auto import from //depot/cupcake/@135843

1 files changed, 688 insertions, 0 deletions

diff --git a/target-arm/op_helper.c b/target-arm/op_helper.c
new file mode 100644
index 0000000..36de55b
--- /dev/null
+++ b/target-arm/op_helper.c
@@ -0,0 +1,688 @@
+/*
+ *  ARM helper routines
+ *
+ *  Copyright (c) 2005-2007 CodeSourcery, LLC
+ *
+ * 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, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+#include "exec.h"
+#include "helpers.h"
+
+#define SIGNBIT (uint32_t)0x80000000
+#define SIGNBIT64 ((uint64_t)1 << 63)
+
+void raise_exception(int tt)
+{
+    env->exception_index = tt;
+    cpu_loop_exit();
+}
+
+/* thread support */
+
+spinlock_t global_cpu_lock = SPIN_LOCK_UNLOCKED;
+
+void cpu_lock(void)
+{
+    spin_lock(&global_cpu_lock);
+}
+
+void cpu_unlock(void)
+{
+    spin_unlock(&global_cpu_lock);
+}
+
+uint32_t HELPER(neon_tbl)(uint32_t ireg, uint32_t def,
+                          uint32_t rn, uint32_t maxindex)
+{
+    uint32_t val;
+    uint32_t tmp;
+    int index;
+    int shift;
+    uint64_t *table;
+    table = (uint64_t *)&env->vfp.regs[rn];
+    val = 0;
+    for (shift = 0; shift < 32; shift += 8) {
+        index = (ireg >> shift) & 0xff;
+        if (index < maxindex) {
+            tmp = (table[index >> 3] >> (index & 7)) & 0xff;
+            val |= tmp << shift;
+        } else {
+            val |= def & (0xff << shift);
+        }
+    }
+    return val;
+}
+
+#if !defined(CONFIG_USER_ONLY)
+
+static void do_unaligned_access (target_ulong addr, int is_write, int is_user, void *retaddr);
+
+#define MMUSUFFIX _mmu
+#define ALIGNED_ONLY  1
+
+#define SHIFT 0
+#include "softmmu_template.h"
+
+#define SHIFT 1
+#include "softmmu_template.h"
+
+#define SHIFT 2
+#include "softmmu_template.h"
+
+#define SHIFT 3
+#include "softmmu_template.h"
+
+static void do_unaligned_access (target_ulong addr, int is_write, int mmu_idx, void *retaddr)
+{
+    //printf("::UNALIGNED:: addr=%lx is_write=%d is_user=%d retaddr=%p\n", addr, is_write, is_user, retaddr);
+    if (mmu_idx)
+    {
+        env = cpu_single_env;
+        env->cp15.c5_data = 0x00000001;  /* corresponds to an alignment fault */
+        env->cp15.c6_data = addr;
+        env->exception_index = EXCP_DATA_ABORT;
+        cpu_loop_exit();
+    }
+}
+
+/* try to fill the TLB and return an exception if error. If retaddr is
+   NULL, it means that the function was called in C code (i.e. not
+   from generated code or from helper.c) */
+/* XXX: fix it to restore all registers */
+void tlb_fill (target_ulong addr, int is_write, int mmu_idx, void *retaddr)
+{
+    TranslationBlock *tb;
+    CPUState *saved_env;
+    unsigned long pc;
+    int ret;
+
+    /* XXX: hack to restore env in all cases, even if not called from
+       generated code */
+    saved_env = env;
+    env = cpu_single_env;
+    ret = cpu_arm_handle_mmu_fault(env, addr, is_write, mmu_idx, 1);
+    if (unlikely(ret)) {
+        if (retaddr) {
+            /* now we have a real cpu fault */
+            pc = (unsigned long)retaddr;
+            tb = tb_find_pc(pc);
+            if (tb) {
+                /* the PC is inside the translated code. It means that we have
+                   a virtual CPU fault */
+                cpu_restore_state(tb, env, pc, NULL);
+            }
+        }
+        raise_exception(env->exception_index);
+    }
+    env = saved_env;
+}
+
+#if 1
+#include <string.h>
+/*
+ * The following functions are address translation helper functions 
+ * for fast memory access in QEMU. 
+ */
+static target_phys_addr_t v2p_mmu(target_ulong addr, int mmu_idx)
+{
+    int index;
+    target_ulong tlb_addr;
+    target_phys_addr_t physaddr;
+    void *retaddr;
+
+    index = (addr >> TARGET_PAGE_BITS) & (CPU_TLB_SIZE - 1);
+redo:
+    tlb_addr = env->tlb_table[mmu_idx][index].addr_read;
+    if ((addr & TARGET_PAGE_MASK) == (tlb_addr & (TARGET_PAGE_MASK | TLB_INVALID_MASK))) {
+        physaddr = addr + env->tlb_table[mmu_idx][index].addend;
+    } else {
+        /* the page is not in the TLB : fill it */
+        retaddr = GETPC();
+        tlb_fill(addr, 0, mmu_idx, retaddr);
+        goto redo;
+    }
+    return physaddr;
+}
+
+/* 
+ * translation from virtual address of simulated OS 
+ * to the address of simulation host (not the physical 
+ * address of simulated OS.
+ */
+target_phys_addr_t v2p(target_ulong ptr, int mmu_idx)
+{
+    CPUState *saved_env;
+    int index;
+    target_ulong addr;
+    target_phys_addr_t physaddr;
+
+    saved_env = env;
+    env = cpu_single_env;
+    addr = ptr;
+    index = (addr >> TARGET_PAGE_BITS) & (CPU_TLB_SIZE - 1);
+    if (__builtin_expect(env->tlb_table[mmu_idx][index].addr_read != 
+                (addr & TARGET_PAGE_MASK), 0)) 
+    {
+        physaddr = v2p_mmu(addr, mmu_idx);
+    } else {
+        physaddr = (target_phys_addr_t)addr + env->tlb_table[mmu_idx][index].addend;
+    }
+    env = saved_env;
+    return physaddr;
+}
+
+#define MINSIZE(x,y)    ((x) < (y) ? (x) : (y))
+/* copy memory from the simulated virtual space to a buffer in QEMU */
+void vmemcpy(target_ulong ptr, char *buf, int size)
+{
+    if (buf == NULL) return;
+    while (size) {
+        int page_remain = TARGET_PAGE_SIZE - (ptr & ~TARGET_PAGE_MASK);
+        int to_copy = MINSIZE(size, page_remain);
+        char *phys = (char *)v2p(ptr, 0);
+        if (phys == NULL) return;
+        memcpy(buf, phys, to_copy);
+        ptr += to_copy;
+        buf += to_copy;
+        size -= to_copy;
+    }
+}
+
+/* copy memory from the QEMU buffer to simulated virtual space */
+void pmemcpy(target_ulong ptr, const char *buf, int size)
+{
+    if (buf == NULL) return;
+    while (size) {
+        int page_remain = TARGET_PAGE_SIZE - (ptr & ~TARGET_PAGE_MASK);
+        int to_copy = MINSIZE(size, page_remain);
+        char *phys = (char *)v2p(ptr, 0);
+        if (phys == NULL) return;
+        memcpy(phys, buf, to_copy);
+        ptr += to_copy;
+        buf += to_copy;
+        size -= to_copy;
+    }
+}
+
+/* copy a string from the simulated virtual space to a buffer in QEMU */
+void vstrcpy(target_ulong ptr, char *buf, int max)
+{
+    char *phys = 0;
+    unsigned long page = 0;
+
+    if (buf == NULL) return;
+
+    while (max) {
+        if ((ptr & TARGET_PAGE_MASK) != page) {
+            phys = (char *)v2p(ptr, 0);
+            page = ptr & TARGET_PAGE_MASK;
+        }
+        *buf = *phys;
+        if (*phys == '\0')
+            return;
+        ptr ++;
+        buf ++;
+        phys ++;
+        max --;
+    }
+}
+#endif
+#endif
+
+/* FIXME: Pass an axplicit pointer to QF to CPUState, and move saturating
+   instructions into helper.c  */
+uint32_t HELPER(add_setq)(uint32_t a, uint32_t b)
+{
+    uint32_t res = a + b;
+    if (((res ^ a) & SIGNBIT) && !((a ^ b) & SIGNBIT))
+        env->QF = 1;
+    return res;
+}
+
+uint32_t HELPER(add_saturate)(uint32_t a, uint32_t b)
+{
+    uint32_t res = a + b;
+    if (((res ^ a) & SIGNBIT) && !((a ^ b) & SIGNBIT)) {
+        env->QF = 1;
+        res = ~(((int32_t)a >> 31) ^ SIGNBIT);
+    }
+    return res;
+}
+
+uint32_t HELPER(sub_saturate)(uint32_t a, uint32_t b)
+{
+    uint32_t res = a - b;
+    if (((res ^ a) & SIGNBIT) && ((a ^ b) & SIGNBIT)) {
+        env->QF = 1;
+        res = ~(((int32_t)a >> 31) ^ SIGNBIT);
+    }
+    return res;
+}
+
+uint32_t HELPER(double_saturate)(int32_t val)
+{
+    uint32_t res;
+    if (val >= 0x40000000) {
+        res = ~SIGNBIT;
+        env->QF = 1;
+    } else if (val <= (int32_t)0xc0000000) {
+        res = SIGNBIT;
+        env->QF = 1;
+    } else {
+        res = val << 1;
+    }
+    return res;
+}
+
+uint32_t HELPER(add_usaturate)(uint32_t a, uint32_t b)
+{
+    uint32_t res = a + b;
+    if (res < a) {
+        env->QF = 1;
+        res = ~0;
+    }
+    return res;
+}
+
+uint32_t HELPER(sub_usaturate)(uint32_t a, uint32_t b)
+{
+    uint32_t res = a - b;
+    if (res > a) {
+        env->QF = 1;
+        res = 0;
+    }
+    return res;
+}
+
+/* Signed saturation.  */
+static inline uint32_t do_ssat(int32_t val, int shift)
+{
+    int32_t top;
+    uint32_t mask;
+
+    top = val >> shift;
+    mask = (1u << shift) - 1;
+    if (top > 0) {
+        env->QF = 1;
+        return mask;
+    } else if (top < -1) {
+        env->QF = 1;
+        return ~mask;
+    }
+    return val;
+}
+
+/* Unsigned saturation.  */
+static inline uint32_t do_usat(int32_t val, int shift)
+{
+    uint32_t max;
+
+    max = (1u << shift) - 1;
+    if (val < 0) {
+        env->QF = 1;
+        return 0;
+    } else if (val > max) {
+        env->QF = 1;
+        return max;
+    }
+    return val;
+}
+
+/* Signed saturate.  */
+uint32_t HELPER(ssat)(uint32_t x, uint32_t shift)
+{
+    return do_ssat(x, shift);
+}
+
+/* Dual halfword signed saturate.  */
+uint32_t HELPER(ssat16)(uint32_t x, uint32_t shift)
+{
+    uint32_t res;
+
+    res = (uint16_t)do_ssat((int16_t)x, shift);
+    res |= do_ssat(((int32_t)x) >> 16, shift) << 16;
+    return res;
+}
+
+/* Unsigned saturate.  */
+uint32_t HELPER(usat)(uint32_t x, uint32_t shift)
+{
+    return do_usat(x, shift);
+}
+
+/* Dual halfword unsigned saturate.  */
+uint32_t HELPER(usat16)(uint32_t x, uint32_t shift)
+{
+    uint32_t res;
+
+    res = (uint16_t)do_usat((int16_t)x, shift);
+    res |= do_usat(((int32_t)x) >> 16, shift) << 16;
+    return res;
+}
+
+void HELPER(wfi)(void)
+{
+    env->exception_index = EXCP_HLT;
+    env->halted = 1;
+    cpu_loop_exit();
+}
+
+void HELPER(exception)(uint32_t excp)
+{
+    env->exception_index = excp;
+    cpu_loop_exit();
+}
+
+uint32_t HELPER(cpsr_read)(void)
+{
+    return cpsr_read(env) & ~CPSR_EXEC;
+}
+
+void HELPER(cpsr_write)(uint32_t val, uint32_t mask)
+{
+    cpsr_write(env, val, mask);
+}
+
+/* Access to user mode registers from privileged modes.  */
+uint32_t HELPER(get_user_reg)(uint32_t regno)
+{
+    uint32_t val;
+
+    if (regno == 13) {
+        val = env->banked_r13[0];
+    } else if (regno == 14) {
+        val = env->banked_r14[0];
+    } else if (regno >= 8
+               && (env->uncached_cpsr & 0x1f) == ARM_CPU_MODE_FIQ) {
+        val = env->usr_regs[regno - 8];
+    } else {
+        val = env->regs[regno];
+    }
+    return val;
+}
+
+void HELPER(set_user_reg)(uint32_t regno, uint32_t val)
+{
+    if (regno == 13) {
+        env->banked_r13[0] = val;
+    } else if (regno == 14) {
+        env->banked_r14[0] = val;
+    } else if (regno >= 8
+               && (env->uncached_cpsr & 0x1f) == ARM_CPU_MODE_FIQ) {
+        env->usr_regs[regno - 8] = val;
+    } else {
+        env->regs[regno] = val;
+    }
+}
+
+/* ??? Flag setting arithmetic is awkward because we need to do comparisons.
+   The only way to do that in TCG is a conditional branch, which clobbers
+   all our temporaries.  For now implement these as helper functions.  */
+
+uint32_t HELPER (add_cc)(uint32_t a, uint32_t b)
+{
+    uint32_t result;
+    result = T0 + T1;
+    env->NF = env->ZF = result;
+    env->CF = result < a;
+    env->VF = (a ^ b ^ -1) & (a ^ result);
+    return result;
+}
+
+uint32_t HELPER(adc_cc)(uint32_t a, uint32_t b)
+{
+    uint32_t result;
+    if (!env->CF) {
+        result = a + b;
+        env->CF = result < a;
+    } else {
+        result = a + b + 1;
+        env->CF = result <= a;
+    }
+    env->VF = (a ^ b ^ -1) & (a ^ result);
+    env->NF = env->ZF = result;
+    return result;
+}
+
+uint32_t HELPER(sub_cc)(uint32_t a, uint32_t b)
+{
+    uint32_t result;
+    result = a - b;
+    env->NF = env->ZF = result;
+    env->CF = a >= b;
+    env->VF = (a ^ b) & (a ^ result);
+    return result;
+}
+
+uint32_t HELPER(sbc_cc)(uint32_t a, uint32_t b)
+{
+    uint32_t result;
+    if (!env->CF) {
+        result = a - b - 1;
+        env->CF = a > b;
+    } else {
+        result = a - b;
+        env->CF = a >= b;
+    }
+    env->VF = (a ^ b) & (a ^ result);
+    env->NF = env->ZF = result;
+    return result;
+}
+
+/* Similarly for variable shift instructions.  */
+
+uint32_t HELPER(shl)(uint32_t x, uint32_t i)
+{
+    int shift = i & 0xff;
+    if (shift >= 32)
+        return 0;
+    return x << shift;
+}
+
+uint32_t HELPER(shr)(uint32_t x, uint32_t i)
+{
+    int shift = i & 0xff;
+    if (shift >= 32)
+        return 0;
+    return (uint32_t)x >> shift;
+}
+
+uint32_t HELPER(sar)(uint32_t x, uint32_t i)
+{
+    int shift = i & 0xff;
+    if (shift >= 32)
+        shift = 31;
+    return (int32_t)x >> shift;
+}
+
+uint32_t HELPER(ror)(uint32_t x, uint32_t i)
+{
+    int shift = i & 0xff;
+    if (shift == 0)
+        return x;
+    return (x >> shift) | (x << (32 - shift));
+}
+
+uint32_t HELPER(shl_cc)(uint32_t x, uint32_t i)
+{
+    int shift = i & 0xff;
+    if (shift >= 32) {
+        if (shift == 32)
+            env->CF = x & 1;
+        else
+            env->CF = 0;
+        return 0;
+    } else if (shift != 0) {
+        env->CF = (x >> (32 - shift)) & 1;
+        return x << shift;
+    }
+    return x;
+}
+
+uint32_t HELPER(shr_cc)(uint32_t x, uint32_t i)
+{
+    int shift = i & 0xff;
+    if (shift >= 32) {
+        if (shift == 32)
+            env->CF = (x >> 31) & 1;
+        else
+            env->CF = 0;
+        return 0;
+    } else if (shift != 0) {
+        env->CF = (x >> (shift - 1)) & 1;
+        return x >> shift;
+    }
+    return x;
+}
+
+uint32_t HELPER(sar_cc)(uint32_t x, uint32_t i)
+{
+    int shift = i & 0xff;
+    if (shift >= 32) {
+        env->CF = (x >> 31) & 1;
+        return (int32_t)x >> 31;
+    } else if (shift != 0) {
+        env->CF = (x >> (shift - 1)) & 1;
+        return (int32_t)x >> shift;
+    }
+    return x;
+}
+
+uint32_t HELPER(ror_cc)(uint32_t x, uint32_t i)
+{
+    int shift1, shift;
+    shift1 = i & 0xff;
+    shift = shift1 & 0x1f;
+    if (shift == 0) {
+        if (shift1 != 0)
+            env->CF = (x >> 31) & 1;
+        return x;
+    } else {
+        env->CF = (x >> (shift - 1)) & 1;
+        return ((uint32_t)x >> shift) | (x << (32 - shift));
+    }
+}
+
+uint64_t HELPER(neon_add_saturate_s64)(uint64_t src1, uint64_t src2)
+{
+    uint64_t res;
+
+    res = src1 + src2;
+    if (((res ^ src1) & SIGNBIT64) && !((src1 ^ src2) & SIGNBIT64)) {
+        env->QF = 1;
+        res = ((int64_t)src1 >> 63) ^ ~SIGNBIT64;
+    }
+    return res;
+}
+
+uint64_t HELPER(neon_add_saturate_u64)(uint64_t src1, uint64_t src2)
+{
+    uint64_t res;
+
+    res = src1 + src2;
+    if (res < src1) {
+        env->QF = 1;
+        res = ~(uint64_t)0;
+    }
+    return res;
+}
+
+uint64_t HELPER(neon_sub_saturate_s64)(uint64_t src1, uint64_t src2)
+{
+    uint64_t res;
+
+    res = src1 - src2;
+    if (((res ^ src1) & SIGNBIT64) && ((src1 ^ src2) & SIGNBIT64)) {
+        env->QF = 1;
+        res = ((int64_t)src1 >> 63) ^ ~SIGNBIT64;
+    }
+    return res;
+}
+
+uint64_t HELPER(neon_sub_saturate_u64)(uint64_t src1, uint64_t src2)
+{
+    uint64_t res;
+
+    if (src1 < src2) {
+        env->QF = 1;
+        res = 0;
+    } else {
+        res = src1 - src2;
+    }
+    return res;
+}
+
+/* These need to return a pair of value, so still use T0/T1.  */
+/* Transpose.  Argument order is rather strange to avoid special casing
+   the tranlation code.
+   On input T0 = rm, T1 = rd.  On output T0 = rd, T1 = rm  */
+void HELPER(neon_trn_u8)(void)
+{
+    uint32_t rd;
+    uint32_t rm;
+    rd = ((T0 & 0x00ff00ff) << 8) | (T1 & 0x00ff00ff);
+    rm = ((T1 & 0xff00ff00) >> 8) | (T0 & 0xff00ff00);
+    T0 = rd;
+    T1 = rm;
+    FORCE_RET();
+}
+
+void HELPER(neon_trn_u16)(void)
+{
+    uint32_t rd;
+    uint32_t rm;
+    rd = (T0 << 16) | (T1 & 0xffff);
+    rm = (T1 >> 16) | (T0 & 0xffff0000);
+    T0 = rd;
+    T1 = rm;
+    FORCE_RET();
+}
+
+/* Worker routines for zip and unzip.  */
+void HELPER(neon_unzip_u8)(void)
+{
+    uint32_t rd;
+    uint32_t rm;
+    rd = (T0 & 0xff) | ((T0 >> 8) & 0xff00)
+         | ((T1 << 16) & 0xff0000) | ((T1 << 8) & 0xff000000);
+    rm = ((T0 >> 8) & 0xff) | ((T0 >> 16) & 0xff00)
+         | ((T1 << 8) & 0xff0000) | (T1 & 0xff000000);
+    T0 = rd;
+    T1 = rm;
+    FORCE_RET();
+}
+
+void HELPER(neon_zip_u8)(void)
+{
+    uint32_t rd;
+    uint32_t rm;
+    rd = (T0 & 0xff) | ((T1 << 8) & 0xff00)
+         | ((T0 << 16) & 0xff0000) | ((T1 << 24) & 0xff000000);
+    rm = ((T0 >> 16) & 0xff) | ((T1 >> 8) & 0xff00)
+         | ((T0 >> 8) & 0xff0000) | (T1 & 0xff000000);
+    T0 = rd;
+    T1 = rm;
+    FORCE_RET();
+}
+
+void HELPER(neon_zip_u16)(void)
+{
+    uint32_t tmp;
+
+    tmp = (T0 & 0xffff) | (T1 << 16);
+    T1 = (T1 & 0xffff0000) | (T0 >> 16);
+    T0 = tmp;
+    FORCE_RET();
+}