Convert sub

[qemu] / target-sparc / op_helper.c

diff --git a/target-sparc/op_helper.c b/target-sparc/op_helper.c
index 3665eea..5890f29 100644 (file)
--- a/target-sparc/op_helper.c
+++ b/target-sparc/op_helper.c
@@ -902,6 +902,76 @@ static uint32_t compute_C_addx_xcc(void)
 }
 #endif
 
+static inline uint32_t get_C_sub_icc(target_ulong src1, target_ulong src2)
+{
+    uint32_t ret = 0;
+
+    if ((src1 & 0xffffffffULL) < (src2 & 0xffffffffULL))
+        ret |= PSR_CARRY;
+    return ret;
+}
+
+static inline uint32_t get_V_sub_icc(target_ulong dst, target_ulong src1,
+                                     target_ulong src2)
+{
+    uint32_t ret = 0;
+
+    if (((src1 ^ src2) & (src1 ^ dst)) & (1ULL << 31))
+        ret |= PSR_OVF;
+    return ret;
+}
+
+static uint32_t compute_all_sub(void)
+{
+    uint32_t ret;
+
+    ret = get_NZ_icc(CC_DST);
+    ret |= get_C_sub_icc(CC_SRC, CC_SRC2);
+    ret |= get_V_sub_icc(CC_DST, CC_SRC, CC_SRC2);
+    return ret;
+}
+
+static uint32_t compute_C_sub(void)
+{
+    return get_C_sub_icc(CC_SRC, CC_SRC2);
+}
+
+#ifdef TARGET_SPARC64
+static inline uint32_t get_C_sub_xcc(target_ulong src1, target_ulong src2)
+{
+    uint32_t ret = 0;
+
+    if (src1 < src2)
+        ret |= PSR_CARRY;
+    return ret;
+}
+
+static inline uint32_t get_V_sub_xcc(target_ulong dst, target_ulong src1,
+                                     target_ulong src2)
+{
+    uint32_t ret = 0;
+
+    if (((src1 ^ src2) & (src1 ^ dst)) & (1ULL << 63))
+        ret |= PSR_OVF;
+    return ret;
+}
+
+static uint32_t compute_all_sub_xcc(void)
+{
+    uint32_t ret;
+
+    ret = get_NZ_xcc(CC_DST);
+    ret |= get_C_sub_xcc(CC_SRC, CC_SRC2);
+    ret |= get_V_sub_xcc(CC_DST, CC_SRC, CC_SRC2);
+    return ret;
+}
+
+static uint32_t compute_C_sub_xcc(void)
+{
+    return get_C_sub_xcc(CC_SRC, CC_SRC2);
+}
+#endif
+
 static uint32_t compute_all_logic(void)
 {
     return get_NZ_icc(CC_DST);
@@ -929,6 +999,7 @@ static const CCTable icc_table[CC_OP_NB] = {
     [CC_OP_FLAGS] = { compute_all_flags, compute_C_flags },
     [CC_OP_ADD] = { compute_all_add, compute_C_add },
     [CC_OP_ADDX] = { compute_all_addx, compute_C_addx },
+    [CC_OP_SUB] = { compute_all_sub, compute_C_sub },
     [CC_OP_LOGIC] = { compute_all_logic, compute_C_logic },
 };
 
@@ -938,6 +1009,7 @@ static const CCTable xcc_table[CC_OP_NB] = {
     [CC_OP_FLAGS] = { compute_all_flags_xcc, compute_C_flags_xcc },
     [CC_OP_ADD] = { compute_all_add_xcc, compute_C_add_xcc },
     [CC_OP_ADDX] = { compute_all_addx_xcc, compute_C_addx_xcc },
+    [CC_OP_SUB] = { compute_all_sub_xcc, compute_C_sub_xcc },
     [CC_OP_LOGIC] = { compute_all_logic_xcc, compute_C_logic },
 };
 #endif