1214152Sed//===------- bswapdi2 - Implement bswapdi2 --------------------------------===// 2214152Sed// 3214152Sed// The LLVM Compiler Infrastructure 4214152Sed// 5222656Sed// This file is dual licensed under the MIT and the University of Illinois Open 6222656Sed// Source Licenses. See LICENSE.TXT for details. 7214152Sed// 8214152Sed//===----------------------------------------------------------------------===// 9214152Sed 10214152Sed#include "../assembly.h" 11214152Sed 12214152Sed// 13214152Sed// extern uint64_t __bswapdi2(uint64_t); 14214152Sed// 15214152Sed// Reverse all the bytes in a 64-bit integer. 16214152Sed// 17214152Sed.align 2 18214152SedDEFINE_COMPILERRT_FUNCTION(__bswapdi2) 19214152Sed#if __ARM_ARCH_5TEJ__ || __ARM_ARCH_4T__ 20214152Sed // before armv6 does not have "rev" instruction 21214152Sed // r2 = rev(r0) 22214152Sed eor r2, r0, r0, ror #16 23214152Sed bic r2, r2, #0xff0000 24214152Sed mov r2, r2, lsr #8 25214152Sed eor r2, r2, r0, ror #8 26214152Sed // r0 = rev(r1) 27214152Sed eor r0, r1, r1, ror #16 28214152Sed bic r0, r0, #0xff0000 29214152Sed mov r0, r0, lsr #8 30214152Sed eor r0, r0, r1, ror #8 31214152Sed#else 32214152Sed rev r2, r0 // r2 = rev(r0) 33214152Sed rev r0, r1 // r0 = rev(r1) 34214152Sed#endif 35214152Sed mov r1, r2 // r1 = r2 = rev(r0) 36214152Sed bx lr 37