2 * UniCore32 helper routines
4 * Copyright (C) 2010-2012 Guan Xuetao
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 as
8 * published by the Free Software Foundation, or (at your option) any
9 * later version. See the COPYING file in the top-level directory.
14 #define SIGNBIT (uint32_t)0x80000000
15 #define SIGNBIT64 ((uint64_t)1 << 63)
17 void HELPER(exception)(CPUUniCore32State *env, uint32_t excp)
19 env->exception_index = excp;
23 static target_ulong asr_read(CPUUniCore32State *env)
27 return env->uncached_asr | (env->NF & 0x80000000) | (ZF << 30) |
28 (env->CF << 29) | ((env->VF & 0x80000000) >> 3);
31 target_ulong cpu_asr_read(CPUUniCore32State *env)
36 target_ulong HELPER(asr_read)(CPUUniCore32State *env)
41 static void asr_write(CPUUniCore32State *env, target_ulong val,
44 if (mask & ASR_NZCV) {
45 env->ZF = (~val) & ASR_Z;
47 env->CF = (val >> 29) & 1;
48 env->VF = (val << 3) & 0x80000000;
51 if ((env->uncached_asr ^ val) & mask & ASR_M) {
52 switch_mode(env, val & ASR_M);
55 env->uncached_asr = (env->uncached_asr & ~mask) | (val & mask);
58 void cpu_asr_write(CPUUniCore32State *env, target_ulong val, target_ulong mask)
60 asr_write(env, val, mask);
63 void HELPER(asr_write)(CPUUniCore32State *env, target_ulong val,
66 asr_write(env, val, mask);
69 /* Access to user mode registers from privileged modes. */
70 uint32_t HELPER(get_user_reg)(CPUUniCore32State *env, uint32_t regno)
75 val = env->banked_r29[0];
76 } else if (regno == 30) {
77 val = env->banked_r30[0];
79 val = env->regs[regno];
84 void HELPER(set_user_reg)(CPUUniCore32State *env, uint32_t regno, uint32_t val)
87 env->banked_r29[0] = val;
88 } else if (regno == 30) {
89 env->banked_r30[0] = val;
91 env->regs[regno] = val;
95 /* ??? Flag setting arithmetic is awkward because we need to do comparisons.
96 The only way to do that in TCG is a conditional branch, which clobbers
97 all our temporaries. For now implement these as helper functions. */
99 uint32_t HELPER(add_cc)(CPUUniCore32State *env, uint32_t a, uint32_t b)
103 env->NF = env->ZF = result;
104 env->CF = result < a;
105 env->VF = (a ^ b ^ -1) & (a ^ result);
109 uint32_t HELPER(adc_cc)(CPUUniCore32State *env, uint32_t a, uint32_t b)
114 env->CF = result < a;
117 env->CF = result <= a;
119 env->VF = (a ^ b ^ -1) & (a ^ result);
120 env->NF = env->ZF = result;
124 uint32_t HELPER(sub_cc)(CPUUniCore32State *env, uint32_t a, uint32_t b)
128 env->NF = env->ZF = result;
130 env->VF = (a ^ b) & (a ^ result);
134 uint32_t HELPER(sbc_cc)(CPUUniCore32State *env, uint32_t a, uint32_t b)
144 env->VF = (a ^ b) & (a ^ result);
145 env->NF = env->ZF = result;
149 /* Similarly for variable shift instructions. */
151 uint32_t HELPER(shl)(uint32_t x, uint32_t i)
153 int shift = i & 0xff;
160 uint32_t HELPER(shr)(uint32_t x, uint32_t i)
162 int shift = i & 0xff;
166 return (uint32_t)x >> shift;
169 uint32_t HELPER(sar)(uint32_t x, uint32_t i)
171 int shift = i & 0xff;
175 return (int32_t)x >> shift;
178 uint32_t HELPER(shl_cc)(CPUUniCore32State *env, uint32_t x, uint32_t i)
180 int shift = i & 0xff;
188 } else if (shift != 0) {
189 env->CF = (x >> (32 - shift)) & 1;
195 uint32_t HELPER(shr_cc)(CPUUniCore32State *env, uint32_t x, uint32_t i)
197 int shift = i & 0xff;
200 env->CF = (x >> 31) & 1;
205 } else if (shift != 0) {
206 env->CF = (x >> (shift - 1)) & 1;
212 uint32_t HELPER(sar_cc)(CPUUniCore32State *env, uint32_t x, uint32_t i)
214 int shift = i & 0xff;
216 env->CF = (x >> 31) & 1;
217 return (int32_t)x >> 31;
218 } else if (shift != 0) {
219 env->CF = (x >> (shift - 1)) & 1;
220 return (int32_t)x >> shift;
225 uint32_t HELPER(ror_cc)(CPUUniCore32State *env, uint32_t x, uint32_t i)
229 shift = shift1 & 0x1f;
232 env->CF = (x >> 31) & 1;
236 env->CF = (x >> (shift - 1)) & 1;
237 return ((uint32_t)x >> shift) | (x << (32 - shift));
241 #ifndef CONFIG_USER_ONLY
242 #define MMUSUFFIX _mmu
245 #include "exec/softmmu_template.h"
248 #include "exec/softmmu_template.h"
251 #include "exec/softmmu_template.h"
254 #include "exec/softmmu_template.h"
256 void tlb_fill(CPUUniCore32State *env, target_ulong addr, int is_write,
257 int mmu_idx, uintptr_t retaddr)
261 ret = uc32_cpu_handle_mmu_fault(env, addr, is_write, mmu_idx);
264 /* now we have a real cpu fault */
265 cpu_restore_state(env, retaddr);