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src
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asm_x86_32
asm_x86_32.h
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/*
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* Assembly Macros for 32-bit x86
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* (C) 1999-2008 Jack Lloyd
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*
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* Distributed under the terms of the Botan license
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*/
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#ifndef BOTAN_ASM_MACROS_X86_32_H__
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#define BOTAN_ASM_MACROS_X86_32_H__
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/*
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* General/Global Macros
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*/
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#define ALIGN .p2align 4,,15
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#define START_LISTING(FILENAME) \
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.file #FILENAME; \
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.text; \
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ALIGN;
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#if defined(__ELF__)
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.section .note.GNU-stack,
""
,%progbits
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#endif
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/*
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* Function Definitions
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*/
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#define START_FUNCTION(func_name) \
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ALIGN; \
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.global func_name; \
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.type func_name,@function; \
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func_name:
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#define END_FUNCTION(func_name) \
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ret
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/*
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* Loop Control
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*/
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#define START_LOOP(LABEL) \
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ALIGN; \
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LABEL##_LOOP:
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#define LOOP_UNTIL_EQ(REG, NUM, LABEL) \
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cmpl IMM(NUM), REG; \
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jne LABEL##_LOOP
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#define LOOP_UNTIL_LT(REG, NUM, LABEL) \
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cmpl IMM(NUM), REG; \
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jge LABEL##_LOOP
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/*
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Conditional Jumps
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*/
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#define JUMP_IF_ZERO(REG, LABEL) \
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cmpl IMM(0), REG; \
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jz LABEL
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#define JUMP_IF_LT(REG, NUM, LABEL) \
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cmpl IMM(NUM), REG; \
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jl LABEL
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/*
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* Register Names
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*/
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#define EAX %eax
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#define EBX %ebx
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#define ECX %ecx
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#define EDX %edx
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#define EBP %ebp
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#define EDI %edi
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#define ESI %esi
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#define ESP %esp
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/*
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* Memory Access Operations
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*/
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#define ARRAY1(REG, NUM) (NUM)(REG)
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#define ARRAY4(REG, NUM) 4*(NUM)(REG)
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#define ARRAY4_INDIRECT(BASE, OFFSET, NUM) 4*(NUM)(BASE,OFFSET,4)
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#define ARG(NUM) 4*(PUSHED) + ARRAY4(ESP, NUM)
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#define ASSIGN(TO, FROM) movl FROM, TO
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#define ASSIGN_BYTE(TO, FROM) movzbl FROM, TO
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#define PUSH(REG) pushl REG
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#define POP(REG) popl REG
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#define SPILL_REGS() \
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PUSH(EBP) ; \
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PUSH(EDI) ; \
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PUSH(ESI) ; \
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PUSH(EBX)
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#define RESTORE_REGS() \
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POP(EBX) ; \
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POP(ESI) ; \
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POP(EDI) ; \
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POP(EBP)
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/*
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* ALU Operations
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*/
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#define IMM(VAL) $VAL
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#define ADD(TO, FROM) addl FROM, TO
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#define ADD_IMM(TO, NUM) ADD(TO, IMM(NUM))
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#define ADD_W_CARRY(TO1, TO2, FROM) addl FROM, TO1; adcl IMM(0), TO2;
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#define SUB_IMM(TO, NUM) subl IMM(NUM), TO
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#define ADD2_IMM(TO, FROM, NUM) leal NUM(FROM), TO
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#define ADD3_IMM(TO, FROM, NUM) leal NUM(TO,FROM,1), TO
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#define MUL(REG) mull REG
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#define SHL_IMM(REG, SHIFT) shll IMM(SHIFT), REG
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#define SHR_IMM(REG, SHIFT) shrl IMM(SHIFT), REG
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#define SHL2_3(TO, FROM) leal 0(,FROM,8), TO
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#define XOR(TO, FROM) xorl FROM, TO
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#define AND(TO, FROM) andl FROM, TO
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#define OR(TO, FROM) orl FROM, TO
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#define NOT(REG) notl REG
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#define ZEROIZE(REG) XOR(REG, REG)
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#define ROTL_IMM(REG, NUM) roll IMM(NUM), REG
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#define ROTR_IMM(REG, NUM) rorl IMM(NUM), REG
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#define BSWAP(REG) bswapl REG
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#endif
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