config.gcc (mipsisa64*-*-linux*): New configuration.

	* config.gcc (mipsisa64*-*-linux*): New configuration.  Set ISA
	to MIPS64r2 for mipsisa64r2*.
	* config/mips/mips.h (GENERATE_MIPS16E): Update comment.
	(ISA_MIPS64R2): New macro.
	(TARGET_CPU_CPP_BUILTINS, MULTILIB_ISA_DEFAULT): Handle it.
	(ISA_HAS_64BIT_REGS, ISA_HAS_MUL3, ISA_HAS_FP_CONDMOVE,
	ISA_HAS_8CC, ISA_HAS_FP4, ISA_HAS_PAIRED_SINGLE,
	ISA_HAS_MADD_MSUB, ISA_HAS_NMADD4_NMSUB4, ISA_HAS_CLZ_CLO,
	ISA_HAS_ROR, ISA_HAS_PREFETCH, ISA_HAS_PREFETCHX, ISA_HAS_SEB_SEH,
	ISA_HAS_EXT_INS, ISA_HAS_MXHC1, ISA_HAS_HILO_INTERLOCKS,
	ISA_HAS_SYNCI, MIN_FPRS_PER_FMT): Return true for ISA_MIPS64R2.
	(MIPS_ISA_LEVEL_SPEC, ASM_SPEC, LINK_SPEC): Handle -mips64r2.
	(TARGET_LOONGSON_2E, TARGET_LOONGSON_2F, TARGET_LOONGSON_2EF):
	Move up to keep list alphabetically sorted.
	(TUNE_20KC, TUNE_24K, TUNE_74K, TUNE_LOONGSON_2EF): Likewise.
	* config/mips/mips.c (mips_cpu_info_table): Add default MIPS64r2
	processor.
	* doc/invoke.texi (MIPS Options): Add -mips64r2.
	(-march=@var{arch}): Add mips64r2.

testsuite/

	* gcc.target/mips/ext-1.c: New test.

From-SVN: r138448

7 files changed, 121 insertions, 36 deletions

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index c8674e5..8d21c79 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,25 @@
+2008-07-31  Adam Nemet  <anemet@caviumnetworks.com>
+
+	* config.gcc (mipsisa64r2*-*-linux*): New configuration.  Set ISA
+	to MIPS64r2.
+	* config/mips/mips.h (GENERATE_MIPS16E): Update comment.
+	(ISA_MIPS64R2): New macro.
+	(TARGET_CPU_CPP_BUILTINS, MULTILIB_ISA_DEFAULT): Handle it.
+	(ISA_HAS_64BIT_REGS, ISA_HAS_MUL3, ISA_HAS_FP_CONDMOVE,
+	ISA_HAS_8CC, ISA_HAS_FP4, ISA_HAS_PAIRED_SINGLE,
+	ISA_HAS_MADD_MSUB, ISA_HAS_NMADD4_NMSUB4, ISA_HAS_CLZ_CLO,
+	ISA_HAS_ROR, ISA_HAS_PREFETCH, ISA_HAS_PREFETCHX, ISA_HAS_SEB_SEH,
+	ISA_HAS_EXT_INS, ISA_HAS_MXHC1, ISA_HAS_HILO_INTERLOCKS,
+	ISA_HAS_SYNCI, MIN_FPRS_PER_FMT): Return true for ISA_MIPS64R2.
+	(MIPS_ISA_LEVEL_SPEC, ASM_SPEC, LINK_SPEC): Handle -mips64r2.
+	(TARGET_LOONGSON_2E, TARGET_LOONGSON_2F, TARGET_LOONGSON_2EF):
+	Move up to keep list alphabetically sorted.
+	(TUNE_20KC, TUNE_24K, TUNE_74K, TUNE_LOONGSON_2EF): Likewise.
+	* config/mips/mips.c (mips_cpu_info_table): Add default MIPS64r2
+	processor.
+	* doc/invoke.texi (MIPS Options): Add -mips64r2.
+	(-march=@var{arch}): Add mips64r2.
+
 2008-07-31  H.J. Lu  <hongjiu.lu@intel.com>
 
 	* config/i386/darwin.h (MAIN_STACK_BOUNDARY): Define to 128.
diff --git a/gcc/config.gcc b/gcc/config.gcc
index bc818e6..a2aa424 100644
--- a/gcc/config.gcc
+++ b/gcc/config.gcc
@@ -1542,7 +1542,7 @@ mips*-*-netbsd*)			# NetBSD/mips, either endian.
 	target_cpu_default="MASK_ABICALLS"
 	tm_file="elfos.h ${tm_file} mips/elf.h netbsd.h netbsd-elf.h mips/netbsd.h"
 	;;
-mips64*-*-linux*)
+mips64*-*-linux* | mipsisa64*-*-linux*)
 	tm_file="dbxelf.h elfos.h svr4.h linux.h ${tm_file} mips/linux.h mips/linux64.h"
 	tmake_file="${tmake_file} mips/t-linux64"
 	tm_defines="${tm_defines} MIPS_ABI_DEFAULT=ABI_N32"
@@ -1551,6 +1551,9 @@ mips64*-*-linux*)
 			tm_file="${tm_file} mips/st.h"
 			tmake_file="${tmake_file} mips/t-st"
 			;;
+		mipsisa64r2*-*-linux*)
+			tm_defines="${tm_defines} MIPS_ISA_DEFAULT=65"
+			;;
 	esac
 	gnu_ld=yes
 	gas=yes
diff --git a/gcc/config/mips/mips.c b/gcc/config/mips/mips.c
index 913acc7..c4006c2 100644
--- a/gcc/config/mips/mips.c
+++ b/gcc/config/mips/mips.c
@@ -565,6 +565,8 @@ static const struct mips_cpu_info mips_cpu_info_table[] = {
   { "mips32", PROCESSOR_4KC, 32, PTF_AVOID_BRANCHLIKELY },
   { "mips32r2", PROCESSOR_M4K, 33, PTF_AVOID_BRANCHLIKELY },
   { "mips64", PROCESSOR_5KC, 64, PTF_AVOID_BRANCHLIKELY },
+  /* ??? For now just tune the generic MIPS64r2 for 5KC as well.   */
+  { "mips64r2", PROCESSOR_5KC, 65, PTF_AVOID_BRANCHLIKELY },
 
   /* MIPS I processors.  */
   { "r3000", PROCESSOR_R3000, 1, 0 },
diff --git a/gcc/config/mips/mips.h b/gcc/config/mips/mips.h
index 8518a86..f5fc2e6 100644
--- a/gcc/config/mips/mips.h
+++ b/gcc/config/mips/mips.h
@@ -204,7 +204,7 @@ enum mips_code_readable_setting {
 
 /* Generate mips16 code */
 #define TARGET_MIPS16		((target_flags & MASK_MIPS16) != 0)
-/* Generate mips16e code. Default 16bit ASE for mips32/mips32r2/mips64 */
+/* Generate mips16e code. Default 16bit ASE for mips32* and mips64* */
 #define GENERATE_MIPS16E	(TARGET_MIPS16 && mips_isa >= 32)
 /* Generate mips16e register save/restore sequences.  */
 #define GENERATE_MIPS16E_SAVE_RESTORE (GENERATE_MIPS16E && mips_abi == ABI_32)
@@ -227,8 +227,12 @@ enum mips_code_readable_setting {
 #define ISA_MIPS32		    (mips_isa == 32)
 #define ISA_MIPS32R2		    (mips_isa == 33)
 #define ISA_MIPS64                  (mips_isa == 64)
+#define ISA_MIPS64R2		    (mips_isa == 65)
 
 /* Architecture target defines.  */
+#define TARGET_LOONGSON_2E          (mips_arch == PROCESSOR_LOONGSON_2E)
+#define TARGET_LOONGSON_2F          (mips_arch == PROCESSOR_LOONGSON_2F)
+#define TARGET_LOONGSON_2EF         (TARGET_LOONGSON_2E || TARGET_LOONGSON_2F)
 #define TARGET_MIPS3900             (mips_arch == PROCESSOR_R3900)
 #define TARGET_MIPS4000             (mips_arch == PROCESSOR_R4000)
 #define TARGET_MIPS4120             (mips_arch == PROCESSOR_R4120)
@@ -240,11 +244,18 @@ enum mips_code_readable_setting {
 #define TARGET_SB1                  (mips_arch == PROCESSOR_SB1		\
 				     || mips_arch == PROCESSOR_SB1A)
 #define TARGET_SR71K                (mips_arch == PROCESSOR_SR71000)
-#define TARGET_LOONGSON_2E          (mips_arch == PROCESSOR_LOONGSON_2E)
-#define TARGET_LOONGSON_2F          (mips_arch == PROCESSOR_LOONGSON_2F)
-#define TARGET_LOONGSON_2EF         (TARGET_LOONGSON_2E || TARGET_LOONGSON_2F)
 
 /* Scheduling target defines.  */
+#define TUNE_20KC		    (mips_tune == PROCESSOR_20KC)
+#define TUNE_24K		    (mips_tune == PROCESSOR_24KC	\
+				     || mips_tune == PROCESSOR_24KF2_1	\
+				     || mips_tune == PROCESSOR_24KF1_1)
+#define TUNE_74K                    (mips_tune == PROCESSOR_74KC	\
+				     || mips_tune == PROCESSOR_74KF2_1	\
+				     || mips_tune == PROCESSOR_74KF1_1  \
+				     || mips_tune == PROCESSOR_74KF3_2)
+#define TUNE_LOONGSON_2EF           (mips_tune == PROCESSOR_LOONGSON_2E	\
+				     || mips_tune == PROCESSOR_LOONGSON_2F)
 #define TUNE_MIPS3000               (mips_tune == PROCESSOR_R3000)
 #define TUNE_MIPS3900               (mips_tune == PROCESSOR_R3900)
 #define TUNE_MIPS4000               (mips_tune == PROCESSOR_R4000)
@@ -258,16 +269,6 @@ enum mips_code_readable_setting {
 #define TUNE_MIPS9000               (mips_tune == PROCESSOR_R9000)
 #define TUNE_SB1                    (mips_tune == PROCESSOR_SB1		\
 				     || mips_tune == PROCESSOR_SB1A)
-#define TUNE_24K		    (mips_tune == PROCESSOR_24KC	\
-				     || mips_tune == PROCESSOR_24KF2_1	\
-				     || mips_tune == PROCESSOR_24KF1_1)
-#define TUNE_74K                    (mips_tune == PROCESSOR_74KC	\
-				     || mips_tune == PROCESSOR_74KF2_1	\
-				     || mips_tune == PROCESSOR_74KF1_1  \
-				     || mips_tune == PROCESSOR_74KF3_2)
-#define TUNE_20KC		    (mips_tune == PROCESSOR_20KC)
-#define TUNE_LOONGSON_2EF           (mips_tune == PROCESSOR_LOONGSON_2E	\
-				     || mips_tune == PROCESSOR_LOONGSON_2F)
 
 /* Whether vector modes and intrinsics for ST Microelectronics
    Loongson-2E/2F processors should be enabled.  In o32 pairs of
@@ -452,6 +453,12 @@ enum mips_code_readable_setting {
 	  builtin_define ("__mips_isa_rev=1");				\
 	  builtin_define ("_MIPS_ISA=_MIPS_ISA_MIPS64");		\
 	}								\
+      else if (ISA_MIPS64R2)						\
+	{								\
+	  builtin_define ("__mips=64");					\
+	  builtin_define ("__mips_isa_rev=2");				\
+	  builtin_define ("_MIPS_ISA=_MIPS_ISA_MIPS64");		\
+	}								\
 									\
       switch (mips_abi)							\
 	{								\
@@ -619,7 +626,11 @@ enum mips_code_readable_setting {
 #              if MIPS_ISA_DEFAULT == 64
 #                define MULTILIB_ISA_DEFAULT "mips64"
 #              else
-#                define MULTILIB_ISA_DEFAULT "mips1"
+#		 if MIPS_ISA_DEFAULT == 65
+#		   define MULTILIB_ISA_DEFAULT "mips64r2"
+#	         else
+#                  define MULTILIB_ISA_DEFAULT "mips1"
+#		 endif
 #              endif
 #            endif
 #          endif
@@ -670,6 +681,7 @@ enum mips_code_readable_setting {
      %{march=mips32r2|march=m4k|march=4ke*|march=4ksd|march=24k* \
        |march=34k*|march=74k*: -mips32r2} \
      %{march=mips64|march=5k*|march=20k*|march=sb1*|march=sr71000: -mips64} \
+     %{march=mips64r2: -mips64r2} \
      %{!march=*: -" MULTILIB_ISA_DEFAULT "}}"
 
 /* A spec that infers a -mhard-float or -msoft-float setting from an
@@ -726,7 +738,8 @@ enum mips_code_readable_setting {
 /* ISA has instructions for managing 64-bit fp and gp regs (e.g. mips3).  */
 #define ISA_HAS_64BIT_REGS	(ISA_MIPS3				\
 				 || ISA_MIPS4				\
-				 || ISA_MIPS64)
+				 || ISA_MIPS64				\
+				 || ISA_MIPS64R2)
 
 /* ISA has branch likely instructions (e.g. mips2).  */
 /* Disable branchlikely for tx39 until compare rewrite.  They haven't
@@ -742,7 +755,8 @@ enum mips_code_readable_setting {
 				  || TARGET_MAD				\
 				  || ISA_MIPS32				\
 				  || ISA_MIPS32R2			\
-				  || ISA_MIPS64)			\
+				  || ISA_MIPS64				\
+				  || ISA_MIPS64R2)			\
 				 && !TARGET_MIPS16)
 
 /* ISA has the floating-point conditional move instructions introduced
@@ -750,7 +764,8 @@ enum mips_code_readable_setting {
 #define ISA_HAS_FP_CONDMOVE	((ISA_MIPS4				\
 				  || ISA_MIPS32				\
 				  || ISA_MIPS32R2			\
-				  || ISA_MIPS64)			\
+				  || ISA_MIPS64				\
+				  || ISA_MIPS64R2)			\
 				 && !TARGET_MIPS5500			\
 				 && !TARGET_MIPS16)
 
@@ -766,18 +781,20 @@ enum mips_code_readable_setting {
 #define ISA_HAS_8CC		(ISA_MIPS4				\
 				 || ISA_MIPS32				\
 				 || ISA_MIPS32R2			\
-				 || ISA_MIPS64)
+				 || ISA_MIPS64				\
+				 || ISA_MIPS64R2)
 
 /* This is a catch all for other mips4 instructions: indexed load, the
    FP madd and msub instructions, and the FP recip and recip sqrt
    instructions.  */
 #define ISA_HAS_FP4		((ISA_MIPS4				\
 				  || (ISA_MIPS32R2 && TARGET_FLOAT64)   \
-				  || ISA_MIPS64)			\
+				  || ISA_MIPS64				\
+				  || ISA_MIPS64R2)			\
 				 && !TARGET_MIPS16)
 
 /* ISA has paired-single instructions.  */
-#define ISA_HAS_PAIRED_SINGLE	(ISA_MIPS32R2 || ISA_MIPS64)
+#define ISA_HAS_PAIRED_SINGLE	(ISA_MIPS32R2 || ISA_MIPS64 || ISA_MIPS64R2)
 
 /* ISA has conditional trap instructions.  */
 #define ISA_HAS_COND_TRAP	(!ISA_MIPS1				\
@@ -786,7 +803,8 @@ enum mips_code_readable_setting {
 /* ISA has integer multiply-accumulate instructions, madd and msub.  */
 #define ISA_HAS_MADD_MSUB	((ISA_MIPS32				\
 				  || ISA_MIPS32R2			\
-				  || ISA_MIPS64)			\
+				  || ISA_MIPS64				\
+				  || ISA_MIPS64R2)			\
 				 && !TARGET_MIPS16)
 
 /* Integer multiply-accumulate instructions should be generated.  */
@@ -803,7 +821,8 @@ enum mips_code_readable_setting {
 #define ISA_HAS_NMADD4_NMSUB4(MODE)					\
 				((ISA_MIPS4				\
 				  || (ISA_MIPS32R2 && (MODE) == V2SFmode) \
-				  || ISA_MIPS64)			\
+				  || ISA_MIPS64				\
+				  || ISA_MIPS64R2)			\
 				 && (!TARGET_MIPS5400 || TARGET_MAD)	\
 				 && !TARGET_MIPS16)
 
@@ -815,7 +834,8 @@ enum mips_code_readable_setting {
 /* ISA has count leading zeroes/ones instruction (not implemented).  */
 #define ISA_HAS_CLZ_CLO		((ISA_MIPS32				\
 				  || ISA_MIPS32R2			\
-				  || ISA_MIPS64)			\
+				  || ISA_MIPS64				\
+				  || ISA_MIPS64R2)			\
 				 && !TARGET_MIPS16)
 
 /* ISA has three operand multiply instructions that put
@@ -855,6 +875,7 @@ enum mips_code_readable_setting {
 
 /* ISA has the "ror" (rotate right) instructions.  */
 #define ISA_HAS_ROR		((ISA_MIPS32R2				\
+				  || ISA_MIPS64R2			\
 				  || TARGET_MIPS5400			\
 				  || TARGET_MIPS5500			\
 				  || TARGET_SR71K			\
@@ -865,7 +886,8 @@ enum mips_code_readable_setting {
 #define ISA_HAS_PREFETCH	((ISA_MIPS4				\
 				  || ISA_MIPS32				\
 				  || ISA_MIPS32R2			\
-				  || ISA_MIPS64)			\
+				  || ISA_MIPS64				\
+				  || ISA_MIPS64R2)			\
 				 && !TARGET_MIPS16)
 
 /* ISA has data indexed prefetch instructions.  This controls use of
@@ -874,7 +896,8 @@ enum mips_code_readable_setting {
    enabled.)  */
 #define ISA_HAS_PREFETCHX	((ISA_MIPS4				\
 				  || ISA_MIPS32R2			\
-				  || ISA_MIPS64)			\
+				  || ISA_MIPS64				\
+				  || ISA_MIPS64R2)			\
 				 && !TARGET_MIPS16)
 
 /* True if trunc.w.s and trunc.w.d are real (not synthetic)
@@ -883,15 +906,19 @@ enum mips_code_readable_setting {
 #define ISA_HAS_TRUNC_W		(!ISA_MIPS1)
 
 /* ISA includes the MIPS32r2 seb and seh instructions.  */
-#define ISA_HAS_SEB_SEH		(ISA_MIPS32R2				\
+#define ISA_HAS_SEB_SEH		((ISA_MIPS32R2		\
+				  || ISA_MIPS64R2)	\
 				 && !TARGET_MIPS16)
 
 /* ISA includes the MIPS32/64 rev 2 ext and ins instructions.  */
-#define ISA_HAS_EXT_INS		(ISA_MIPS32R2				\
+#define ISA_HAS_EXT_INS		((ISA_MIPS32R2		\
+				  || ISA_MIPS64R2)	\
 				 && !TARGET_MIPS16)
 
 /* ISA has instructions for accessing top part of 64-bit fp regs.  */
-#define ISA_HAS_MXHC1		(TARGET_FLOAT64 && ISA_MIPS32R2)
+#define ISA_HAS_MXHC1		(TARGET_FLOAT64		\
+				 && (ISA_MIPS32R2	\
+				     || ISA_MIPS64R2))
 
 /* ISA has lwxs instruction (load w/scaled index address.  */
 #define ISA_HAS_LWXS		(TARGET_SMARTMIPS && !TARGET_MIPS16)
@@ -932,11 +959,14 @@ enum mips_code_readable_setting {
 #define ISA_HAS_HILO_INTERLOCKS	(ISA_MIPS32				\
 				 || ISA_MIPS32R2			\
 				 || ISA_MIPS64				\
+				 || ISA_MIPS64R2			\
 				 || TARGET_MIPS5500			\
 				 || TARGET_LOONGSON_2EF)
 
 /* ISA includes synci, jr.hb and jalr.hb.  */
-#define ISA_HAS_SYNCI (ISA_MIPS32R2 && !TARGET_MIPS16)
+#define ISA_HAS_SYNCI ((ISA_MIPS32R2		\
+			|| ISA_MIPS64R2)	\
+		       && !TARGET_MIPS16)
 
 /* ISA includes sync.  */
 #define ISA_HAS_SYNC ((mips_isa >= 2 || TARGET_MIPS3900) && !TARGET_MIPS16)
@@ -1033,7 +1063,7 @@ enum mips_code_readable_setting {
 #undef ASM_SPEC
 #define ASM_SPEC "\
 %{G*} %(endian_spec) %{mips1} %{mips2} %{mips3} %{mips4} \
-%{mips32} %{mips32r2} %{mips64} \
+%{mips32*} %{mips64*} \
 %{mips16} %{mno-mips16:-no-mips16} \
 %{mips3d} %{mno-mips3d:-no-mips3d} \
 %{mdmx} %{mno-mdmx:-no-mdmx} \
@@ -1059,7 +1089,7 @@ enum mips_code_readable_setting {
 #ifndef LINK_SPEC
 #define LINK_SPEC "\
 %(endian_spec) \
-%{G*} %{mips1} %{mips2} %{mips3} %{mips4} %{mips32} %{mips32r2} %{mips64} \
+%{G*} %{mips1} %{mips2} %{mips3} %{mips4} %{mips32*} %{mips64*} \
 %{bestGnum} %{shared} %{non_shared}"
 #endif  /* LINK_SPEC defined */
 
@@ -1214,7 +1244,8 @@ enum mips_code_readable_setting {
 /* The number of consecutive floating-point registers needed to store the
    smallest format supported by the FPU.  */
 #define MIN_FPRS_PER_FMT \
-  (ISA_MIPS32 || ISA_MIPS32R2 || ISA_MIPS64 ? 1 : MAX_FPRS_PER_FMT) 
+  (ISA_MIPS32 || ISA_MIPS32R2 || ISA_MIPS64 || ISA_MIPS64R2 \
+   ? 1 : MAX_FPRS_PER_FMT)
 
 /* The largest size of value that can be held in floating-point
    registers and moved with a single instruction.  */
diff --git a/gcc/doc/invoke.texi b/gcc/doc/invoke.texi
index 33f0018..c2495b3 100644
--- a/gcc/doc/invoke.texi
+++ b/gcc/doc/invoke.texi
@@ -629,7 +629,8 @@ Objective-C and Objective-C++ Dialects}.
 
 @emph{MIPS Options}
 @gccoptlist{-EL  -EB  -march=@var{arch}  -mtune=@var{arch} @gol
--mips1  -mips2  -mips3  -mips4  -mips32  -mips32r2  -mips64 @gol
+-mips1  -mips2  -mips3  -mips4  -mips32  -mips32r2 @gol
+-mips64  -mips64r2 @gol
 -mips16  -mno-mips16  -mflip-mips16 @gol
 -minterlink-mips16  -mno-interlink-mips16 @gol
 -mabi=@var{abi}  -mabicalls  -mno-abicalls @gol
@@ -11963,7 +11964,7 @@ Generate code that will run on @var{arch}, which can be the name of a
 generic MIPS ISA, or the name of a particular processor.
 The ISA names are:
 @samp{mips1}, @samp{mips2}, @samp{mips3}, @samp{mips4},
-@samp{mips32}, @samp{mips32r2}, and @samp{mips64}.
+@samp{mips32}, @samp{mips32r2}, @samp{mips64} and @samp{mips64r2}.
 The processor names are:
 @samp{4kc}, @samp{4km}, @samp{4kp}, @samp{4ksc},
 @samp{4kec}, @samp{4kem}, @samp{4kep}, @samp{4ksd},
@@ -12065,6 +12066,10 @@ Equivalent to @samp{-march=mips32r2}.
 @opindex mips64
 Equivalent to @samp{-march=mips64}.
 
+@item -mips64r2
+@opindex mips64r2
+Equivalent to @samp{-march=mips64r2}.
+
 @item -mips16
 @itemx -mno-mips16
 @opindex mips16
diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index 6e460bc..6f9210d 100644
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,3 +1,7 @@
+2008-07-31  Adam Nemet  <anemet@caviumnetworks.com>
+
+	* gcc.target/mips/ext-1.c: New test.
+
 2008-07-31  Eric Botcazou  <ebotcazou@adacore.com>
 
 	* gnat.dg/discr10.ad[sb]: New test.
diff --git a/gcc/testsuite/gcc.target/mips/ext-1.c b/gcc/testsuite/gcc.target/mips/ext-1.c
new file mode 100644
index 0000000..1cd111d5
--- /dev/null
+++ b/gcc/testsuite/gcc.target/mips/ext-1.c
@@ -0,0 +1,18 @@
+/* { dg-do compile } */
+/* { dg-mips-options "-O -mips64r2" } */
+/* { dg-final { scan-assembler "\tdext\t" } } */
+/* { dg-final { scan-assembler-not "and" } } */
+
+struct
+{
+  unsigned long long a:9;
+  unsigned long long d:35;
+  unsigned long long e:10;
+  unsigned long long f:10;
+} t;
+
+NOMIPS16 unsigned long long
+f (void)
+{
+   return t.d;
+}