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 CPUState *cs = CPU(uc32_env_get_cpu(env));
21 cs->exception_index = excp;
25 static target_ulong asr_read(CPUUniCore32State *env)
29 return env->uncached_asr | (env->NF & 0x80000000) | (ZF << 30) |
30 (env->CF << 29) | ((env->VF & 0x80000000) >> 3);
33 target_ulong cpu_asr_read(CPUUniCore32State *env)
38 target_ulong HELPER(asr_read)(CPUUniCore32State *env)
43 static void asr_write(CPUUniCore32State *env, target_ulong val,
46 if (mask & ASR_NZCV) {
47 env->ZF = (~val) & ASR_Z;
49 env->CF = (val >> 29) & 1;
50 env->VF = (val << 3) & 0x80000000;
53 if ((env->uncached_asr ^ val) & mask & ASR_M) {
54 switch_mode(env, val & ASR_M);
57 env->uncached_asr = (env->uncached_asr & ~mask) | (val & mask);
60 void cpu_asr_write(CPUUniCore32State *env, target_ulong val, target_ulong mask)
62 asr_write(env, val, mask);
65 void HELPER(asr_write)(CPUUniCore32State *env, target_ulong val,
68 asr_write(env, val, mask);
71 /* Access to user mode registers from privileged modes. */
72 uint32_t HELPER(get_user_reg)(CPUUniCore32State *env, uint32_t regno)
77 val = env->banked_r29[0];
78 } else if (regno == 30) {
79 val = env->banked_r30[0];
81 val = env->regs[regno];
86 void HELPER(set_user_reg)(CPUUniCore32State *env, uint32_t regno, uint32_t val)
89 env->banked_r29[0] = val;
90 } else if (regno == 30) {
91 env->banked_r30[0] = val;
93 env->regs[regno] = val;
97 /* ??? Flag setting arithmetic is awkward because we need to do comparisons.
98 The only way to do that in TCG is a conditional branch, which clobbers
99 all our temporaries. For now implement these as helper functions. */
101 uint32_t HELPER(add_cc)(CPUUniCore32State *env, uint32_t a, uint32_t b)
105 env->NF = env->ZF = result;
106 env->CF = result < a;
107 env->VF = (a ^ b ^ -1) & (a ^ result);
111 uint32_t HELPER(adc_cc)(CPUUniCore32State *env, uint32_t a, uint32_t b)
116 env->CF = result < a;
119 env->CF = result <= a;
121 env->VF = (a ^ b ^ -1) & (a ^ result);
122 env->NF = env->ZF = result;
126 uint32_t HELPER(sub_cc)(CPUUniCore32State *env, uint32_t a, uint32_t b)
130 env->NF = env->ZF = result;
132 env->VF = (a ^ b) & (a ^ result);
136 uint32_t HELPER(sbc_cc)(CPUUniCore32State *env, uint32_t a, uint32_t b)
146 env->VF = (a ^ b) & (a ^ result);
147 env->NF = env->ZF = result;
151 /* Similarly for variable shift instructions. */
153 uint32_t HELPER(shl)(uint32_t x, uint32_t i)
155 int shift = i & 0xff;
162 uint32_t HELPER(shr)(uint32_t x, uint32_t i)
164 int shift = i & 0xff;
168 return (uint32_t)x >> shift;
171 uint32_t HELPER(sar)(uint32_t x, uint32_t i)
173 int shift = i & 0xff;
177 return (int32_t)x >> shift;
180 uint32_t HELPER(shl_cc)(CPUUniCore32State *env, uint32_t x, uint32_t i)
182 int shift = i & 0xff;
190 } else if (shift != 0) {
191 env->CF = (x >> (32 - shift)) & 1;
197 uint32_t HELPER(shr_cc)(CPUUniCore32State *env, uint32_t x, uint32_t i)
199 int shift = i & 0xff;
202 env->CF = (x >> 31) & 1;
207 } else if (shift != 0) {
208 env->CF = (x >> (shift - 1)) & 1;
214 uint32_t HELPER(sar_cc)(CPUUniCore32State *env, uint32_t x, uint32_t i)
216 int shift = i & 0xff;
218 env->CF = (x >> 31) & 1;
219 return (int32_t)x >> 31;
220 } else if (shift != 0) {
221 env->CF = (x >> (shift - 1)) & 1;
222 return (int32_t)x >> shift;
227 uint32_t HELPER(ror_cc)(CPUUniCore32State *env, uint32_t x, uint32_t i)
231 shift = shift1 & 0x1f;
234 env->CF = (x >> 31) & 1;
238 env->CF = (x >> (shift - 1)) & 1;
239 return ((uint32_t)x >> shift) | (x << (32 - shift));
243 #ifndef CONFIG_USER_ONLY
244 #include "exec/softmmu_exec.h"
246 #define MMUSUFFIX _mmu
249 #include "exec/softmmu_template.h"
252 #include "exec/softmmu_template.h"
255 #include "exec/softmmu_template.h"
258 #include "exec/softmmu_template.h"
260 void tlb_fill(CPUState *cs, target_ulong addr, int is_write,
261 int mmu_idx, uintptr_t retaddr)
265 ret = uc32_cpu_handle_mmu_fault(cs, addr, is_write, mmu_idx);
267 UniCore32CPU *cpu = UNICORE32_CPU(cs);
268 CPUUniCore32State *env = &cpu->env;
271 /* now we have a real cpu fault */
272 cpu_restore_state(env, retaddr);