nosplit: Limit the effect of NOSPLIT

[nosplit eax+eax] was encoded [eax*2] previously but
this seems against the user's intention.
So in this case, nosplit is ignored now and [eax+eax] will be
generated.
Document is also updated accordingly.

Signed-off-by: Jin Kyu Song <jin.kyu.song@intel.com>

2 files changed, 5 insertions, 3 deletions

diff --git a/assemble.c b/assemble.c
index 9184800..fbd7caf 100644
--- a/assemble.c
+++ b/assemble.c
@@ -2629,7 +2629,7 @@ static enum ea_type process_ea(operand *input, ea *output, int bits,
                     }
                 } else {
                     if (((s == 2 && it != REG_NUM_ESP &&
-                          !(eaflags & EAF_TIMESTWO)) ||
+                          (!(eaflags & EAF_TIMESTWO) || (ht == EAH_SUMMED))) ||
                          s == 3 || s == 5 || s == 9) && bt == -1) {
                         /* convert 3*EAX to EAX+2*EAX */
                         bt = it, bx = ix, s--;
diff --git a/doc/nasmdoc.src b/doc/nasmdoc.src
index 327e3cf..8554a34 100644
--- a/doc/nasmdoc.src
+++ b/doc/nasmdoc.src
@@ -1460,6 +1460,8 @@ fact, it will also split \c{[eax*2+offset]} into
 \c{[eax+eax+offset]}. You can combat this behaviour by the use of
 the \c{NOSPLIT} keyword: \c{[nosplit eax*2]} will force
 \c{[eax*2+0]} to be generated literally.
+However, \c{NOSPLIT} in \c{[nosplit eax+eax]} will be ignored because user's
+intention here is considered as \c{[eax+eax]}.
 
 In 64-bit mode, NASM will by default generate absolute addresses.  The
 \i\c{REL} keyword makes it produce \c{RIP}-relative addresses. Since
@@ -4465,8 +4467,8 @@ be used.
 \c      call foo            ; BND will be prefixed
 \c      nobnd call foo      ; BND will NOT be prefixed
 
-DEFAULT NOBND can disable DEFAULT BND and then \c{BND} prefix will be added
-only when explicitly specified in code.
+\c{DEFAULT NOBND} can disable \c{DEFAULT BND} and then \c{BND} prefix will be
+added only when explicitly specified in code.
 
 \H{section} \i\c{SECTION} or \i\c{SEGMENT}: Changing and \i{Defining
 Sections}