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Diffstat (limited to 'sljit/sljitNativeMIPS_32.c')
| -rw-r--r-- | sljit/sljitNativeMIPS_32.c | 366 |
1 files changed, 366 insertions, 0 deletions
diff --git a/sljit/sljitNativeMIPS_32.c b/sljit/sljitNativeMIPS_32.c new file mode 100644 index 0000000..b2b60d7 --- /dev/null +++ b/sljit/sljitNativeMIPS_32.c @@ -0,0 +1,366 @@ +/* + * 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. + */ + +/* mips 32-bit arch dependent functions. */ + +static sljit_si load_immediate(struct sljit_compiler *compiler, sljit_si dst_ar, sljit_sw imm) +{ + if (!(imm & ~0xffff)) + return push_inst(compiler, ORI | SA(0) | TA(dst_ar) | IMM(imm), dst_ar); + + if (imm < 0 && imm >= SIMM_MIN) + return push_inst(compiler, ADDIU | SA(0) | TA(dst_ar) | IMM(imm), dst_ar); + + FAIL_IF(push_inst(compiler, LUI | TA(dst_ar) | IMM(imm >> 16), dst_ar)); + return (imm & 0xffff) ? push_inst(compiler, ORI | SA(dst_ar) | TA(dst_ar) | IMM(imm), dst_ar) : SLJIT_SUCCESS; +} + +#define EMIT_LOGICAL(op_imm, op_norm) \ + if (flags & SRC2_IMM) { \ + if (op & SLJIT_SET_E) \ + FAIL_IF(push_inst(compiler, op_imm | S(src1) | TA(EQUAL_FLAG) | IMM(src2), EQUAL_FLAG)); \ + if (CHECK_FLAGS(SLJIT_SET_E)) \ + FAIL_IF(push_inst(compiler, op_imm | S(src1) | T(dst) | IMM(src2), DR(dst))); \ + } \ + else { \ + if (op & SLJIT_SET_E) \ + FAIL_IF(push_inst(compiler, op_norm | S(src1) | T(src2) | DA(EQUAL_FLAG), EQUAL_FLAG)); \ + if (CHECK_FLAGS(SLJIT_SET_E)) \ + FAIL_IF(push_inst(compiler, op_norm | S(src1) | T(src2) | D(dst), DR(dst))); \ + } + +#define EMIT_SHIFT(op_imm, op_v) \ + if (flags & SRC2_IMM) { \ + if (op & SLJIT_SET_E) \ + FAIL_IF(push_inst(compiler, op_imm | T(src1) | DA(EQUAL_FLAG) | SH_IMM(src2), EQUAL_FLAG)); \ + if (CHECK_FLAGS(SLJIT_SET_E)) \ + FAIL_IF(push_inst(compiler, op_imm | T(src1) | D(dst) | SH_IMM(src2), DR(dst))); \ + } \ + else { \ + if (op & SLJIT_SET_E) \ + FAIL_IF(push_inst(compiler, op_v | S(src2) | T(src1) | DA(EQUAL_FLAG), EQUAL_FLAG)); \ + if (CHECK_FLAGS(SLJIT_SET_E)) \ + FAIL_IF(push_inst(compiler, op_v | S(src2) | T(src1) | D(dst), DR(dst))); \ + } + +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_sw src2) +{ + switch (GET_OPCODE(op)) { + case SLJIT_MOV: + case SLJIT_MOV_UI: + case SLJIT_MOV_SI: + case SLJIT_MOV_P: + SLJIT_ASSERT(src1 == TMP_REG1 && !(flags & SRC2_IMM)); + if (dst != src2) + return push_inst(compiler, ADDU | S(src2) | TA(0) | D(dst), DR(dst)); + return SLJIT_SUCCESS; + + case SLJIT_MOV_UB: + case SLJIT_MOV_SB: + SLJIT_ASSERT(src1 == TMP_REG1 && !(flags & SRC2_IMM)); + if ((flags & (REG_DEST | REG2_SOURCE)) == (REG_DEST | REG2_SOURCE)) { + if (op == SLJIT_MOV_SB) { +#if (defined SLJIT_MIPS_R1 && SLJIT_MIPS_R1) + return push_inst(compiler, SEB | T(src2) | D(dst), DR(dst)); +#else + FAIL_IF(push_inst(compiler, SLL | T(src2) | D(dst) | SH_IMM(24), DR(dst))); + return push_inst(compiler, SRA | T(dst) | D(dst) | SH_IMM(24), DR(dst)); +#endif + } + return push_inst(compiler, ANDI | S(src2) | T(dst) | IMM(0xff), DR(dst)); + } + else if (dst != src2) + SLJIT_ASSERT_STOP(); + return SLJIT_SUCCESS; + + case SLJIT_MOV_UH: + case SLJIT_MOV_SH: + SLJIT_ASSERT(src1 == TMP_REG1 && !(flags & SRC2_IMM)); + if ((flags & (REG_DEST | REG2_SOURCE)) == (REG_DEST | REG2_SOURCE)) { + if (op == SLJIT_MOV_SH) { +#if (defined SLJIT_MIPS_R1 && SLJIT_MIPS_R1) + return push_inst(compiler, SEH | T(src2) | D(dst), DR(dst)); +#else + FAIL_IF(push_inst(compiler, SLL | T(src2) | D(dst) | SH_IMM(16), DR(dst))); + return push_inst(compiler, SRA | T(dst) | D(dst) | SH_IMM(16), DR(dst)); +#endif + } + return push_inst(compiler, ANDI | S(src2) | T(dst) | IMM(0xffff), DR(dst)); + } + else if (dst != src2) + SLJIT_ASSERT_STOP(); + return SLJIT_SUCCESS; + + case SLJIT_NOT: + SLJIT_ASSERT(src1 == TMP_REG1 && !(flags & SRC2_IMM)); + if (op & SLJIT_SET_E) + FAIL_IF(push_inst(compiler, NOR | S(src2) | T(src2) | DA(EQUAL_FLAG), EQUAL_FLAG)); + if (CHECK_FLAGS(SLJIT_SET_E)) + FAIL_IF(push_inst(compiler, NOR | S(src2) | T(src2) | D(dst), DR(dst))); + return SLJIT_SUCCESS; + + case SLJIT_CLZ: + SLJIT_ASSERT(src1 == TMP_REG1 && !(flags & SRC2_IMM)); +#if (defined SLJIT_MIPS_R1 && SLJIT_MIPS_R1) + if (op & SLJIT_SET_E) + FAIL_IF(push_inst(compiler, CLZ | S(src2) | TA(EQUAL_FLAG) | DA(EQUAL_FLAG), EQUAL_FLAG)); + if (CHECK_FLAGS(SLJIT_SET_E)) + FAIL_IF(push_inst(compiler, CLZ | S(src2) | T(dst) | D(dst), DR(dst))); +#else + if (SLJIT_UNLIKELY(flags & UNUSED_DEST)) { + FAIL_IF(push_inst(compiler, SRL | T(src2) | DA(EQUAL_FLAG) | SH_IMM(31), EQUAL_FLAG)); + return push_inst(compiler, XORI | SA(EQUAL_FLAG) | TA(EQUAL_FLAG) | IMM(1), EQUAL_FLAG); + } + /* Nearly all instructions are unmovable in the following sequence. */ + FAIL_IF(push_inst(compiler, ADDU | S(src2) | TA(0) | D(TMP_REG1), DR(TMP_REG1))); + /* Check zero. */ + FAIL_IF(push_inst(compiler, BEQ | S(TMP_REG1) | TA(0) | IMM(5), UNMOVABLE_INS)); + FAIL_IF(push_inst(compiler, ORI | SA(0) | T(dst) | IMM(32), UNMOVABLE_INS)); + FAIL_IF(push_inst(compiler, ADDIU | SA(0) | T(dst) | IMM(-1), DR(dst))); + /* Loop for searching the highest bit. */ + FAIL_IF(push_inst(compiler, ADDIU | S(dst) | T(dst) | IMM(1), DR(dst))); + FAIL_IF(push_inst(compiler, BGEZ | S(TMP_REG1) | IMM(-2), UNMOVABLE_INS)); + FAIL_IF(push_inst(compiler, SLL | T(TMP_REG1) | D(TMP_REG1) | SH_IMM(1), UNMOVABLE_INS)); + if (op & SLJIT_SET_E) + return push_inst(compiler, ADDU | S(dst) | TA(0) | DA(EQUAL_FLAG), EQUAL_FLAG); +#endif + return SLJIT_SUCCESS; + + case SLJIT_ADD: + if (flags & SRC2_IMM) { + if (op & SLJIT_SET_O) { + if (src2 >= 0) + FAIL_IF(push_inst(compiler, OR | S(src1) | T(src1) | DA(OVERFLOW_FLAG), OVERFLOW_FLAG)); + else + FAIL_IF(push_inst(compiler, NOR | S(src1) | T(src1) | DA(OVERFLOW_FLAG), OVERFLOW_FLAG)); + } + if (op & SLJIT_SET_E) + FAIL_IF(push_inst(compiler, ADDIU | S(src1) | TA(EQUAL_FLAG) | IMM(src2), EQUAL_FLAG)); + if (op & (SLJIT_SET_C | SLJIT_SET_O)) { + if (src2 >= 0) + FAIL_IF(push_inst(compiler, ORI | S(src1) | TA(ULESS_FLAG) | IMM(src2), ULESS_FLAG)); + else { + FAIL_IF(push_inst(compiler, ADDIU | SA(0) | TA(ULESS_FLAG) | IMM(src2), ULESS_FLAG)); + FAIL_IF(push_inst(compiler, OR | S(src1) | TA(ULESS_FLAG) | DA(ULESS_FLAG), ULESS_FLAG)); + } + } + /* dst may be the same as src1 or src2. */ + if (CHECK_FLAGS(SLJIT_SET_E)) + FAIL_IF(push_inst(compiler, ADDIU | S(src1) | T(dst) | IMM(src2), DR(dst))); + } + else { + if (op & SLJIT_SET_O) + FAIL_IF(push_inst(compiler, XOR | S(src1) | T(src2) | DA(OVERFLOW_FLAG), OVERFLOW_FLAG)); + if (op & SLJIT_SET_E) + FAIL_IF(push_inst(compiler, ADDU | S(src1) | T(src2) | DA(EQUAL_FLAG), EQUAL_FLAG)); + if (op & (SLJIT_SET_C | SLJIT_SET_O)) + FAIL_IF(push_inst(compiler, OR | S(src1) | T(src2) | DA(ULESS_FLAG), ULESS_FLAG)); + /* dst may be the same as src1 or src2. */ + if (CHECK_FLAGS(SLJIT_SET_E)) + FAIL_IF(push_inst(compiler, ADDU | S(src1) | T(src2) | D(dst), DR(dst))); + } + + /* a + b >= a | b (otherwise, the carry should be set to 1). */ + if (op & (SLJIT_SET_C | SLJIT_SET_O)) + FAIL_IF(push_inst(compiler, SLTU | S(dst) | TA(ULESS_FLAG) | DA(ULESS_FLAG), ULESS_FLAG)); + if (!(op & SLJIT_SET_O)) + return SLJIT_SUCCESS; + FAIL_IF(push_inst(compiler, SLL | TA(ULESS_FLAG) | D(TMP_REG1) | SH_IMM(31), DR(TMP_REG1))); + FAIL_IF(push_inst(compiler, XOR | S(TMP_REG1) | TA(OVERFLOW_FLAG) | DA(OVERFLOW_FLAG), OVERFLOW_FLAG)); + FAIL_IF(push_inst(compiler, XOR | S(dst) | TA(OVERFLOW_FLAG) | DA(OVERFLOW_FLAG), OVERFLOW_FLAG)); + return push_inst(compiler, SLL | TA(OVERFLOW_FLAG) | DA(OVERFLOW_FLAG) | SH_IMM(31), OVERFLOW_FLAG); + + case SLJIT_ADDC: + if (flags & SRC2_IMM) { + if (op & SLJIT_SET_C) { + if (src2 >= 0) + FAIL_IF(push_inst(compiler, ORI | S(src1) | TA(OVERFLOW_FLAG) | IMM(src2), OVERFLOW_FLAG)); + else { + FAIL_IF(push_inst(compiler, ADDIU | SA(0) | TA(OVERFLOW_FLAG) | IMM(src2), OVERFLOW_FLAG)); + FAIL_IF(push_inst(compiler, OR | S(src1) | TA(OVERFLOW_FLAG) | DA(OVERFLOW_FLAG), OVERFLOW_FLAG)); + } + } + FAIL_IF(push_inst(compiler, ADDIU | S(src1) | T(dst) | IMM(src2), DR(dst))); + } else { + if (op & SLJIT_SET_C) + FAIL_IF(push_inst(compiler, OR | S(src1) | T(src2) | DA(OVERFLOW_FLAG), OVERFLOW_FLAG)); + /* dst may be the same as src1 or src2. */ + FAIL_IF(push_inst(compiler, ADDU | S(src1) | T(src2) | D(dst), DR(dst))); + } + if (op & SLJIT_SET_C) + FAIL_IF(push_inst(compiler, SLTU | S(dst) | TA(OVERFLOW_FLAG) | DA(OVERFLOW_FLAG), OVERFLOW_FLAG)); + + FAIL_IF(push_inst(compiler, ADDU | S(dst) | TA(ULESS_FLAG) | D(dst), DR(dst))); + if (!(op & SLJIT_SET_C)) + return SLJIT_SUCCESS; + + /* Set ULESS_FLAG (dst == 0) && (ULESS_FLAG == 1). */ + FAIL_IF(push_inst(compiler, SLTU | S(dst) | TA(ULESS_FLAG) | DA(ULESS_FLAG), ULESS_FLAG)); + /* Set carry flag. */ + return push_inst(compiler, OR | SA(ULESS_FLAG) | TA(OVERFLOW_FLAG) | DA(ULESS_FLAG), ULESS_FLAG); + + case SLJIT_SUB: + if ((flags & SRC2_IMM) && ((op & (SLJIT_SET_U | SLJIT_SET_S)) || src2 == SIMM_MIN)) { + FAIL_IF(push_inst(compiler, ADDIU | SA(0) | T(TMP_REG2) | IMM(src2), DR(TMP_REG2))); + src2 = TMP_REG2; + flags &= ~SRC2_IMM; + } + + if (flags & SRC2_IMM) { + if (op & SLJIT_SET_O) { + if (src2 >= 0) + FAIL_IF(push_inst(compiler, OR | S(src1) | T(src1) | DA(OVERFLOW_FLAG), OVERFLOW_FLAG)); + else + FAIL_IF(push_inst(compiler, NOR | S(src1) | T(src1) | DA(OVERFLOW_FLAG), OVERFLOW_FLAG)); + } + if (op & SLJIT_SET_E) + FAIL_IF(push_inst(compiler, ADDIU | S(src1) | TA(EQUAL_FLAG) | IMM(-src2), EQUAL_FLAG)); + if (op & (SLJIT_SET_C | SLJIT_SET_O)) + FAIL_IF(push_inst(compiler, SLTIU | S(src1) | TA(ULESS_FLAG) | IMM(src2), ULESS_FLAG)); + /* dst may be the same as src1 or src2. */ + if (CHECK_FLAGS(SLJIT_SET_E)) + FAIL_IF(push_inst(compiler, ADDIU | S(src1) | T(dst) | IMM(-src2), DR(dst))); + } + else { + if (op & SLJIT_SET_O) + FAIL_IF(push_inst(compiler, XOR | S(src1) | T(src2) | DA(OVERFLOW_FLAG), OVERFLOW_FLAG)); + if (op & SLJIT_SET_E) + FAIL_IF(push_inst(compiler, SUBU | S(src1) | T(src2) | DA(EQUAL_FLAG), EQUAL_FLAG)); + if (op & (SLJIT_SET_U | SLJIT_SET_C | SLJIT_SET_O)) + FAIL_IF(push_inst(compiler, SLTU | S(src1) | T(src2) | DA(ULESS_FLAG), ULESS_FLAG)); + if (op & SLJIT_SET_U) + FAIL_IF(push_inst(compiler, SLTU | S(src2) | T(src1) | DA(UGREATER_FLAG), UGREATER_FLAG)); + if (op & SLJIT_SET_S) { + FAIL_IF(push_inst(compiler, SLT | S(src1) | T(src2) | DA(LESS_FLAG), LESS_FLAG)); + FAIL_IF(push_inst(compiler, SLT | S(src2) | T(src1) | DA(GREATER_FLAG), GREATER_FLAG)); + } + /* dst may be the same as src1 or src2. */ + if (CHECK_FLAGS(SLJIT_SET_E | SLJIT_SET_U | SLJIT_SET_S | SLJIT_SET_C)) + FAIL_IF(push_inst(compiler, SUBU | S(src1) | T(src2) | D(dst), DR(dst))); + } + + if (!(op & SLJIT_SET_O)) + return SLJIT_SUCCESS; + FAIL_IF(push_inst(compiler, SLL | TA(ULESS_FLAG) | D(TMP_REG1) | SH_IMM(31), DR(TMP_REG1))); + FAIL_IF(push_inst(compiler, XOR | S(TMP_REG1) | TA(OVERFLOW_FLAG) | DA(OVERFLOW_FLAG), OVERFLOW_FLAG)); + FAIL_IF(push_inst(compiler, XOR | S(dst) | TA(OVERFLOW_FLAG) | DA(OVERFLOW_FLAG), OVERFLOW_FLAG)); + return push_inst(compiler, SRL | TA(OVERFLOW_FLAG) | DA(OVERFLOW_FLAG) | SH_IMM(31), OVERFLOW_FLAG); + + case SLJIT_SUBC: + if ((flags & SRC2_IMM) && src2 == SIMM_MIN) { + FAIL_IF(push_inst(compiler, ADDIU | SA(0) | T(TMP_REG2) | IMM(src2), DR(TMP_REG2))); + src2 = TMP_REG2; + flags &= ~SRC2_IMM; + } + + if (flags & SRC2_IMM) { + if (op & SLJIT_SET_C) + FAIL_IF(push_inst(compiler, SLTIU | S(src1) | TA(OVERFLOW_FLAG) | IMM(src2), OVERFLOW_FLAG)); + /* dst may be the same as src1 or src2. */ + FAIL_IF(push_inst(compiler, ADDIU | S(src1) | T(dst) | IMM(-src2), DR(dst))); + } + else { + if (op & SLJIT_SET_C) + FAIL_IF(push_inst(compiler, SLTU | S(src1) | T(src2) | DA(OVERFLOW_FLAG), OVERFLOW_FLAG)); + /* dst may be the same as src1 or src2. */ + FAIL_IF(push_inst(compiler, SUBU | S(src1) | T(src2) | D(dst), DR(dst))); + } + + if (op & SLJIT_SET_C) + FAIL_IF(push_inst(compiler, SLTU | S(dst) | TA(ULESS_FLAG) | DA(LESS_FLAG), LESS_FLAG)); + + FAIL_IF(push_inst(compiler, SUBU | S(dst) | TA(ULESS_FLAG) | D(dst), DR(dst))); + return (op & SLJIT_SET_C) ? push_inst(compiler, OR | SA(OVERFLOW_FLAG) | TA(LESS_FLAG) | DA(ULESS_FLAG), ULESS_FLAG) : SLJIT_SUCCESS; + + case SLJIT_MUL: + SLJIT_ASSERT(!(flags & SRC2_IMM)); + if (!(op & SLJIT_SET_O)) { +#if (defined SLJIT_MIPS_R1 && SLJIT_MIPS_R1) + return push_inst(compiler, MUL | S(src1) | T(src2) | D(dst), DR(dst)); +#else + FAIL_IF(push_inst(compiler, MULT | S(src1) | T(src2), MOVABLE_INS)); + return push_inst(compiler, MFLO | D(dst), DR(dst)); +#endif + } + FAIL_IF(push_inst(compiler, MULT | S(src1) | T(src2), MOVABLE_INS)); + FAIL_IF(push_inst(compiler, MFHI | DA(ULESS_FLAG), ULESS_FLAG)); + FAIL_IF(push_inst(compiler, MFLO | D(dst), DR(dst))); + FAIL_IF(push_inst(compiler, SRA | T(dst) | DA(UGREATER_FLAG) | SH_IMM(31), UGREATER_FLAG)); + return push_inst(compiler, SUBU | SA(ULESS_FLAG) | TA(UGREATER_FLAG) | DA(OVERFLOW_FLAG), OVERFLOW_FLAG); + + case SLJIT_AND: + EMIT_LOGICAL(ANDI, AND); + return SLJIT_SUCCESS; + + case SLJIT_OR: + EMIT_LOGICAL(ORI, OR); + return SLJIT_SUCCESS; + + case SLJIT_XOR: + EMIT_LOGICAL(XORI, XOR); + return SLJIT_SUCCESS; + + case SLJIT_SHL: + EMIT_SHIFT(SLL, SLLV); + return SLJIT_SUCCESS; + + case SLJIT_LSHR: + EMIT_SHIFT(SRL, SRLV); + return SLJIT_SUCCESS; + + case SLJIT_ASHR: + EMIT_SHIFT(SRA, SRAV); + return SLJIT_SUCCESS; + } + + SLJIT_ASSERT_STOP(); + return SLJIT_SUCCESS; +} + +static SLJIT_INLINE sljit_si emit_const(struct sljit_compiler *compiler, sljit_si dst, sljit_sw init_value) +{ + FAIL_IF(push_inst(compiler, LUI | T(dst) | IMM(init_value >> 16), DR(dst))); + return push_inst(compiler, ORI | S(dst) | T(dst) | IMM(init_value), DR(dst)); +} + +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); +} |