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Diffstat (limited to 'modules/mp_ia32/mp_asmi.h')
| -rw-r--r-- | modules/mp_ia32/mp_asmi.h | 174 |
1 files changed, 174 insertions, 0 deletions
diff --git a/modules/mp_ia32/mp_asmi.h b/modules/mp_ia32/mp_asmi.h new file mode 100644 index 000000000..a0e5a82e4 --- /dev/null +++ b/modules/mp_ia32/mp_asmi.h @@ -0,0 +1,174 @@ +/************************************************* +* Lowest Level MPI Algorithms Header File * +* (C) 1999-2006 The Botan Project * +*************************************************/ + +#ifndef BOTAN_MP_ASM_INTERNAL_H__ +#define BOTAN_MP_ASM_INTERNAL_H__ + +#include <botan/mp_types.h> + +namespace Botan { + +/************************************************* +* Helper Macros for x86 Assembly * +*************************************************/ +#define ASM(x) x "\n\t" + +#define ADDSUB2_OP(OPERATION, INDEX) \ + ASM("movl 4*" INDEX "(%[y]), %[carry]") \ + ASM(OPERATION " %[carry], 4*" INDEX "(%[x])") \ + +#define ADDSUB3_OP(OPERATION, INDEX) \ + ASM("movl 4*" INDEX "(%[x]), %[carry]") \ + ASM(OPERATION " 4*" INDEX "(%[y]), %[carry]") \ + ASM("movl %[carry], 4*" INDEX "(%[z])") \ + +#define LINMUL_OP(WRITE_TO, INDEX) \ + ASM("movl 4*" INDEX "(%[x]),%%eax") \ + ASM("mull %[y]") \ + ASM("addl %[carry],%%eax") \ + ASM("adcl $0,%%edx") \ + ASM("movl %%edx,%[carry]") \ + ASM("movl %%eax, 4*" INDEX "(%[" WRITE_TO "])") + +#define MULADD_OP(IGNORED, INDEX) \ + ASM("movl 4*" INDEX "(%[x]),%%eax") \ + ASM("mull %[y]") \ + ASM("addl %[carry],%%eax") \ + ASM("adcl $0,%%edx") \ + ASM("addl 4*" INDEX "(%[z]),%%eax") \ + ASM("adcl $0,%%edx") \ + ASM("movl %%edx,%[carry]") \ + ASM("movl %%eax, 4*" INDEX " (%[z])") + +#define DO_8_TIMES(MACRO, ARG) \ + MACRO(ARG, "0") MACRO(ARG, "1") MACRO(ARG, "2") MACRO(ARG, "3") \ + MACRO(ARG, "4") MACRO(ARG, "5") MACRO(ARG, "6") MACRO(ARG, "7") + +#define ADD_OR_SUBTRACT(CORE_CODE) \ + ASM("rorl %[carry]") \ + CORE_CODE \ + ASM("sbbl %[carry],%[carry]") \ + ASM("negl %[carry]") + +/************************************************* +* Word Addition * +*************************************************/ +inline word word_add(word x, word y, word* carry) + { + asm( + ADD_OR_SUBTRACT(ASM("adcl %[y],%[x]")) + : [x]"=r"(x), [carry]"=r"(*carry) + : "0"(x), [y]"rm"(y), "1"(*carry) + : "cc"); + return x; + } + +/************************************************* +* Eight Word Block Addition, Two Argument * +*************************************************/ +inline word word8_add2(word x[8], const word y[8], word carry) + { + asm( + ADD_OR_SUBTRACT(DO_8_TIMES(ADDSUB2_OP, "adcl")) + : [carry]"=r"(carry) + : [x]"r"(x), [y]"r"(y), "0"(carry) + : "cc", "memory"); + return carry; + } + +/************************************************* +* Eight Word Block Addition, Three Argument * +*************************************************/ +inline word word8_add3(word z[8], const word x[8], const word y[8], word carry) + { + asm( + ADD_OR_SUBTRACT(DO_8_TIMES(ADDSUB3_OP, "adcl")) + : [carry]"=r"(carry) + : [x]"r"(x), [y]"r"(y), [z]"r"(z), "0"(carry) + : "cc", "memory"); + return carry; + } + +/************************************************* +* Word Subtraction * +*************************************************/ +inline word word_sub(word x, word y, word* carry) + { + asm( + ADD_OR_SUBTRACT(ASM("sbbl %[y],%[x]")) + : [x]"=r"(x), [carry]"=r"(*carry) + : "0"(x), [y]"rm"(y), "1"(*carry) + : "cc"); + return x; + } + +/************************************************* +* Eight Word Block Subtraction, Two Argument * +*************************************************/ +inline word word8_sub2(word x[8], const word y[8], word carry) + { + asm( + ADD_OR_SUBTRACT(DO_8_TIMES(ADDSUB2_OP, "sbbl")) + : [carry]"=r"(carry) + : [x]"r"(x), [y]"r"(y), "0"(carry) + : "cc", "memory"); + return carry; + } + +/************************************************* +* Eight Word Block Subtraction, Three Argument * +*************************************************/ +inline word word8_sub3(word z[8], const word x[8], const word y[8], word carry) + { + asm( + ADD_OR_SUBTRACT(DO_8_TIMES(ADDSUB3_OP, "sbbl")) + : [carry]"=r"(carry) + : [x]"r"(x), [y]"r"(y), [z]"r"(z), "0"(carry) + : "cc", "memory"); + return carry; + } + +/************************************************* +* Eight Word Block Linear Multiplication * +*************************************************/ +inline word word8_linmul2(word x[8], word y, word carry) + { + asm( + DO_8_TIMES(LINMUL_OP, "x") + : [carry]"=r"(carry) + : [x]"r"(x), [y]"rm"(y), "0"(carry) + : "cc", "%eax", "%edx"); + return carry; + } + +/************************************************* +* Eight Word Block Linear Multiplication * +*************************************************/ +inline word word8_linmul3(word z[8], const word x[8], word y, word carry) + { + asm( + DO_8_TIMES(LINMUL_OP, "z") + : [carry]"=r"(carry) + : [z]"r"(z), [x]"r"(x), [y]"rm"(y), "0"(carry) + : "cc", "%eax", "%edx"); + return carry; + } + +/************************************************* +* Eight Word Block Multiply/Add * +*************************************************/ +inline word word8_madd3(word z[8], const word x[8], word y, word carry) + { + asm( + DO_8_TIMES(MULADD_OP, "") + : [carry]"=r"(carry) + : [z]"r"(z), [x]"r"(x), [y]"rm"(y), "0"(carry) + : "cc", "%eax", "%edx"); + return carry; + } + +} + +#endif |