Simplify emit_CopyB_prolog() and remove an unnecessary bit filter before calling it.

[r22598]

diff --git a/ir/be/ia32/ia32_emitter.c b/ir/be/ia32/ia32_emitter.c
index c4eabd8..af53e41 100644 (file)
--- a/ir/be/ia32/ia32_emitter.c
+++ b/ir/be/ia32/ia32_emitter.c
@@ -1373,21 +1373,13 @@ static void emit_CopyB_prolog(unsigned size)
        be_emit_cstring("\tcld");
        be_emit_finish_line_gas(NULL);
 
-       switch (size) {
-       case 1:
-               be_emit_cstring("\tmovsb");
-               be_emit_finish_line_gas(NULL);
-               break;
-       case 2:
-               be_emit_cstring("\tmovsw");
-               be_emit_finish_line_gas(NULL);
-               break;
-       case 3:
+       if (size & 1) {
                be_emit_cstring("\tmovsb");
                be_emit_finish_line_gas(NULL);
+       }
+       if (size & 2) {
                be_emit_cstring("\tmovsw");
                be_emit_finish_line_gas(NULL);
-               break;
        }
 }
 
@@ -1411,7 +1403,7 @@ static void emit_ia32_CopyB_i(const ir_node *node)
 {
        unsigned size = get_ia32_copyb_size(node);
 
-       emit_CopyB_prolog(size & 0x3);
+       emit_CopyB_prolog(size);
 
        size >>= 2;
        while (size--) {