ARMv7 support.

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@3572 c046a42c-6fe2-441c-8c8c-71466251a162

1 files changed, 76 insertions, 2 deletions

diff --git a/target-arm/op_helper.c b/target-arm/op_helper.c
index 6e14a4dff2..a9bd95b057 100644
--- a/target-arm/op_helper.c
+++ b/target-arm/op_helper.c
@@ -1,7 +1,7 @@
 /*
  *  ARM helper routines
  *
- *  Copyright (c) 2005 CodeSourcery, LLC
+ *  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
@@ -175,6 +175,81 @@ void do_vfp_get_fpscr(void)
     T0 |= vfp_exceptbits_from_host(i);
 }
 
+float32 helper_recps_f32(float32 a, float32 b)
+{
+    float_status *s = &env->vfp.fp_status;
+    float32 two = int32_to_float32(2, s);
+    return float32_sub(two, float32_mul(a, b, s), s);
+}
+
+float32 helper_rsqrts_f32(float32 a, float32 b)
+{
+    float_status *s = &env->vfp.fp_status;
+    float32 three = int32_to_float32(3, s);
+    return float32_sub(three, float32_mul(a, b, s), s);
+}
+
+/* TODO: The architecture specifies the value that the estimate functions
+   should return.  We return the exact reciprocal/root instead.  */
+float32 helper_recpe_f32(float32 a)
+{
+    float_status *s = &env->vfp.fp_status;
+    float32 one = int32_to_float32(1, s);
+    return float32_div(one, a, s);
+}
+
+float32 helper_rsqrte_f32(float32 a)
+{
+    float_status *s = &env->vfp.fp_status;
+    float32 one = int32_to_float32(1, s);
+    return float32_div(one, float32_sqrt(a, s), s);
+}
+
+uint32_t helper_recpe_u32(uint32_t a)
+{
+    float_status *s = &env->vfp.fp_status;
+    float32 tmp;
+    tmp = int32_to_float32(a, s);
+    tmp = float32_scalbn(tmp, -32, s);
+    tmp = helper_recpe_f32(tmp);
+    tmp = float32_scalbn(tmp, 31, s);
+    return float32_to_int32(tmp, s);
+}
+
+uint32_t helper_rsqrte_u32(uint32_t a)
+{
+    float_status *s = &env->vfp.fp_status;
+    float32 tmp;
+    tmp = int32_to_float32(a, s);
+    tmp = float32_scalbn(tmp, -32, s);
+    tmp = helper_rsqrte_f32(tmp);
+    tmp = float32_scalbn(tmp, 31, s);
+    return float32_to_int32(tmp, s);
+}
+
+void helper_neon_tbl(int rn, int maxindex)
+{
+    uint32_t val;
+    uint32_t mask;
+    uint32_t tmp;
+    int index;
+    int shift;
+    uint64_t *table;
+    table = (uint64_t *)&env->vfp.regs[rn];
+    val = 0;
+    mask = 0;
+    for (shift = 0; shift < 32; shift += 8) {
+        index = (T1 >> shift) & 0xff;
+        if (index <= maxindex) {
+            tmp = (table[index >> 3] >> (index & 7)) & 0xff;
+            val |= tmp << shift;
+        } else {
+            val |= T0 & (0xff << shift);
+        }
+    }
+    T0 = val;
+}
+
 #if !defined(CONFIG_USER_ONLY)
 
 #define MMUSUFFIX _mmu
@@ -227,5 +302,4 @@ void tlb_fill (target_ulong addr, int is_write, int mmu_idx, void *retaddr)
     }
     env = saved_env;
 }
-
 #endif