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pcre2/src/sljit/sljitNativeRISCV_64.c

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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_r, sljit_sw imm, sljit_s32 tmp_r)
{
sljit_sw high;
if (imm <= SIMM_MAX && imm >= SIMM_MIN)
return push_inst(compiler, ADDI | RD(dst_r) | RS1(TMP_ZERO) | IMM_I(imm));
if (imm <= 0x7fffffffl && imm >= S32_MIN) {
if (imm > S32_MAX) {
SLJIT_ASSERT((imm & 0x800) != 0);
FAIL_IF(push_inst(compiler, LUI | RD(dst_r) | (sljit_ins)0x80000000u));
return push_inst(compiler, XORI | RD(dst_r) | RS1(dst_r) | IMM_I(imm));
}
if ((imm & 0x800) != 0)
imm += 0x1000;
FAIL_IF(push_inst(compiler, LUI | RD(dst_r) | (sljit_ins)(imm & ~0xfff)));
if ((imm & 0xfff) == 0)
return SLJIT_SUCCESS;
return push_inst(compiler, ADDI | RD(dst_r) | RS1(dst_r) | IMM_I(imm));
}
/* Trailing zeroes could be used to produce shifted immediates. */
if (imm <= 0x7ffffffffffl && imm >= -0x80000000000l) {
high = imm >> 12;
if (imm & 0x800)
high = ~high;
if (high > S32_MAX) {
SLJIT_ASSERT((high & 0x800) != 0);
FAIL_IF(push_inst(compiler, LUI | RD(dst_r) | (sljit_ins)0x80000000u));
FAIL_IF(push_inst(compiler, XORI | RD(dst_r) | RS1(dst_r) | IMM_I(high)));
} else {
if ((high & 0x800) != 0)
high += 0x1000;
FAIL_IF(push_inst(compiler, LUI | RD(dst_r) | (sljit_ins)(high & ~0xfff)));
if ((high & 0xfff) != 0)
FAIL_IF(push_inst(compiler, ADDI | RD(dst_r) | RS1(dst_r) | IMM_I(high)));
}
FAIL_IF(push_inst(compiler, SLLI | RD(dst_r) | RS1(dst_r) | IMM_I(12)));
if ((imm & 0xfff) != 0)
return push_inst(compiler, XORI | RD(dst_r) | RS1(dst_r) | IMM_I(imm));
return SLJIT_SUCCESS;
}
high = imm >> 32;
imm = (sljit_s32)imm;
if ((imm & 0x80000000l) != 0)
high = ~high;
if (high <= 0x7ffff && high >= -0x80000) {
FAIL_IF(push_inst(compiler, LUI | RD(tmp_r) | (sljit_ins)(high << 12)));
high = 0x1000;
} else {
if ((high & 0x800) != 0)
high += 0x1000;
FAIL_IF(push_inst(compiler, LUI | RD(tmp_r) | (sljit_ins)(high & ~0xfff)));
high &= 0xfff;
}
if (imm <= SIMM_MAX && imm >= SIMM_MIN) {
FAIL_IF(push_inst(compiler, ADDI | RD(dst_r) | RS1(TMP_ZERO) | IMM_I(imm)));
imm = 0;
} else if (imm > S32_MAX) {
SLJIT_ASSERT((imm & 0x800) != 0);
FAIL_IF(push_inst(compiler, LUI | RD(dst_r) | (sljit_ins)0x80000000u));
imm = 0x1000 | (imm & 0xfff);
} else {
if ((imm & 0x800) != 0)
imm += 0x1000;
FAIL_IF(push_inst(compiler, LUI | RD(dst_r) | (sljit_ins)(imm & ~0xfff)));
imm &= 0xfff;
}
if ((high & 0xfff) != 0)
FAIL_IF(push_inst(compiler, ADDI | RD(tmp_r) | RS1(tmp_r) | IMM_I(high)));
if (imm & 0x1000)
FAIL_IF(push_inst(compiler, XORI | RD(dst_r) | RS1(dst_r) | IMM_I(imm)));
else if (imm != 0)
FAIL_IF(push_inst(compiler, ADDI | RD(dst_r) | RS1(dst_r) | IMM_I(imm)));
FAIL_IF(push_inst(compiler, SLLI | RD(tmp_r) | RS1(tmp_r) | IMM_I((high & 0x1000) ? 20 : 32)));
return push_inst(compiler, XOR | RD(dst_r) | RS1(dst_r) | RS2(tmp_r));
}
static SLJIT_INLINE sljit_s32 emit_const(struct sljit_compiler *compiler, sljit_s32 dst, sljit_sw init_value, sljit_ins last_ins)
{
sljit_sw high;
if ((init_value & 0x800) != 0)
init_value += 0x1000;
high = init_value >> 32;
if ((init_value & 0x80000000l) != 0)
high = ~high;
if ((high & 0x800) != 0)
high += 0x1000;
FAIL_IF(push_inst(compiler, LUI | RD(TMP_REG3) | (sljit_ins)(high & ~0xfff)));
FAIL_IF(push_inst(compiler, ADDI | RD(TMP_REG3) | RS1(TMP_REG3) | IMM_I(high)));
FAIL_IF(push_inst(compiler, LUI | RD(dst) | (sljit_ins)(init_value & ~0xfff)));
FAIL_IF(push_inst(compiler, SLLI | RD(TMP_REG3) | RS1(TMP_REG3) | IMM_I(32)));
FAIL_IF(push_inst(compiler, XOR | RD(dst) | RS1(dst) | RS2(TMP_REG3)));
return push_inst(compiler, last_ins | RS1(dst) | IMM_I(init_value));
}
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_sw high;
SLJIT_UNUSED_ARG(executable_offset);
if ((new_target & 0x800) != 0)
new_target += 0x1000;
high = (sljit_sw)new_target >> 32;
if ((new_target & 0x80000000l) != 0)
high = ~high;
if ((high & 0x800) != 0)
high += 0x1000;
SLJIT_UPDATE_WX_FLAGS(inst, inst + 5, 0);
SLJIT_ASSERT((inst[0] & 0x7f) == LUI);
inst[0] = (inst[0] & 0xfff) | (sljit_ins)(high & ~0xfff);
SLJIT_ASSERT((inst[1] & 0x707f) == ADDI);
inst[1] = (inst[1] & 0xfffff) | IMM_I(high);
SLJIT_ASSERT((inst[2] & 0x7f) == LUI);
inst[2] = (inst[2] & 0xfff) | (sljit_ins)((sljit_sw)new_target & ~0xfff);
SLJIT_ASSERT((inst[5] & 0x707f) == ADDI || (inst[5] & 0x707f) == JALR);
inst[5] = (inst[5] & 0xfffff) | IMM_I(new_target);
SLJIT_UPDATE_WX_FLAGS(inst, inst + 5, 1);
inst = (sljit_ins *)SLJIT_ADD_EXEC_OFFSET(inst, executable_offset);
SLJIT_CACHE_FLUSH(inst, inst + 5);
}
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