* config/rs6000/rs6000.opt (mmulhw): New option.

	* doc/invoke.texi (-mmulhw): Document.
	* config/rs6000/rs6000.c (rs6000_override_options): Enable -mmulhw
	for 405 and 440.
	* config/rs6000/rs6000.md: Add half-word multiply and
	multiply-accumulate instructions for 405 and 440.

testsuite:
	* gcc.target/powerpc/405-macchw-1.c,
	gcc.target/powerpc/405-macchw-2.c,
	gcc.target/powerpc/405-macchwu-1.c,
	gcc.target/powerpc/405-macchwu-2.c,
	gcc.target/powerpc/405-machhw-1.c,
	gcc.target/powerpc/405-machhw-2.c,
	gcc.target/powerpc/405-machhwu-1.c,
	gcc.target/powerpc/405-machhwu-2.c,
	gcc.target/powerpc/405-maclhw-1.c,
	gcc.target/powerpc/405-maclhw-2.c,
	gcc.target/powerpc/405-maclhwu-1.c,
	gcc.target/powerpc/405-maclhwu-2.c,
	gcc.target/powerpc/405-mulchw-1.c,
	gcc.target/powerpc/405-mulchw-2.c,
	gcc.target/powerpc/405-mulchwu-1.c,
	gcc.target/powerpc/405-mulchwu-2.c,
	gcc.target/powerpc/405-mulhhw-1.c,
	gcc.target/powerpc/405-mulhhw-2.c,
	gcc.target/powerpc/405-mulhhwu-1.c,
	gcc.target/powerpc/405-mulhhwu-2.c,
	gcc.target/powerpc/405-mullhw-1.c,
	gcc.target/powerpc/405-mullhw-2.c,
	gcc.target/powerpc/405-mullhwu-1.c,
	gcc.target/powerpc/405-mullhwu-2.c,
	gcc.target/powerpc/405-nmacchw-1.c,
	gcc.target/powerpc/405-nmacchw-2.c,
	gcc.target/powerpc/405-nmachhw-1.c,
	gcc.target/powerpc/405-nmachhw-2.c,
	gcc.target/powerpc/405-nmaclhw-1.c,
	gcc.target/powerpc/405-nmaclhw-2.c,
	gcc.target/powerpc/440-macchw-1.c,
	gcc.target/powerpc/440-macchw-2.c,
	gcc.target/powerpc/440-macchwu-1.c,
	gcc.target/powerpc/440-macchwu-2.c,
	gcc.target/powerpc/440-machhw-1.c,
	gcc.target/powerpc/440-machhw-2.c,
	gcc.target/powerpc/440-machhwu-1.c,
	gcc.target/powerpc/440-machhwu-2.c,
	gcc.target/powerpc/440-maclhw-1.c,
	gcc.target/powerpc/440-maclhw-2.c,
	gcc.target/powerpc/440-maclhwu-1.c,
	gcc.target/powerpc/440-maclhwu-2.c,
	gcc.target/powerpc/440-mulchw-1.c,
	gcc.target/powerpc/440-mulchw-2.c,
	gcc.target/powerpc/440-mulchwu-1.c,
	gcc.target/powerpc/440-mulchwu-2.c,
	gcc.target/powerpc/440-mulhhw-1.c,
	gcc.target/powerpc/440-mulhhw-2.c,
	gcc.target/powerpc/440-mulhhwu-1.c,
	gcc.target/powerpc/440-mulhhwu-2.c,
	gcc.target/powerpc/440-mullhw-1.c,
	gcc.target/powerpc/440-mullhw-2.c,
	gcc.target/powerpc/440-mullhwu-1.c,
	gcc.target/powerpc/440-mullhwu-2.c,
	gcc.target/powerpc/440-nmacchw-1.c,
	gcc.target/powerpc/440-nmacchw-2.c,
	gcc.target/powerpc/440-nmachhw-1.c,
	gcc.target/powerpc/440-nmachhw-2.c,
	gcc.target/powerpc/440-nmaclhw-1.c,
	gcc.target/powerpc/440-nmaclhw-2.c: New tests.


git-svn-id: https://gcc.gnu.org/svn/gcc/trunk@107344 138bc75d-0d04-0410-961f-82ee72b054a4

1 files changed, 464 insertions, 0 deletions

diff --git a/gcc/config/rs6000/rs6000.md b/gcc/config/rs6000/rs6000.md
index 935775aef3f..14e1fb80531 100644
--- a/gcc/config/rs6000/rs6000.md
+++ b/gcc/config/rs6000/rs6000.md
@@ -878,6 +878,470 @@
   [(set_attr "type" "compare")
    (set_attr "length" "4,8")])
 
+;; IBM 405 and 440 half-word multiplication operations.
+
+(define_insn "*macchwc"
+  [(set (match_operand:CC 3 "cc_reg_operand" "=x")
+        (compare:CC (plus:SI (mult:SI (ashiftrt:SI
+                                       (match_operand:SI 2 "gpc_reg_operand" "r")
+                                       (const_int 16))
+                                      (sign_extend:SI
+                                       (match_operand:HI 1 "gpc_reg_operand" "r")))
+                             (match_operand:SI 4 "gpc_reg_operand" "0"))
+                    (const_int 0)))
+   (set (match_operand:SI 0 "gpc_reg_operand" "=r")
+        (plus:SI (mult:SI (ashiftrt:SI
+                           (match_dup 2)
+                           (const_int 16))
+                          (sign_extend:SI
+                           (match_dup 1)))
+                 (match_dup 4)))]
+  "TARGET_MULHW"
+  "macchw. %0, %1, %2"
+  [(set_attr "type" "imul3")])
+
+(define_insn "*macchw"
+  [(set (match_operand:SI 0 "gpc_reg_operand" "=r")
+        (plus:SI (mult:SI (ashiftrt:SI
+                           (match_operand:SI 2 "gpc_reg_operand" "r")
+                           (const_int 16))
+                          (sign_extend:SI
+                           (match_operand:HI 1 "gpc_reg_operand" "r")))
+                 (match_operand:SI 3 "gpc_reg_operand" "0")))]
+  "TARGET_MULHW"
+  "macchw %0, %1, %2"
+  [(set_attr "type" "imul3")])
+
+(define_insn "*macchwuc"
+  [(set (match_operand:CC 3 "cc_reg_operand" "=x")
+        (compare:CC (plus:SI (mult:SI (lshiftrt:SI
+                                       (match_operand:SI 2 "gpc_reg_operand" "r")
+                                       (const_int 16))
+                                      (zero_extend:SI
+                                       (match_operand:HI 1 "gpc_reg_operand" "r")))
+                             (match_operand:SI 4 "gpc_reg_operand" "0"))
+                    (const_int 0)))
+   (set (match_operand:SI 0 "gpc_reg_operand" "=r")
+        (plus:SI (mult:SI (lshiftrt:SI
+                           (match_dup 2)
+                           (const_int 16))
+                          (zero_extend:SI
+                           (match_dup 1)))
+                 (match_dup 4)))]
+  "TARGET_MULHW"
+  "macchwu. %0, %1, %2"
+  [(set_attr "type" "imul3")])
+
+(define_insn "*macchwu"
+  [(set (match_operand:SI 0 "gpc_reg_operand" "=r")
+        (plus:SI (mult:SI (lshiftrt:SI
+                           (match_operand:SI 2 "gpc_reg_operand" "r")
+                           (const_int 16))
+                          (zero_extend:SI
+                           (match_operand:HI 1 "gpc_reg_operand" "r")))
+                 (match_operand:SI 3 "gpc_reg_operand" "0")))]
+  "TARGET_MULHW"
+  "macchwu %0, %1, %2"
+  [(set_attr "type" "imul3")])
+
+(define_insn "*machhwc"
+  [(set (match_operand:CC 3 "cc_reg_operand" "=x")
+        (compare:CC (plus:SI (mult:SI (ashiftrt:SI
+                                       (match_operand:SI 1 "gpc_reg_operand" "%r")
+                                       (const_int 16))
+                                      (ashiftrt:SI
+                                       (match_operand:SI 2 "gpc_reg_operand" "r")
+                                       (const_int 16)))
+                             (match_operand:SI 4 "gpc_reg_operand" "0"))
+                    (const_int 0)))
+   (set (match_operand:SI 0 "gpc_reg_operand" "=r")
+        (plus:SI (mult:SI (ashiftrt:SI
+                           (match_dup 1)
+                           (const_int 16))
+                          (ashiftrt:SI
+                           (match_dup 2)
+                           (const_int 16)))
+                 (match_dup 4)))]
+  "TARGET_MULHW"
+  "machhw. %0, %1, %2"
+  [(set_attr "type" "imul3")])
+
+(define_insn "*machhw"
+  [(set (match_operand:SI 0 "gpc_reg_operand" "=r")
+        (plus:SI (mult:SI (ashiftrt:SI
+                           (match_operand:SI 1 "gpc_reg_operand" "%r")
+                           (const_int 16))
+                          (ashiftrt:SI
+                           (match_operand:SI 2 "gpc_reg_operand" "r")
+                           (const_int 16)))
+                 (match_operand:SI 3 "gpc_reg_operand" "0")))]
+  "TARGET_MULHW"
+  "machhw %0, %1, %2"
+  [(set_attr "type" "imul3")])
+
+(define_insn "*machhwuc"
+  [(set (match_operand:CC 3 "cc_reg_operand" "=x")
+        (compare:CC (plus:SI (mult:SI (lshiftrt:SI
+                                       (match_operand:SI 1 "gpc_reg_operand" "%r")
+                                       (const_int 16))
+                                      (lshiftrt:SI
+                                       (match_operand:SI 2 "gpc_reg_operand" "r")
+                                       (const_int 16)))
+                             (match_operand:SI 4 "gpc_reg_operand" "0"))
+                    (const_int 0)))
+   (set (match_operand:SI 0 "gpc_reg_operand" "=r")
+        (plus:SI (mult:SI (lshiftrt:SI
+                           (match_dup 1)
+                           (const_int 16))
+                          (lshiftrt:SI
+                           (match_dup 2)
+                           (const_int 16)))
+                 (match_dup 4)))]
+  "TARGET_MULHW"
+  "machhwu. %0, %1, %2"
+  [(set_attr "type" "imul3")])
+
+(define_insn "*machhwu"
+  [(set (match_operand:SI 0 "gpc_reg_operand" "=r")
+        (plus:SI (mult:SI (lshiftrt:SI
+                           (match_operand:SI 1 "gpc_reg_operand" "%r")
+                           (const_int 16))
+                          (lshiftrt:SI
+                           (match_operand:SI 2 "gpc_reg_operand" "r")
+                           (const_int 16)))
+                 (match_operand:SI 3 "gpc_reg_operand" "0")))]
+  "TARGET_MULHW"
+  "machhwu %0, %1, %2"
+  [(set_attr "type" "imul3")])
+
+(define_insn "*maclhwc"
+  [(set (match_operand:CC 3 "cc_reg_operand" "=x")
+        (compare:CC (plus:SI (mult:SI (sign_extend:SI
+                                       (match_operand:HI 1 "gpc_reg_operand" "%r"))
+                                      (sign_extend:SI
+                                       (match_operand:HI 2 "gpc_reg_operand" "r")))
+                             (match_operand:SI 4 "gpc_reg_operand" "0"))
+                    (const_int 0)))
+   (set (match_operand:SI 0 "gpc_reg_operand" "=r")
+        (plus:SI (mult:SI (sign_extend:SI
+                           (match_dup 1))
+                          (sign_extend:SI
+                           (match_dup 2)))
+                 (match_dup 4)))]
+  "TARGET_MULHW"
+  "maclhw. %0, %1, %2"
+  [(set_attr "type" "imul3")])
+
+(define_insn "*maclhw"
+  [(set (match_operand:SI 0 "gpc_reg_operand" "=r")
+        (plus:SI (mult:SI (sign_extend:SI
+                           (match_operand:HI 1 "gpc_reg_operand" "%r"))
+                          (sign_extend:SI
+                           (match_operand:HI 2 "gpc_reg_operand" "r")))
+                 (match_operand:SI 3 "gpc_reg_operand" "0")))]
+  "TARGET_MULHW"
+  "maclhw %0, %1, %2"
+  [(set_attr "type" "imul3")])
+
+(define_insn "*maclhwuc"
+  [(set (match_operand:CC 3 "cc_reg_operand" "=x")
+        (compare:CC (plus:SI (mult:SI (zero_extend:SI
+                                       (match_operand:HI 1 "gpc_reg_operand" "%r"))
+                                      (zero_extend:SI
+                                       (match_operand:HI 2 "gpc_reg_operand" "r")))
+                             (match_operand:SI 4 "gpc_reg_operand" "0"))
+                    (const_int 0)))
+   (set (match_operand:SI 0 "gpc_reg_operand" "=r")
+        (plus:SI (mult:SI (zero_extend:SI
+                           (match_dup 1))
+                          (zero_extend:SI
+                           (match_dup 2)))
+                 (match_dup 4)))]
+  "TARGET_MULHW"
+  "maclhwu. %0, %1, %2"
+  [(set_attr "type" "imul3")])
+
+(define_insn "*maclhwu"
+  [(set (match_operand:SI 0 "gpc_reg_operand" "=r")
+        (plus:SI (mult:SI (zero_extend:SI
+                           (match_operand:HI 1 "gpc_reg_operand" "%r"))
+                          (zero_extend:SI
+                           (match_operand:HI 2 "gpc_reg_operand" "r")))
+                 (match_operand:SI 3 "gpc_reg_operand" "0")))]
+  "TARGET_MULHW"
+  "maclhwu %0, %1, %2"
+  [(set_attr "type" "imul3")])
+
+(define_insn "*nmacchwc"
+  [(set (match_operand:CC 3 "cc_reg_operand" "=x")
+        (compare:CC (minus:SI (match_operand:SI 4 "gpc_reg_operand" "0")
+                              (mult:SI (ashiftrt:SI
+                                        (match_operand:SI 2 "gpc_reg_operand" "r")
+                                        (const_int 16))
+                                       (sign_extend:SI
+                                        (match_operand:HI 1 "gpc_reg_operand" "r"))))
+                    (const_int 0)))
+   (set (match_operand:SI 0 "gpc_reg_operand" "=r")
+        (minus:SI (match_dup 4)
+                  (mult:SI (ashiftrt:SI
+                            (match_dup 2)
+                            (const_int 16))
+                           (sign_extend:SI
+                            (match_dup 1)))))]
+  "TARGET_MULHW"
+  "nmacchw. %0, %1, %2"
+  [(set_attr "type" "imul3")])
+
+(define_insn "*nmacchw"
+  [(set (match_operand:SI 0 "gpc_reg_operand" "=r")
+        (minus:SI (match_operand:SI 3 "gpc_reg_operand" "0")
+                  (mult:SI (ashiftrt:SI
+                            (match_operand:SI 2 "gpc_reg_operand" "r")
+                            (const_int 16))
+                           (sign_extend:SI
+                            (match_operand:HI 1 "gpc_reg_operand" "r")))))]
+  "TARGET_MULHW"
+  "nmacchw %0, %1, %2"
+  [(set_attr "type" "imul3")])
+
+(define_insn "*nmachhwc"
+  [(set (match_operand:CC 3 "cc_reg_operand" "=x")
+        (compare:CC (minus:SI (match_operand:SI 4 "gpc_reg_operand" "0")
+                              (mult:SI (ashiftrt:SI
+                                        (match_operand:SI 1 "gpc_reg_operand" "%r")
+                                        (const_int 16))
+                                       (ashiftrt:SI
+                                        (match_operand:SI 2 "gpc_reg_operand" "r")
+                                        (const_int 16))))
+                    (const_int 0)))
+   (set (match_operand:SI 0 "gpc_reg_operand" "=r")
+        (minus:SI (match_dup 4)
+                  (mult:SI (ashiftrt:SI
+                            (match_dup 1)
+                            (const_int 16))
+                           (ashiftrt:SI
+                            (match_dup 2)
+                            (const_int 16)))))]
+  "TARGET_MULHW"
+  "nmachhw. %0, %1, %2"
+  [(set_attr "type" "imul3")])
+
+(define_insn "*nmachhw"
+  [(set (match_operand:SI 0 "gpc_reg_operand" "=r")
+        (minus:SI (match_operand:SI 3 "gpc_reg_operand" "0")
+                  (mult:SI (ashiftrt:SI
+                            (match_operand:SI 1 "gpc_reg_operand" "%r")
+                            (const_int 16))
+                           (ashiftrt:SI
+                            (match_operand:SI 2 "gpc_reg_operand" "r")
+                            (const_int 16)))))]
+  "TARGET_MULHW"
+  "nmachhw %0, %1, %2"
+  [(set_attr "type" "imul3")])
+
+(define_insn "*nmaclhwc"
+  [(set (match_operand:CC 3 "cc_reg_operand" "=x")
+        (compare:CC (minus:SI (match_operand:SI 4 "gpc_reg_operand" "0")
+                              (mult:SI (sign_extend:SI
+                                        (match_operand:HI 1 "gpc_reg_operand" "%r"))
+                                       (sign_extend:SI
+                                        (match_operand:HI 2 "gpc_reg_operand" "r"))))
+                    (const_int 0)))
+   (set (match_operand:SI 0 "gpc_reg_operand" "=r")
+        (minus:SI (match_dup 4)
+                  (mult:SI (sign_extend:SI
+                            (match_dup 1))
+                           (sign_extend:SI
+                            (match_dup 2)))))]
+  "TARGET_MULHW"
+  "nmaclhw. %0, %1, %2"
+  [(set_attr "type" "imul3")])
+
+(define_insn "*nmaclhw"
+  [(set (match_operand:SI 0 "gpc_reg_operand" "=r")
+        (minus:SI (match_operand:SI 3 "gpc_reg_operand" "0")
+                  (mult:SI (sign_extend:SI
+                            (match_operand:HI 1 "gpc_reg_operand" "%r"))
+                           (sign_extend:SI
+                            (match_operand:HI 2 "gpc_reg_operand" "r")))))]
+  "TARGET_MULHW"
+  "nmaclhw %0, %1, %2"
+  [(set_attr "type" "imul3")])
+
+(define_insn "*mulchwc"
+  [(set (match_operand:CC 3 "cc_reg_operand" "=x")
+        (compare:CC (mult:SI (ashiftrt:SI
+                              (match_operand:SI 2 "gpc_reg_operand" "r")
+                              (const_int 16))
+                             (sign_extend:SI
+                              (match_operand:HI 1 "gpc_reg_operand" "r")))
+                    (const_int 0)))
+   (set (match_operand:SI 0 "gpc_reg_operand" "=r")
+        (mult:SI (ashiftrt:SI
+                  (match_dup 2)
+                  (const_int 16))
+                 (sign_extend:SI
+                  (match_dup 1))))]
+  "TARGET_MULHW"
+  "mulchw. %0, %1, %2"
+  [(set_attr "type" "imul3")])
+
+(define_insn "*mulchw"
+  [(set (match_operand:SI 0 "gpc_reg_operand" "=r")
+        (mult:SI (ashiftrt:SI
+                  (match_operand:SI 2 "gpc_reg_operand" "r")
+                  (const_int 16))
+                 (sign_extend:SI
+                  (match_operand:HI 1 "gpc_reg_operand" "r"))))]
+  "TARGET_MULHW"
+  "mulchw %0, %1, %2"
+  [(set_attr "type" "imul3")])
+
+(define_insn "*mulchwuc"
+  [(set (match_operand:CC 3 "cc_reg_operand" "=x")
+        (compare:CC (mult:SI (lshiftrt:SI
+                              (match_operand:SI 2 "gpc_reg_operand" "r")
+                              (const_int 16))
+                             (zero_extend:SI
+                              (match_operand:HI 1 "gpc_reg_operand" "r")))
+                    (const_int 0)))
+   (set (match_operand:SI 0 "gpc_reg_operand" "=r")
+        (mult:SI (lshiftrt:SI
+                  (match_dup 2)
+                  (const_int 16))
+                 (zero_extend:SI
+                  (match_dup 1))))]
+  "TARGET_MULHW"
+  "mulchwu. %0, %1, %2"
+  [(set_attr "type" "imul3")])
+
+(define_insn "*mulchwu"
+  [(set (match_operand:SI 0 "gpc_reg_operand" "=r")
+        (mult:SI (lshiftrt:SI
+                  (match_operand:SI 2 "gpc_reg_operand" "r")
+                  (const_int 16))
+                 (zero_extend:SI
+                  (match_operand:HI 1 "gpc_reg_operand" "r"))))]
+  "TARGET_MULHW"
+  "mulchwu %0, %1, %2"
+  [(set_attr "type" "imul3")])
+
+(define_insn "*mulhhwc"
+  [(set (match_operand:CC 3 "cc_reg_operand" "=x")
+        (compare:CC (mult:SI (ashiftrt:SI
+                              (match_operand:SI 1 "gpc_reg_operand" "%r")
+                              (const_int 16))
+                             (ashiftrt:SI
+                              (match_operand:SI 2 "gpc_reg_operand" "r")
+                              (const_int 16)))
+                    (const_int 0)))
+   (set (match_operand:SI 0 "gpc_reg_operand" "=r")
+        (mult:SI (ashiftrt:SI
+                  (match_dup 1)
+                  (const_int 16))
+                 (ashiftrt:SI
+                  (match_dup 2)
+                  (const_int 16))))]
+  "TARGET_MULHW"
+  "mulhhw. %0, %1, %2"
+  [(set_attr "type" "imul3")])
+
+(define_insn "*mulhhw"
+  [(set (match_operand:SI 0 "gpc_reg_operand" "=r")
+        (mult:SI (ashiftrt:SI
+                  (match_operand:SI 1 "gpc_reg_operand" "%r")
+                  (const_int 16))
+                 (ashiftrt:SI
+                  (match_operand:SI 2 "gpc_reg_operand" "r")
+                  (const_int 16))))]
+  "TARGET_MULHW"
+  "mulhhw %0, %1, %2"
+  [(set_attr "type" "imul3")])
+
+(define_insn "*mulhhwuc"
+  [(set (match_operand:CC 3 "cc_reg_operand" "=x")
+        (compare:CC (mult:SI (lshiftrt:SI
+                              (match_operand:SI 1 "gpc_reg_operand" "%r")
+                              (const_int 16))
+                             (lshiftrt:SI
+                              (match_operand:SI 2 "gpc_reg_operand" "r")
+                              (const_int 16)))
+                    (const_int 0)))
+   (set (match_operand:SI 0 "gpc_reg_operand" "=r")
+        (mult:SI (lshiftrt:SI
+                  (match_dup 1)
+                  (const_int 16))
+                 (lshiftrt:SI
+                  (match_dup 2)
+                  (const_int 16))))]
+  "TARGET_MULHW"
+  "mulhhwu. %0, %1, %2"
+  [(set_attr "type" "imul3")])
+
+(define_insn "*mulhhwu"
+  [(set (match_operand:SI 0 "gpc_reg_operand" "=r")
+        (mult:SI (lshiftrt:SI
+                  (match_operand:SI 1 "gpc_reg_operand" "%r")
+                  (const_int 16))
+                 (lshiftrt:SI
+                  (match_operand:SI 2 "gpc_reg_operand" "r")
+                  (const_int 16))))]
+  "TARGET_MULHW"
+  "mulhhwu %0, %1, %2"
+  [(set_attr "type" "imul3")])
+
+(define_insn "*mullhwc"
+  [(set (match_operand:CC 3 "cc_reg_operand" "=x")
+        (compare:CC (mult:SI (sign_extend:SI
+                              (match_operand:HI 1 "gpc_reg_operand" "%r"))
+                             (sign_extend:SI
+                              (match_operand:HI 2 "gpc_reg_operand" "r")))
+                    (const_int 0)))
+   (set (match_operand:SI 0 "gpc_reg_operand" "=r")
+        (mult:SI (sign_extend:SI
+                  (match_dup 1))
+                 (sign_extend:SI
+                  (match_dup 2))))]
+  "TARGET_MULHW"
+  "mullhw. %0, %1, %2"
+  [(set_attr "type" "imul3")])
+
+(define_insn "*mullhw"
+  [(set (match_operand:SI 0 "gpc_reg_operand" "=r")
+        (mult:SI (sign_extend:SI
+                  (match_operand:HI 1 "gpc_reg_operand" "%r"))
+                 (sign_extend:SI
+                  (match_operand:HI 2 "gpc_reg_operand" "r"))))]
+  "TARGET_MULHW"
+  "mullhw %0, %1, %2"
+  [(set_attr "type" "imul3")])
+
+(define_insn "*mullhwuc"
+  [(set (match_operand:CC 3 "cc_reg_operand" "=x")
+        (compare:CC (mult:SI (zero_extend:SI
+                              (match_operand:HI 1 "gpc_reg_operand" "%r"))
+                             (zero_extend:SI
+                              (match_operand:HI 2 "gpc_reg_operand" "r")))
+                    (const_int 0)))
+   (set (match_operand:SI 0 "gpc_reg_operand" "=r")
+        (mult:SI (zero_extend:SI
+                  (match_dup 1))
+                 (zero_extend:SI
+                  (match_dup 2))))]
+  "TARGET_MULHW"
+  "mullhwu. %0, %1, %2"
+  [(set_attr "type" "imul3")])
+
+(define_insn "*mullhwu"
+  [(set (match_operand:SI 0 "gpc_reg_operand" "=r")
+        (mult:SI (zero_extend:SI
+                  (match_operand:HI 1 "gpc_reg_operand" "%r"))
+                 (zero_extend:SI
+                  (match_operand:HI 2 "gpc_reg_operand" "r"))))]
+  "TARGET_MULHW"
+  "mullhwu %0, %1, %2"
+  [(set_attr "type" "imul3")])
+
 (define_split
   [(set (match_operand:CC 2 "cc_reg_not_cr0_operand" "")
 	(compare:CC (sign_extend:SI (match_operand:HI 1 "gpc_reg_operand" ""))