Revert "no dsp extensions"

This reverts commit 5e2ba8e5.

mipsevm/test/madd.asm

+###############################################################################
+# File         : madd.asm
+# Project      : MIPS32 MUX
+# Author:      : Grant Ayers (ayers@cs.stanford.edu)
+#
+# Standards/Formatting:
+#   MIPS gas, soft tab, 80 column
+#
+# Description:
+#   Test the functionality of the 'madd' instruction.
+#
+###############################################################################
+
+
+    .section .test, "x"
+    .balign 4
+    .set    noreorder
+    .global test
+    .ent    test
+test:
+    lui     $s0, 0xbfff         # Load the base address 0xbffffff0
+    ori     $s0, 0xfff0
+    ori     $s1, $0, 1          # Prepare the 'done' status
+
+    #### Test code start ####
+
+    lui     $t0, 0x1234         # Multiply A 0x12345678
+    ori     $t0, 0x5678
+    lui     $t1, 0xc001         # Multiply B 0xc001cafe
+    ori     $t1, 0xcafe
+    lui     $t2, 0x3141         # Fused sum 0x3141592631415926
+    ori     $t2, 0x5926
+    mthi    $t2
+    mtlo    $t2
+    madd    $t0, $t1            # 0x2cb4642be3e1d436
+    mfhi    $t3
+    mflo    $t4
+    lui     $t5, 0x2cb4
+    ori     $t5, 0x642b
+    lui     $t6, 0xe3e1
+    ori     $t6, 0xd436
+    subu    $t7, $t3, $t5
+    subu    $t8, $t4, $t6
+    sltiu   $v0, $t7, 1
+    sltiu   $v1, $t8, 1
+    and     $v0, $v0, $v1
+
+    #### Test code end ####
+
+    sw      $v0, 8($s0)         # Set the test result
+    sw      $s1, 4($s0)         # Set 'done'
+
+$done:
+    jr      $ra
+    nop
+
+    .end test

mipsevm/test/maddu.asm

+###############################################################################
+# File         : maddu.asm
+# Project      : MIPS32 MUX
+# Author:      : Grant Ayers (ayers@cs.stanford.edu)
+#
+# Standards/Formatting:
+#   MIPS gas, soft tab, 80 column
+#
+# Description:
+#   Test the functionality of the 'maddu' instruction.
+#
+###############################################################################
+
+
+    .section .test, "x"
+    .balign 4
+    .set    noreorder
+    .global test
+    .ent    test
+test:
+    lui     $s0, 0xbfff         # Load the base address 0xbffffff0
+    ori     $s0, 0xfff0
+    ori     $s1, $0, 1          # Prepare the 'done' status
+
+    #### Test code start ####
+
+    lui     $t0, 0x1234         # Multiply A 0x12345678
+    ori     $t0, 0x5678
+    lui     $t1, 0xc001         # Multiply B 0xc001cafe
+    ori     $t1, 0xcafe
+    lui     $t2, 0x3141         # Fused sum 0x3141592631415926
+    ori     $t2, 0x5926
+    mthi    $t2
+    mtlo    $t2
+    maddu   $t0, $t1            # 0x3ee8baa3e3e1d436
+    mfhi    $t3
+    mflo    $t4
+    lui     $t5, 0x3ee8
+    ori     $t5, 0xbaa3
+    lui     $t6, 0xe3e1
+    ori     $t6, 0xd436
+    subu    $t7, $t3, $t5
+    subu    $t8, $t4, $t6
+    sltiu   $v0, $t7, 1
+    sltiu   $v1, $t8, 1
+    and     $v0, $v0, $v1
+
+    #### Test code end ####
+
+    sw      $v0, 8($s0)         # Set the test result
+    sw      $s1, 4($s0)         # Set 'done'
+
+$done:
+    jr      $ra
+    nop
+
+    .end test

mipsevm/test/msub.asm

+###############################################################################
+# File         : msub.asm
+# Project      : MIPS32 MUX
+# Author:      : Grant Ayers (ayers@cs.stanford.edu)
+#
+# Standards/Formatting:
+#   MIPS gas, soft tab, 80 column
+#
+# Description:
+#   Test the functionality of the 'msub' instruction.
+#
+###############################################################################
+
+
+    .section .test, "x"
+    .balign 4
+    .set    noreorder
+    .global test
+    .ent    test
+test:
+    lui     $s0, 0xbfff         # Load the base address 0xbffffff0
+    ori     $s0, 0xfff0
+    ori     $s1, $0, 1          # Prepare the 'done' status
+
+    #### Test code start ####
+
+    lui     $t0, 0x1234         # Multiply A 0x12345678
+    ori     $t0, 0x5678
+    lui     $t1, 0xc001         # Multiply B 0xc001cafe
+    ori     $t1, 0xcafe
+    lui     $t2, 0x3141         # Fused sum 0x3141592631415926
+    ori     $t2, 0x5926
+    mthi    $t2
+    mtlo    $t2
+    msub    $t0, $t1            # 0x35ce4e207ea0de16
+    mfhi    $t3
+    mflo    $t4
+    lui     $t5, 0x35ce
+    ori     $t5, 0x4e20
+    lui     $t6, 0x7ea0
+    ori     $t6, 0xde16
+    subu    $t7, $t3, $t5
+    subu    $t8, $t4, $t6
+    sltiu   $v0, $t7, 1
+    sltiu   $v1, $t8, 1
+    and     $v0, $v0, $v1
+
+    #### Test code end ####
+
+    sw      $v0, 8($s0)         # Set the test result
+    sw      $s1, 4($s0)         # Set 'done'
+
+$done:
+    jr      $ra
+    nop
+
+    .end test

mipsevm/test/msubu.asm

+###############################################################################
+# File         : msubu.asm
+# Project      : MIPS32 MUX
+# Author:      : Grant Ayers (ayers@cs.stanford.edu)
+#
+# Standards/Formatting:
+#   MIPS gas, soft tab, 80 column
+#
+# Description:
+#   Test the functionality of the 'msubu' instruction.
+#
+###############################################################################
+
+    .section .test, "x"
+    .balign 4
+    .set    noreorder
+    .global test
+    .ent    test
+test:
+    lui     $s0, 0xbfff         # Load the base address 0xbffffff0
+    ori     $s0, 0xfff0
+    ori     $s1, $0, 1          # Prepare the 'done' status
+
+    #### Test code start ####
+
+    lui     $t0, 0x1234         # Multiply A 0x12345678
+    ori     $t0, 0x5678
+    lui     $t1, 0xc001         # Multiply B 0xc001cafe
+    ori     $t1, 0xcafe
+    lui     $t2, 0x3141         # Fused sum 0x3141592631415926
+    ori     $t2, 0x5926
+    mthi    $t2
+    mtlo    $t2
+    msubu   $t0, $t1            # 0x2399f7a87ea0de16
+    mfhi    $t3
+    mflo    $t4
+    lui     $t5, 0x2399
+    ori     $t5, 0xf7a8
+    lui     $t6, 0x7ea0
+    ori     $t6, 0xde16
+    subu    $t7, $t3, $t5
+    subu    $t8, $t4, $t6
+    sltiu   $v0, $t7, 1
+    sltiu   $v1, $t8, 1
+    and     $v0, $v0, $v1
+
+    #### Test code end ####
+
+    sw      $v0, 8($s0)         # Set the test result
+    sw      $s1, 4($s0)         # Set 'done'
+
+$done:
+    jr      $ra
+    nop
+
+    .end test