320 lines
9.9 KiB
C
320 lines
9.9 KiB
C
/*
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* Stack-less Just-In-Time compiler
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*
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* Copyright Zoltan Herczeg (hzmester@freemail.hu). All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without modification, are
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* permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice, this list of
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* conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright notice, this list
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* of conditions and the following disclaimer in the documentation and/or other materials
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* provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER(S) AND CONTRIBUTORS ``AS IS'' AND ANY
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
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* SHALL THE COPYRIGHT HOLDER(S) OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
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* TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
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* BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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/* mips 64-bit arch dependent functions. */
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static sljit_s32 load_immediate(struct sljit_compiler *compiler, sljit_s32 dst_ar, sljit_sw imm)
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{
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sljit_s32 shift = 32;
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sljit_s32 shift2;
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sljit_s32 inv = 0;
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sljit_ins ins;
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sljit_uw uimm;
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if (!(imm & ~0xffff))
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return push_inst(compiler, ORI | SA(0) | TA(dst_ar) | IMM(imm), dst_ar);
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if (imm < 0 && imm >= SIMM_MIN)
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return push_inst(compiler, ADDIU | SA(0) | TA(dst_ar) | IMM(imm), dst_ar);
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if (imm <= 0x7fffffffl && imm >= -0x80000000l) {
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FAIL_IF(push_inst(compiler, LUI | TA(dst_ar) | IMM(imm >> 16), dst_ar));
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return (imm & 0xffff) ? push_inst(compiler, ORI | SA(dst_ar) | TA(dst_ar) | IMM(imm), dst_ar) : SLJIT_SUCCESS;
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}
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/* Zero extended number. */
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uimm = (sljit_uw)imm;
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if (imm < 0) {
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uimm = ~(sljit_uw)imm;
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inv = 1;
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}
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while (!(uimm & 0xff00000000000000l)) {
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shift -= 8;
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uimm <<= 8;
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}
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if (!(uimm & 0xf000000000000000l)) {
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shift -= 4;
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uimm <<= 4;
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}
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if (!(uimm & 0xc000000000000000l)) {
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shift -= 2;
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uimm <<= 2;
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}
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if ((sljit_sw)uimm < 0) {
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uimm >>= 1;
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shift += 1;
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}
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SLJIT_ASSERT(((uimm & 0xc000000000000000l) == 0x4000000000000000l) && (shift > 0) && (shift <= 32));
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if (inv)
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uimm = ~uimm;
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FAIL_IF(push_inst(compiler, LUI | TA(dst_ar) | IMM(uimm >> 48), dst_ar));
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if (uimm & 0x0000ffff00000000l)
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FAIL_IF(push_inst(compiler, ORI | SA(dst_ar) | TA(dst_ar) | IMM(uimm >> 32), dst_ar));
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imm &= (1l << shift) - 1;
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if (!(imm & ~0xffff)) {
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ins = (shift == 32) ? DSLL32 : DSLL;
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if (shift < 32)
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ins |= SH_IMM(shift);
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FAIL_IF(push_inst(compiler, ins | TA(dst_ar) | DA(dst_ar), dst_ar));
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return !(imm & 0xffff) ? SLJIT_SUCCESS : push_inst(compiler, ORI | SA(dst_ar) | TA(dst_ar) | IMM(imm), dst_ar);
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}
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/* Double shifts needs to be performed. */
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uimm <<= 32;
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shift2 = shift - 16;
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while (!(uimm & 0xf000000000000000l)) {
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shift2 -= 4;
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uimm <<= 4;
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}
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if (!(uimm & 0xc000000000000000l)) {
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shift2 -= 2;
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uimm <<= 2;
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}
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if (!(uimm & 0x8000000000000000l)) {
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shift2--;
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uimm <<= 1;
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}
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SLJIT_ASSERT((uimm & 0x8000000000000000l) && (shift2 > 0) && (shift2 <= 16));
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FAIL_IF(push_inst(compiler, DSLL | TA(dst_ar) | DA(dst_ar) | SH_IMM(shift - shift2), dst_ar));
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FAIL_IF(push_inst(compiler, ORI | SA(dst_ar) | TA(dst_ar) | IMM(uimm >> 48), dst_ar));
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FAIL_IF(push_inst(compiler, DSLL | TA(dst_ar) | DA(dst_ar) | SH_IMM(shift2), dst_ar));
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imm &= (1l << shift2) - 1;
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return !(imm & 0xffff) ? SLJIT_SUCCESS : push_inst(compiler, ORI | SA(dst_ar) | TA(dst_ar) | IMM(imm), dst_ar);
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}
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static SLJIT_INLINE sljit_s32 emit_const(struct sljit_compiler *compiler, sljit_s32 dst, sljit_sw init_value)
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{
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FAIL_IF(push_inst(compiler, LUI | T(dst) | IMM(init_value >> 48), DR(dst)));
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FAIL_IF(push_inst(compiler, ORI | S(dst) | T(dst) | IMM(init_value >> 32), DR(dst)));
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FAIL_IF(push_inst(compiler, DSLL | T(dst) | D(dst) | SH_IMM(16), DR(dst)));
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FAIL_IF(push_inst(compiler, ORI | S(dst) | T(dst) | IMM(init_value >> 16), DR(dst)));
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FAIL_IF(push_inst(compiler, DSLL | T(dst) | D(dst) | SH_IMM(16), DR(dst)));
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return push_inst(compiler, ORI | S(dst) | T(dst) | IMM(init_value), DR(dst));
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}
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SLJIT_API_FUNC_ATTRIBUTE void sljit_set_jump_addr(sljit_uw addr, sljit_uw new_target, sljit_sw executable_offset)
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{
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sljit_ins *inst = (sljit_ins *)addr;
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SLJIT_UNUSED_ARG(executable_offset);
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SLJIT_UPDATE_WX_FLAGS(inst, inst + 6, 0);
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inst[0] = (inst[0] & 0xffff0000) | ((sljit_ins)(new_target >> 48) & 0xffff);
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inst[1] = (inst[1] & 0xffff0000) | ((sljit_ins)(new_target >> 32) & 0xffff);
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inst[3] = (inst[3] & 0xffff0000) | ((sljit_ins)(new_target >> 16) & 0xffff);
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inst[5] = (inst[5] & 0xffff0000) | ((sljit_ins)new_target & 0xffff);
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SLJIT_UPDATE_WX_FLAGS(inst, inst + 6, 1);
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inst = (sljit_ins *)SLJIT_ADD_EXEC_OFFSET(inst, executable_offset);
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SLJIT_CACHE_FLUSH(inst, inst + 6);
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}
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SLJIT_API_FUNC_ATTRIBUTE void sljit_set_const(sljit_uw addr, sljit_sw new_constant, sljit_sw executable_offset)
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{
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sljit_set_jump_addr(addr, (sljit_uw)new_constant, executable_offset);
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}
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static sljit_s32 call_with_args(struct sljit_compiler *compiler, sljit_s32 arg_types, sljit_ins *ins_ptr)
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{
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sljit_s32 arg_count = 0;
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sljit_s32 word_arg_count = 0;
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sljit_s32 float_arg_count = 0;
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sljit_s32 types = 0;
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sljit_ins prev_ins = *ins_ptr;
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sljit_ins ins = NOP;
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SLJIT_ASSERT(reg_map[TMP_REG1] == 4 && freg_map[TMP_FREG1] == 12);
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arg_types >>= SLJIT_ARG_SHIFT;
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while (arg_types) {
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types = (types << SLJIT_ARG_SHIFT) | (arg_types & SLJIT_ARG_MASK);
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switch (arg_types & SLJIT_ARG_MASK) {
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case SLJIT_ARG_TYPE_F64:
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case SLJIT_ARG_TYPE_F32:
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arg_count++;
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float_arg_count++;
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break;
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default:
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arg_count++;
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word_arg_count++;
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break;
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}
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arg_types >>= SLJIT_ARG_SHIFT;
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}
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while (types) {
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switch (types & SLJIT_ARG_MASK) {
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case SLJIT_ARG_TYPE_F64:
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if (arg_count != float_arg_count)
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ins = MOV_S | FMT_D | FS(float_arg_count) | FD(arg_count);
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else if (arg_count == 1)
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ins = MOV_S | FMT_D | FS(SLJIT_FR0) | FD(TMP_FREG1);
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arg_count--;
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float_arg_count--;
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break;
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case SLJIT_ARG_TYPE_F32:
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if (arg_count != float_arg_count)
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ins = MOV_S | FMT_S | FS(float_arg_count) | FD(arg_count);
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else if (arg_count == 1)
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ins = MOV_S | FMT_S | FS(SLJIT_FR0) | FD(TMP_FREG1);
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arg_count--;
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float_arg_count--;
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break;
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default:
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if (arg_count != word_arg_count)
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ins = DADDU | S(word_arg_count) | TA(0) | D(arg_count);
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else if (arg_count == 1)
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ins = DADDU | S(SLJIT_R0) | TA(0) | DA(4);
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arg_count--;
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word_arg_count--;
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break;
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}
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if (ins != NOP) {
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if (prev_ins != NOP)
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FAIL_IF(push_inst(compiler, prev_ins, MOVABLE_INS));
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prev_ins = ins;
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ins = NOP;
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}
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types >>= SLJIT_ARG_SHIFT;
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}
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*ins_ptr = prev_ins;
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return SLJIT_SUCCESS;
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}
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SLJIT_API_FUNC_ATTRIBUTE struct sljit_jump* sljit_emit_call(struct sljit_compiler *compiler, sljit_s32 type,
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sljit_s32 arg_types)
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{
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struct sljit_jump *jump;
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sljit_ins ins = NOP;
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CHECK_ERROR_PTR();
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CHECK_PTR(check_sljit_emit_call(compiler, type, arg_types));
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jump = (struct sljit_jump*)ensure_abuf(compiler, sizeof(struct sljit_jump));
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PTR_FAIL_IF(!jump);
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set_jump(jump, compiler, type & SLJIT_REWRITABLE_JUMP);
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if (type & SLJIT_CALL_RETURN)
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PTR_FAIL_IF(emit_stack_frame_release(compiler, 0, &ins));
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if ((type & 0xff) != SLJIT_CALL_REG_ARG)
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PTR_FAIL_IF(call_with_args(compiler, arg_types, &ins));
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SLJIT_ASSERT(DR(PIC_ADDR_REG) == 25 && PIC_ADDR_REG == TMP_REG2);
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if (ins == NOP && compiler->delay_slot != UNMOVABLE_INS)
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jump->flags |= IS_MOVABLE;
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if (!(type & SLJIT_CALL_RETURN)) {
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jump->flags |= IS_JAL;
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if ((type & 0xff) != SLJIT_CALL_REG_ARG)
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jump->flags |= IS_CALL;
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PTR_FAIL_IF(push_inst(compiler, JALR | S(PIC_ADDR_REG) | DA(RETURN_ADDR_REG), UNMOVABLE_INS));
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} else
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PTR_FAIL_IF(push_inst(compiler, JR | S(PIC_ADDR_REG), UNMOVABLE_INS));
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jump->addr = compiler->size;
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PTR_FAIL_IF(push_inst(compiler, ins, UNMOVABLE_INS));
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/* Maximum number of instructions required for generating a constant. */
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compiler->size += 6;
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return jump;
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}
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SLJIT_API_FUNC_ATTRIBUTE sljit_s32 sljit_emit_icall(struct sljit_compiler *compiler, sljit_s32 type,
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sljit_s32 arg_types,
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sljit_s32 src, sljit_sw srcw)
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{
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sljit_ins ins = NOP;
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CHECK_ERROR();
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CHECK(check_sljit_emit_icall(compiler, type, arg_types, src, srcw));
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if (src & SLJIT_MEM) {
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ADJUST_LOCAL_OFFSET(src, srcw);
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FAIL_IF(emit_op_mem(compiler, WORD_DATA | LOAD_DATA, DR(PIC_ADDR_REG), src, srcw));
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src = PIC_ADDR_REG;
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srcw = 0;
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}
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if ((type & 0xff) == SLJIT_CALL_REG_ARG) {
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if (type & SLJIT_CALL_RETURN) {
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if (src >= SLJIT_FIRST_SAVED_REG && src <= SLJIT_S0) {
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FAIL_IF(push_inst(compiler, DADDU | S(src) | TA(0) | D(PIC_ADDR_REG), DR(PIC_ADDR_REG)));
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src = PIC_ADDR_REG;
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srcw = 0;
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}
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FAIL_IF(emit_stack_frame_release(compiler, 0, &ins));
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if (ins != NOP)
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FAIL_IF(push_inst(compiler, ins, MOVABLE_INS));
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}
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SLJIT_SKIP_CHECKS(compiler);
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return sljit_emit_ijump(compiler, type, src, srcw);
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}
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SLJIT_ASSERT(DR(PIC_ADDR_REG) == 25 && PIC_ADDR_REG == TMP_REG2);
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if (src & SLJIT_IMM)
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FAIL_IF(load_immediate(compiler, DR(PIC_ADDR_REG), srcw));
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else if (src != PIC_ADDR_REG)
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FAIL_IF(push_inst(compiler, DADDU | S(src) | TA(0) | D(PIC_ADDR_REG), DR(PIC_ADDR_REG)));
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if (type & SLJIT_CALL_RETURN)
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FAIL_IF(emit_stack_frame_release(compiler, 0, &ins));
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FAIL_IF(call_with_args(compiler, arg_types, &ins));
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/* Register input. */
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if (!(type & SLJIT_CALL_RETURN))
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FAIL_IF(push_inst(compiler, JALR | S(PIC_ADDR_REG) | DA(RETURN_ADDR_REG), UNMOVABLE_INS));
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else
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FAIL_IF(push_inst(compiler, JR | S(PIC_ADDR_REG), UNMOVABLE_INS));
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return push_inst(compiler, ins, UNMOVABLE_INS);
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}
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