| /* |
| * 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; |
| |
| SLJIT_ASSERT(dst_r != tmp_r); |
| |
| 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); |
| } |