x86: Fix the test for negative pixel count in optimized rgb565 spans.

There's a bunch of bogus looking stuff the count handling in this code, but
this fixes the testcases we have.

diff --git a/src/mesa/x86/read_rgba_span_x86.S b/src/mesa/x86/read_rgba_span_x86.S
index 80144b8..92b1c2d 100644 (file)
--- a/src/mesa/x86/read_rgba_span_x86.S
+++ b/src/mesa/x86/read_rgba_span_x86.S
@@ -522,7 +522,7 @@ _generic_read_RGBA_span_RGB565_MMX:
        addl    $32,%esp
 
        sarl    $2, %ecx
-       jle     .L01            /* Bail early if the count is negative. */
+       jl      .L01            /* Bail early if the count is negative. */
        jmp     .L02
 
 .L03: