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[39993d6] | 1 | /* |
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| 2 | * Copyright (c) 2013 embedded brains GmbH. All rights reserved. |
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| 3 | * |
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| 4 | * embedded brains GmbH |
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| 5 | * Dornierstr. 4 |
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| 6 | * 82178 Puchheim |
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| 7 | * Germany |
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| 8 | * <rtems@embedded-brains.de> |
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| 9 | * |
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| 10 | * The license and distribution terms for this file may be |
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| 11 | * found in the file LICENSE in this distribution or at |
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| 12 | * http://www.rtems.com/license/LICENSE. |
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| 13 | */ |
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| 14 | |
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| 15 | #ifdef HAVE_CONFIG_H |
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| 16 | #include "config.h" |
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| 17 | #endif |
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| 18 | |
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| 19 | #include <rtems/asm.h> |
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| 20 | |
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| 21 | .section .text |
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| 22 | |
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| 23 | FUNCTION_THUMB_ENTRY(_CPU_Context_volatile_clobber) |
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| 24 | |
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| 25 | .macro clobber_register reg |
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| 26 | sub r0, r0, #1 |
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| 27 | mov \reg, r0 |
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| 28 | .endm |
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| 29 | |
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[cfd8d7a] | 30 | #ifdef ARM_MULTILIB_VFP_D32 |
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| 31 | vmrs r1, FPSCR |
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| 32 | movs r2, #0x001f |
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| 33 | movt r2, #0xf800 |
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| 34 | bic r1, r1, r2 |
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| 35 | and r2, r2, r0 |
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| 36 | orr r1, r1, r2 |
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| 37 | vmsr FPSCR, r1 |
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| 38 | |
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| 39 | .macro clobber_vfp_register reg |
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| 40 | sub r0, r0, #1 |
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| 41 | vmov \reg, r0, r0 |
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| 42 | .endm |
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| 43 | |
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| 44 | clobber_vfp_register d0 |
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| 45 | clobber_vfp_register d1 |
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| 46 | clobber_vfp_register d2 |
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| 47 | clobber_vfp_register d3 |
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| 48 | clobber_vfp_register d4 |
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| 49 | clobber_vfp_register d5 |
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| 50 | clobber_vfp_register d6 |
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| 51 | clobber_vfp_register d7 |
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| 52 | clobber_vfp_register d16 |
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| 53 | clobber_vfp_register d17 |
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| 54 | clobber_vfp_register d18 |
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| 55 | clobber_vfp_register d19 |
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| 56 | clobber_vfp_register d20 |
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| 57 | clobber_vfp_register d21 |
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| 58 | clobber_vfp_register d22 |
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| 59 | clobber_vfp_register d23 |
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| 60 | clobber_vfp_register d24 |
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| 61 | clobber_vfp_register d25 |
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| 62 | clobber_vfp_register d26 |
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| 63 | clobber_vfp_register d27 |
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| 64 | clobber_vfp_register d28 |
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| 65 | clobber_vfp_register d29 |
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| 66 | clobber_vfp_register d30 |
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| 67 | clobber_vfp_register d31 |
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| 68 | #endif |
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| 69 | |
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[39993d6] | 70 | clobber_register r1 |
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| 71 | clobber_register r2 |
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| 72 | clobber_register r3 |
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| 73 | clobber_register r12 |
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| 74 | |
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| 75 | bx lr |
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| 76 | |
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| 77 | FUNCTION_END(_CPU_Context_volatile_clobber) |
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