165 lines
7.4 KiB
C
165 lines
7.4 KiB
C
/*
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* Stack-less Just-In-Time compiler
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*
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* Copyright 2009-2012 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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static sljit_si load_immediate(struct sljit_compiler *compiler, sljit_si dst, sljit_sw imm)
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{
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if (imm <= SIMM_MAX && imm >= SIMM_MIN)
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return push_inst(compiler, OR | D(dst) | S1(0) | IMM(imm), DR(dst));
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FAIL_IF(push_inst(compiler, SETHI | D(dst) | ((imm >> 10) & 0x3fffff), DR(dst)));
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return (imm & 0x3ff) ? push_inst(compiler, OR | D(dst) | S1(dst) | IMM_ARG | (imm & 0x3ff), DR(dst)) : SLJIT_SUCCESS;
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}
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#define ARG2(flags, src2) ((flags & SRC2_IMM) ? IMM(src2) : S2(src2))
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static SLJIT_INLINE sljit_si emit_single_op(struct sljit_compiler *compiler, sljit_si op, sljit_si flags,
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sljit_si dst, sljit_si src1, sljit_sw src2)
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{
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SLJIT_COMPILE_ASSERT(ICC_IS_SET == SET_FLAGS, icc_is_set_and_set_flags_must_be_the_same);
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switch (op) {
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case SLJIT_MOV:
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case SLJIT_MOV_UI:
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case SLJIT_MOV_SI:
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case SLJIT_MOV_P:
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SLJIT_ASSERT(src1 == TMP_REG1 && !(flags & SRC2_IMM));
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if (dst != src2)
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return push_inst(compiler, OR | D(dst) | S1(0) | S2(src2), DR(dst));
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return SLJIT_SUCCESS;
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case SLJIT_MOV_UB:
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case SLJIT_MOV_SB:
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SLJIT_ASSERT(src1 == TMP_REG1 && !(flags & SRC2_IMM));
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if ((flags & (REG_DEST | REG2_SOURCE)) == (REG_DEST | REG2_SOURCE)) {
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if (op == SLJIT_MOV_UB)
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return push_inst(compiler, AND | D(dst) | S1(src2) | IMM(0xff), DR(dst));
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FAIL_IF(push_inst(compiler, SLL | D(dst) | S1(src2) | IMM(24), DR(dst)));
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return push_inst(compiler, SRA | D(dst) | S1(dst) | IMM(24), DR(dst));
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}
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else if (dst != src2)
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SLJIT_ASSERT_STOP();
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return SLJIT_SUCCESS;
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case SLJIT_MOV_UH:
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case SLJIT_MOV_SH:
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SLJIT_ASSERT(src1 == TMP_REG1 && !(flags & SRC2_IMM));
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if ((flags & (REG_DEST | REG2_SOURCE)) == (REG_DEST | REG2_SOURCE)) {
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FAIL_IF(push_inst(compiler, SLL | D(dst) | S1(src2) | IMM(16), DR(dst)));
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return push_inst(compiler, (op == SLJIT_MOV_SH ? SRA : SRL) | D(dst) | S1(dst) | IMM(16), DR(dst));
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}
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else if (dst != src2)
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SLJIT_ASSERT_STOP();
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return SLJIT_SUCCESS;
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case SLJIT_NOT:
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SLJIT_ASSERT(src1 == TMP_REG1 && !(flags & SRC2_IMM));
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return push_inst(compiler, XNOR | (flags & SET_FLAGS) | D(dst) | S1(0) | S2(src2), DR(dst) | (flags & SET_FLAGS));
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case SLJIT_CLZ:
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SLJIT_ASSERT(src1 == TMP_REG1 && !(flags & SRC2_IMM));
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/* sparc 32 does not support SLJIT_KEEP_FLAGS. Not sure I can fix this. */
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FAIL_IF(push_inst(compiler, SUB | SET_FLAGS | D(0) | S1(src2) | S2(0), SET_FLAGS));
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FAIL_IF(push_inst(compiler, OR | D(TMP_REG1) | S1(0) | S2(src2), DR(TMP_REG1)));
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FAIL_IF(push_inst(compiler, BICC | DA(0x1) | (7 & DISP_MASK), UNMOVABLE_INS));
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FAIL_IF(push_inst(compiler, OR | (flags & SET_FLAGS) | D(dst) | S1(0) | IMM(32), UNMOVABLE_INS | (flags & SET_FLAGS)));
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FAIL_IF(push_inst(compiler, OR | D(dst) | S1(0) | IMM(-1), DR(dst)));
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/* Loop. */
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FAIL_IF(push_inst(compiler, SUB | SET_FLAGS | D(0) | S1(TMP_REG1) | S2(0), SET_FLAGS));
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FAIL_IF(push_inst(compiler, SLL | D(TMP_REG1) | S1(TMP_REG1) | IMM(1), DR(TMP_REG1)));
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FAIL_IF(push_inst(compiler, BICC | DA(0xe) | (-2 & DISP_MASK), UNMOVABLE_INS));
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return push_inst(compiler, ADD | (flags & SET_FLAGS) | D(dst) | S1(dst) | IMM(1), UNMOVABLE_INS | (flags & SET_FLAGS));
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case SLJIT_ADD:
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return push_inst(compiler, ADD | (flags & SET_FLAGS) | D(dst) | S1(src1) | ARG2(flags, src2), DR(dst) | (flags & SET_FLAGS));
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case SLJIT_ADDC:
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return push_inst(compiler, ADDC | (flags & SET_FLAGS) | D(dst) | S1(src1) | ARG2(flags, src2), DR(dst) | (flags & SET_FLAGS));
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case SLJIT_SUB:
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return push_inst(compiler, SUB | (flags & SET_FLAGS) | D(dst) | S1(src1) | ARG2(flags, src2), DR(dst) | (flags & SET_FLAGS));
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case SLJIT_SUBC:
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return push_inst(compiler, SUBC | (flags & SET_FLAGS) | D(dst) | S1(src1) | ARG2(flags, src2), DR(dst) | (flags & SET_FLAGS));
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case SLJIT_MUL:
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FAIL_IF(push_inst(compiler, SMUL | D(dst) | S1(src1) | ARG2(flags, src2), DR(dst)));
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if (!(flags & SET_FLAGS))
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return SLJIT_SUCCESS;
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FAIL_IF(push_inst(compiler, SRA | D(TMP_REG1) | S1(dst) | IMM(31), DR(TMP_REG1)));
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FAIL_IF(push_inst(compiler, RDY | D(TMP_REG4), DR(TMP_REG4)));
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return push_inst(compiler, SUB | SET_FLAGS | D(0) | S1(TMP_REG1) | S2(TMP_REG4), MOVABLE_INS | SET_FLAGS);
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case SLJIT_AND:
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return push_inst(compiler, AND | (flags & SET_FLAGS) | D(dst) | S1(src1) | ARG2(flags, src2), DR(dst) | (flags & SET_FLAGS));
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case SLJIT_OR:
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return push_inst(compiler, OR | (flags & SET_FLAGS) | D(dst) | S1(src1) | ARG2(flags, src2), DR(dst) | (flags & SET_FLAGS));
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case SLJIT_XOR:
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return push_inst(compiler, XOR | (flags & SET_FLAGS) | D(dst) | S1(src1) | ARG2(flags, src2), DR(dst) | (flags & SET_FLAGS));
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case SLJIT_SHL:
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FAIL_IF(push_inst(compiler, SLL | D(dst) | S1(src1) | ARG2(flags, src2), DR(dst)));
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return !(flags & SET_FLAGS) ? SLJIT_SUCCESS : push_inst(compiler, SUB | SET_FLAGS | D(0) | S1(dst) | S2(0), SET_FLAGS);
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case SLJIT_LSHR:
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FAIL_IF(push_inst(compiler, SRL | D(dst) | S1(src1) | ARG2(flags, src2), DR(dst)));
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return !(flags & SET_FLAGS) ? SLJIT_SUCCESS : push_inst(compiler, SUB | SET_FLAGS | D(0) | S1(dst) | S2(0), SET_FLAGS);
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case SLJIT_ASHR:
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FAIL_IF(push_inst(compiler, SRA | D(dst) | S1(src1) | ARG2(flags, src2), DR(dst)));
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return !(flags & SET_FLAGS) ? SLJIT_SUCCESS : push_inst(compiler, SUB | SET_FLAGS | D(0) | S1(dst) | S2(0), SET_FLAGS);
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}
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SLJIT_ASSERT_STOP();
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return SLJIT_SUCCESS;
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}
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static SLJIT_INLINE sljit_si emit_const(struct sljit_compiler *compiler, sljit_si dst, sljit_sw init_value)
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{
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FAIL_IF(push_inst(compiler, SETHI | D(dst) | ((init_value >> 10) & 0x3fffff), DR(dst)));
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return push_inst(compiler, OR | D(dst) | S1(dst) | IMM_ARG | (init_value & 0x3ff), 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_addr)
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{
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sljit_ins *inst = (sljit_ins*)addr;
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inst[0] = (inst[0] & 0xffc00000) | ((new_addr >> 10) & 0x3fffff);
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inst[1] = (inst[1] & 0xfffffc00) | (new_addr & 0x3ff);
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SLJIT_CACHE_FLUSH(inst, inst + 2);
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}
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SLJIT_API_FUNC_ATTRIBUTE void sljit_set_const(sljit_uw addr, sljit_sw new_constant)
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{
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sljit_ins *inst = (sljit_ins*)addr;
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inst[0] = (inst[0] & 0xffc00000) | ((new_constant >> 10) & 0x3fffff);
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inst[1] = (inst[1] & 0xfffffc00) | (new_constant & 0x3ff);
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SLJIT_CACHE_FLUSH(inst, inst + 2);
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}
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