4 * Copyright (c) 2005-2007 CodeSourcery, LLC
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2 of the License, or (at your option) any later version.
11 * This library is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with this library; if not, see <http://www.gnu.org/licenses/>.
22 #define SIGNBIT (uint32_t)0x80000000
23 #define SIGNBIT64 ((uint64_t)1 << 63)
25 void raise_exception(int tt)
27 env->exception_index = tt;
33 static spinlock_t global_cpu_lock = SPIN_LOCK_UNLOCKED;
37 spin_lock(&global_cpu_lock);
42 spin_unlock(&global_cpu_lock);
45 uint32_t HELPER(neon_tbl)(uint32_t ireg, uint32_t def,
46 uint32_t rn, uint32_t maxindex)
53 table = (uint64_t *)&env->vfp.regs[rn];
55 for (shift = 0; shift < 32; shift += 8) {
56 index = (ireg >> shift) & 0xff;
57 if (index < maxindex) {
58 tmp = (table[index >> 3] >> ((index & 7) << 3)) & 0xff;
61 val |= def & (0xff << shift);
67 #if !defined(CONFIG_USER_ONLY)
69 #define MMUSUFFIX _mmu
72 #include "softmmu_template.h"
75 #include "softmmu_template.h"
78 #include "softmmu_template.h"
81 #include "softmmu_template.h"
83 /* try to fill the TLB and return an exception if error. If retaddr is
84 NULL, it means that the function was called in C code (i.e. not
85 from generated code or from helper.c) */
86 /* XXX: fix it to restore all registers */
87 void tlb_fill (target_ulong addr, int is_write, int mmu_idx, void *retaddr)
94 /* XXX: hack to restore env in all cases, even if not called from
98 ret = cpu_arm_handle_mmu_fault(env, addr, is_write, mmu_idx, 1);
101 /* now we have a real cpu fault */
102 pc = (unsigned long)retaddr;
105 /* the PC is inside the translated code. It means that we have
106 a virtual CPU fault */
107 cpu_restore_state(tb, env, pc, NULL);
110 raise_exception(env->exception_index);
116 /* FIXME: Pass an axplicit pointer to QF to CPUState, and move saturating
117 instructions into helper.c */
118 uint32_t HELPER(add_setq)(uint32_t a, uint32_t b)
120 uint32_t res = a + b;
121 if (((res ^ a) & SIGNBIT) && !((a ^ b) & SIGNBIT))
126 uint32_t HELPER(add_saturate)(uint32_t a, uint32_t b)
128 uint32_t res = a + b;
129 if (((res ^ a) & SIGNBIT) && !((a ^ b) & SIGNBIT)) {
131 res = ~(((int32_t)a >> 31) ^ SIGNBIT);
136 uint32_t HELPER(sub_saturate)(uint32_t a, uint32_t b)
138 uint32_t res = a - b;
139 if (((res ^ a) & SIGNBIT) && ((a ^ b) & SIGNBIT)) {
141 res = ~(((int32_t)a >> 31) ^ SIGNBIT);
146 uint32_t HELPER(double_saturate)(int32_t val)
149 if (val >= 0x40000000) {
152 } else if (val <= (int32_t)0xc0000000) {
161 uint32_t HELPER(add_usaturate)(uint32_t a, uint32_t b)
163 uint32_t res = a + b;
171 uint32_t HELPER(sub_usaturate)(uint32_t a, uint32_t b)
173 uint32_t res = a - b;
181 /* Signed saturation. */
182 static inline uint32_t do_ssat(int32_t val, int shift)
188 mask = (1u << shift) - 1;
192 } else if (top < -1) {
199 /* Unsigned saturation. */
200 static inline uint32_t do_usat(int32_t val, int shift)
204 max = (1u << shift) - 1;
208 } else if (val > max) {
215 /* Signed saturate. */
216 uint32_t HELPER(ssat)(uint32_t x, uint32_t shift)
218 return do_ssat(x, shift);
221 /* Dual halfword signed saturate. */
222 uint32_t HELPER(ssat16)(uint32_t x, uint32_t shift)
226 res = (uint16_t)do_ssat((int16_t)x, shift);
227 res |= do_ssat(((int32_t)x) >> 16, shift) << 16;
231 /* Unsigned saturate. */
232 uint32_t HELPER(usat)(uint32_t x, uint32_t shift)
234 return do_usat(x, shift);
237 /* Dual halfword unsigned saturate. */
238 uint32_t HELPER(usat16)(uint32_t x, uint32_t shift)
242 res = (uint16_t)do_usat((int16_t)x, shift);
243 res |= do_usat(((int32_t)x) >> 16, shift) << 16;
247 void HELPER(wfi)(void)
249 env->exception_index = EXCP_HLT;
254 void HELPER(exception)(uint32_t excp)
256 env->exception_index = excp;
260 uint32_t HELPER(cpsr_read)(void)
262 return cpsr_read(env) & ~CPSR_EXEC;
265 void HELPER(cpsr_write)(uint32_t val, uint32_t mask)
267 cpsr_write(env, val, mask);
270 /* Access to user mode registers from privileged modes. */
271 uint32_t HELPER(get_user_reg)(uint32_t regno)
276 val = env->banked_r13[0];
277 } else if (regno == 14) {
278 val = env->banked_r14[0];
279 } else if (regno >= 8
280 && (env->uncached_cpsr & 0x1f) == ARM_CPU_MODE_FIQ) {
281 val = env->usr_regs[regno - 8];
283 val = env->regs[regno];
288 void HELPER(set_user_reg)(uint32_t regno, uint32_t val)
291 env->banked_r13[0] = val;
292 } else if (regno == 14) {
293 env->banked_r14[0] = val;
294 } else if (regno >= 8
295 && (env->uncached_cpsr & 0x1f) == ARM_CPU_MODE_FIQ) {
296 env->usr_regs[regno - 8] = val;
298 env->regs[regno] = val;
302 /* ??? Flag setting arithmetic is awkward because we need to do comparisons.
303 The only way to do that in TCG is a conditional branch, which clobbers
304 all our temporaries. For now implement these as helper functions. */
306 uint32_t HELPER (add_cc)(uint32_t a, uint32_t b)
310 env->NF = env->ZF = result;
311 env->CF = result < a;
312 env->VF = (a ^ b ^ -1) & (a ^ result);
316 uint32_t HELPER(adc_cc)(uint32_t a, uint32_t b)
321 env->CF = result < a;
324 env->CF = result <= a;
326 env->VF = (a ^ b ^ -1) & (a ^ result);
327 env->NF = env->ZF = result;
331 uint32_t HELPER(sub_cc)(uint32_t a, uint32_t b)
335 env->NF = env->ZF = result;
337 env->VF = (a ^ b) & (a ^ result);
341 uint32_t HELPER(sbc_cc)(uint32_t a, uint32_t b)
351 env->VF = (a ^ b) & (a ^ result);
352 env->NF = env->ZF = result;
356 /* Similarly for variable shift instructions. */
358 uint32_t HELPER(shl)(uint32_t x, uint32_t i)
360 int shift = i & 0xff;
366 uint32_t HELPER(shr)(uint32_t x, uint32_t i)
368 int shift = i & 0xff;
371 return (uint32_t)x >> shift;
374 uint32_t HELPER(sar)(uint32_t x, uint32_t i)
376 int shift = i & 0xff;
379 return (int32_t)x >> shift;
382 uint32_t HELPER(ror)(uint32_t x, uint32_t i)
384 int shift = i & 0xff;
387 return (x >> shift) | (x << (32 - shift));
390 uint32_t HELPER(shl_cc)(uint32_t x, uint32_t i)
392 int shift = i & 0xff;
399 } else if (shift != 0) {
400 env->CF = (x >> (32 - shift)) & 1;
406 uint32_t HELPER(shr_cc)(uint32_t x, uint32_t i)
408 int shift = i & 0xff;
411 env->CF = (x >> 31) & 1;
415 } else if (shift != 0) {
416 env->CF = (x >> (shift - 1)) & 1;
422 uint32_t HELPER(sar_cc)(uint32_t x, uint32_t i)
424 int shift = i & 0xff;
426 env->CF = (x >> 31) & 1;
427 return (int32_t)x >> 31;
428 } else if (shift != 0) {
429 env->CF = (x >> (shift - 1)) & 1;
430 return (int32_t)x >> shift;
435 uint32_t HELPER(ror_cc)(uint32_t x, uint32_t i)
439 shift = shift1 & 0x1f;
442 env->CF = (x >> 31) & 1;
445 env->CF = (x >> (shift - 1)) & 1;
446 return ((uint32_t)x >> shift) | (x << (32 - shift));
450 uint64_t HELPER(neon_add_saturate_s64)(uint64_t src1, uint64_t src2)
455 if (((res ^ src1) & SIGNBIT64) && !((src1 ^ src2) & SIGNBIT64)) {
457 res = ((int64_t)src1 >> 63) ^ ~SIGNBIT64;
462 uint64_t HELPER(neon_add_saturate_u64)(uint64_t src1, uint64_t src2)
474 uint64_t HELPER(neon_sub_saturate_s64)(uint64_t src1, uint64_t src2)
479 if (((res ^ src1) & SIGNBIT64) && ((src1 ^ src2) & SIGNBIT64)) {
481 res = ((int64_t)src1 >> 63) ^ ~SIGNBIT64;
486 uint64_t HELPER(neon_sub_saturate_u64)(uint64_t src1, uint64_t src2)
499 /* These need to return a pair of value, so still use T0/T1. */
500 /* Transpose. Argument order is rather strange to avoid special casing
502 On input T0 = rm, T1 = rd. On output T0 = rd, T1 = rm */
503 void HELPER(neon_trn_u8)(void)
507 rd = ((T0 & 0x00ff00ff) << 8) | (T1 & 0x00ff00ff);
508 rm = ((T1 & 0xff00ff00) >> 8) | (T0 & 0xff00ff00);
513 void HELPER(neon_trn_u16)(void)
517 rd = (T0 << 16) | (T1 & 0xffff);
518 rm = (T1 >> 16) | (T0 & 0xffff0000);
523 /* Worker routines for zip and unzip. */
524 void HELPER(neon_unzip_u8)(void)
528 rd = (T0 & 0xff) | ((T0 >> 8) & 0xff00)
529 | ((T1 << 16) & 0xff0000) | ((T1 << 8) & 0xff000000);
530 rm = ((T0 >> 8) & 0xff) | ((T0 >> 16) & 0xff00)
531 | ((T1 << 8) & 0xff0000) | (T1 & 0xff000000);
536 void HELPER(neon_zip_u8)(void)
540 rd = (T0 & 0xff) | ((T1 << 8) & 0xff00)
541 | ((T0 << 16) & 0xff0000) | ((T1 << 24) & 0xff000000);
542 rm = ((T0 >> 16) & 0xff) | ((T1 >> 8) & 0xff00)
543 | ((T0 >> 8) & 0xff0000) | (T1 & 0xff000000);
548 void HELPER(neon_zip_u16)(void)
552 tmp = (T0 & 0xffff) | (T1 << 16);
553 T1 = (T1 & 0xffff0000) | (T0 >> 16);