1 /* 2 * Copyright (C) 2014 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #ifndef ART_RUNTIME_ARCH_MIPS64_ASM_SUPPORT_MIPS64_S_ 18 #define ART_RUNTIME_ARCH_MIPS64_ASM_SUPPORT_MIPS64_S_ 19 20 #include "asm_support_mips64.h" 21 22 // Define special registers. 23 24 // Register holding suspend check count down. 25 #define rSUSPEND $s0 26 // Register holding Thread::Current(). 27 #define rSELF $s1 28 29 30 // Declare a function called name, doesn't set up $gp. 31 .macro ENTRY_NO_GP_CUSTOM_CFA name, cfa_offset 32 .type \name, %function 33 .global \name 34 // Cache alignment for function entry. 35 .balign 16 36 \name: 37 .cfi_startproc 38 // Ensure we get a sane starting CFA. 39 .cfi_def_cfa $sp, \cfa_offset 40 .endm 41 42 // Declare a function called name, doesn't set up $gp. 43 .macro ENTRY_NO_GP name 44 ENTRY_NO_GP_CUSTOM_CFA \name, 0 45 .endm 46 47 // Declare a function called name, sets up $gp. 48 // This macro modifies t8. 49 .macro ENTRY name 50 ENTRY_NO_GP \name 51 // Set up $gp and store the previous $gp value to $t8. It will be pushed to the 52 // stack after the frame has been constructed. 53 .cpsetup $t9, $t8, \name 54 // Declare a local convenience label to be branched to when $gp is already set up. 55 .L\name\()_gp_set: 56 .endm 57 58 .macro END name 59 .cfi_endproc 60 .size \name, .-\name 61 .endm 62 63 .macro UNIMPLEMENTED name 64 ENTRY \name 65 break 66 break 67 END \name 68 .endm 69 70 // Macros to poison (negate) the reference for heap poisoning. 71 .macro POISON_HEAP_REF rRef 72 #ifdef USE_HEAP_POISONING 73 dsubu \rRef, $zero, \rRef 74 dext \rRef, \rRef, 0, 32 75 #endif // USE_HEAP_POISONING 76 .endm 77 78 // Macros to unpoison (negate) the reference for heap poisoning. 79 .macro UNPOISON_HEAP_REF rRef 80 #ifdef USE_HEAP_POISONING 81 dsubu \rRef, $zero, \rRef 82 dext \rRef, \rRef, 0, 32 83 #endif // USE_HEAP_POISONING 84 .endm 85 86 // Byte size of the instructions (un)poisoning heap references. 87 #ifdef USE_HEAP_POISONING 88 #define HEAP_POISON_INSTR_SIZE 8 89 #else 90 #define HEAP_POISON_INSTR_SIZE 0 91 #endif // USE_HEAP_POISONING 92 93 // Based on contents of creg select the minimum integer 94 // At the end of the macro the original value of creg is lost 95 .macro MINint dreg,rreg,sreg,creg 96 .set push 97 .set noat 98 .ifc \dreg, \rreg 99 selnez \dreg, \rreg, \creg 100 seleqz \creg, \sreg, \creg 101 .else 102 seleqz \dreg, \sreg, \creg 103 selnez \creg, \rreg, \creg 104 .endif 105 or \dreg, \dreg, \creg 106 .set pop 107 .endm 108 109 // Find minimum of two signed registers 110 .macro MINs dreg,rreg,sreg 111 .set push 112 .set noat 113 slt $at, \rreg, \sreg 114 MINint \dreg, \rreg, \sreg, $at 115 .set pop 116 .endm 117 118 // Find minimum of two unsigned registers 119 .macro MINu dreg,rreg,sreg 120 .set push 121 .set noat 122 sltu $at, \rreg, \sreg 123 MINint \dreg, \rreg, \sreg, $at 124 .set pop 125 .endm 126 127 #endif // ART_RUNTIME_ARCH_MIPS64_ASM_SUPPORT_MIPS64_S_ 128
