diff options
Diffstat (limited to 'qemu/roms/ipxe/src/arch/x86/include/bits/bigint.h')
| -rw-r--r-- | qemu/roms/ipxe/src/arch/x86/include/bits/bigint.h | 318 |
1 files changed, 0 insertions, 318 deletions
diff --git a/qemu/roms/ipxe/src/arch/x86/include/bits/bigint.h b/qemu/roms/ipxe/src/arch/x86/include/bits/bigint.h deleted file mode 100644 index c9bb6ea45..000000000 --- a/qemu/roms/ipxe/src/arch/x86/include/bits/bigint.h +++ /dev/null @@ -1,318 +0,0 @@ -#ifndef _BITS_BIGINT_H -#define _BITS_BIGINT_H - -/** @file - * - * Big integer support - */ - -FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL ); - -#include <stdint.h> -#include <string.h> - -/** Element of a big integer */ -typedef uint32_t bigint_element_t; - -/** - * Initialise big integer - * - * @v value0 Element 0 of big integer to initialise - * @v size Number of elements - * @v data Raw data - * @v len Length of raw data - */ -static inline __attribute__ (( always_inline )) void -bigint_init_raw ( uint32_t *value0, unsigned int size, - const void *data, size_t len ) { - long pad_len = ( sizeof ( bigint_t ( size ) ) - len ); - void *discard_D; - long discard_c; - - /* Copy raw data in reverse order, padding with zeros */ - __asm__ __volatile__ ( "\n1:\n\t" - "movb -1(%2,%1), %%al\n\t" - "stosb\n\t" - "loop 1b\n\t" - "xorl %%eax, %%eax\n\t" - "mov %3, %1\n\t" - "rep stosb\n\t" - : "=&D" ( discard_D ), "=&c" ( discard_c ) - : "r" ( data ), "g" ( pad_len ), "0" ( value0 ), - "1" ( len ) - : "eax" ); -} - -/** - * Add big integers - * - * @v addend0 Element 0 of big integer to add - * @v value0 Element 0 of big integer to be added to - * @v size Number of elements - */ -static inline __attribute__ (( always_inline )) void -bigint_add_raw ( const uint32_t *addend0, uint32_t *value0, - unsigned int size ) { - long index; - void *discard_S; - long discard_c; - - __asm__ __volatile__ ( "xor %0, %0\n\t" /* Zero %0 and clear CF */ - "\n1:\n\t" - "lodsl\n\t" - "adcl %%eax, (%3,%0,4)\n\t" - "inc %0\n\t" /* Does not affect CF */ - "loop 1b\n\t" - : "=&r" ( index ), "=&S" ( discard_S ), - "=&c" ( discard_c ) - : "r" ( value0 ), "1" ( addend0 ), "2" ( size ) - : "eax" ); -} - -/** - * Subtract big integers - * - * @v subtrahend0 Element 0 of big integer to subtract - * @v value0 Element 0 of big integer to be subtracted from - * @v size Number of elements - */ -static inline __attribute__ (( always_inline )) void -bigint_subtract_raw ( const uint32_t *subtrahend0, uint32_t *value0, - unsigned int size ) { - long index; - void *discard_S; - long discard_c; - - __asm__ __volatile__ ( "xor %0, %0\n\t" /* Zero %0 and clear CF */ - "\n1:\n\t" - "lodsl\n\t" - "sbbl %%eax, (%3,%0,4)\n\t" - "inc %0\n\t" /* Does not affect CF */ - "loop 1b\n\t" - : "=&r" ( index ), "=&S" ( discard_S ), - "=&c" ( discard_c ) - : "r" ( value0 ), "1" ( subtrahend0 ), - "2" ( size ) - : "eax" ); -} - -/** - * Rotate big integer left - * - * @v value0 Element 0 of big integer - * @v size Number of elements - */ -static inline __attribute__ (( always_inline )) void -bigint_rol_raw ( uint32_t *value0, unsigned int size ) { - long index; - long discard_c; - - __asm__ __volatile__ ( "xor %0, %0\n\t" /* Zero %0 and clear CF */ - "\n1:\n\t" - "rcll $1, (%2,%0,4)\n\t" - "inc %0\n\t" /* Does not affect CF */ - "loop 1b\n\t" - : "=&r" ( index ), "=&c" ( discard_c ) - : "r" ( value0 ), "1" ( size ) ); -} - -/** - * Rotate big integer right - * - * @v value0 Element 0 of big integer - * @v size Number of elements - */ -static inline __attribute__ (( always_inline )) void -bigint_ror_raw ( uint32_t *value0, unsigned int size ) { - long discard_c; - - __asm__ __volatile__ ( "clc\n\t" - "\n1:\n\t" - "rcrl $1, -4(%1,%0,4)\n\t" - "loop 1b\n\t" - : "=&c" ( discard_c ) - : "r" ( value0 ), "0" ( size ) ); -} - -/** - * Test if big integer is equal to zero - * - * @v value0 Element 0 of big integer - * @v size Number of elements - * @ret is_zero Big integer is equal to zero - */ -static inline __attribute__ (( always_inline, pure )) int -bigint_is_zero_raw ( const uint32_t *value0, unsigned int size ) { - void *discard_D; - long discard_c; - int result; - - __asm__ __volatile__ ( "xor %0, %0\n\t" /* Set ZF */ - "repe scasl\n\t" - "sete %b0\n\t" - : "=&a" ( result ), "=&D" ( discard_D ), - "=&c" ( discard_c ) - : "1" ( value0 ), "2" ( size ) ); - return result; -} - -/** - * Compare big integers - * - * @v value0 Element 0 of big integer - * @v reference0 Element 0 of reference big integer - * @v size Number of elements - * @ret geq Big integer is greater than or equal to the reference - */ -static inline __attribute__ (( always_inline, pure )) int -bigint_is_geq_raw ( const uint32_t *value0, const uint32_t *reference0, - unsigned int size ) { - const bigint_t ( size ) __attribute__ (( may_alias )) *value = - ( ( const void * ) value0 ); - const bigint_t ( size ) __attribute__ (( may_alias )) *reference = - ( ( const void * ) reference0 ); - void *discard_S; - void *discard_D; - long discard_c; - int result; - - __asm__ __volatile__ ( "std\n\t" - "\n1:\n\t" - "lodsl\n\t" - "scasl\n\t" - "loope 1b\n\t" - "setae %b0\n\t" - "cld\n\t" - : "=q" ( result ), "=&S" ( discard_S ), - "=&D" ( discard_D ), "=&c" ( discard_c ) - : "0" ( 0 ), "1" ( &value->element[ size - 1 ] ), - "2" ( &reference->element[ size - 1 ] ), - "3" ( size ) - : "eax" ); - return result; -} - -/** - * Test if bit is set in big integer - * - * @v value0 Element 0 of big integer - * @v size Number of elements - * @v bit Bit to test - * @ret is_set Bit is set - */ -static inline __attribute__ (( always_inline )) int -bigint_bit_is_set_raw ( const uint32_t *value0, unsigned int size, - unsigned int bit ) { - const bigint_t ( size ) __attribute__ (( may_alias )) *value = - ( ( const void * ) value0 ); - unsigned int index = ( bit / ( 8 * sizeof ( value->element[0] ) ) ); - unsigned int subindex = ( bit % ( 8 * sizeof ( value->element[0] ) ) ); - - return ( value->element[index] & ( 1 << subindex ) ); -} - -/** - * Find highest bit set in big integer - * - * @v value0 Element 0 of big integer - * @v size Number of elements - * @ret max_bit Highest bit set + 1 (or 0 if no bits set) - */ -static inline __attribute__ (( always_inline )) int -bigint_max_set_bit_raw ( const uint32_t *value0, unsigned int size ) { - long discard_c; - int result; - - __asm__ __volatile__ ( "\n1:\n\t" - "bsrl -4(%2,%1,4), %0\n\t" - "loopz 1b\n\t" - "rol %1\n\t" /* Does not affect ZF */ - "rol %1\n\t" - "leal 1(%k0,%k1,8), %k0\n\t" - "jnz 2f\n\t" - "xor %0, %0\n\t" - "\n2:\n\t" - : "=&r" ( result ), "=&c" ( discard_c ) - : "r" ( value0 ), "1" ( size ) ); - return result; -} - -/** - * Grow big integer - * - * @v source0 Element 0 of source big integer - * @v source_size Number of elements in source big integer - * @v dest0 Element 0 of destination big integer - * @v dest_size Number of elements in destination big integer - */ -static inline __attribute__ (( always_inline )) void -bigint_grow_raw ( const uint32_t *source0, unsigned int source_size, - uint32_t *dest0, unsigned int dest_size ) { - long pad_size = ( dest_size - source_size ); - void *discard_D; - void *discard_S; - long discard_c; - - __asm__ __volatile__ ( "rep movsl\n\t" - "xorl %%eax, %%eax\n\t" - "mov %3, %2\n\t" - "rep stosl\n\t" - : "=&D" ( discard_D ), "=&S" ( discard_S ), - "=&c" ( discard_c ) - : "g" ( pad_size ), "0" ( dest0 ), - "1" ( source0 ), "2" ( source_size ) - : "eax" ); -} - -/** - * Shrink big integer - * - * @v source0 Element 0 of source big integer - * @v source_size Number of elements in source big integer - * @v dest0 Element 0 of destination big integer - * @v dest_size Number of elements in destination big integer - */ -static inline __attribute__ (( always_inline )) void -bigint_shrink_raw ( const uint32_t *source0, unsigned int source_size __unused, - uint32_t *dest0, unsigned int dest_size ) { - void *discard_D; - void *discard_S; - long discard_c; - - __asm__ __volatile__ ( "rep movsl\n\t" - : "=&D" ( discard_D ), "=&S" ( discard_S ), - "=&c" ( discard_c ) - : "0" ( dest0 ), "1" ( source0 ), - "2" ( dest_size ) - : "eax" ); -} - -/** - * Finalise big integer - * - * @v value0 Element 0 of big integer to finalise - * @v size Number of elements - * @v out Output buffer - * @v len Length of output buffer - */ -static inline __attribute__ (( always_inline )) void -bigint_done_raw ( const uint32_t *value0, unsigned int size __unused, - void *out, size_t len ) { - void *discard_D; - long discard_c; - - /* Copy raw data in reverse order */ - __asm__ __volatile__ ( "\n1:\n\t" - "movb -1(%2,%1), %%al\n\t" - "stosb\n\t" - "loop 1b\n\t" - : "=&D" ( discard_D ), "=&c" ( discard_c ) - : "r" ( value0 ), "0" ( out ), "1" ( len ) - : "eax" ); -} - -extern void bigint_multiply_raw ( const uint32_t *multiplicand0, - const uint32_t *multiplier0, - uint32_t *value0, unsigned int size ); - -#endif /* _BITS_BIGINT_H */ |