| 1 | /*
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| 2 | * Save/restore host registrs.
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| 3 | *
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| 4 | * Copyright (c) 2007 CodeSourcery
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| 5 | *
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| 6 | * This library is free software; you can redistribute it and/or
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| 7 | * modify it under the terms of the GNU Lesser General Public
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| 8 | * License as published by the Free Software Foundation; either
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| 9 | * version 2 of the License, or (at your option) any later version.
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| 10 | *
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| 11 | * This library is distributed in the hope that it will be useful,
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| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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| 14 | * Lesser General Public License for more details.
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| 15 | *
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| 16 | * You should have received a copy of the GNU Lesser General Public
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| 17 | * License along with this library; if not, write to the Free Software
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| 18 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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| 19 | */
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| 20 |
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| 21 | /* The GCC global register vairable extension is used to reserve some
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| 22 | host registers for use by dyngen. However only the core parts of the
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| 23 | translation engine are compiled with these settings. We must manually
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| 24 | save/restore these registers when called from regular code.
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| 25 | It is not sufficient to save/restore T0 et. al. as these may be declared
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| 26 | with a datatype smaller than the actual register. */
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| 27 |
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| 28 | #if defined(DECLARE_HOST_REGS)
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| 29 |
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| 30 | #define DO_REG(REG) \
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| 31 | register host_reg_t reg_AREG##REG asm(AREG##REG); \
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| 32 | volatile host_reg_t saved_AREG##REG;
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| 33 |
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| 34 | #elif defined(SAVE_HOST_REGS)
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| 35 |
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| 36 | #define DO_REG(REG) \
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| 37 | __asm__ __volatile__ ("" : "=r" (reg_AREG##REG)); \
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| 38 | saved_AREG##REG = reg_AREG##REG;
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| 39 |
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| 40 | #else
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| 41 |
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| 42 | #define DO_REG(REG) \
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| 43 | reg_AREG##REG = saved_AREG##REG; \
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| 44 | __asm__ __volatile__ ("" : : "r" (reg_AREG##REG));
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| 45 |
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| 46 | #endif
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| 47 |
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| 48 | #ifdef AREG0
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| 49 | DO_REG(0)
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| 50 | #endif
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| 51 |
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| 52 | #ifdef AREG1
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| 53 | DO_REG(1)
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| 54 | #endif
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| 55 |
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| 56 | #ifdef AREG2
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| 57 | DO_REG(2)
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| 58 | #endif
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| 59 |
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| 60 | #ifdef AREG3
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| 61 | DO_REG(3)
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| 62 | #endif
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| 63 |
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| 64 | #ifdef AREG4
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| 65 | DO_REG(4)
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| 66 | #endif
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| 67 |
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| 68 | #ifdef AREG5
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| 69 | DO_REG(5)
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| 70 | #endif
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| 71 |
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| 72 | #ifdef AREG6
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| 73 | DO_REG(6)
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| 74 | #endif
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| 75 |
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| 76 | #ifdef AREG7
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| 77 | DO_REG(7)
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| 78 | #endif
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| 79 |
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| 80 | #ifdef AREG8
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| 81 | DO_REG(8)
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| 82 | #endif
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| 83 |
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| 84 | #ifdef AREG9
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| 85 | DO_REG(9)
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| 86 | #endif
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| 87 |
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| 88 | #ifdef AREG10
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| 89 | DO_REG(10)
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| 90 | #endif
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| 91 |
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| 92 | #ifdef AREG11
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| 93 | DO_REG(11)
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| 94 | #endif
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| 95 |
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| 96 | #undef SAVE_HOST_REGS
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| 97 | #undef DECLARE_HOST_REGS
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| 98 | #undef DO_REG
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