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bitbmob.c
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bitbmob.c
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/*
File: bitbmob.c
Modified: November 18, 2005
Authors: Gunnar Andersson (gunnar@radagast.se)
Toshihiko Okuhara
Contents: Count feasible moves in the bitboard.
This piece of software is released under the GPL.
See the file COPYING for more information.
*/
#include <assert.h>
#include <stdio.h>
#include <stdlib.h>
#include "bitbmob.h"
#include "bitboard.h"
#ifdef USE_PENTIUM_ASM
static const unsigned long long mmx_c7e = 0x7e7e7e7e7e7e7e7eULL;
static const unsigned long long mmx_c0f = 0x0f0f0f0f0f0f0f0fULL;
static const unsigned long long mmx_c33 = 0x3333333333333333ULL;
static const unsigned long long mmx_c55 = 0x5555555555555555ULL;
static int useMMX;
#endif
void
init_mmx( void ) {
#ifdef USE_PENTIUM_ASM
unsigned int flg1, flg2, cpuid_edx;
useMMX = 0;
asm volatile (
"pushf\n\t"
"popl %0\n\t"
"movl %0, %1\n\t"
"btc $21, %0\n\t" /* flip ID bit in EFLAGS */
"pushl %0\n\t"
"popf\n\t"
"pushf\n\t"
"popl %0"
: "=r" (flg1), "=r" (flg2) );
if (flg1 != flg2) { /* CPUID supported */
asm volatile (
"movl $1, %%eax\n\t"
"cpuid"
: "=d" (cpuid_edx) :: "%eax", "%ebx", "%ecx" );
useMMX = ((cpuid_edx & 0x00800000u) != 0); /* MMX bit */
}
#endif
}
static BitBoard
generate_all_c( const BitBoard my_bits, // mm7
const BitBoard opp_bits ) { // mm6
BitBoard moves; // mm4
BitBoard opp_inner_bits; // mm5
BitBoard flip_bits; // mm1
BitBoard adjacent_opp_bits; // mm3
opp_inner_bits.high = opp_bits.high & 0x7E7E7E7Eu;
opp_inner_bits.low = opp_bits.low & 0x7E7E7E7Eu;
flip_bits.high = (my_bits.high >> 1) & opp_inner_bits.high; /* 0 m7&o6 m6&o5 .. m2&o1 0 */
flip_bits.low = (my_bits.low >> 1) & opp_inner_bits.low;
flip_bits.high |= (flip_bits.high >> 1) & opp_inner_bits.high; /* 0 m7&o6 (m6&o5)|(m7&o6&o5) .. (m2&o1)|(m3&o2&o1) 0 */
flip_bits.low |= (flip_bits.low >> 1) & opp_inner_bits.low;
adjacent_opp_bits.high = opp_inner_bits.high & (opp_inner_bits.high >> 1); /* 0 o7&o6 o6&o5 o5&o4 o4&o3 o3&o2 o2&o1 0 */
adjacent_opp_bits.low = opp_inner_bits.low & (opp_inner_bits.low >> 1);
flip_bits.high |= (flip_bits.high >> 2) & adjacent_opp_bits.high; /* 0 m7&o6 (m6&o5)|(m7&o6&o5) ..|(m7&o6&o5&o4) ..|(m6&o5&o4&o3)|(m7&o6&o5&o4&o3) .. */
flip_bits.low |= (flip_bits.low >> 2) & adjacent_opp_bits.low;
flip_bits.high |= (flip_bits.high >> 2) & adjacent_opp_bits.high;
flip_bits.low |= (flip_bits.low >> 2) & adjacent_opp_bits.low;
moves.high = flip_bits.high >> 1;
moves.low = flip_bits.low >> 1;
flip_bits.high = (my_bits.high << 1) & opp_inner_bits.high;
flip_bits.low = (my_bits.low << 1) & opp_inner_bits.low;
flip_bits.high |= (flip_bits.high << 1) & opp_inner_bits.high;
flip_bits.low |= (flip_bits.low << 1) & opp_inner_bits.low;
adjacent_opp_bits.high = opp_inner_bits.high & (opp_inner_bits.high << 1);
adjacent_opp_bits.low = opp_inner_bits.low & (opp_inner_bits.low << 1);
flip_bits.high |= (flip_bits.high << 2) & adjacent_opp_bits.high;
flip_bits.low |= (flip_bits.low << 2) & adjacent_opp_bits.low;
flip_bits.high |= (flip_bits.high << 2) & adjacent_opp_bits.high;
flip_bits.low |= (flip_bits.low << 2) & adjacent_opp_bits.low;
moves.high |= flip_bits.high << 1;
moves.low |= flip_bits.low << 1;
flip_bits.high = (my_bits.high >> 8) & opp_bits.high;
flip_bits.low = ((my_bits.low >> 8) | (my_bits.high << 24)) & opp_bits.low;
flip_bits.high |= (flip_bits.high >> 8) & opp_bits.high;
flip_bits.low |= ((flip_bits.low >> 8) | (flip_bits.high << 24)) & opp_bits.low;
adjacent_opp_bits.high = opp_bits.high & (opp_bits.high >> 8);
adjacent_opp_bits.low = opp_bits.low & ((opp_bits.low >> 8) | (opp_bits.high << 24));
flip_bits.high |= (flip_bits.high >> 16) & adjacent_opp_bits.high;
flip_bits.low |= ((flip_bits.low >> 16) | (flip_bits.high << 16)) & adjacent_opp_bits.low;
flip_bits.high |= (flip_bits.high >> 16) & adjacent_opp_bits.high;
flip_bits.low |= ((flip_bits.low >> 16) | (flip_bits.high << 16)) & adjacent_opp_bits.low;
moves.high |= flip_bits.high >> 8;
moves.low |= (flip_bits.low >> 8) | (flip_bits.high << 24);
flip_bits.high = ((my_bits.high << 8) | (my_bits.low >> 24)) & opp_bits.high;
flip_bits.low = (my_bits.low << 8) & opp_bits.low;
flip_bits.high |= ((flip_bits.high << 8) | (flip_bits.low >> 24)) & opp_bits.high;
flip_bits.low |= (flip_bits.low << 8) & opp_bits.low;
adjacent_opp_bits.high = opp_bits.high & ((opp_bits.high << 8) | (opp_bits.low >> 24));
adjacent_opp_bits.low = opp_bits.low & (opp_bits.low << 8);
flip_bits.high |= ((flip_bits.high << 16) | (flip_bits.low >> 16)) & adjacent_opp_bits.high;
flip_bits.low |= (flip_bits.low << 16) & adjacent_opp_bits.low;
flip_bits.high |= ((flip_bits.high << 16) | (flip_bits.low >> 16)) & adjacent_opp_bits.high;
flip_bits.low |= (flip_bits.low << 16) & adjacent_opp_bits.low;
moves.high |= (flip_bits.high << 8) | (flip_bits.low >> 24);
moves.low |= flip_bits.low << 8;
flip_bits.high = (my_bits.high >> 7) & opp_inner_bits.high;
flip_bits.low = ((my_bits.low >> 7) | (my_bits.high << 25)) & opp_inner_bits.low;
flip_bits.high |= (flip_bits.high >> 7) & opp_inner_bits.high;
flip_bits.low |= ((flip_bits.low >> 7) | (flip_bits.high << 25)) & opp_inner_bits.low;
adjacent_opp_bits.high = opp_inner_bits.high & (opp_inner_bits.high >> 7);
adjacent_opp_bits.low = opp_inner_bits.low & ((opp_inner_bits.low >> 7) | (opp_inner_bits.high << 25));
flip_bits.high |= (flip_bits.high >> 14) & adjacent_opp_bits.high;
flip_bits.low |= ((flip_bits.low >> 14) | (flip_bits.high << 18)) & adjacent_opp_bits.low;
flip_bits.high |= (flip_bits.high >> 14) & adjacent_opp_bits.high;
flip_bits.low |= ((flip_bits.low >> 14) | (flip_bits.high << 18)) & adjacent_opp_bits.low;
moves.high |= flip_bits.high >> 7;
moves.low |= (flip_bits.low >> 7) | (flip_bits.high << 25);
flip_bits.high = ((my_bits.high << 7) | (my_bits.low >> 25)) & opp_inner_bits.high;
flip_bits.low = (my_bits.low << 7) & opp_inner_bits.low;
flip_bits.high |= ((flip_bits.high << 7) | (flip_bits.low >> 25)) & opp_inner_bits.high;
flip_bits.low |= (flip_bits.low << 7) & opp_inner_bits.low;
adjacent_opp_bits.high = opp_inner_bits.high & ((opp_inner_bits.high << 7) | (opp_inner_bits.low >> 25));
adjacent_opp_bits.low = opp_inner_bits.low & (opp_inner_bits.low << 7);
flip_bits.high |= ((flip_bits.high << 14) | (flip_bits.low >> 18)) & adjacent_opp_bits.high;
flip_bits.low |= (flip_bits.low << 14) & adjacent_opp_bits.low;
flip_bits.high |= ((flip_bits.high << 14) | (flip_bits.low >> 18)) & adjacent_opp_bits.high;
flip_bits.low |= (flip_bits.low << 14) & adjacent_opp_bits.low;
moves.high |= (flip_bits.high << 7) | (flip_bits.low >> 25);
moves.low |= flip_bits.low << 7;
flip_bits.high = (my_bits.high >> 9) & opp_inner_bits.high;
flip_bits.low = ((my_bits.low >> 9) | (my_bits.high << 23)) & opp_inner_bits.low;
flip_bits.high |= (flip_bits.high >> 9) & opp_inner_bits.high;
flip_bits.low |= ((flip_bits.low >> 9) | (flip_bits.high << 23)) & opp_inner_bits.low;
adjacent_opp_bits.high = opp_inner_bits.high & (opp_inner_bits.high >> 9);
adjacent_opp_bits.low = opp_inner_bits.low & ((opp_inner_bits.low >> 9) | (opp_inner_bits.high << 23));
flip_bits.high |= (flip_bits.high >> 18) & adjacent_opp_bits.high;
flip_bits.low |= ((flip_bits.low >> 18) | (flip_bits.high << 14)) & adjacent_opp_bits.low;
flip_bits.high |= (flip_bits.high >> 18) & adjacent_opp_bits.high;
flip_bits.low |= ((flip_bits.low >> 18) | (flip_bits.high << 14)) & adjacent_opp_bits.low;
moves.high |= flip_bits.high >> 9;
moves.low |= (flip_bits.low >> 9) | (flip_bits.high << 23);
flip_bits.high = ((my_bits.high << 9) | (my_bits.low >> 23)) & opp_inner_bits.high;
flip_bits.low = (my_bits.low << 9) & opp_inner_bits.low;
flip_bits.high |= ((flip_bits.high << 9) | (flip_bits.low >> 23)) & opp_inner_bits.high;
flip_bits.low |= (flip_bits.low << 9) & opp_inner_bits.low;
adjacent_opp_bits.high = opp_inner_bits.high & ((opp_inner_bits.high << 9) | (opp_inner_bits.low >> 23));
adjacent_opp_bits.low = opp_inner_bits.low & (opp_inner_bits.low << 9);
flip_bits.high |= ((flip_bits.high << 18) | (flip_bits.low >> 14)) & adjacent_opp_bits.high;
flip_bits.low |= (flip_bits.low << 18) & adjacent_opp_bits.low;
flip_bits.high |= ((flip_bits.high << 18) | (flip_bits.low >> 14)) & adjacent_opp_bits.high;
flip_bits.low |= (flip_bits.low << 18) & adjacent_opp_bits.low;
moves.high |= (flip_bits.high << 9) | (flip_bits.low >> 23);
moves.low |= flip_bits.low << 9;
moves.high &= ~(my_bits.high | opp_bits.high);
moves.low &= ~(my_bits.low | opp_bits.low);
return moves;
}
#ifdef USE_PENTIUM_ASM
static void pseudo_mobility_mmx(unsigned int my_high, unsigned int opp_high) {
/* mm7: my, mm6: opp */
asm volatile(
/* shift=+1 */ /* shift=+8 */
"movl %%esi, %%eax\n\t" "movq %%mm7, %%mm0\n\t"
"movq %2, %%mm5\n\t"
"shrl $1, %%eax\n\t" "psrlq $8, %%mm0\n\t"
"andl $2122219134, %%edi\n\t" "pand %%mm6, %%mm5\n\t"
"andl %%edi, %%eax\n\t" "pand %%mm6, %%mm0\n\t" /* 0 m7&o6 m6&o5 .. m1&o0 */
"movl %%eax, %%edx\n\t" "movq %%mm0, %%mm1\n\t"
"shrl $1, %%eax\n\t" "psrlq $8, %%mm0\n\t"
"movl %%edi, %%ecx\n\t" "movq %%mm6, %%mm3\n\t"
"andl %%edi, %%eax\n\t" "pand %%mm6, %%mm0\n\t" /* 0 0 m7&o6&o5 .. m2&o1&o0 */
"shrl $1, %%ecx\n\t" "psrlq $8, %%mm3\n\t"
"orl %%edx, %%eax\n\t" "por %%mm1, %%mm0\n\t" /* 0 m7&o6 (m6&o5)|(m7&o6&o5) .. (m1&o0) */
"andl %%edi, %%ecx\n\t" "pand %%mm6, %%mm3\n\t" /* 0 o7&o6 o6&o5 o5&o4 o4&o3 .. */
"movl %%eax, %%edx\n\t" "movq %%mm0, %%mm4\n\t"
"shrl $2, %%eax\n\t" "psrlq $16, %%mm0\n\t"
"andl %%ecx, %%eax\n\t" "pand %%mm3, %%mm0\n\t" /* 0 0 0 m7&o6&o5&o4 (m6&o5&o4&o3)|(m7&o6&o5&o4&o3) .. */
"orl %%eax, %%edx\n\t" "por %%mm0, %%mm4\n\t"
"shrl $2, %%eax\n\t" "psrlq $16, %%mm0\n\t"
"andl %%ecx, %%eax\n\t" "pand %%mm3, %%mm0\n\t" /* 0 0 0 0 0 m7&o6&..&o2 (m6&o5&..&o1)|(m7&o6&..&o1) .. */
"orl %%edx, %%eax\n\t" "por %%mm0, %%mm4\n\t"
"shrl $1, %%eax\n\t" "psrlq $8, %%mm4\n\t" /* result of +8 */
/* shift=-1 */ /* shift=-8 */
"movq %%mm7, %%mm0\n\t"
"addl %%esi, %%esi\n\t" "psllq $8, %%mm0\n\t"
"andl %%edi, %%esi\n\t" "pand %%mm6, %%mm0\n\t"
"movl %%esi, %%edx\n\t" "movq %%mm0, %%mm1\n\t"
"addl %%esi, %%esi\n\t" "psllq $8, %%mm0\n\t"
"andl %%edi, %%esi\n\t" "pand %%mm6, %%mm0\n\t"
"orl %%edx, %%esi\n\t" "por %%mm1, %%mm0\n\t"
"addl %%ecx, %%ecx\n\t" "psllq $8, %%mm3\n\t"
"movl %%esi, %%edx\n\t" "movq %%mm0, %%mm1\n\t"
"shll $2, %%esi\n\t" "psllq $16, %%mm0\n\t"
"andl %%ecx, %%esi\n\t" "pand %%mm3, %%mm0\n\t"
"orl %%esi, %%edx\n\t" "por %%mm0, %%mm1\n\t"
"shll $2, %%esi\n\t" "psllq $16, %%mm0\n\t"
"andl %%ecx, %%esi\n\t" "pand %%mm3, %%mm0\n\t"
"orl %%edx, %%esi\n\t" "por %%mm1, %%mm0\n\t"
"addl %%esi, %%esi\n\t" "psllq $8, %%mm0\n\t"
"orl %%eax, %%esi\n\t" "por %%mm0, %%mm4\n\t"
/* Serialize */ /* shift=+7 */
"movq %%mm7, %%mm0\n\t"
"movd %%esi, %%mm1\n\t"
"psrlq $7, %%mm0\n\t"
"psllq $32, %%mm1\n\t"
"pand %%mm5, %%mm0\n\t"
"por %%mm1, %%mm4\n\t"
"movq %%mm0, %%mm1\n\t"
"psrlq $7, %%mm0\n\t"
"pand %%mm5, %%mm0\n\t"
"movq %%mm5, %%mm3\n\t"
"por %%mm1, %%mm0\n\t"
"psrlq $7, %%mm3\n\t"
"movq %%mm0, %%mm1\n\t"
"pand %%mm5, %%mm3\n\t"
"psrlq $14, %%mm0\n\t"
"pand %%mm3, %%mm0\n\t"
"por %%mm0, %%mm1\n\t"
"movd %%mm5, %%edi\n\t"
"psrlq $14, %%mm0\n\t"
"movd %%mm7, %%esi\n\t"
"pand %%mm3, %%mm0\n\t"
"movl %%edi, %%ecx\n\t"
"por %%mm1, %%mm0\n\t"
"shrl $1, %%ecx\n\t"
"psrlq $7, %%mm0\n\t"
"andl %%edi, %%ecx\n\t"
"por %%mm0, %%mm4\n\t"
/* shift=+1 */ /* shift=-7 */
"movl %%esi, %%eax\n\t" "movq %%mm7, %%mm0\n\t"
"shrl $1, %%eax\n\t" "psllq $7, %%mm0\n\t"
"andl %%edi, %%eax\n\t" "pand %%mm5, %%mm0\n\t"
"movl %%eax, %%edx\n\t" "movq %%mm0, %%mm1\n\t"
"shrl $1, %%eax\n\t" "psllq $7, %%mm0\n\t"
"andl %%edi, %%eax\n\t" "pand %%mm5, %%mm0\n\t"
"orl %%edx, %%eax\n\t" "por %%mm1, %%mm0\n\t"
"psllq $7, %%mm3\n\t"
"movl %%eax, %%edx\n\t" "movq %%mm0, %%mm1\n\t"
"shrl $2, %%eax\n\t" "psllq $14, %%mm0\n\t"
"andl %%ecx, %%eax\n\t" "pand %%mm3, %%mm0\n\t"
"orl %%eax, %%edx\n\t" "por %%mm0, %%mm1\n\t"
"shrl $2, %%eax\n\t" "psllq $14, %%mm0\n\t"
"andl %%ecx, %%eax\n\t" "pand %%mm3, %%mm0\n\t"
"orl %%edx, %%eax\n\t" "por %%mm1, %%mm0\n\t"
"shrl $1, %%eax\n\t" "psllq $7, %%mm0\n\t"
"por %%mm0, %%mm4\n\t"
/* shift=-1 */ /* shift=+9 */
"movq %%mm7, %%mm0\n\t"
"addl %%esi, %%esi\n\t" "psrlq $9, %%mm0\n\t"
"andl %%edi, %%esi\n\t" "pand %%mm5, %%mm0\n\t"
"movl %%esi, %%edx\n\t" "movq %%mm0, %%mm1\n\t"
"addl %%esi, %%esi\n\t" "psrlq $9, %%mm0\n\t"
"andl %%edi, %%esi\n\t" "pand %%mm5, %%mm0\n\t"
"movq %%mm5, %%mm3\n\t"
"orl %%edx, %%esi\n\t" "por %%mm1, %%mm0\n\t"
"psrlq $9, %%mm3\n\t"
"movl %%esi, %%edx\n\t" "movq %%mm0, %%mm1\n\t"
"addl %%ecx, %%ecx\n\t" "pand %%mm5, %%mm3\n\t"
"shll $2, %%esi\n\t" "psrlq $18, %%mm0\n\t"
"andl %%ecx, %%esi\n\t" "pand %%mm3, %%mm0\n\t"
"orl %%esi, %%edx\n\t" "por %%mm0, %%mm1\n\t"
"shll $2, %%esi\n\t" "psrlq $18, %%mm0\n\t"
"andl %%ecx, %%esi\n\t" "pand %%mm3, %%mm0\n\t"
"orl %%edx, %%esi\n\t" "por %%mm1, %%mm0\n\t"
"addl %%esi, %%esi\n\t" "psrlq $9, %%mm0\n\t"
"orl %%eax, %%esi\n\t" "por %%mm0, %%mm4\n\t"
/* Serialize */ /* shift=-9 */
"movq %%mm7, %%mm0\n\t"
"movd %%esi, %%mm1\n\t"
"psllq $9, %%mm0\n\t"
"por %%mm1, %%mm4\n\t"
"pand %%mm5, %%mm0\n\t"
"movq %%mm0, %%mm1\n\t"
"psllq $9, %%mm0\n\t"
"pand %%mm5, %%mm0\n\t"
"por %%mm1, %%mm0\n\t"
"psllq $9, %%mm3\n\t"
"movq %%mm0, %%mm1\n\t"
"psllq $18, %%mm0\n\t"
"pand %%mm3, %%mm0\n\t"
"por %%mm0, %%mm1\n\t"
"psllq $18, %%mm0\n\t"
"pand %%mm3, %%mm0\n\t"
"por %%mm1, %%mm0\n\t"
"psllq $9, %%mm0\n\t"
"por %%mm0, %%mm4\n\t"
/* mm4 is the pseudo-feasible moves at this point. */
/* Let mm7 be the feasible moves, i.e., mm4 restricted to empty squares. */
"por %%mm6, %%mm7\n\t"
"pandn %%mm4, %%mm7"
:: "S" (my_high), "D" (opp_high), "m" (mmx_c7e) : "eax", "edx", "ecx" );
/* mm7: feasible moves */
}
#if 0
BitBoard
generate_all_mmx( const BitBoard my,
const BitBoard opp ) {
BitBoard moves;
asm volatile(
#ifdef ALIGNED_LE_BITBOARD
"movq %1, %%mm7\n\t"
"movq %3, %%mm6"
#else
"movd %1, %%mm7\n\t" /* AMD 22007 pp.171 */
"movd %3, %%mm6\n\t"
"punpckldq %0, %%mm7\n\t"
"punpckldq %2, %%mm6"
#endif
:: "m" (my.high), "m" (my.low), "m" (opp.high), "m" (opp.low) );
pseudo_mobility_mmx(my.high, opp.high);
asm volatile(
#ifdef ALIGNED_LE_BITBOARD
"movq %%mm7, %1\n\t"
#else
"movd %%mm7, %1\n\t"
"psrlq $32, %%mm7\n\t"
"movd %%mm7, %0\n\t"
#endif
"emms" /* Reset the FP/MMX unit. */
: "=g" (moves.high), "=g" (moves.low) );
return moves;
}
// Currently not used, but might come in handy.
int
pop_count_mmx( const BitBoard bits ) {
unsigned int count;
asm volatile(
"movq %1, %%mm0\n\t"
"movq %%mm0, %%mm1\n\t"
"psrld $1, %%mm0\n\t"
"pand %2, %%mm0\n\t"
"psubd %%mm0, %%mm1\n\t"
"movq %%mm1, %%mm0\n\t"
"psrld $2, %%mm1\n\t"
"pand %3, %%mm0\n\t"
"pand %3, %%mm1\n\t"
"paddd %%mm1, %%mm0\n\t"
"movq %%mm0, %%mm1\n\t"
"psrld $4, %%mm0\n\t"
"paddd %%mm1, %%mm0\n\t"
"pand %4, %%mm0\n\t"
#ifdef SSE /* or Enhanced 3DNow (3DNOW && ATHLON) */
"pxor %%mm1, %%mm1\n\t"
"psadbw %%mm1, %%mm0\n\t" /* AMD 22007 pp.138 */
"movd %%mm0, %0\n\t"
#else
"movq %%mm0, %%mm1\n\t"
"psrlq $32, %%mm0\n\t"
"paddd %%mm1, %%mm0\n\t"
"movd %%mm0, %0\n\t"
"imull $16843009, %0, %0\n\t"
"shrl $24, %0\n\t"
#endif
"emms"
: "=r" (count)
: "m" (bits), "m" (mmx_c55), "m" (mmx_c33), "m" (mmx_c0f) );
return count;
}
#endif
#endif // USE_PENTIUM_ASM
int
bitboard_mobility( const BitBoard my_bits,
const BitBoard opp_bits ) {
BitBoard moves;
unsigned int count;
#ifdef USE_PENTIUM_ASM
if (useMMX) {
asm volatile(
#ifdef ALIGNED_LE_BITBOARD
"movq %1, %%mm7\n\t"
"movq %3, %%mm6"
#else
"movd %1, %%mm7\n\t"
"movd %3, %%mm6\n\t"
"punpckldq %0, %%mm7\n\t"
"punpckldq %2, %%mm6"
#endif
:: "m" (my_bits.high), "m" (my_bits.low), "m" (opp_bits.high), "m" (opp_bits.low) );
pseudo_mobility_mmx(my_bits.high, opp_bits.high);
/* Count the moves, i.e., the number of bits set in mm7. */
asm volatile(
"movq %%mm7, %%mm1\n\t"
"psrld $1, %%mm7\n\t"
"pand %1, %%mm7\n\t"
"psubd %%mm7, %%mm1\n\t"
"movq %%mm1, %%mm7\n\t"
"psrld $2, %%mm1\n\t"
"pand %2, %%mm7\n\t"
"pand %2, %%mm1\n\t"
"paddd %%mm1, %%mm7\n\t"
"movq %%mm7, %%mm1\n\t"
"psrld $4, %%mm7\n\t"
"paddd %%mm1, %%mm7\n\t"
"pand %3, %%mm7\n\t"
"movq %%mm7, %%mm1\n\t"
"psrlq $32, %%mm7\n\t"
"paddd %%mm1, %%mm7\n\t"
"movd %%mm7, %0\n\t"
"imull $16843009, %0, %0\n\t" /* AMD 22007 pp.138 */
"shrl $24, %0\n\t"
"emms" /* Reset the FP/MMX unit. */
: "=a" (count)
: "m" (mmx_c55), "m" (mmx_c33), "m" (mmx_c0f) );
} else
#endif
{
moves = generate_all_c( my_bits, opp_bits );
count = non_iterative_popcount( moves.high, moves.low );
}
return count;
}
int
weighted_mobility( const BitBoard my_bits,
const BitBoard opp_bits ) {
unsigned int n1, n2;
BitBoard moves;
#ifdef USE_PENTIUM_ASM
static const unsigned long long mmx_c15 = 0x1555555555555515ULL;
static const unsigned long long mmx_c01 = 0x0100000000000001ULL;
if (useMMX) {
asm volatile(
#ifdef ALIGNED_LE_BITBOARD
"movq %1, %%mm7\n\t"
"movq %3, %%mm6"
#else
"movd %1, %%mm7\n\t"
"movd %3, %%mm6\n\t"
"punpckldq %0, %%mm7\n\t"
"punpckldq %2, %%mm6"
#endif
:: "m" (my_bits.high), "m" (my_bits.low), "m" (opp_bits.high), "m" (opp_bits.low) );
pseudo_mobility_mmx(my_bits.high, opp_bits.high);
/* The weighted mobility is 128 * (#moves + #corner moves). */
asm volatile(
"movq %%mm7, %%mm0\n\t"
"movq %%mm7, %%mm1\n\t"
"psrld $1, %%mm7\n\t"
"pand %1, %%mm0\n\t" /* A8 and H8 */
"pand %2, %%mm7\n\t" /* c55 exclude A1 and H1 */
"psubd %%mm7, %%mm1\n\t"
"paddd %%mm0, %%mm1\n\t"
"movq %%mm1, %%mm7\n\t"
"psrld $2, %%mm1\n\t"
"pand %3, %%mm7\n\t"
"pand %3, %%mm1\n\t"
"paddd %%mm1, %%mm7\n\t"
"movq %%mm7, %%mm1\n\t"
"psrld $4, %%mm7\n\t"
"paddd %%mm1, %%mm7\n\t"
"pand %4, %%mm7\n\t"
"movq %%mm7, %%mm1\n\t"
"psrlq $32, %%mm7\n\t"
"paddd %%mm1, %%mm7\n\t"
"movd %%mm7, %0\n\t"
"emms" /* Reset the FP/MMX unit. */
: "=g" (n1)
: "m" (mmx_c01), "m" (mmx_c15), "m" (mmx_c33), "m" (mmx_c0f) );
} else
#endif
{
moves = generate_all_c( my_bits, opp_bits );
n1 = moves.high - ((moves.high >> 1) & 0x15555555u) + (moves.high & 0x01000000u); /* corner bonus for A1/H1/A8/H8 */
n2 = moves.low - ((moves.low >> 1) & 0x55555515u) + (moves.low & 0x00000001u);
n1 = (n1 & 0x33333333u) + ((n1 >> 2) & 0x33333333u);
n2 = (n2 & 0x33333333u) + ((n2 >> 2) & 0x33333333u);
n1 = (n1 + (n1 >> 4)) & 0x0F0F0F0Fu;
n1 += (n2 + (n2 >> 4)) & 0x0F0F0F0Fu;
}
return ((n1 * 0x01010101u) >> 24) * 128;
}