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/*
* Stack-less Just-In-Time compiler
*
* Copyright 2009-2012 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_si load_immediate(struct sljit_compiler *compiler, sljit_si 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_si emit_single_op(struct sljit_compiler *compiler, sljit_si op, sljit_si flags,
sljit_si dst, sljit_si src1, sljit_si src2)
{
switch (op) {
case SLJIT_MOV:
case SLJIT_MOV_UI:
case SLJIT_MOV_SI:
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_UB:
case SLJIT_MOV_SB:
SLJIT_ASSERT(src1 == TMP_REG1);
if ((flags & (REG_DEST | REG2_SOURCE)) == (REG_DEST | REG2_SOURCE)) {
if (op == SLJIT_MOV_SB)
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_SB)
return push_inst(compiler, EXTSB | S(src2) | A(dst));
else {
SLJIT_ASSERT(dst == src2);
}
return SLJIT_SUCCESS;
case SLJIT_MOV_UH:
case SLJIT_MOV_SH:
SLJIT_ASSERT(src1 == TMP_REG1);
if ((flags & (REG_DEST | REG2_SOURCE)) == (REG_DEST | REG2_SOURCE)) {
if (op == SLJIT_MOV_SH)
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_NEG:
SLJIT_ASSERT(src1 == TMP_REG1);
return push_inst(compiler, NEG | OERC(flags) | D(dst) | A(src2));
case SLJIT_CLZ:
SLJIT_ASSERT(src1 == TMP_REG1);
return push_inst(compiler, CNTLZW | RC(flags) | S(src2) | A(dst));
case SLJIT_ADD:
if (flags & ALT_FORM1) {
/* Flags does not set: BIN_IMM_EXTS unnecessary. */
SLJIT_ASSERT(src2 == TMP_REG2);
return push_inst(compiler, ADDI | D(dst) | A(src1) | compiler->imm);
}
if (flags & ALT_FORM2) {
/* Flags does not set: BIN_IMM_EXTS unnecessary. */
SLJIT_ASSERT(src2 == TMP_REG2);
return push_inst(compiler, ADDIS | D(dst) | A(src1) | compiler->imm);
}
if (flags & ALT_FORM3) {
SLJIT_ASSERT(src2 == TMP_REG2);
return push_inst(compiler, ADDIC | D(dst) | A(src1) | compiler->imm);
}
if (flags & ALT_FORM4) {
/* Flags does not set: BIN_IMM_EXTS unnecessary. */
FAIL_IF(push_inst(compiler, ADDI | D(dst) | A(src1) | (compiler->imm & 0xffff)));
return push_inst(compiler, ADDIS | D(dst) | A(dst) | (((compiler->imm >> 16) & 0xffff) + ((compiler->imm >> 15) & 0x1)));
}
if (!(flags & ALT_SET_FLAGS))
return push_inst(compiler, ADD | D(dst) | A(src1) | B(src2));
return push_inst(compiler, ADDC | OERC(ALT_SET_FLAGS) | D(dst) | A(src1) | B(src2));
case SLJIT_ADDC:
if (flags & ALT_FORM1) {
FAIL_IF(push_inst(compiler, MFXER | D(0)));
FAIL_IF(push_inst(compiler, ADDE | D(dst) | A(src1) | B(src2)));
return push_inst(compiler, MTXER | S(0));
}
return push_inst(compiler, ADDE | D(dst) | A(src1) | B(src2));
case SLJIT_SUB:
if (flags & ALT_FORM1) {
/* 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_FORM2 | ALT_FORM3)) {
SLJIT_ASSERT(src2 == TMP_REG2);
if (flags & ALT_FORM2)
FAIL_IF(push_inst(compiler, CMPI | CRD(0) | A(src1) | compiler->imm));
if (flags & ALT_FORM3)
return push_inst(compiler, CMPLI | CRD(4) | A(src1) | compiler->imm);
return SLJIT_SUCCESS;
}
if (flags & (ALT_FORM4 | ALT_FORM5)) {
if (flags & ALT_FORM4)
FAIL_IF(push_inst(compiler, CMPL | CRD(4) | A(src1) | B(src2)));
if (flags & ALT_FORM5)
FAIL_IF(push_inst(compiler, CMP | CRD(0) | A(src1) | B(src2)));
return SLJIT_SUCCESS;
}
if (!(flags & ALT_SET_FLAGS))
return push_inst(compiler, SUBF | D(dst) | A(src2) | B(src1));
if (flags & ALT_FORM6)
FAIL_IF(push_inst(compiler, CMPL | CRD(4) | A(src1) | B(src2)));
return push_inst(compiler, SUBFC | OERC(ALT_SET_FLAGS) | D(dst) | A(src2) | B(src1));
case SLJIT_SUBC:
if (flags & ALT_FORM1) {
FAIL_IF(push_inst(compiler, MFXER | D(0)));
FAIL_IF(push_inst(compiler, SUBFE | D(dst) | A(src2) | B(src1)));
return push_inst(compiler, MTXER | S(0));
}
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 | OERC(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_FORM3)
FAIL_IF(push_inst(compiler, MFXER | D(0)));
if (flags & ALT_FORM1) {
SLJIT_ASSERT(src2 == TMP_REG2);
compiler->imm &= 0x1f;
FAIL_IF(push_inst(compiler, SRAWI | RC(flags) | S(src1) | A(dst) | (compiler->imm << 11)));
}
else
FAIL_IF(push_inst(compiler, SRAW | RC(flags) | S(src1) | A(dst) | B(src2)));
return (flags & ALT_FORM3) ? push_inst(compiler, MTXER | S(0)) : SLJIT_SUCCESS;
}
SLJIT_ASSERT_STOP();
return SLJIT_SUCCESS;
}
static SLJIT_INLINE sljit_si emit_const(struct sljit_compiler *compiler, sljit_si 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_addr)
{
sljit_ins *inst = (sljit_ins*)addr;
inst[0] = (inst[0] & 0xffff0000) | ((new_addr >> 16) & 0xffff);
inst[1] = (inst[1] & 0xffff0000) | (new_addr & 0xffff);
SLJIT_CACHE_FLUSH(inst, inst + 2);
}
SLJIT_API_FUNC_ATTRIBUTE void sljit_set_const(sljit_uw addr, sljit_sw new_constant)
{
sljit_ins *inst = (sljit_ins*)addr;
inst[0] = (inst[0] & 0xffff0000) | ((new_constant >> 16) & 0xffff);
inst[1] = (inst[1] & 0xffff0000) | (new_constant & 0xffff);
SLJIT_CACHE_FLUSH(inst, inst + 2);
}
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