S390: Optimize decoding opcode format by using format table

src/s390/constants-s390.cc

Index: src/s390/constants-s390.cc
diff --git a/src/s390/constants-s390.cc b/src/s390/constants-s390.cc
index a958082a8ff5597c9082322e5b1b2866450ac4a1..da53613bc7bbeef5749ee9d5bbedeaa9a682433d 100644
--- a/src/s390/constants-s390.cc
+++ b/src/s390/constants-s390.cc
@@ -9,6 +9,267 @@
 namespace v8 {
 namespace internal {
 
+Instruction::OpcodeFormatType Instruction::OpcodeFormatTable[] = {
+    // Based on Figure B-3 in z/Architecture Principles of
+    // Operation.
+    TWO_BYTE_OPCODE,           // 0x00
+    TWO_BYTE_OPCODE,           // 0x01
+    TWO_BYTE_DISJOINT_OPCODE,  // 0x02
+    TWO_BYTE_DISJOINT_OPCODE,  // 0x03
+    ONE_BYTE_OPCODE,           // 0x04
+    ONE_BYTE_OPCODE,           // 0x05
+    ONE_BYTE_OPCODE,           // 0x06
+    ONE_BYTE_OPCODE,           // 0x07
+    ONE_BYTE_OPCODE,           // 0x08
+    ONE_BYTE_OPCODE,           // 0x09
+    ONE_BYTE_OPCODE,           // 0x0a
+    ONE_BYTE_OPCODE,           // 0x0b
+    ONE_BYTE_OPCODE,           // 0x0c
+    ONE_BYTE_OPCODE,           // 0x0d
+    ONE_BYTE_OPCODE,           // 0x0e
+    ONE_BYTE_OPCODE,           // 0x0f
+    ONE_BYTE_OPCODE,           // 0x10
+    ONE_BYTE_OPCODE,           // 0x11
+    ONE_BYTE_OPCODE,           // 0x12
+    ONE_BYTE_OPCODE,           // 0x13
+    ONE_BYTE_OPCODE,           // 0x14
+    ONE_BYTE_OPCODE,           // 0x15
+    ONE_BYTE_OPCODE,           // 0x16
+    ONE_BYTE_OPCODE,           // 0x17
+    ONE_BYTE_OPCODE,           // 0x18
+    ONE_BYTE_OPCODE,           // 0x19
+    ONE_BYTE_OPCODE,           // 0x1a
+    ONE_BYTE_OPCODE,           // 0x1b
+    ONE_BYTE_OPCODE,           // 0x1c
+    ONE_BYTE_OPCODE,           // 0x1d
+    ONE_BYTE_OPCODE,           // 0x1e
+    ONE_BYTE_OPCODE,           // 0x1f
+    ONE_BYTE_OPCODE,           // 0x20
+    ONE_BYTE_OPCODE,           // 0x21
+    ONE_BYTE_OPCODE,           // 0x22
+    ONE_BYTE_OPCODE,           // 0x23
+    ONE_BYTE_OPCODE,           // 0x24
+    ONE_BYTE_OPCODE,           // 0x25
+    ONE_BYTE_OPCODE,           // 0x26
+    ONE_BYTE_OPCODE,           // 0x27
+    ONE_BYTE_OPCODE,           // 0x28
+    ONE_BYTE_OPCODE,           // 0x29
+    ONE_BYTE_OPCODE,           // 0x2a
+    ONE_BYTE_OPCODE,           // 0x2b
+    ONE_BYTE_OPCODE,           // 0x2c
+    ONE_BYTE_OPCODE,           // 0x2d
+    ONE_BYTE_OPCODE,           // 0x2e
+    ONE_BYTE_OPCODE,           // 0x2f
+    ONE_BYTE_OPCODE,           // 0x30
+    ONE_BYTE_OPCODE,           // 0x31
+    ONE_BYTE_OPCODE,           // 0x32
+    ONE_BYTE_OPCODE,           // 0x33
+    ONE_BYTE_OPCODE,           // 0x34
+    ONE_BYTE_OPCODE,           // 0x35
+    ONE_BYTE_OPCODE,           // 0x36
+    ONE_BYTE_OPCODE,           // 0x37
+    ONE_BYTE_OPCODE,           // 0x38
+    ONE_BYTE_OPCODE,           // 0x39
+    ONE_BYTE_OPCODE,           // 0x3a
+    ONE_BYTE_OPCODE,           // 0x3b
+    ONE_BYTE_OPCODE,           // 0x3c
+    ONE_BYTE_OPCODE,           // 0x3d
+    ONE_BYTE_OPCODE,           // 0x3e
+    ONE_BYTE_OPCODE,           // 0x3f
+    ONE_BYTE_OPCODE,           // 0x40
+    ONE_BYTE_OPCODE,           // 0x41
+    ONE_BYTE_OPCODE,           // 0x42
+    ONE_BYTE_OPCODE,           // 0x43
+    ONE_BYTE_OPCODE,           // 0x44
+    ONE_BYTE_OPCODE,           // 0x45
+    ONE_BYTE_OPCODE,           // 0x46
+    ONE_BYTE_OPCODE,           // 0x47
+    ONE_BYTE_OPCODE,           // 0x48
+    ONE_BYTE_OPCODE,           // 0x49
+    ONE_BYTE_OPCODE,           // 0x4a
+    ONE_BYTE_OPCODE,           // 0x4b
+    ONE_BYTE_OPCODE,           // 0x4c
+    ONE_BYTE_OPCODE,           // 0x4d
+    ONE_BYTE_OPCODE,           // 0x4e
+    ONE_BYTE_OPCODE,           // 0x4f
+    ONE_BYTE_OPCODE,           // 0x50
+    ONE_BYTE_OPCODE,           // 0x51
+    ONE_BYTE_OPCODE,           // 0x52
+    ONE_BYTE_OPCODE,           // 0x53
+    ONE_BYTE_OPCODE,           // 0x54
+    ONE_BYTE_OPCODE,           // 0x55
+    ONE_BYTE_OPCODE,           // 0x56
+    ONE_BYTE_OPCODE,           // 0x57
+    ONE_BYTE_OPCODE,           // 0x58
+    ONE_BYTE_OPCODE,           // 0x59
+    ONE_BYTE_OPCODE,           // 0x5a
+    ONE_BYTE_OPCODE,           // 0x5b
+    ONE_BYTE_OPCODE,           // 0x5c
+    ONE_BYTE_OPCODE,           // 0x5d
+    ONE_BYTE_OPCODE,           // 0x5e
+    ONE_BYTE_OPCODE,           // 0x5f
+    ONE_BYTE_OPCODE,           // 0x60
+    ONE_BYTE_OPCODE,           // 0x61
+    ONE_BYTE_OPCODE,           // 0x62
+    ONE_BYTE_OPCODE,           // 0x63
+    ONE_BYTE_OPCODE,           // 0x64
+    ONE_BYTE_OPCODE,           // 0x65
+    ONE_BYTE_OPCODE,           // 0x66
+    ONE_BYTE_OPCODE,           // 0x67
+    ONE_BYTE_OPCODE,           // 0x68
+    ONE_BYTE_OPCODE,           // 0x69
+    ONE_BYTE_OPCODE,           // 0x6a
+    ONE_BYTE_OPCODE,           // 0x6b
+    ONE_BYTE_OPCODE,           // 0x6c
+    ONE_BYTE_OPCODE,           // 0x6d
+    ONE_BYTE_OPCODE,           // 0x6e
+    ONE_BYTE_OPCODE,           // 0x6f
+    ONE_BYTE_OPCODE,           // 0x70
+    ONE_BYTE_OPCODE,           // 0x71
+    ONE_BYTE_OPCODE,           // 0x72
+    ONE_BYTE_OPCODE,           // 0x73
+    ONE_BYTE_OPCODE,           // 0x74
+    ONE_BYTE_OPCODE,           // 0x75
+    ONE_BYTE_OPCODE,           // 0x76
+    ONE_BYTE_OPCODE,           // 0x77
+    ONE_BYTE_OPCODE,           // 0x78
+    ONE_BYTE_OPCODE,           // 0x79
+    ONE_BYTE_OPCODE,           // 0x7a
+    ONE_BYTE_OPCODE,           // 0x7b
+    ONE_BYTE_OPCODE,           // 0x7c
+    ONE_BYTE_OPCODE,           // 0x7d
+    ONE_BYTE_OPCODE,           // 0x7e
+    ONE_BYTE_OPCODE,           // 0x7f
+    ONE_BYTE_OPCODE,           // 0x80
+    ONE_BYTE_OPCODE,           // 0x81
+    ONE_BYTE_OPCODE,           // 0x82
+    ONE_BYTE_OPCODE,           // 0x83
+    ONE_BYTE_OPCODE,           // 0x84
+    ONE_BYTE_OPCODE,           // 0x85
+    ONE_BYTE_OPCODE,           // 0x86
+    ONE_BYTE_OPCODE,           // 0x87
+    ONE_BYTE_OPCODE,           // 0x88
+    ONE_BYTE_OPCODE,           // 0x89
+    ONE_BYTE_OPCODE,           // 0x8a
+    ONE_BYTE_OPCODE,           // 0x8b
+    ONE_BYTE_OPCODE,           // 0x8c
+    ONE_BYTE_OPCODE,           // 0x8d
+    ONE_BYTE_OPCODE,           // 0x8e
+    ONE_BYTE_OPCODE,           // 0x8f
+    ONE_BYTE_OPCODE,           // 0x90
+    ONE_BYTE_OPCODE,           // 0x91
+    ONE_BYTE_OPCODE,           // 0x92
+    ONE_BYTE_OPCODE,           // 0x93
+    ONE_BYTE_OPCODE,           // 0x94
+    ONE_BYTE_OPCODE,           // 0x95
+    ONE_BYTE_OPCODE,           // 0x96
+    ONE_BYTE_OPCODE,           // 0x97
+    ONE_BYTE_OPCODE,           // 0x98
+    ONE_BYTE_OPCODE,           // 0x99
+    ONE_BYTE_OPCODE,           // 0x9a
+    ONE_BYTE_OPCODE,           // 0x9b
+    TWO_BYTE_DISJOINT_OPCODE,  // 0x9c
+    TWO_BYTE_DISJOINT_OPCODE,  // 0x9d
+    TWO_BYTE_DISJOINT_OPCODE,  // 0x9e
+    TWO_BYTE_DISJOINT_OPCODE,  // 0x9f
+    TWO_BYTE_DISJOINT_OPCODE,  // 0xa0
+    TWO_BYTE_DISJOINT_OPCODE,  // 0xa1
+    TWO_BYTE_DISJOINT_OPCODE,  // 0xa2
+    TWO_BYTE_DISJOINT_OPCODE,  // 0xa3
+    TWO_BYTE_DISJOINT_OPCODE,  // 0xa4
+    THREE_NIBBLE_OPCODE,       // 0xa5
+    TWO_BYTE_DISJOINT_OPCODE,  // 0xa6
+    THREE_NIBBLE_OPCODE,       // 0xa7
+    ONE_BYTE_OPCODE,           // 0xa8
+    ONE_BYTE_OPCODE,           // 0xa9
+    ONE_BYTE_OPCODE,           // 0xaa
+    ONE_BYTE_OPCODE,           // 0xab
+    ONE_BYTE_OPCODE,           // 0xac
+    ONE_BYTE_OPCODE,           // 0xad
+    ONE_BYTE_OPCODE,           // 0xae
+    ONE_BYTE_OPCODE,           // 0xaf
+    ONE_BYTE_OPCODE,           // 0xb0
+    ONE_BYTE_OPCODE,           // 0xb1
+    TWO_BYTE_OPCODE,           // 0xb2
+    TWO_BYTE_OPCODE,           // 0xb3
+    TWO_BYTE_DISJOINT_OPCODE,  // 0xb4
+    TWO_BYTE_DISJOINT_OPCODE,  // 0xb5
+    TWO_BYTE_DISJOINT_OPCODE,  // 0xb6
+    TWO_BYTE_DISJOINT_OPCODE,  // 0xb7
+    TWO_BYTE_DISJOINT_OPCODE,  // 0xb8
+    TWO_BYTE_OPCODE,           // 0xb9
+    ONE_BYTE_OPCODE,           // 0xba
+    ONE_BYTE_OPCODE,           // 0xbb
+    ONE_BYTE_OPCODE,           // 0xbc
+    ONE_BYTE_OPCODE,           // 0xbd
+    ONE_BYTE_OPCODE,           // 0xbe
+    ONE_BYTE_OPCODE,           // 0xbf
+    THREE_NIBBLE_OPCODE,       // 0xc0
+    THREE_NIBBLE_OPCODE,       // 0xc1
+    THREE_NIBBLE_OPCODE,       // 0xc2
+    THREE_NIBBLE_OPCODE,       // 0xc3
+    THREE_NIBBLE_OPCODE,       // 0xc4
+    THREE_NIBBLE_OPCODE,       // 0xc5
+    THREE_NIBBLE_OPCODE,       // 0xc6
+    ONE_BYTE_OPCODE,           // 0xc7
+    THREE_NIBBLE_OPCODE,       // 0xc8
+    THREE_NIBBLE_OPCODE,       // 0xc9
+    THREE_NIBBLE_OPCODE,       // 0xca
+    THREE_NIBBLE_OPCODE,       // 0xcb
+    THREE_NIBBLE_OPCODE,       // 0xcc
+    TWO_BYTE_DISJOINT_OPCODE,  // 0xcd
+    TWO_BYTE_DISJOINT_OPCODE,  // 0xce
+    TWO_BYTE_DISJOINT_OPCODE,  // 0xcf
+    ONE_BYTE_OPCODE,           // 0xd0
+    ONE_BYTE_OPCODE,           // 0xd1
+    ONE_BYTE_OPCODE,           // 0xd2
+    ONE_BYTE_OPCODE,           // 0xd3
+    ONE_BYTE_OPCODE,           // 0xd4
+    ONE_BYTE_OPCODE,           // 0xd5
+    ONE_BYTE_OPCODE,           // 0xd6
+    ONE_BYTE_OPCODE,           // 0xd7
+    ONE_BYTE_OPCODE,           // 0xd8
+    ONE_BYTE_OPCODE,           // 0xd9
+    ONE_BYTE_OPCODE,           // 0xda
+    ONE_BYTE_OPCODE,           // 0xdb
+    ONE_BYTE_OPCODE,           // 0xdc
+    ONE_BYTE_OPCODE,           // 0xdd
+    ONE_BYTE_OPCODE,           // 0xde
+    ONE_BYTE_OPCODE,           // 0xdf
+    ONE_BYTE_OPCODE,           // 0xe0
+    ONE_BYTE_OPCODE,           // 0xe1
+    ONE_BYTE_OPCODE,           // 0xe2
+    TWO_BYTE_DISJOINT_OPCODE,  // 0xe3
+    TWO_BYTE_DISJOINT_OPCODE,  // 0xe4
+    TWO_BYTE_OPCODE,           // 0xe5
+    TWO_BYTE_DISJOINT_OPCODE,  // 0xe6
+    TWO_BYTE_DISJOINT_OPCODE,  // 0xe7
+    ONE_BYTE_OPCODE,           // 0xe8
+    ONE_BYTE_OPCODE,           // 0xe9
+    ONE_BYTE_OPCODE,           // 0xea
+    TWO_BYTE_DISJOINT_OPCODE,  // 0xeb
+    TWO_BYTE_DISJOINT_OPCODE,  // 0xec
+    TWO_BYTE_DISJOINT_OPCODE,  // 0xed
+    ONE_BYTE_OPCODE,           // 0xee
+    ONE_BYTE_OPCODE,           // 0xef
+    ONE_BYTE_OPCODE,           // 0xf0
+    ONE_BYTE_OPCODE,           // 0xf1
+    ONE_BYTE_OPCODE,           // 0xf2
+    ONE_BYTE_OPCODE,           // 0xf3
+    ONE_BYTE_OPCODE,           // 0xf4
+    ONE_BYTE_OPCODE,           // 0xf5
+    ONE_BYTE_OPCODE,           // 0xf6
+    ONE_BYTE_OPCODE,           // 0xf7
+    ONE_BYTE_OPCODE,           // 0xf8
+    ONE_BYTE_OPCODE,           // 0xf9
+    ONE_BYTE_OPCODE,           // 0xfa
+    ONE_BYTE_OPCODE,           // 0xfb
+    ONE_BYTE_OPCODE,           // 0xfc
+    ONE_BYTE_OPCODE,           // 0xfd
+    TWO_BYTE_DISJOINT_OPCODE,  // 0xfe
+    TWO_BYTE_DISJOINT_OPCODE,  // 0xff
+};
+
 // These register names are defined in a way to match the native disassembler
 // formatting. See for example the command "objdump -d <binary file>".
 const char* Registers::names_[kNumRegisters] = {