[x264-devel] [PATCH] Updated configure to detect MIPS platform and set flags. Added define for MIPS MSA. MSA is SIMD architecture of MIPS. Flags are added to enable MSA.

[Parag Salasakar]

---
 configure | 46 ++++++++++++++++++++++++++++++++++++++++++++++
 x264.h    |  3 +++
 2 files changed, 49 insertions(+)

diff --git a/configure b/configure
index 15b1c91..1999ad6 100755
--- a/configure
+++ b/configure
@@ -735,6 +735,7 @@ case $host_cpu in
         ;;
     mips|mipsel|mips64|mips64el)
         ARCH="MIPS"
+        AS="${AS-${cross_prefix}gcc}"
         ;;
     arm*)
         ARCH="ARM"
@@ -860,6 +861,51 @@ if [ $asm = auto -a \( $ARCH = ARM -o $ARCH = AARCH64 \) ] ; then
     as_check ".func test${NL}.endfunc" && define HAVE_AS_FUNC 1
 fi
 
+if [ $asm = auto -a $ARCH = MIPS ] ; then
+    # set flags so msa is built by default
+    echo $CFLAGS | grep -Eq '(-mcpu|-march|-arch)' || CFLAGS="$CFLAGS -mfp64 -mmsa -flax-vector-conversions"
+
+    if cc_check '' '' '__asm__("move.v $w5, $w11");' ; then define HAVE_MSA
+        CFLAGS="$CFLAGS -msched-weight -funroll-loops -mload-store-pairs"
+        LDFLAGS="$LDFLAGS -mmsa -mfp64"
+
+        if cc_check '' '' '__asm__("ulw  $6,  4($9)");' ; then
+            case $host_cpu in
+                mips|mipsel)
+                    CFLAGS="$CFLAGS -mips32r5 -mtune=p5600"
+                    ASFLAGS="$ASFLAGS -mips32r5 -mtune=p5600"
+                    LDFLAGS="$LDFLAGS -mips32r5 -mtune=p5600"
+                   ;;
+                mips64|mips64el)
+                    CFLAGS="$CFLAGS -mips64r5 -mabi=64"
+                    ASFLAGS="$ASFLAGS -mips64r5 -mabi=64"
+                    LDFLAGS="$LDFLAGS -mips64r5 -mabi=64"
+                    ;;
+            esac
+        else
+            case $host_cpu in
+                mips|mipsel)
+                    CFLAGS="$CFLAGS -mips32r6"
+                    ASFLAGS="$ASFLAGS -mips32r6"
+                    LDFLAGS="$LDFLAGS -mips32r6"
+                    ;;
+                mips64|mips64el)
+                    CFLAGS="$CFLAGS -mips64r6 -mabi=64 -mtune=i6400"
+                    ASFLAGS="$ASFLAGS -mips64r6 -mabi=64 -mtune=i6400"
+                    LDFLAGS="$LDFLAGS -mips64r6 -mabi=64 -mtune=i6400"
+                    ;;
+            esac
+        fi
+    else
+        CFLAGS="$CFLAGS -mips32r2"
+    fi
+
+    if cc_check '' '' '__asm__("madd.d $f0, $f2, $f4, $f6");' ; then
+        CFLAGS="$CFLAGS -mhard-float"
+        ASFLAGS="$ASFLAGS -mhard-float"
+    fi
+fi
+
 [ $asm = no ] && AS=""
 [ "x$AS" = x ] && asm="no" || asm="yes"
 
diff --git a/x264.h b/x264.h
index 7cc5fcc..8194246 100644
--- a/x264.h
+++ b/x264.h
@@ -158,6 +158,9 @@ typedef struct
 #define X264_CPU_FAST_NEON_MRC   0x0000004  /* Transfer from NEON to ARM register is fast (Cortex-A9) */
 #define X264_CPU_ARMV8           0x0000008
 
+/* MIPS */
+#define X264_CPU_MSA             0x0000001  /* MIPS MSA */
+
 /* Analyse flags */
 #define X264_ANALYSE_I4x4       0x0001  /* Analyse i4x4 */
 #define X264_ANALYSE_I8x8       0x0002  /* Analyse i8x8 (requires 8x8 transform) */
-- 
2.3.2