+2013-03-02 David Holsgrove <david.holsgrove@xilinx.com>
+
+ * config/microblaze/microblaze.c:
+ Check mcpu, pcmp requirement and set TARGET_REORDER to 0 if not met.
+ * config/microblaze/microblaze.h: Add -mxl-reorder to DRIVER_SELF_SPECS
+ * config/microblaze/microblaze.md: New bswapsi2 and bswaphi2
+ instructions emitted if TARGET_REORDER
+ * config/microblaze/microblaze.opt: New option -mxl-reorder set to 1
+ or 0 for -m/-mno case, but initialises as 2 to detect default use case
+ separately
+
2013-03-01 Xinliang David Li <davidxl@google.com>
* tree-ssa-uninit.c (compute_control_dep_chain): Limit post-dom
microblaze_has_clz = 0;
}
+ /* TARGET_REORDER defaults to 2 if -mxl-reorder not specified. */
+ ver = MICROBLAZE_VERSION_COMPARE (microblaze_select_cpu, "v8.30.a");
+ if (ver < 0)
+ {
+ if (TARGET_REORDER == 1)
+ warning (0, "-mxl-reorder can be used only with -mcpu=v8.30.a or greater");
+ TARGET_REORDER = 0;
+ }
+ else if ((ver == 0) && !TARGET_PATTERN_COMPARE)
+ {
+ if (TARGET_REORDER == 1)
+ warning (0, "-mxl-reorder requires -mxl-pattern-compare for -mcpu=v8.30.a");
+ TARGET_REORDER = 0;
+ }
+
if (TARGET_MULTIPLY_HIGH && TARGET_SOFT_MUL)
error ("-mxl-multiply-high requires -mno-xl-soft-mul");
"%{mno-xl-barrel-shift:%<mxl-barrel-shift}", \
"%{mno-xl-pattern-compare:%<mxl-pattern-compare}", \
"%{mxl-soft-div:%<mno-xl-soft-div}", \
+ "%{mxl-reorder:%<mno-xl-reorder}", \
"%{msoft-float:%<mhard-float}"
/* Tell collect what flags to pass to nm. */
(automata_option "time")
(automata_option "progress")
+(define_insn "bswapsi2"
+ [(set (match_operand:SI 0 "register_operand" "=r")
+ (bswap:SI (match_operand:SI 1 "register_operand" "r")))]
+ "TARGET_REORDER"
+ "swapb %0, %1"
+)
+
+(define_insn "bswaphi2"
+ [(set (match_operand:HI 0 "register_operand" "=r")
+ (bswap:HI (match_operand:HI 1 "register_operand" "r")))]
+ "TARGET_REORDER"
+ "swaph %0, %1"
+)
+
;;----------------------------------------------------------------
;; Microblaze delay slot description
;;----------------------------------------------------------------
Target Mask(SOFT_MUL)
Use the soft multiply emulation (default)
+mxl-reorder
+Target Var(TARGET_REORDER) Init(2)
+Use reorder instructions (swap and byte reversed load/store) (default)
+
mxl-soft-div
Target Mask(SOFT_DIV)
Use the software emulation for divides (default)