From c8de23f6787b4205b405d80c82bed9d7b3427ec3 Mon Sep 17 00:00:00 2001
From: gingerBill <gingerBill@users.noreply.github.com>
Date: Sun, 14 Jun 2026 19:22:31 +0100
Subject: [PATCH] Minimize arm64 decoding table

---
 core/rexcode/arm64/decoding_tables.odin       | 30 +++++++++----------
 core/rexcode/arm64/encoding_table.odin        |  2 +-
 .../arm64/tools/gen_decode_tables.odin        |  6 ++--
 3 files changed, 17 insertions(+), 21 deletions(-)

diff --git a/core/rexcode/arm64/decoding_tables.odin b/core/rexcode/arm64/decoding_tables.odin
index 94f0e2461..c0b43c17a 100644
--- a/core/rexcode/arm64/decoding_tables.odin
+++ b/core/rexcode/arm64/decoding_tables.odin
@@ -1230,21 +1230,19 @@ DECODE_ENTRIES := [1198]Decode_Entry{
 
 @(rodata)
 DECODE_INDEX_OP0 := [16]Decode_Index{
-	/* 0 */ {0, 75},
-	/* 1 */ {0, 0},
-	/* 2 */ {75, 379},
-	/* 3 */ {0, 0},
-	/* 4 */ {454, 76},
-	/* 5 */ {530, 50},
-	/* 6 */ {580, 8},
-	/* 7 */ {588, 93},
-	/* 8 */ {681, 16},
-	/* 9 */ {697, 34},
-	/* A */ {731, 98},
-	/* B */ {829, 21},
-	/* C */ {850, 150},
-	/* D */ {1000, 84},
-	/* E */ {1084, 13},
-	/* F */ {1097, 101},
+	0x00 = {0, 75},
+	0x02 = {75, 379},
+	0x04 = {454, 76},
+	0x05 = {530, 50},
+	0x06 = {580, 8},
+	0x07 = {588, 93},
+	0x08 = {681, 16},
+	0x09 = {697, 34},
+	0x0A = {731, 98},
+	0x0B = {829, 21},
+	0x0C = {850, 150},
+	0x0D = {1000, 84},
+	0x0E = {1084, 13},
+	0x0F = {1097, 101},
 }
 
diff --git a/core/rexcode/arm64/encoding_table.odin b/core/rexcode/arm64/encoding_table.odin
index 36aea822d..50664ece8 100644
--- a/core/rexcode/arm64/encoding_table.odin
+++ b/core/rexcode/arm64/encoding_table.odin
@@ -26,7 +26,7 @@ package rexcode_arm64
 // immediate encoding (N:imms:immr); they're deferred to a follow-up
 // turn that adds the bitmask encoder helper.
 @(rodata)
-ENCODING_TABLE: [Mnemonic][]Encoding = #partial {
+ENCODING_TABLE := #partial [Mnemonic][]Encoding{
 	.INVALID = {},
 
 	// =========================================================================
diff --git a/core/rexcode/arm64/tools/gen_decode_tables.odin b/core/rexcode/arm64/tools/gen_decode_tables.odin
index 2065db0e8..6ac09a025 100644
--- a/core/rexcode/arm64/tools/gen_decode_tables.odin
+++ b/core/rexcode/arm64/tools/gen_decode_tables.odin
@@ -177,10 +177,8 @@ emit_range_table :: proc(sb: ^strings.Builder, name: string, ranges: []Range) {
 	fmt.sbprintfln(sb, "@(rodata)")
 	fmt.sbprintfln(sb, "%s := [%d]Decode_Index{{", name, len(ranges))
 	for r, i in ranges {
-		if r.count == 0 {
-			fmt.sbprintfln(sb, "\t/* %X */ {{0, 0}},", i)
-		} else {
-			fmt.sbprintfln(sb, "\t/* %X */ {{%d, %d}},", i, r.start, r.count)
+		if r.count != 0 {
+			fmt.sbprintfln(sb, "\t0x%02X = {{%d, %d}},", i, r.start, r.count)
 		}
 	}
 	strings.write_string(sb, "}\n\n")