| /* |
| * Copyright (C) 2023 The Android Open Source Project |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * * Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * * 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 HOLDERS 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 OWNER 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. |
| */ |
| /* |
| * Copyright (c) 2023 SiFive, Inc. |
| * 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. |
| * 3. The name of the company may not be used to endorse or promote |
| * products derived from this software without specific prior written |
| * permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY SIFIVE INC ``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 SIFIVE INC 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. |
| */ |
| |
| #if defined(__riscv_v) |
| |
| #include "sys/asm.h" |
| |
| #define iResult a0 |
| |
| #define pSrc1 a0 |
| #define pSrc2 a1 |
| #define iNum a2 |
| |
| #define iVL a3 |
| #define iTemp a4 |
| #define iTemp1 a5 |
| #define iTemp2 a6 |
| |
| #define ELEM_LMUL_SETTING m8 |
| #define vData1 v0 |
| #define vData2 v8 |
| #define vMask v16 |
| |
| ENTRY(memcmp_vext) |
| |
| L(loop): |
| vsetvli iVL, iNum, e8, ELEM_LMUL_SETTING, ta, ma |
| |
| vle8.v vData1, (pSrc1) |
| vle8.v vData2, (pSrc2) |
| |
| vmsne.vv vMask, vData1, vData2 |
| sub iNum, iNum, iVL |
| vfirst.m iTemp, vMask |
| |
| /* skip the loop if we find the different |
| value between pSrc1 and pSrc2. */ |
| bgez iTemp, L(found) |
| |
| add pSrc1, pSrc1, iVL |
| add pSrc2, pSrc2, iVL |
| |
| bnez iNum, L(loop) |
| |
| li iResult, 0 |
| ret |
| |
| L(found): |
| add pSrc1, pSrc1, iTemp |
| add pSrc2, pSrc2, iTemp |
| lbu iTemp1, 0(pSrc1) |
| lbu iTemp2, 0(pSrc2) |
| sub iResult, iTemp1, iTemp2 |
| ret |
| |
| END(memcmp_vext) |
| |
| #endif |
