tcg/README: improve description of bswap*

Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>

diff --git a/tcg/README b/tcg/README
index 3433908460a3790ff6cfa626bc3c064b58bea014..68d27ffa6d716641ef77733f948c4fbea7b5458a 100644 (file)
--- a/tcg/README
+++ b/tcg/README
@@ -268,13 +268,13 @@ ext32u_i64 t0, t1
 
 * bswap16_i32/i64 t0, t1
 
-16 bit byte swap on a 32/64 bit value. The two/six high order bytes must be
-set to zero.
+16 bit byte swap on a 32/64 bit value. It assumes that the two/six high order
+bytes are set to zero.
 
 * bswap32_i32/i64 t0, t1
 
-32 bit byte swap on a 32/64 bit value. With a 64 bit value, the four high
-order bytes must be set to zero.
+32 bit byte swap on a 32/64 bit value. With a 64 bit value, it assumes that
+the four high order bytes are set to zero.
 
 * bswap64_i64 t0, t1