configure: add support for mips32r5, p5600 cpu and msa

Imagination Technologies has come up with MIPS Warrior Processor Cores.
More details can be found at-
http://www.imgtec.com/mips/warrior/pclass.asp
http://www.imgtec.com/mips/warrior/iclass.asp

This is a preparation patch to submit optimized code for MSA (MIPS-SIMD-Architecture)
This patch set is adding support for P5600 and I6400 CPUs.

MIPS 'generic' case is added, with mips32r2 arch as default (fpu and dsp opt enabled).

Sample configurations for new MSA architectures-
    $ ./configure --enable-cross-compile --cross-prefix=<PATH> --arch=mips --target-os=linux --cpu=p5600
    $ ./configure --enable-cross-compile --cross-prefix=<PATH> --arch=mips --target-os=linux --cpu=i6400
Signed-off-by: Shivraj Patil <shivraj.patil@imgtec.com>
Reviewed-by: Nedeljko Babic <Nedeljko.Babic@imgtec.com>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

configure

@@ -360,8 +360,10 @@ Optimization options (experts only):
   --disable-neon           disable NEON optimizations
   --disable-inline-asm     disable use of inline assembly
   --disable-yasm           disable use of nasm/yasm assembly
+  --disable-mips32r5       disable MIPS32R5 optimizations
   --disable-mipsdspr1      disable MIPS DSP ASE R1 optimizations
   --disable-mipsdspr2      disable MIPS DSP ASE R2 optimizations
+  --disable-msa            disable MSA optimizations
   --disable-mipsfpu        disable floating point MIPS optimizations
   --disable-fast-unaligned consider unaligned accesses slow
 
@@ -1565,8 +1567,10 @@ ARCH_EXT_LIST_ARM="
 ARCH_EXT_LIST_MIPS="
     mipsfpu
     mips32r2
+    mips32r5
     mipsdspr1
     mipsdspr2
+    msa
 "
 
 ARCH_EXT_LIST_X86_SIMD="
@@ -2009,6 +2013,8 @@ map 'eval ${v}_inline_deps=inline_asm' $ARCH_EXT_LIST_ARM
 mipsfpu_deps="mips"
 mipsdspr1_deps="mips"
 mipsdspr2_deps="mips"
+mips32r5_deps="mips"
+msa_deps="mips"
 
 altivec_deps="ppc"
 ppc4xx_deps="ppc"
@@ -3842,23 +3848,43 @@ elif enabled mips; then
 
     case $cpu in
         24kc)
+            disable mips32r5
             disable mipsfpu
             disable mipsdspr1
             disable mipsdspr2
+            disable msa
         ;;
         24kf*)
+            disable mips32r5
             disable mipsdspr1
             disable mipsdspr2
+            disable msa
         ;;
         24kec|34kc|1004kc)
+            disable mips32r5
             disable mipsfpu
             disable mipsdspr2
+            disable msa
         ;;
         24kef*|34kf*|1004kf*)
+            disable mips32r5
             disable mipsdspr2
+            disable msa
         ;;
         74kc)
+            disable mips32r5
             disable mipsfpu
+            disable msa
+        ;;
+        p5600)
+            disable mipsdspr1
+            disable mipsdspr2
+
+            check_cflags "-mtune=p5600"
+        ;;
+        generic)
+            disable mips32r5
+            disable msa
         ;;
     esac
 
@@ -4613,17 +4639,28 @@ elif enabled mips; then
     elif enabled mips64 && enabled mipsfpu; then
         add_cflags "-mips64"
         add_asflags "-mips64"
-    elif enabled mipsfpu || enabled mipsdspr1 || enabled mipsdspr2; then
-        add_cflags "-mips32r2"
-        add_asflags "-mips32r2"
+    elif enabled mipsdspr1 || enabled mipsdspr2; then
+        add_cflags "-mips32r2 -mfp32"
+        add_asflags "-mips32r2 -mfp32"
+    elif enabled mips32r5; then
+        check_cflags "-mfp64"
+        check_ldflags "-mfp64"
     fi
 
+    enabled mips32r5  && check_cflags "-mips32r5 -msched-weight -mload-store-pairs -funroll-loops" &&
+     check_ldflags "-mips32r5" &&
+     check_inline_asm mips32r5  '"ulw $t0, ($t1)"'
     enabled mipsdspr1 && add_cflags "-mdsp" && add_asflags "-mdsp" &&
      check_inline_asm mipsdspr1 '"addu.qb $t0, $t1, $t2"'
     enabled mipsdspr2 && add_cflags "-mdspr2" && add_asflags "-mdspr2" &&
      check_inline_asm mipsdspr2 '"absq_s.qb $t0, $t1"'
     enabled mipsfpu   && add_cflags "-mhard-float" && add_asflags "-mhard-float" &&
      check_inline_asm mipsfpu   '"madd.d $f0, $f2, $f4, $f6"'
+    enabled msa       && check_cflags "-mmsa" && check_ldflags "-mmsa" &&
+     check_inline_asm msa       '"addvi.b $w0, $w1, 1"'
+
+    enabled mips32r5 && add_asflags "-mips32r5 -mfp64"
+    enabled msa && add_asflags "-mmsa"
 
 elif enabled parisc; then
 
@@ -5583,8 +5620,10 @@ if enabled arm; then
 fi
 if enabled mips; then
     echo "MIPS FPU enabled          ${mipsfpu-no}"
+    echo "MIPS32R5 enabled          ${mips32r5-no}"
     echo "MIPS DSP R1 enabled       ${mipsdspr1-no}"
     echo "MIPS DSP R2 enabled       ${mipsdspr2-no}"
+    echo "MIPS MSA enabled          ${msa-no}"
 fi
 if enabled ppc; then
     echo "AltiVec enabled           ${altivec-no}"