| 1 | /* |
| 2 | * ========== Copyright Header Begin ========================================== |
| 3 | * |
| 4 | * OpenSPARC T2 Processor File: byteswap.s |
| 5 | * Copyright (c) 2006 Sun Microsystems, Inc. All Rights Reserved. |
| 6 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES. |
| 7 | * |
| 8 | * The above named program is free software; you can redistribute it and/or |
| 9 | * modify it under the terms of the GNU General Public |
| 10 | * License version 2 as published by the Free Software Foundation. |
| 11 | * |
| 12 | * The above named program is distributed in the hope that it will be |
| 13 | * useful, but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 15 | * General Public License for more details. |
| 16 | * |
| 17 | * You should have received a copy of the GNU General Public |
| 18 | * License along with this work; if not, write to the Free Software |
| 19 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA. |
| 20 | * |
| 21 | * ========== Copyright Header End ============================================ |
| 22 | */ |
| 23 | #if defined(ARCH_AMD64) |
| 24 | |
| 25 | .text |
| 26 | |
| 27 | /*============================================================================*\ |
| 28 | * uint16_t byteswap16( uint16_t v ) |
| 29 | \*============================================================================*/ |
| 30 | .align 16 |
| 31 | .globl byteswap16 |
| 32 | .type byteswap16, @function |
| 33 | byteswap16: |
| 34 | movw %di,%ax |
| 35 | xchgb %ah,%al |
| 36 | ret |
| 37 | .size byteswap16, [.-byteswap16] |
| 38 | |
| 39 | /*============================================================================*\ |
| 40 | * uint32_t byteswap32( uint32_t v ) |
| 41 | \*============================================================================*/ |
| 42 | .align 16 |
| 43 | .globl byteswap32 |
| 44 | |
| 45 | .type byteswap32, @function |
| 46 | byteswap32: |
| 47 | movl %edi,%eax |
| 48 | bswapl %eax |
| 49 | ret |
| 50 | .size byteswap32, [.-byteswap32] |
| 51 | |
| 52 | /*============================================================================*\ |
| 53 | * uint64_t byteswap64( uint64_t v ) |
| 54 | \*============================================================================*/ |
| 55 | .align 16 |
| 56 | .globl byteswap64 |
| 57 | .type byteswap64, @function |
| 58 | byteswap64: |
| 59 | movq %rdi,%rax |
| 60 | bswapq %rax |
| 61 | ret |
| 62 | .size byteswap64, [.-byteswap64] |
| 63 | |
| 64 | #endif |