Bug 603890 add --endianness to lirasm, make tests endianness aware r=nnethercote

--HG--
extra : convert_revision : c7cd544f32aae57d3d359756db867bb33dd83e73

js/src/lirasm/lirasm.cpp

@@ -2235,6 +2235,7 @@ usageAndQuit(const string& progname)
         "  --[no-]optimize  enable or disable optimization of the LIR (default=off)\n"
         "  --random [N]     generate a random LIR block of size N (default=1000)\n"
         "  --word-size      prints the word size (32 or 64) for this build of lirasm and exits\n"
+        "  --endianness     prints endianness (little-endian or big-endian) for this build of librasm and exits\n"
         " i386-specific options:\n"
         "  --sse            use SSE2 instructions\n"
         " ARM-specific options:\n"
@@ -2313,6 +2314,15 @@ processCmdLine(int argc, char **argv, CmdLineOptions& opts)
             cout << sizeof(void*) * 8 << "\n";
             exit(0);
         }
+        else if (arg == "--endianness") {
+            int32_t x = 0x01020304;
+            if (*(char*)&x == 0x1) {
+              cout << "big-endian" << "\n";
+            } else {
+              cout << "little-endian" << "\n";
+            }
+            exit(0);
+        }
 
         // Architecture-specific flags.
 #if defined NANOJIT_IA32

js/src/lirasm/testlirc.sh

@@ -77,6 +77,24 @@ then
     done
 fi
 
+# little endian
+if [[ $($LIRASM --endianness 2>/dev/null) != "big-endian" ]]
+then
+    for infile in "$TESTS_DIR"/littleendian/*.in
+    do
+        runtest $infile
+    done
+fi
+
+# big endian
+if [[ $($LIRASM --endianness 2>/dev/null) == "big-endian" ]]
+then
+    for infile in "$TESTS_DIR"/bigendian/*.in
+    do
+        runtest $infile
+    done
+fi
+
 # ARM
 if [[ $(uname -m) == arm* ]]
 then

js/src/lirasm/tests/littleendian/fuzz-527178.in

@@ -0,0 +1,5 @@
+base = allocp 512
+five = immi 5
+sti five base 256
+x = ldus2ui base 256
+reti x

js/src/lirasm/tests/littleendian/fuzz-527178.out

@@ -0,0 +1 @@
+Output is: 5

js/src/lirasm/tests/littleendian/ldc2i.in

@@ -0,0 +1,26 @@
+full = immi 1288908529 ; 0x4cd32ef1
+p = allocp 4
+sti full p 0
+
+n0chk = immi -15 ; sign_extend(0xf1)
+n1chk = immi  46 ; sign_extend(0x2e)
+n2chk = immi -45 ; sign_extend(0xd3)
+n3chk = immi  76 ; sign_extend(0x4c)
+
+n0 = ldc2i p 0
+n1 = ldc2i p 1
+n2 = ldc2i p 2
+n3 = ldc2i p 3
+
+; Collate the results.
+r0 = xori n0chk n0
+r1 = xori n1chk n1
+r2 = xori n2chk n2
+r3 = xori n3chk n3
+
+r0_1 = ori r0 r1
+r2_3 = ori r2 r3
+
+r = ori r0_1 r2_3
+reti r
+

js/src/lirasm/tests/littleendian/ldc2i.out

@@ -0,0 +1 @@
+Output is: 0

js/src/lirasm/tests/littleendian/lds2i.in

@@ -0,0 +1,17 @@
+full = immi -249334698 ; 0xf1237456
+p = allocp 4
+sti full p 0
+
+n0chk = immi 29782 ; sign_extend(0x7456)
+n1chk = immi -3805 ; sign_extend(0xf123)
+
+n0 = lds2i p 0
+n1 = lds2i p 2
+
+; Collate the results.
+r0 = xori n0chk n0
+r1 = xori n1chk n1
+
+r = ori r0 r1
+reti r
+

js/src/lirasm/tests/littleendian/lds2i.out

@@ -0,0 +1 @@
+Output is: 0

js/src/lirasm/tests/littleendian/lduc2ui.in

@@ -0,0 +1,26 @@
+full = immi -992746767 ; 0xc4d3e2f1
+p = allocp 4
+sti full p 0
+
+n0chk = immi 241 ; 0xf1
+n1chk = immi 226 ; 0xe2
+n2chk = immi 211 ; 0xd3
+n3chk = immi 196 ; 0xc4
+
+n0 = lduc2ui p 0
+n1 = lduc2ui p 1
+n2 = lduc2ui p 2
+n3 = lduc2ui p 3
+
+; Collate the results.
+r0 = xori n0chk n0
+r1 = xori n1chk n1
+r2 = xori n2chk n2
+r3 = xori n3chk n3
+
+r0_1 = ori r0 r1
+r2_3 = ori r2 r3
+
+r = ori r0_1 r2_3
+reti r
+

js/src/lirasm/tests/littleendian/lduc2ui.out

@@ -0,0 +1 @@
+Output is: 0

js/src/lirasm/tests/littleendian/ldus2ui.in

@@ -0,0 +1,17 @@
+full = immi -249334698 ; 0xf1237456
+p = allocp 4
+sti full p 0
+
+n0chk = immi 29782 ; sign_extend(0x7456)
+n1chk = immi 61731 ; sign_extend(0xf123)
+
+n0 = ldus2ui p 0
+n1 = ldus2ui p 2
+
+; Collate the results.
+r0 = xori n0chk n0
+r1 = xori n1chk n1
+
+r = ori r0 r1
+reti r
+

js/src/lirasm/tests/littleendian/ldus2ui.out

@@ -0,0 +1 @@
+Output is: 0