34 static void copy_window_from_phys(CPUXtensaState *env,  in copy_window_from_phys()  argument
37     assert(phys < env->config->nareg);  in copy_window_from_phys()
38     if (phys + n <= env->config->nareg) {  in copy_window_from_phys()
39         memcpy(env->regs + window, env->phys_regs + phys,  in copy_window_from_phys()
42         uint32_t n1 = env->config->nareg - phys;  in copy_window_from_phys()
43         memcpy(env->regs + window, env->phys_regs + phys,  in copy_window_from_phys()
45         memcpy(env->regs + window + n1, env->phys_regs,  in copy_window_from_phys()
50 static void copy_phys_from_window(CPUXtensaState *env,  in copy_phys_from_window()  argument
53     assert(phys < env->config->nareg);  in copy_phys_from_window()
54     if (phys + n <= env->config->nareg) {  in copy_phys_from_window()
55         memcpy(env->phys_regs + phys, env->regs + window,  in copy_phys_from_window()
58         uint32_t n1 = env->config->nareg - phys;  in copy_phys_from_window()
59         memcpy(env->phys_regs + phys, env->regs + window,  in copy_phys_from_window()
61         memcpy(env->phys_regs, env->regs + window + n1,  in copy_phys_from_window()
66 static inline unsigned windowbase_bound(unsigned a, const CPUXtensaState *env)  in windowbase_bound()  argument
68     return a & (env->config->nareg / 4 - 1);  in windowbase_bound()
71 static inline unsigned windowstart_bit(unsigned a, const CPUXtensaState *env)  in windowstart_bit()  argument
73     return 1 << windowbase_bound(a, env);  in windowstart_bit()
76 void xtensa_sync_window_from_phys(CPUXtensaState *env)  in xtensa_sync_window_from_phys()  argument
78     copy_window_from_phys(env, 0, env->sregs[WINDOW_BASE] * 4, 16);  in xtensa_sync_window_from_phys()
81 void xtensa_sync_phys_from_window(CPUXtensaState *env)  in xtensa_sync_phys_from_window()  argument
83     copy_phys_from_window(env, env->sregs[WINDOW_BASE] * 4, 0, 16);  in xtensa_sync_phys_from_window()
86 static void xtensa_rotate_window_abs(CPUXtensaState *env, uint32_t position)  in xtensa_rotate_window_abs()  argument
88     xtensa_sync_phys_from_window(env);  in xtensa_rotate_window_abs()
89     env->sregs[WINDOW_BASE] = windowbase_bound(position, env);  in xtensa_rotate_window_abs()
90     xtensa_sync_window_from_phys(env);  in xtensa_rotate_window_abs()
93 void xtensa_rotate_window(CPUXtensaState *env, uint32_t delta)  in xtensa_rotate_window()  argument
95     xtensa_rotate_window_abs(env, env->sregs[WINDOW_BASE] + delta);  in xtensa_rotate_window()
98 void HELPER(sync_windowbase)(CPUXtensaState *env)  in HELPER()
100     xtensa_rotate_window_abs(env, env->windowbase_next);  in HELPER()
103 void HELPER(entry)(CPUXtensaState *env, uint32_t pc, uint32_t s, uint32_t imm)  in HELPER()
105     int callinc = (env->sregs[PS] & PS_CALLINC) >> PS_CALLINC_SHIFT;  in HELPER()
107     env->regs[(callinc << 2) | (s & 3)] = env->regs[s] - imm;  in HELPER()
108     env->windowbase_next = env->sregs[WINDOW_BASE] + callinc;  in HELPER()
109     env->sregs[WINDOW_START] |= windowstart_bit(env->windowbase_next, env);  in HELPER()
112 void HELPER(window_check)(CPUXtensaState *env, uint32_t pc, uint32_t w)  in HELPER()
114     uint32_t windowbase = windowbase_bound(env->sregs[WINDOW_BASE], env);  in HELPER()
115     uint32_t windowstart = xtensa_replicate_windowstart(env) >>  in HELPER()
116         (env->sregs[WINDOW_BASE] + 1);  in HELPER()
121     xtensa_rotate_window(env, n);  in HELPER()
122     env->sregs[PS] = (env->sregs[PS] & ~PS_OWB) |  in HELPER()
124     env->sregs[EPC1] = env->pc = pc;  in HELPER()
128         HELPER(exception)(env, EXC_WINDOW_OVERFLOW4);  in HELPER()
131         HELPER(exception)(env, EXC_WINDOW_OVERFLOW8);  in HELPER()
134         HELPER(exception)(env, EXC_WINDOW_OVERFLOW12);  in HELPER()
139 void HELPER(test_ill_retw)(CPUXtensaState *env, uint32_t pc)  in HELPER()
141     int n = (env->regs[0] >> 30) & 0x3;  in HELPER()
143     uint32_t windowbase = windowbase_bound(env->sregs[WINDOW_BASE], env);  in HELPER()
144     uint32_t windowstart = env->sregs[WINDOW_START];  in HELPER()
146     if (windowstart & windowstart_bit(windowbase - 1, env)) {  in HELPER()
148     } else if (windowstart & windowstart_bit(windowbase - 2, env)) {  in HELPER()
150     } else if (windowstart & windowstart_bit(windowbase - 3, env)) {  in HELPER()
157                       pc, env->sregs[PS], m, n);  in HELPER()
158         HELPER(exception_cause)(env, pc, ILLEGAL_INSTRUCTION_CAUSE);  in HELPER()
162 void HELPER(test_underflow_retw)(CPUXtensaState *env, uint32_t pc)  in HELPER()
164     int n = (env->regs[0] >> 30) & 0x3;  in HELPER()
166     if (!(env->sregs[WINDOW_START] &  in HELPER()
167           windowstart_bit(env->sregs[WINDOW_BASE] - n, env))) {  in HELPER()
168         uint32_t windowbase = windowbase_bound(env->sregs[WINDOW_BASE], env);  in HELPER()
170         xtensa_rotate_window(env, -n);  in HELPER()
172         env->sregs[PS] = (env->sregs[PS] & ~PS_OWB) |  in HELPER()
174         env->sregs[EPC1] = env->pc = pc;  in HELPER()
177             HELPER(exception)(env, EXC_WINDOW_UNDERFLOW4);  in HELPER()
179             HELPER(exception)(env, EXC_WINDOW_UNDERFLOW8);  in HELPER()
181             HELPER(exception)(env, EXC_WINDOW_UNDERFLOW12);  in HELPER()
186 void HELPER(retw)(CPUXtensaState *env, uint32_t a0)  in HELPER()
190     xtensa_rotate_window(env, -n);  in HELPER()
193 void xtensa_restore_owb(CPUXtensaState *env)  in xtensa_restore_owb()  argument
195     xtensa_rotate_window_abs(env, (env->sregs[PS] & PS_OWB) >> PS_OWB_SHIFT);  in xtensa_restore_owb()
198 void HELPER(restore_owb)(CPUXtensaState *env)  in HELPER()
200     xtensa_restore_owb(env);  in HELPER()
203 void HELPER(movsp)(CPUXtensaState *env, uint32_t pc)  in HELPER()
205     if ((env->sregs[WINDOW_START] &  in HELPER()
206          (windowstart_bit(env->sregs[WINDOW_BASE] - 3, env) |  in HELPER()
207           windowstart_bit(env->sregs[WINDOW_BASE] - 2, env) |  in HELPER()
208           windowstart_bit(env->sregs[WINDOW_BASE] - 1, env))) == 0) {  in HELPER()
209         HELPER(exception_cause)(env, pc, ALLOCA_CAUSE);  in HELPER()