Paul Gofman : d3dx9: Return correct comment length from get_instr_length() .

[Alexandre Julliard]

Module: wine
Branch: master
Commit: 807e5fc04af7a7ea563af1e7da6ebe6662536e6b
URL:    https://source.winehq.org/git/wine.git/?a=commit;h=807e5fc04af7a7ea563af1e7d...

Author: Paul Gofman 
Date:   Wed Jan  9 20:17:52 2019 +0100

d3dx9: Return correct comment length from get_instr_length().

Wine-Bug: https://bugs.winehq.org/show_bug.cgi?id=46435
Signed-off-by: Paul Gofman 
Signed-off-by: Matteo Bruni 
Signed-off-by: Alexandre Julliard

---

dlls/d3dx9_36/shader.c       | 8 +++++---
 dlls/d3dx9_36/tests/shader.c | 1 +
 2 files changed, 6 insertions(+), 3 deletions(-)

diff --git a/dlls/d3dx9_36/shader.c b/dlls/d3dx9_36/shader.c
index acbbf07..e8ce3dd 100644
--- a/dlls/d3dx9_36/shader.c
+++ b/dlls/d3dx9_36/shader.c
@@ -2415,18 +2415,20 @@ HRESULT WINAPI D3DXCreateTextureShader(const DWORD *function, ID3DXTextureShader

static unsigned int get_instr_length(const DWORD *byte_code, unsigned int major, unsigned int minor)
 {
+    DWORD opcode = *byte_code & 0xffff;
     unsigned int len = 0;

+    if (opcode == D3DSIO_COMMENT)
+        return (*byte_code & D3DSI_COMMENTSIZE_MASK) >> D3DSI_COMMENTSIZE_SHIFT;
+
     if (major > 1)
         return (*byte_code & D3DSI_INSTLENGTH_MASK) >> D3DSI_INSTLENGTH_SHIFT;

-    switch (*byte_code & 0xffff)
+    switch (opcode)
     {
         case D3DSIO_END:
             ERR("Unexpected END token.\n");
             return 0;
-        case D3DSIO_COMMENT:
-            return (*byte_code & D3DSI_COMMENTSIZE_MASK) >> D3DSI_COMMENTSIZE_SHIFT;
         case D3DSIO_DEF:
         case D3DSIO_DEFI:
             return 5;
diff --git a/dlls/d3dx9_36/tests/shader.c b/dlls/d3dx9_36/tests/shader.c
index 1086e5e..b67ffb2 100644
--- a/dlls/d3dx9_36/tests/shader.c
+++ b/dlls/d3dx9_36/tests/shader.c
@@ -6457,6 +6457,7 @@ static void test_shader_semantics(void)
     vs_3_0[] =
     {
         0xfffe0300,                         /* vs_3_0 */
+        0x0002fffe, 0x0200000f, 0x00000000, /* comment */
         0x0200001f, 0x80000000, 0x900f0000, /* dcl_position v0 */
         0x0200001f, 0x80000003, 0x900f0001, /* dcl_normal v1 */
         0x0200001f, 0x8001000a, 0x900f0002, /* dcl_color1 v2 */