223 lines
7 KiB
C
223 lines
7 KiB
C
/*
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* Stack-less Just-In-Time compiler
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*
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* Copyright 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_s32 load_immediate(struct sljit_compiler *compiler, sljit_s32 dst_r, sljit_sw imm, sljit_s32 tmp_r)
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{
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sljit_sw high;
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if (imm <= SIMM_MAX && imm >= SIMM_MIN)
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return push_inst(compiler, ADDI | RD(dst_r) | RS1(TMP_ZERO) | IMM_I(imm));
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if (imm <= 0x7fffffffl && imm >= S32_MIN) {
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if (imm > S32_MAX) {
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SLJIT_ASSERT((imm & 0x800) != 0);
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FAIL_IF(push_inst(compiler, LUI | RD(dst_r) | (sljit_ins)0x80000000u));
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return push_inst(compiler, XORI | RD(dst_r) | RS1(dst_r) | IMM_I(imm));
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}
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if ((imm & 0x800) != 0)
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imm += 0x1000;
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FAIL_IF(push_inst(compiler, LUI | RD(dst_r) | (sljit_ins)(imm & ~0xfff)));
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if ((imm & 0xfff) == 0)
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return SLJIT_SUCCESS;
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return push_inst(compiler, ADDI | RD(dst_r) | RS1(dst_r) | IMM_I(imm));
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}
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/* Trailing zeroes could be used to produce shifted immediates. */
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if (imm <= 0x7ffffffffffl && imm >= -0x80000000000l) {
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high = imm >> 12;
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if (imm & 0x800)
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high = ~high;
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if (high > S32_MAX) {
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SLJIT_ASSERT((high & 0x800) != 0);
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FAIL_IF(push_inst(compiler, LUI | RD(dst_r) | (sljit_ins)0x80000000u));
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FAIL_IF(push_inst(compiler, XORI | RD(dst_r) | RS1(dst_r) | IMM_I(high)));
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} else {
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if ((high & 0x800) != 0)
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high += 0x1000;
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FAIL_IF(push_inst(compiler, LUI | RD(dst_r) | (sljit_ins)(high & ~0xfff)));
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if ((high & 0xfff) != 0)
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FAIL_IF(push_inst(compiler, ADDI | RD(dst_r) | RS1(dst_r) | IMM_I(high)));
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}
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FAIL_IF(push_inst(compiler, SLLI | RD(dst_r) | RS1(dst_r) | IMM_I(12)));
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if ((imm & 0xfff) != 0)
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return push_inst(compiler, XORI | RD(dst_r) | RS1(dst_r) | IMM_I(imm));
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return SLJIT_SUCCESS;
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}
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SLJIT_ASSERT(dst_r != tmp_r);
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high = imm >> 32;
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imm = (sljit_s32)imm;
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if ((imm & 0x80000000l) != 0)
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high = ~high;
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if (high <= 0x7ffff && high >= -0x80000) {
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FAIL_IF(push_inst(compiler, LUI | RD(tmp_r) | (sljit_ins)(high << 12)));
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high = 0x1000;
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} else {
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if ((high & 0x800) != 0)
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high += 0x1000;
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FAIL_IF(push_inst(compiler, LUI | RD(tmp_r) | (sljit_ins)(high & ~0xfff)));
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high &= 0xfff;
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}
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if (imm <= SIMM_MAX && imm >= SIMM_MIN) {
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FAIL_IF(push_inst(compiler, ADDI | RD(dst_r) | RS1(TMP_ZERO) | IMM_I(imm)));
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imm = 0;
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} else if (imm > S32_MAX) {
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SLJIT_ASSERT((imm & 0x800) != 0);
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FAIL_IF(push_inst(compiler, LUI | RD(dst_r) | (sljit_ins)0x80000000u));
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imm = 0x1000 | (imm & 0xfff);
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} else {
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if ((imm & 0x800) != 0)
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imm += 0x1000;
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FAIL_IF(push_inst(compiler, LUI | RD(dst_r) | (sljit_ins)(imm & ~0xfff)));
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imm &= 0xfff;
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}
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if ((high & 0xfff) != 0)
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FAIL_IF(push_inst(compiler, ADDI | RD(tmp_r) | RS1(tmp_r) | IMM_I(high)));
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if (imm & 0x1000)
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FAIL_IF(push_inst(compiler, XORI | RD(dst_r) | RS1(dst_r) | IMM_I(imm)));
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else if (imm != 0)
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FAIL_IF(push_inst(compiler, ADDI | RD(dst_r) | RS1(dst_r) | IMM_I(imm)));
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FAIL_IF(push_inst(compiler, SLLI | RD(tmp_r) | RS1(tmp_r) | IMM_I((high & 0x1000) ? 20 : 32)));
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return push_inst(compiler, XOR | RD(dst_r) | RS1(dst_r) | RS2(tmp_r));
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}
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SLJIT_API_FUNC_ATTRIBUTE sljit_s32 sljit_emit_fset64(struct sljit_compiler *compiler,
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sljit_s32 freg, sljit_f64 value)
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{
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union {
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sljit_sw imm;
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sljit_f64 value;
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} u;
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CHECK_ERROR();
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CHECK(check_sljit_emit_fset64(compiler, freg, value));
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u.value = value;
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if (u.imm == 0)
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return push_inst(compiler, FMV_W_X | (1 << 25) | RS1(TMP_ZERO) | FRD(freg));
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FAIL_IF(load_immediate(compiler, TMP_REG1, u.imm, TMP_REG3));
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return push_inst(compiler, FMV_W_X | (1 << 25) | RS1(TMP_REG1) | FRD(freg));
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}
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SLJIT_API_FUNC_ATTRIBUTE sljit_s32 sljit_emit_fcopy(struct sljit_compiler *compiler, sljit_s32 op,
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sljit_s32 freg, sljit_s32 reg)
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{
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sljit_ins inst;
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CHECK_ERROR();
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CHECK(check_sljit_emit_fcopy(compiler, op, freg, reg));
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if (GET_OPCODE(op) == SLJIT_COPY_TO_F64)
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inst = FMV_W_X | RS1(reg) | FRD(freg);
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else
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inst = FMV_X_W | FRS1(freg) | RD(reg);
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if (!(op & SLJIT_32))
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inst |= (sljit_ins)1 << 25;
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return push_inst(compiler, inst);
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}
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static SLJIT_INLINE sljit_s32 emit_const(struct sljit_compiler *compiler, sljit_s32 dst, sljit_sw init_value, sljit_ins last_ins)
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{
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sljit_sw high;
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if ((init_value & 0x800) != 0)
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init_value += 0x1000;
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high = init_value >> 32;
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if ((init_value & 0x80000000l) != 0)
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high = ~high;
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if ((high & 0x800) != 0)
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high += 0x1000;
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FAIL_IF(push_inst(compiler, LUI | RD(TMP_REG3) | (sljit_ins)(high & ~0xfff)));
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FAIL_IF(push_inst(compiler, ADDI | RD(TMP_REG3) | RS1(TMP_REG3) | IMM_I(high)));
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FAIL_IF(push_inst(compiler, LUI | RD(dst) | (sljit_ins)(init_value & ~0xfff)));
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FAIL_IF(push_inst(compiler, SLLI | RD(TMP_REG3) | RS1(TMP_REG3) | IMM_I(32)));
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FAIL_IF(push_inst(compiler, XOR | RD(dst) | RS1(dst) | RS2(TMP_REG3)));
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return push_inst(compiler, last_ins | RS1(dst) | IMM_I(init_value));
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}
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SLJIT_API_FUNC_ATTRIBUTE void sljit_set_jump_addr(sljit_uw addr, sljit_uw new_target, sljit_sw executable_offset)
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{
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sljit_ins *inst = (sljit_ins*)addr;
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sljit_sw high;
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SLJIT_UNUSED_ARG(executable_offset);
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if ((new_target & 0x800) != 0)
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new_target += 0x1000;
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high = (sljit_sw)new_target >> 32;
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if ((new_target & 0x80000000l) != 0)
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high = ~high;
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if ((high & 0x800) != 0)
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high += 0x1000;
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SLJIT_UPDATE_WX_FLAGS(inst, inst + 5, 0);
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SLJIT_ASSERT((inst[0] & 0x7f) == LUI);
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inst[0] = (inst[0] & 0xfff) | (sljit_ins)(high & ~0xfff);
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SLJIT_ASSERT((inst[1] & 0x707f) == ADDI);
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inst[1] = (inst[1] & 0xfffff) | IMM_I(high);
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SLJIT_ASSERT((inst[2] & 0x7f) == LUI);
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inst[2] = (inst[2] & 0xfff) | (sljit_ins)((sljit_sw)new_target & ~0xfff);
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SLJIT_ASSERT((inst[5] & 0x707f) == ADDI || (inst[5] & 0x707f) == JALR);
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inst[5] = (inst[5] & 0xfffff) | IMM_I(new_target);
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SLJIT_UPDATE_WX_FLAGS(inst, inst + 5, 1);
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inst = (sljit_ins *)SLJIT_ADD_EXEC_OFFSET(inst, executable_offset);
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SLJIT_CACHE_FLUSH(inst, inst + 5);
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}
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