Module Name: xsrc
Committed By: macallan
Date: Fri Dec 24 05:30:07 UTC 2021
Modified Files:
xsrc/external/mit/xf86-video-suncg14/dist/src: cg14.h
Log Message:
add some comments
To generate a diff of this commit:
cvs rdiff -u -r1.16 -r1.17 \
xsrc/external/mit/xf86-video-suncg14/dist/src/cg14.h
Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.
Modified files:
Index: xsrc/external/mit/xf86-video-suncg14/dist/src/cg14.h
diff -u xsrc/external/mit/xf86-video-suncg14/dist/src/cg14.h:1.16 xsrc/external/mit/xf86-video-suncg14/dist/src/cg14.h:1.17
--- xsrc/external/mit/xf86-video-suncg14/dist/src/cg14.h:1.16 Fri Dec 24 05:22:54 2021
+++ xsrc/external/mit/xf86-video-suncg14/dist/src/cg14.h Fri Dec 24 05:30:07 2021
@@ -135,9 +135,21 @@ write_sx_io(Cg14Ptr p, int reg, uint32_t
p->queuecount++;
}
+/* convenience macros to hide the complexity involved with talking to SX */
+
+/*
+ * issue ALU instruction:
+ * sxi(OPCODE, srcA, srcB, dest, count)
+ */
#define sxi(inst, a, b, d, cnt) write_sx_reg(p, SX_INSTRUCTIONS, inst((a), (b), (d), (cnt)))
+
+/*
+ * issue memory referencing instruction:
+ * sxm(OPCODE, address, start register, count)
+ */
#define sxm(inst, addr, reg, count) write_sx_io(p, (addr) & ~7, inst((reg), (count), (addr) & 7))
+/* hw setup stuff */
Bool CG14SetupCursor(ScreenPtr);
Bool CG14InitAccel(ScreenPtr);
