOVABLE_INS)); |
| prev_ins = ins; |
| ins = NOP; |
| } |
| |
| types >>= SLJIT_ARG_SHIFT; |
| } |
| |
| *ins_ptr = prev_ins; |
| |
| return SLJIT_SUCCESS; |
| } |
| |
| SLJIT_API_FUNC_ATTRIBUTE struct sljit_jump* sljit_emit_call(struct sljit_compiler *compiler, sljit_s32 type, |
| sljit_s32 arg_types) |
| { |
| struct sljit_jump *jump; |
| sljit_ins ins = NOP; |
| |
| CHECK_ERROR_PTR(); |
| CHECK_PTR(check_sljit_emit_call(compiler, type, arg_types)); |
| |
| jump = (struct sljit_jump*)ensure_abuf(compiler, sizeof(struct sljit_jump)); |
| PTR_FAIL_IF(!jump); |
| set_jump(jump, compiler, type & SLJIT_REWRITABLE_JUMP); |
| |
| if (type & SLJIT_CALL_RETURN) |
| PTR_FAIL_IF(emit_stack_frame_release(compiler, 0, &ins)); |
| |
| if ((type & 0xff) != SLJIT_CALL_REG_ARG) |
| PTR_FAIL_IF(call_with_args(compiler, arg_types, &ins)); |
| |
| SLJIT_ASSERT(DR(PIC_ADDR_REG) == 25 && PIC_ADDR_REG == TMP_REG2); |
| |
| if (ins == NOP && compiler->delay_slot != UNMOVABLE_INS) |
| jump->flags |= IS_MOVABLE; |
| |
| if (!(type & SLJIT_CALL_RETURN)) { |
| jump->flags |= IS_JAL; |
| |
| if ((type & 0xff) != SLJIT_CALL_REG_ARG) |
| jump->flags |= IS_CALL; |
| |
| PTR_FAIL_IF(push_inst(compiler, JALR | S(PIC_ADDR_REG) | DA(RETURN_ADDR_REG), UNMOVABLE_INS)); |
| } else |
| PTR_FAIL_IF(push_inst(compiler, JR | S(PIC_ADDR_REG), UNMOVABLE_INS)); |
| |
| jump->addr = compiler->size; |
| PTR_FAIL_IF(push_inst(compiler, ins, UNMOVABLE_INS)); |
| |
| /* Maximum number of instructions required for generating a constant. */ |
| compiler->size += 6; |
| return jump; |
| } |
| |
| SLJIT_API_FUNC_ATTRIBUTE sljit_s32 sljit_emit_icall(struct sljit_compiler *compiler, sljit_s32 type, |
| sljit_s32 arg_types, |
| sljit_s32 src, sljit_sw srcw) |
| { |
| sljit_ins ins = NOP; |
| |
| CHECK_ERROR(); |
| CHECK(check_sljit_emit_icall(compiler, type, arg_types, src, srcw)); |
| |
| if (src & SLJIT_MEM) { |
| ADJUST_LOCAL_OFFSET(src, srcw); |
| FAIL_IF(emit_op_mem(compiler, WORD_DATA | LOAD_DATA, DR(PIC_ADDR_REG), src, srcw)); |
| src = PIC_ADDR_REG; |
| srcw = 0; |
| } |
| |
| if ((type & 0xff) == SLJIT_CALL_REG_ARG) { |
| if (type & SLJIT_CALL_RETURN) { |
| if (src >= SLJIT_FIRST_SAVED_REG && src <= (SLJIT_S0 - SLJIT_KEPT_SAVEDS_COUNT(compiler->options))) { |
| FAIL_IF(push_inst(compiler, DADDU | S(src) | TA(0) | D(PIC_ADDR_REG), DR(PIC_ADDR_REG))); |
| src = PIC_ADDR_REG; |
| srcw = 0; |
| } |
| |
| FAIL_IF(emit_stack_frame_release(compiler, 0, &ins)); |
| |
| if (ins != NOP) |
| FAIL_IF(push_inst(compiler, ins, MOVABLE_INS)); |
| } |
| |
| SLJIT_SKIP_CHECKS(compiler); |
| return sljit_emit_ijump(compiler, type, src, srcw); |
| } |
| |
| SLJIT_ASSERT(DR(PIC_ADDR_REG) == 25 && PIC_ADDR_REG == TMP_REG2); |
| |
| if (src & SLJIT_IMM) |
| FAIL_IF(load_immediate(compiler, DR(PIC_ADDR_REG), srcw)); |
| else if (src != PIC_ADDR_REG) |
| FAIL_IF(push_inst(compiler, DADDU | S(src) | TA(0) | D(PIC_ADDR_REG), DR(PIC_ADDR_REG))); |
| |
| if (type & SLJIT_CALL_RETURN) |
| FAIL_IF(emit_stack_frame_release(compiler, 0, &ins)); |
| |
| FAIL_IF(call_with_args(compiler, arg_types, &ins)); |
| |
| /* Register input. */ |
| if (!(type & SLJIT_CALL_RETURN)) |
| FAIL_IF(push_inst(compiler, JALR | S(PIC_ADDR_REG) | DA(RETURN_ADDR_REG), UNMOVABLE_INS)); |
| else |
| FAIL_IF(push_inst(compiler, JR | S(PIC_ADDR_REG), UNMOVABLE_INS)); |
| return push_inst(compiler, ins, UNMOVABLE_INS); |
| } |