1 /* Copyright (c) 2006 Tensilica Inc. 2 3 Permission is hereby granted, free of charge, to any person obtaining 4 a copy of this software and associated documentation files (the 5 "Software"), to deal in the Software without restriction, including 6 without limitation the rights to use, copy, modify, merge, publish, 7 distribute, sublicense, and/or sell copies of the Software, and to 8 permit persons to whom the Software is furnished to do so, subject to 9 the following conditions: 10 11 The above copyright notice and this permission notice shall be included 12 in all copies or substantial portions of the Software. 13 14 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 15 EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 16 MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. 17 IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY 18 CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, 19 TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE 20 SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */ 21 22 /* Define macros for leaf function entry and return, supporting either the 23 * standard register windowed ABI or the non-windowed call0 ABI. These 24 * macros do not allocate any extra stack space, so they only work for 25 * leaf functions that do not need to spill anything to the stack. */ 26 27 #include <machine/core-isa.h> 28 29 .macro leaf_entry reg, size 30 #if XCHAL_HAVE_WINDOWED && !__XTENSA_CALL0_ABI__ 31 entry \reg, \size 32 #else 33 /* do nothing */ 34 #endif 35 .endm 36 37 .macro leaf_return 38 #if XCHAL_HAVE_WINDOWED && !__XTENSA_CALL0_ABI__ 39 retw 40 #else 41 ret 42 #endif 43 .endm 44 45 .macro src_b r, w0, w1 46 #ifdef __XTENSA_EB__ 47 src \r, \w0, \w1 48 #else 49 src \r, \w1, \w0 50 #endif 51 .endm 52 53 .macro ssa8 r 54 #ifdef __XTENSA_EB__ 55 ssa8b \r 56 #else 57 ssa8l \r 58 #endif 59 .endm 60 61 #if XCHAL_HAVE_BE 62 #define MASK0 0xff000000 63 #define MASK1 0x00ff0000 64 #define MASK2 0x0000ff00 65 #define MASK3 0x000000ff 66 #else 67 #define MASK0 0x000000ff 68 #define MASK1 0x0000ff00 69 #define MASK2 0x00ff0000 70 #define MASK3 0xff000000 71 #endif 72 73
