.csb now works.

--HG--
branch : dtrg-videocore
rename : mach/vc4/libem/csa.s => mach/vc4/libem/csb.s

mach/vc4/build.mk

@@ -1,5 +1,6 @@
 arch-libem-vc4 := \
-	csa.s
+	csa.s \
+	csb.s
 
 arch-libend-vc4 = \
 	edata.s \

mach/vc4/libem/csb.s

@@ -0,0 +1,33 @@
+#
+/*
+ * VideoCore IV support library for the ACK
+ * © 2013 David Given
+ * This file is redistributable under the terms of the 3-clause BSD license.
+ * See the file 'Copying' in the root of the distribution for the full text.
+ */
+
+#include "videocore.h"
+
+.define	.csb
+.sect .data
+.csb:
+	! on entry:
+	!   r0 = un-fixed-up descriptor
+	!   r1 = value
+	add r0, gp               ! r0 = fixed up descriptor
+
+	adds8 r2, r0, #1         ! r2 = moving pointer
+	ld r3, 4 (r0)            ! r3 = count
+	adds8 r3, r0, r3         ! r3 = end ptr
+
+loop:
+	ld r4, (r2)++
+	b.eq r4, r1, matched      ! r2 points at matching addr
+	addcmpb.le r2, #4, r3, loop
+notmatched:
+	mov r2, r0               ! r2 points at default jump
+matched:
+	ld r2, (r2)              ! load destination address
+    add r2, gp               ! fix up r2
+    b r2                     ! ...and go
+

mach/vc4/ncg/table

@@ -1309,11 +1309,13 @@ PATTERNS
 
 	pat csa                            /* Array-lookup switch */
 		with GPR0 GPR1 STACK
+			kills ALL
 			gen
 				b {LABEL, ".csa"}
 
 	pat csb                            /* Table-lookup switch */
-		with STACK
+		with GPR0 GPR1 STACK
+			kills ALL
 			gen
 				bl {LABEL, ".csb"}
 
@@ -1484,28 +1486,44 @@ PATTERNS
                                         
 	pat loc loc cfi $1==$2 && $1==QUAD /* Convert float -> integer */
 		leaving
+			loc 0
+#if 0
 			cal ".cfi"
 			lfr QUAD
+#endif
 
 	pat loc loc cfu $1==$2 && $1==QUAD /* Convert float -> unsigned */
 		leaving
+			loc 0
+#if 0
 			cal ".cfu"
 			lfr QUAD
+#endif
 
 	pat loc loc cif $1==$2 && $1==QUAD /* Convert integer -> float */
 		leaving
+			loc 0
+#if 0
 			cal ".cif"
 			lfr QUAD
+#endif
 
 	pat loc loc cuf $1==$2 && $1==QUAD /* Convert unsigned -> float */
 		leaving
+			loc 0
+#if 0
 			cal ".cuf"
 			lfr QUAD
+#endif
 
 	pat fef                            /* Split float */
 		leaving
+			loc 0
+			loc 0
+#if 0
 			cal ".cuf"
 			lfr QUAD*2
+#endif
 
 	pat fif                            /* Multiply float and split (?) */
 		leaving