initial commit, 4.5 stable

thirdparty/pcre2/deps/sljit/sljit_src/sljitNativeRISCV_64.c

@@ -0,0 +1,222 @@
+/*
+ *    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;
+	}
+
+	SLJIT_ASSERT(dst_r != tmp_r);
+
+	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));
+}
+
+SLJIT_API_FUNC_ATTRIBUTE sljit_s32 sljit_emit_fset64(struct sljit_compiler *compiler,
+	sljit_s32 freg, sljit_f64 value)
+{
+	union {
+		sljit_sw imm;
+		sljit_f64 value;
+	} u;
+
+	CHECK_ERROR();
+	CHECK(check_sljit_emit_fset64(compiler, freg, value));
+
+	u.value = value;
+
+	if (u.imm == 0)
+		return push_inst(compiler, FMV_W_X | (1 << 25) | RS1(TMP_ZERO) | FRD(freg));
+
+	FAIL_IF(load_immediate(compiler, TMP_REG1, u.imm, TMP_REG3));
+	return push_inst(compiler, FMV_W_X | (1 << 25) | RS1(TMP_REG1) | FRD(freg));
+}
+
+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;
+
+	CHECK_ERROR();
+	CHECK(check_sljit_emit_fcopy(compiler, op, freg, reg));
+
+	if (GET_OPCODE(op) == SLJIT_COPY_TO_F64)
+		inst = FMV_W_X | RS1(reg) | FRD(freg);
+	else
+		inst = FMV_X_W | FRS1(freg) | RD(reg);
+
+	if (!(op & SLJIT_32))
+		inst |= (sljit_ins)1 << 25;
+
+	return push_inst(compiler, inst);
+}
+
+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);
+}