/* * x86 shift helpers * * Copyright (c) 2008 Fabrice Bellard * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2 of the License, or (at your option) any later version. * * This library is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with this library; if not, see <http://www.gnu.org/licenses/>. */ #define DATA_BITS (1 << (3 + SHIFT)) #define SHIFT_MASK (DATA_BITS - 1) #if DATA_BITS <= 32 #define SHIFT1_MASK 0x1f #else #define SHIFT1_MASK 0x3f #endif #if DATA_BITS == 8 #define SUFFIX b #define DATA_MASK 0xff #elif DATA_BITS == 16 #define SUFFIX w #define DATA_MASK 0xffff #elif DATA_BITS == 32 #define SUFFIX l #define DATA_MASK 0xffffffff #elif DATA_BITS == 64 #define SUFFIX q #define DATA_MASK 0xffffffffffffffffULL #else #error unhandled operand size #endif target_ulong glue(helper_rcl, SUFFIX)(CPUX86State *env, target_ulong t0, target_ulong t1) { int count, eflags; target_ulong src; target_long res; count = t1 & SHIFT1_MASK; #if DATA_BITS == 16 count = rclw_table[count]; #elif DATA_BITS == 8 count = rclb_table[count]; #endif if (count) { eflags = env->cc_src; t0 &= DATA_MASK; src = t0; res = (t0 << count) | ((target_ulong)(eflags & CC_C) << (count - 1)); if (count > 1) { res |= t0 >> (DATA_BITS + 1 - count); } t0 = res; env->cc_src = (eflags & ~(CC_C | CC_O)) | (lshift(src ^ t0, 11 - (DATA_BITS - 1)) & CC_O) | ((src >> (DATA_BITS - count)) & CC_C); } return t0; } target_ulong glue(helper_rcr, SUFFIX)(CPUX86State *env, target_ulong t0, target_ulong t1) { int count, eflags; target_ulong src; target_long res; count = t1 & SHIFT1_MASK; #if DATA_BITS == 16 count = rclw_table[count]; #elif DATA_BITS == 8 count = rclb_table[count]; #endif if (count) { eflags = env->cc_src; t0 &= DATA_MASK; src = t0; res = (t0 >> count) | ((target_ulong)(eflags & CC_C) << (DATA_BITS - count)); if (count > 1) { res |= t0 << (DATA_BITS + 1 - count); } t0 = res; env->cc_src = (eflags & ~(CC_C | CC_O)) | (lshift(src ^ t0, 11 - (DATA_BITS - 1)) & CC_O) | ((src >> (count - 1)) & CC_C); } return t0; } #undef DATA_BITS #undef SHIFT_MASK #undef SHIFT1_MASK #undef DATA_TYPE #undef DATA_MASK #undef SUFFIX