diff options
Diffstat (limited to 'target/i386/shift_helper_template.h')
-rw-r--r-- | target/i386/shift_helper_template.h | 108 |
1 files changed, 108 insertions, 0 deletions
diff --git a/target/i386/shift_helper_template.h b/target/i386/shift_helper_template.h new file mode 100644 index 0000000000..cf91a2d284 --- /dev/null +++ b/target/i386/shift_helper_template.h @@ -0,0 +1,108 @@ +/* + * 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 |