diff -r ba0c97b018a6 -r 2a24a948b5cf mozilla-bmo1504834-part3.patch
--- a/mozilla-bmo1504834-part3.patch	Mon Jun 05 21:17:55 2023 +0200
+++ b/mozilla-bmo1504834-part3.patch	Sat Jul 29 14:34:45 2023 +0200
@@ -1,64 +1,17 @@
 # HG changeset patch
-# Parent  d1d66f7e4d0e7fd45e91e4fcee07555e72046d48
+# Parent  09cd4ac2cc607e85aa572425b824fbab386af607
 For FF68, AntiAliasing of XULTexts seem to be broken on big endian (s390x). Text and icons of the sandwich-menu to the
 right of the address bar, as well as plugin-windows appears transparant, which usually means unreadable (white on white).
 
-diff --git a/gfx/skia/skia/include/private/SkNx.h b/gfx/skia/skia/include/private/SkNx.h
---- a/gfx/skia/skia/include/private/SkNx.h
-+++ b/gfx/skia/skia/include/private/SkNx.h
-@@ -233,17 +233,28 @@ struct SkNx<1,T> {
-     AI SkNx operator<<(int bits) const { return fVal << bits; }
-     AI SkNx operator>>(int bits) const { return fVal >> bits; }
- 
-     AI SkNx operator+(const SkNx& y) const { return fVal + y.fVal; }
-     AI SkNx operator-(const SkNx& y) const { return fVal - y.fVal; }
-     AI SkNx operator*(const SkNx& y) const { return fVal * y.fVal; }
-     AI SkNx operator/(const SkNx& y) const { return fVal / y.fVal; }
- 
-+    // On Big endian the commented out variant doesn't work,
-+    // and honestly, I have no idea why it exists in the first place.
-+    // The reason its broken is, I think, that it defaults to the double-variant of ToBits()
-+    // which gets a 64-bit integer, and FromBits returns 32-bit,
-+    // cutting off the wrong half again.
-+    // Overall, I see no reason to have ToBits and FromBits at all (even for floats/doubles).
-+    // Still we are only "fixing" this for big endian and leave little endian alone (never touch a running system)
-+#ifdef SK_CPU_BENDIAN
-+    AI SkNx operator&(const SkNx& y) const { return fVal & y.fVal; }
-+#else
-     AI SkNx operator&(const SkNx& y) const { return FromBits(ToBits(fVal) & ToBits(y.fVal)); }
-+#endif
-     AI SkNx operator|(const SkNx& y) const { return FromBits(ToBits(fVal) | ToBits(y.fVal)); }
-     AI SkNx operator^(const SkNx& y) const { return FromBits(ToBits(fVal) ^ ToBits(y.fVal)); }
- 
-     AI SkNx operator==(const SkNx& y) const { return FromBits(fVal == y.fVal ? ~0 : 0); }
-     AI SkNx operator!=(const SkNx& y) const { return FromBits(fVal != y.fVal ? ~0 : 0); }
-     AI SkNx operator<=(const SkNx& y) const { return FromBits(fVal <= y.fVal ? ~0 : 0); }
-     AI SkNx operator>=(const SkNx& y) const { return FromBits(fVal >= y.fVal ? ~0 : 0); }
-     AI SkNx operator< (const SkNx& y) const { return FromBits(fVal <  y.fVal ? ~0 : 0); }
 diff --git a/gfx/skia/skia/src/opts/SkBlitMask_opts.h b/gfx/skia/skia/src/opts/SkBlitMask_opts.h
 --- a/gfx/skia/skia/src/opts/SkBlitMask_opts.h
 +++ b/gfx/skia/skia/src/opts/SkBlitMask_opts.h
-@@ -198,17 +198,23 @@ namespace SK_OPTS_NS {
-                                        const SkAlpha* mask, size_t maskRB,
-                                        int w, int h) {
-         auto fn = [](const Sk4px& d, const Sk4px& aa) {
-             //   = (s + d(1-sa))aa + d(1-aa)
-             //   = s*aa + d(1-sa*aa)
+@@ -210,6 +210,8 @@ namespace SK_OPTS_NS {
              //   ~~~>
              // a = 1*aa + d(1-1*aa) = aa + d(1-aa)
              // c = 0*aa + d(1-1*aa) =      d(1-aa)
-+
-+            // For big endian we have to swap the alpha-mask from 0,0,0,255 to 255,0,0,0
-+#ifdef SK_CPU_BENDIAN
-+            return Sk4px(Sk16b(aa) & Sk16b(255,0,0,0, 255,0,0,0, 255,0,0,0, 255,0,0,0))
-+#else
-             return Sk4px(Sk16b(aa) & Sk16b(0,0,0,255, 0,0,0,255, 0,0,0,255, 0,0,0,255))
-+#endif
++            // TODO: Check this for endian-issues!
++            //       Do we need to switch 255 to the front for all of those tuples?
+             return (aa & Sk4px(skvx::byte16{0,0,0,255, 0,0,0,255, 0,0,0,255, 0,0,0,255}))
                   + d.approxMulDiv255(aa.inv());
          };
-         while (h --> 0) {
-             Sk4px::MapDstAlpha(w, dst, mask, fn);
-             dst  +=  dstRB / sizeof(*dst);
-             mask += maskRB / sizeof(*mask);
-         }
-     }