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/*
* 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.
*/
static sljit_s32 load_immediate(struct sljit_compiler *compiler, sljit_s32 dst, sljit_sw imm)
{
if (imm <= SIMM_MAX && imm >= SIMM_MIN)
return push_inst(compiler, OR | D(dst) | S1(0) | IMM(imm), DR(dst));
FAIL_IF(push_inst(compiler, SETHI | D(dst) | ((imm >> 10) & 0x3fffff), DR(dst)));
return (imm & 0x3ff) ? push_inst(compiler, OR | D(dst) | S1(dst) | IMM_ARG | (imm & 0x3ff), DR(dst)) : SLJIT_SUCCESS;
}
#define ARG2(flags, src2) ((flags & SRC2_IMM) ? IMM(src2) : S2(src2))
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_sw src2)
{
SLJIT_COMPILE_ASSERT(ICC_IS_SET == SET_FLAGS, icc_is_set_and_set_flags_must_be_the_same);
switch (op) {
case SLJIT_MOV:
case SLJIT_MOV_U32:
case SLJIT_MOV_S32:
case SLJIT_MOV_P:
SLJIT_ASSERT(src1 == TMP_REG1 && !(flags & SRC2_IMM));
if (dst != src2)
return push_inst(compiler, OR | D(dst) | S1(0) | S2(src2), DR(dst));
return SLJIT_SUCCESS;
case SLJIT_MOV_U8:
case SLJIT_MOV_S8:
SLJIT_ASSERT(src1 == TMP_REG1 && !(flags & SRC2_IMM));
if ((flags & (REG_DEST | REG2_SOURCE)) == (REG_DEST | REG2_SOURCE)) {
if (op == SLJIT_MOV_U8)
return push_inst(compiler, AND | D(dst) | S1(src2) | IMM(0xff), DR(dst));
FAIL_IF(push_inst(compiler, SLL | D(dst) | S1(src2) | IMM(24), DR(dst)));
return push_inst(compiler, SRA | D(dst) | S1(dst) | IMM(24), DR(dst));
}
else if (dst != src2)
SLJIT_UNREACHABLE();
return SLJIT_SUCCESS;
case SLJIT_MOV_U16:
case SLJIT_MOV_S16:
SLJIT_ASSERT(src1 == TMP_REG1 && !(flags & SRC2_IMM));
if ((flags & (REG_DEST | REG2_SOURCE)) == (REG_DEST | REG2_SOURCE)) {
FAIL_IF(push_inst(compiler, SLL | D(dst) | S1(src2) | IMM(16), DR(dst)));
return push_inst(compiler, (op == SLJIT_MOV_S16 ? SRA : SRL) | D(dst) | S1(dst) | IMM(16), DR(dst));
}
else if (dst != src2)
SLJIT_UNREACHABLE();
return SLJIT_SUCCESS;
case SLJIT_NOT:
SLJIT_ASSERT(src1 == TMP_REG1 && !(flags & SRC2_IMM));
return push_inst(compiler, XNOR | (flags & SET_FLAGS) | D(dst) | S1(0) | S2(src2), DR(dst) | (flags & SET_FLAGS));
case SLJIT_CLZ:
SLJIT_ASSERT(src1 == TMP_REG1 && !(flags & SRC2_IMM));
FAIL_IF(push_inst(compiler, SUB | SET_FLAGS | D(0) | S1(src2) | S2(0), SET_FLAGS));
FAIL_IF(push_inst(compiler, OR | D(TMP_REG1) | S1(0) | S2(src2), DR(TMP_REG1)));
FAIL_IF(push_inst(compiler, BICC | DA(0x1) | (7 & DISP_MASK), UNMOVABLE_INS));
FAIL_IF(push_inst(compiler, OR | D(dst) | S1(0) | IMM(32), UNMOVABLE_INS));
FAIL_IF(push_inst(compiler, OR | D(dst) | S1(0) | IMM(-1), DR(dst)));
/* Loop. */
FAIL_IF(push_inst(compiler, SUB | SET_FLAGS | D(0) | S1(TMP_REG1) | S2(0), SET_FLAGS));
FAIL_IF(push_inst(compiler, SLL | D(TMP_REG1) | S1(TMP_REG1) | IMM(1), DR(TMP_REG1)));
FAIL_IF(push_inst(compiler, BICC | DA(0xe) | (-2 & DISP_MASK), UNMOVABLE_INS));
return push_inst(compiler, ADD | D(dst) | S1(dst) | IMM(1), UNMOVABLE_INS);
case SLJIT_ADD:
compiler->status_flags_state = SLJIT_CURRENT_FLAGS_ADD_SUB;
return push_inst(compiler, ADD | (flags & SET_FLAGS) | D(dst) | S1(src1) | ARG2(flags, src2), DR(dst) | (flags & SET_FLAGS));
case SLJIT_ADDC:
return push_inst(compiler, ADDC | (flags & SET_FLAGS) | D(dst) | S1(src1) | ARG2(flags, src2), DR(dst) | (flags & SET_FLAGS));
case SLJIT_SUB:
compiler->status_flags_state = SLJIT_CURRENT_FLAGS_ADD_SUB;
return push_inst(compiler, SUB | (flags & SET_FLAGS) | D(dst) | S1(src1) | ARG2(flags, src2), DR(dst) | (flags & SET_FLAGS));
case SLJIT_SUBC:
return push_inst(compiler, SUBC | (flags & SET_FLAGS) | D(dst) | S1(src1) | ARG2(flags, src2), DR(dst) | (flags & SET_FLAGS));
case SLJIT_MUL:
compiler->status_flags_state = 0;
FAIL_IF(push_inst(compiler, SMUL | D(dst) | S1(src1) | ARG2(flags, src2), DR(dst)));
if (!(flags & SET_FLAGS))
return SLJIT_SUCCESS;
FAIL_IF(push_inst(compiler, SRA | D(TMP_REG1) | S1(dst) | IMM(31), DR(TMP_REG1)));
FAIL_IF(push_inst(compiler, RDY | D(TMP_LINK), DR(TMP_LINK)));
return push_inst(compiler, SUB | SET_FLAGS | D(0) | S1(TMP_REG1) | S2(TMP_LINK), MOVABLE_INS | SET_FLAGS);
case SLJIT_AND:
return push_inst(compiler, AND | (flags & SET_FLAGS) | D(dst) | S1(src1) | ARG2(flags, src2), DR(dst) | (flags & SET_FLAGS));
case SLJIT_OR:
return push_inst(compiler, OR | (flags & SET_FLAGS) | D(dst) | S1(src1) | ARG2(flags, src2), DR(dst) | (flags & SET_FLAGS));
case SLJIT_XOR:
return push_inst(compiler, XOR | (flags & SET_FLAGS) | D(dst) | S1(src1) | ARG2(flags, src2), DR(dst) | (flags & SET_FLAGS));
case SLJIT_SHL:
FAIL_IF(push_inst(compiler, SLL | D(dst) | S1(src1) | ARG2(flags, src2), DR(dst)));
return !(flags & SET_FLAGS) ? SLJIT_SUCCESS : push_inst(compiler, SUB | SET_FLAGS | D(0) | S1(dst) | S2(0), SET_FLAGS);
case SLJIT_LSHR:
FAIL_IF(push_inst(compiler, SRL | D(dst) | S1(src1) | ARG2(flags, src2), DR(dst)));
return !(flags & SET_FLAGS) ? SLJIT_SUCCESS : push_inst(compiler, SUB | SET_FLAGS | D(0) | S1(dst) | S2(0), SET_FLAGS);
case SLJIT_ASHR:
FAIL_IF(push_inst(compiler, SRA | D(dst) | S1(src1) | ARG2(flags, src2), DR(dst)));
return !(flags & SET_FLAGS) ? SLJIT_SUCCESS : push_inst(compiler, SUB | SET_FLAGS | D(0) | S1(dst) | S2(0), SET_FLAGS);
}
SLJIT_UNREACHABLE();
return SLJIT_SUCCESS;
}
static sljit_s32 call_with_args(struct sljit_compiler *compiler, sljit_s32 arg_types, sljit_s32 *src)
{
sljit_s32 reg_index = 8;
sljit_s32 word_reg_index = 8;
sljit_s32 float_arg_index = 1;
sljit_s32 double_arg_count = 0;
sljit_s32 float_offset = (16 + 6) * sizeof(sljit_sw);
sljit_s32 types = 0;
sljit_s32 reg = 0;
sljit_s32 move_to_tmp2 = 0;
if (src)
reg = reg_map[*src & REG_MASK];
arg_types >>= SLJIT_DEF_SHIFT;
while (arg_types) {
types = (types << SLJIT_DEF_SHIFT) | (arg_types & SLJIT_DEF_MASK);
switch (arg_types & SLJIT_DEF_MASK) {
case SLJIT_ARG_TYPE_F32:
float_arg_index++;
if (reg_index == reg)
move_to_tmp2 = 1;
reg_index++;
break;
case SLJIT_ARG_TYPE_F64:
float_arg_index++;
double_arg_count++;
if (reg_index == reg || reg_index + 1 == reg)
move_to_tmp2 = 1;
reg_index += 2;
break;
default:
if (reg_index != word_reg_index && reg_index < 14 && reg_index == reg)
move_to_tmp2 = 1;
reg_index++;
word_reg_index++;
break;
}
if (move_to_tmp2) {
move_to_tmp2 = 0;
if (reg < 14)
FAIL_IF(push_inst(compiler, OR | D(TMP_REG1) | S1(0) | S2A(reg), DR(TMP_REG1)));
*src = TMP_REG1;
}
arg_types >>= SLJIT_DEF_SHIFT;
}
arg_types = types;
while (arg_types) {
switch (arg_types & SLJIT_DEF_MASK) {
case SLJIT_ARG_TYPE_F32:
float_arg_index--;
FAIL_IF(push_inst(compiler, STF | FD(float_arg_index) | S1(SLJIT_SP) | IMM(float_offset), MOVABLE_INS));
float_offset -= sizeof(sljit_f64);
break;
case SLJIT_ARG_TYPE_F64:
float_arg_index--;
if (float_arg_index == 4 && double_arg_count == 4) {
FAIL_IF(push_inst(compiler, STF | FD(float_arg_index) | S1(SLJIT_SP) | IMM((16 + 7) * sizeof(sljit_sw)), MOVABLE_INS));
FAIL_IF(push_inst(compiler, STF | FD(float_arg_index) | (1 << 25) | S1(SLJIT_SP) | IMM((16 + 8) * sizeof(sljit_sw)), MOVABLE_INS));
}
else
FAIL_IF(push_inst(compiler, STDF | FD(float_arg_index) | S1(SLJIT_SP) | IMM(float_offset), MOVABLE_INS));
float_offset -= sizeof(sljit_f64);
break;
default:
break;
}
arg_types >>= SLJIT_DEF_SHIFT;
}
float_offset = (16 + 6) * sizeof(sljit_sw);
while (types) {
switch (types & SLJIT_DEF_MASK) {
case SLJIT_ARG_TYPE_F32:
reg_index--;
if (reg_index < 14)
FAIL_IF(push_inst(compiler, LDUW | DA(reg_index) | S1(SLJIT_SP) | IMM(float_offset), reg_index));
float_offset -= sizeof(sljit_f64);
break;
case SLJIT_ARG_TYPE_F64:
reg_index -= 2;
if (reg_index < 14) {
if ((reg_index & 0x1) != 0) {
FAIL_IF(push_inst(compiler, LDUW | DA(reg_index) | S1(SLJIT_SP) | IMM(float_offset), reg_index));
if (reg_index < 13)
FAIL_IF(push_inst(compiler, LDUW | DA(reg_index + 1) | S1(SLJIT_SP) | IMM(float_offset + sizeof(sljit_sw)), reg_index + 1));
}
else
FAIL_IF(push_inst(compiler, LDD | DA(reg_index) | S1(SLJIT_SP) | IMM(float_offset), reg_index));
}
float_offset -= sizeof(sljit_f64);
break;
default:
reg_index--;
word_reg_index--;
if (reg_index != word_reg_index) {
if (reg_index < 14)
FAIL_IF(push_inst(compiler, OR | DA(reg_index) | S1(0) | S2A(word_reg_index), reg_index));
else
FAIL_IF(push_inst(compiler, STW | DA(word_reg_index) | S1(SLJIT_SP) | IMM(92), word_reg_index));
}
break;
}
types >>= SLJIT_DEF_SHIFT;
}
return SLJIT_SUCCESS;
}
static SLJIT_INLINE sljit_s32 emit_const(struct sljit_compiler *compiler, sljit_s32 dst, sljit_sw init_value)
{
FAIL_IF(push_inst(compiler, SETHI | D(dst) | ((init_value >> 10) & 0x3fffff), DR(dst)));
return push_inst(compiler, OR | D(dst) | S1(dst) | IMM_ARG | (init_value & 0x3ff), 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 + 2, 0);
SLJIT_ASSERT(((inst[0] & 0xc1c00000) == 0x01000000) && ((inst[1] & 0xc1f82000) == 0x80102000));
inst[0] = (inst[0] & 0xffc00000) | ((new_target >> 10) & 0x3fffff);
inst[1] = (inst[1] & 0xfffffc00) | (new_target & 0x3ff);
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, new_constant, executable_offset);
}
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