Botan 1.10.17
asm_x86_32.h
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1/*
2* Assembly Macros for 32-bit x86
3* (C) 1999-2008 Jack Lloyd
4*
5* Distributed under the terms of the Botan license
6*/
7
8#ifndef BOTAN_ASM_MACROS_X86_32_H__
9#define BOTAN_ASM_MACROS_X86_32_H__
10
11/*
12* General/Global Macros
13*/
14#define ALIGN .p2align 4,,15
15
16#define START_LISTING(FILENAME) \
17 .file #FILENAME; \
18 .text; \
19 ALIGN;
20
21#if defined(__ELF__)
22.section .note.GNU-stack,"",%progbits
23#endif
24
25/*
26* Function Definitions
27*/
28#define START_FUNCTION(func_name) \
29 ALIGN; \
30 .global func_name; \
31 .type func_name,@function; \
32func_name:
33
34#define END_FUNCTION(func_name) \
35 ret
36
37/*
38* Loop Control
39*/
40#define START_LOOP(LABEL) \
41 ALIGN; \
42 LABEL##_LOOP:
43
44#define LOOP_UNTIL_EQ(REG, NUM, LABEL) \
45 cmpl IMM(NUM), REG; \
46 jne LABEL##_LOOP
47
48#define LOOP_UNTIL_LT(REG, NUM, LABEL) \
49 cmpl IMM(NUM), REG; \
50 jge LABEL##_LOOP
51
52/*
53 Conditional Jumps
54*/
55#define JUMP_IF_ZERO(REG, LABEL) \
56 cmpl IMM(0), REG; \
57 jz LABEL
58
59#define JUMP_IF_LT(REG, NUM, LABEL) \
60 cmpl IMM(NUM), REG; \
61 jl LABEL
62
63/*
64* Register Names
65*/
66#define EAX %eax
67#define EBX %ebx
68#define ECX %ecx
69#define EDX %edx
70#define EBP %ebp
71#define EDI %edi
72#define ESI %esi
73#define ESP %esp
74
75/*
76* Memory Access Operations
77*/
78#define ARRAY1(REG, NUM) (NUM)(REG)
79#define ARRAY4(REG, NUM) 4*(NUM)(REG)
80#define ARRAY4_INDIRECT(BASE, OFFSET, NUM) 4*(NUM)(BASE,OFFSET,4)
81#define ARG(NUM) 4*(PUSHED) + ARRAY4(ESP, NUM)
82
83#define ASSIGN(TO, FROM) movl FROM, TO
84#define ASSIGN_BYTE(TO, FROM) movzbl FROM, TO
85
86#define PUSH(REG) pushl REG
87#define POP(REG) popl REG
88
89#define SPILL_REGS() \
90 PUSH(EBP) ; \
91 PUSH(EDI) ; \
92 PUSH(ESI) ; \
93 PUSH(EBX)
94
95#define RESTORE_REGS() \
96 POP(EBX) ; \
97 POP(ESI) ; \
98 POP(EDI) ; \
99 POP(EBP)
100
101/*
102* ALU Operations
103*/
104#define IMM(VAL) $VAL
105
106#define ADD(TO, FROM) addl FROM, TO
107#define ADD_IMM(TO, NUM) ADD(TO, IMM(NUM))
108#define ADD_W_CARRY(TO1, TO2, FROM) addl FROM, TO1; adcl IMM(0), TO2;
109#define SUB_IMM(TO, NUM) subl IMM(NUM), TO
110#define ADD2_IMM(TO, FROM, NUM) leal NUM(FROM), TO
111#define ADD3_IMM(TO, FROM, NUM) leal NUM(TO,FROM,1), TO
112#define MUL(REG) mull REG
113
114#define SHL_IMM(REG, SHIFT) shll IMM(SHIFT), REG
115#define SHR_IMM(REG, SHIFT) shrl IMM(SHIFT), REG
116#define SHL2_3(TO, FROM) leal 0(,FROM,8), TO
117
118#define XOR(TO, FROM) xorl FROM, TO
119#define AND(TO, FROM) andl FROM, TO
120#define OR(TO, FROM) orl FROM, TO
121#define NOT(REG) notl REG
122#define ZEROIZE(REG) XOR(REG, REG)
123
124#define ROTL_IMM(REG, NUM) roll IMM(NUM), REG
125#define ROTR_IMM(REG, NUM) rorl IMM(NUM), REG
126#define BSWAP(REG) bswapl REG
127
128#endif
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