cmd/internal/obj: remove use of "iota - X"

This was inserted by c2go to turn each enum { ... } into one const ( ... ) block,
but it is fragile and was never intended as a long-term thing.

Change-Id: I8de8e0984b130456da70e4d59891276dfef7ac27
Reviewed-on: https://go-review.googlesource.com/6932Reviewed-by: Rob Pike <r@golang.org>

src/cmd/internal/obj/link.go

@@ -402,8 +402,11 @@ const (
 )
 
 const (
-	TYPE_NONE   = 0
-	TYPE_BRANCH = 5 + iota - 1
+	TYPE_NONE = 0
+)
+
+const (
+	TYPE_BRANCH = 5 + iota
 	TYPE_TEXTSIZE
 	TYPE_MEM
 	TYPE_CONST

src/cmd/internal/obj/mgc0.go

@@ -29,7 +29,10 @@ const (
 	BitsPointer     = 2
 	BitsMask        = 3
 	PointersPerByte = 8 / BitsPerPointer
-	InsData         = 1 + iota - 7
+)
+
+const (
+	InsData = 1 + iota
 	InsArray
 	InsArrayEnd
 	InsEnd

src/cmd/internal/obj/ppc64/9.out.go

@@ -77,7 +77,7 @@ const (
 	REG_R30
 	REG_R31
 
-	REG_F0 = obj.RBasePPC64 + 32 + iota - 32
+	REG_F0
 	REG_F1
 	REG_F2
 	REG_F3
@@ -110,9 +110,7 @@ const (
 	REG_F30
 	REG_F31
 
-	REG_SPECIAL = obj.RBasePPC64 + 64
-
-	REG_CR0 = obj.RBasePPC64 + 64 + iota - 65
+	REG_CR0
 	REG_CR1
 	REG_CR2
 	REG_CR3
@@ -121,10 +119,12 @@ const (
 	REG_CR6
 	REG_CR7
 
-	REG_MSR = obj.RBasePPC64 + 72 + iota - 73
+	REG_MSR
 	REG_FPSCR
 	REG_CR
 
+	REG_SPECIAL = REG_CR0
+
 	REG_SPR0 = obj.RBasePPC64 + 1024 // first of 1024 registers
 	REG_DCR0 = obj.RBasePPC64 + 2048 // first of 1024 registers
 

src/cmd/internal/obj/x86/6.out.go

@@ -755,7 +755,10 @@ const (
 
 const (
 	REG_NONE = 0
-	REG_AL   = obj.RBaseAMD64 + 0 + iota - 1
+)
+
+const (
+	REG_AL = obj.RBaseAMD64 + iota
 	REG_CL
 	REG_DL
 	REG_BL
@@ -772,7 +775,7 @@ const (
 	REG_R14B
 	REG_R15B
 
-	REG_AX = obj.RBaseAMD64 + 16 + iota - 17
+	REG_AX
 	REG_CX
 	REG_DX
 	REG_BX
@@ -789,16 +792,30 @@ const (
 	REG_R14
 	REG_R15
 
-	REG_AH = obj.RBaseAMD64 + 32 + iota - 33
+	REG_AH
 	REG_CH
 	REG_DH
 	REG_BH
 
-	REG_F0 = obj.RBaseAMD64 + 36
-
-	REG_M0 = obj.RBaseAMD64 + 44
-
-	REG_X0 = obj.RBaseAMD64 + 52 + iota - 39
+	REG_F0
+	REG_F1
+	REG_F2
+	REG_F3
+	REG_F4
+	REG_F5
+	REG_F6
+	REG_F7
+
+	REG_M0
+	REG_M1
+	REG_M2
+	REG_M3
+	REG_M4
+	REG_M5
+	REG_M6
+	REG_M7
+
+	REG_X0
 	REG_X1
 	REG_X2
 	REG_X3
@@ -815,7 +832,7 @@ const (
 	REG_X14
 	REG_X15
 
-	REG_CS = obj.RBaseAMD64 + 68 + iota - 55
+	REG_CS
 	REG_SS
 	REG_DS
 	REG_ES
@@ -828,14 +845,49 @@ const (
 	REG_MSW  /* machine status word */
 	REG_TASK /* task register */
 
-	REG_CR = obj.RBaseAMD64 + 79
-	REG_DR = obj.RBaseAMD64 + 95
-	REG_TR = obj.RBaseAMD64 + 103
-
-	REG_TLS = obj.RBaseAMD64 + 111 + iota - 69
+	REG_CR0
+	REG_CR1
+	REG_CR2
+	REG_CR3
+	REG_CR4
+	REG_CR5
+	REG_CR6
+	REG_CR7
+	REG_CR8
+	REG_CR9
+	REG_CR10
+	REG_CR11
+	REG_CR12
+	REG_CR13
+	REG_CR14
+	REG_CR15
+
+	REG_DR0
+	REG_DR1
+	REG_DR2
+	REG_DR3
+	REG_DR4
+	REG_DR5
+	REG_DR6
+	REG_DR7
+
+	REG_TR0
+	REG_TR1
+	REG_TR2
+	REG_TR3
+	REG_TR4
+	REG_TR5
+	REG_TR6
+	REG_TR7
+
+	REG_TLS
 
 	MAXREG
 
+	REG_CR = REG_CR0
+	REG_DR = REG_DR0
+	REG_TR = REG_TR0
+
 	REGARG   = -1
 	REGRET   = REG_AX
 	FREGRET  = REG_X0