commit 3c754a9383ac70f316f1b98aec203182de250c42
author Philippe Mathieu-Daudé <f4bug@amsat.org> Thu Sep 27 02:24:15 2018 +0200
committer Paolo Bonzini <pbonzini@redhat.com> Tue Oct 02 19:09:14 2018 +0200
tree fb3a3fa92ebafeef066c2d0b604d312c8430afc4
parent 36960b4d66d2dd59174f230766d1f4eaffec60a3

memory: Refactor common shifting code from accessors

Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Message-Id: <20180927002416.1781-3-f4bug@amsat.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

memory.c

diff --git a/memory.c b/memory.c
index b3051d9..a4d3fa7 100644
--- a/memory.c
+++ b/memory.c
@@ -374,6 +374,21 @@
     }
 }
 
+static inline void memory_region_shift_read_access(uint64_t *value,
+                                                   unsigned shift,
+                                                   uint64_t mask,
+                                                   uint64_t tmp)
+{
+    *value |= (tmp & mask) << shift;
+}
+
+static inline uint64_t memory_region_shift_write_access(uint64_t *value,
+                                                        unsigned shift,
+                                                        uint64_t mask)
+{
+    return (*value >> shift) & mask;
+}
+
 static hwaddr memory_region_to_absolute_addr(MemoryRegion *mr, hwaddr offset)
 {
     MemoryRegion *root;
@@ -418,7 +433,7 @@
         hwaddr abs_addr = memory_region_to_absolute_addr(mr, addr);
         trace_memory_region_ops_read(get_cpu_index(), mr, abs_addr, tmp, size);
     }
-    *value |= (tmp & mask) << shift;
+    memory_region_shift_read_access(value, shift, mask, tmp);
     return MEMTX_OK;
 }
 
@@ -444,7 +459,7 @@
         hwaddr abs_addr = memory_region_to_absolute_addr(mr, addr);
         trace_memory_region_ops_read(get_cpu_index(), mr, abs_addr, tmp, size);
     }
-    *value |= (tmp & mask) << shift;
+    memory_region_shift_read_access(value, shift, mask, tmp);
     return MEMTX_OK;
 }
 
@@ -471,7 +486,7 @@
         hwaddr abs_addr = memory_region_to_absolute_addr(mr, addr);
         trace_memory_region_ops_read(get_cpu_index(), mr, abs_addr, tmp, size);
     }
-    *value |= (tmp & mask) << shift;
+    memory_region_shift_read_access(value, shift, mask, tmp);
     return r;
 }
 
@@ -483,9 +498,8 @@
                                                         uint64_t mask,
                                                         MemTxAttrs attrs)
 {
-    uint64_t tmp;
+    uint64_t tmp = memory_region_shift_write_access(value, shift, mask);
 
-    tmp = (*value >> shift) & mask;
     if (mr->subpage) {
         trace_memory_region_subpage_write(get_cpu_index(), mr, addr, tmp, size);
     } else if (mr == &io_mem_notdirty) {
@@ -509,9 +523,8 @@
                                                 uint64_t mask,
                                                 MemTxAttrs attrs)
 {
-    uint64_t tmp;
+    uint64_t tmp = memory_region_shift_write_access(value, shift, mask);
 
-    tmp = (*value >> shift) & mask;
     if (mr->subpage) {
         trace_memory_region_subpage_write(get_cpu_index(), mr, addr, tmp, size);
     } else if (mr == &io_mem_notdirty) {
@@ -535,9 +548,8 @@
                                                            uint64_t mask,
                                                            MemTxAttrs attrs)
 {
-    uint64_t tmp;
+    uint64_t tmp = memory_region_shift_write_access(value, shift, mask);
 
-    tmp = (*value >> shift) & mask;
     if (mr->subpage) {
         trace_memory_region_subpage_write(get_cpu_index(), mr, addr, tmp, size);
     } else if (mr == &io_mem_notdirty) {