style: modernize to splitseq, cut, min, maps.copy and range-over-int

asm/loong64_encode.go

@@ -30,6 +30,8 @@ package asm
 // of the immediate and register fields), mirroring the toolchain's OP_*
 // helpers, so each l64* function only ORs its fields in.
 
+import "maps"
+
 // loong64RegNum returns the 5-bit register number for a LoongArch register
 // name: R0–R31 (integer), F0–F31 (floating point), FCC0–FCC7 (condition
 // flags), FCSR0–FCSR31 (control/status) and the ABI aliases the runtime's
@@ -368,7 +370,7 @@ func init() {
 	// The dual-form arithmetic mnemonics (register 3R + immediate 2RI12),
 	// selected by the operand kind; the shift mnemonics pair the 3R form
 	// with a 5/6-bit shift immediate.
-	for m, e := range map[string]l64DualEnc{
+	maps.Copy(l64DualTable, map[string]l64DualEnc{
 		"ADD":   {rrr: 0x20 << 15, imm: 0x00a << 22},
 		"ADDW":  {rrr: 0x20 << 15, imm: 0x00a << 22},
 		"ADDV":  {rrr: 0x21 << 15, imm: 0x00b << 22},
@@ -386,9 +388,7 @@ func init() {
 		"SRLV":  {rrr: 0x32 << 15, imm: 0x0045 << 16, shift: true},
 		"SRAV":  {rrr: 0x33 << 15, imm: 0x0049 << 16, shift: true},
 		"ROTRV": {rrr: 0x37 << 15, imm: 0x004d << 16, shift: true},
-	} {
-		l64DualTable[m] = e
-	}
+	})
 
 	// 2RI12 — pure immediate arithmetic (LU52ID has no register form).
 	l64InstrTable["LU52ID"] = l64Enc{format: l64Firr, op: 0x00c << 22}