sljitNativeRISCV_32.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_UNUSED_ARG(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 & 0x800)
        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));
}
 
SLJIT_API_FUNC_ATTRIBUTE sljit_s32 sljit_emit_fset64(struct sljit_compiler *compiler,
    sljit_s32 freg, sljit_f64 value)
{
    union {
        sljit_s32 imm[2];
        sljit_f64 value;
    } u;
 
    CHECK_ERROR();
    CHECK(check_sljit_emit_fset64(compiler, freg, value));
 
    u.value = value;
 
    if (u.imm[0] != 0)
        FAIL_IF(load_immediate(compiler, TMP_REG1, u.imm[0], TMP_REG3));
    if (u.imm[1] != 0)
        FAIL_IF(load_immediate(compiler, TMP_REG2, u.imm[1], TMP_REG3));
 
    FAIL_IF(push_inst(compiler, ADDI | RD(SLJIT_SP) | RS1(SLJIT_SP) | IMM_I(-16)));
    FAIL_IF(push_inst(compiler, SW | RS1(SLJIT_SP) | RS2(u.imm[0] != 0 ? TMP_REG1 : TMP_ZERO) | (8 << 7)));
    FAIL_IF(push_inst(compiler, SW | RS1(SLJIT_SP) | RS2(u.imm[1] != 0 ? TMP_REG2 : TMP_ZERO) | (12 << 7)));
    FAIL_IF(push_inst(compiler, FLD | FRD(freg) | RS1(SLJIT_SP) | IMM_I(8)));
    return push_inst(compiler, ADDI | RD(SLJIT_SP) | RS1(SLJIT_SP) | IMM_I(16));
}
 
SLJIT_API_FUNC_ATTRIBUTE sljit_s32 sljit_emit_fcopy(struct sljit_compiler *compiler, sljit_s32 op,
    sljit_s32 freg, sljit_s32 reg)
{
    sljit_ins inst;
    sljit_s32 reg2 = 0;
 
    CHECK_ERROR();
    CHECK(check_sljit_emit_fcopy(compiler, op, freg, reg));
 
    if (op & SLJIT_32) {
        if (op == SLJIT_COPY32_TO_F32)
            inst = FMV_W_X | RS1(reg) | FRD(freg);
        else
            inst = FMV_X_W | FRS1(freg) | RD(reg);
 
        return push_inst(compiler, inst);
    }
 
    FAIL_IF(push_inst(compiler, ADDI | RD(SLJIT_SP) | RS1(SLJIT_SP) | IMM_I(-16)));
 
    if (reg & REG_PAIR_MASK) {
        reg2 = REG_PAIR_SECOND(reg);
        reg = REG_PAIR_FIRST(reg);
    }
 
    if (op == SLJIT_COPY_TO_F64) {
        if (reg2 != 0)
            FAIL_IF(push_inst(compiler, SW | RS1(SLJIT_SP) | RS2(reg2) | (8 << 7)));
        else
            FAIL_IF(push_inst(compiler, FSW | RS1(SLJIT_SP) | FRS2(freg) | (8 << 7)));
 
        FAIL_IF(push_inst(compiler, SW | RS1(SLJIT_SP) | RS2(reg) | (12 << 7)));
        FAIL_IF(push_inst(compiler, FLD | FRD(freg) | RS1(SLJIT_SP) | IMM_I(8)));
    } else {
        FAIL_IF(push_inst(compiler, FSD | RS1(SLJIT_SP) | FRS2(freg) | (8 << 7)));
 
        if (reg2 != 0)
            FAIL_IF(push_inst(compiler, FMV_X_W | FRS1(freg) | RD(reg2)));
 
        FAIL_IF(push_inst(compiler, LW | RD(reg) | RS1(SLJIT_SP) | IMM_I(12)));
    }
 
    return push_inst(compiler, ADDI | RD(SLJIT_SP) | RS1(SLJIT_SP) | IMM_I(16));
}
 
static SLJIT_INLINE sljit_s32 emit_const(struct sljit_compiler *compiler, sljit_s32 dst, sljit_sw init_value, sljit_ins last_ins)
{
    if ((init_value & 0x800) != 0)
        init_value += 0x1000;
 
    FAIL_IF(push_inst(compiler, LUI | RD(dst) | (sljit_ins)(init_value & ~0xfff)));
    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_UNUSED_ARG(executable_offset);
 
    if ((new_target & 0x800) != 0)
        new_target += 0x1000;
 
    SLJIT_UPDATE_WX_FLAGS(inst, inst + 5, 0);
 
    SLJIT_ASSERT((inst[0] & 0x7f) == LUI);
    inst[0] = (inst[0] & 0xfff) | (sljit_ins)((sljit_sw)new_target & ~0xfff);
    SLJIT_ASSERT((inst[1] & 0x707f) == ADDI || (inst[1] & 0x707f) == JALR);
    inst[1] = (inst[1] & 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);
}