From 3d09b721b94e18fe1f853a04799697f5de10b291 Mon Sep 17 00:00:00 2001
From: Lasse Collin <lasse.collin@tukaani.org>
Date: Mon, 8 Apr 2024 21:51:55 +0300
Subject: debug: Add generator for the ARM64 test file data.

---
 debug/Makefile.am         |   3 +-
 debug/testfilegen-arm64.c | 116 ++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 118 insertions(+), 1 deletion(-)
 create mode 100644 debug/testfilegen-arm64.c

diff --git a/debug/Makefile.am b/debug/Makefile.am
index 7295ee61..db6f47f7 100644
--- a/debug/Makefile.am
+++ b/debug/Makefile.am
@@ -11,7 +11,8 @@ noinst_PROGRAMS = \
 	memusage \
 	crc32 \
 	known_sizes \
-	hex2bin
+	hex2bin \
+	testfilegen-arm64
 
 AM_CPPFLAGS = \
 	-I$(top_srcdir)/src/common \
diff --git a/debug/testfilegen-arm64.c b/debug/testfilegen-arm64.c
new file mode 100644
index 00000000..88cadcaa
--- /dev/null
+++ b/debug/testfilegen-arm64.c
@@ -0,0 +1,116 @@
+// SPDX-License-Identifier: 0BSD
+
+///////////////////////////////////////////////////////////////////////////////
+//
+/// \file       testfilegen-arm64.c
+/// \brief      Generates uncompressed test file for the ARM64 filter
+//
+//  Author:     Lasse Collin
+//
+///////////////////////////////////////////////////////////////////////////////
+
+#include <stdbool.h>
+#include <stdint.h>
+#include <stdio.h>
+
+
+static uint32_t pc4 = 0;
+
+
+static void
+put32le(uint32_t v)
+{
+	putchar((v >> 0) & 0xFF);
+	putchar((v >> 8) & 0xFF);
+	putchar((v >> 16) & 0xFF);
+	putchar((v >> 24) & 0xFF);
+	++pc4;
+}
+
+
+static void
+putbl(uint32_t imm)
+{
+	imm &= (1U << 26) - 1;
+	imm |= 0x25U << 26;
+	put32le(imm);
+}
+
+
+static void
+putadrp32(uint32_t imm)
+{
+	imm &= 0x1FFFFFU;
+
+	// fprintf(stderr, "ADRP 0x%08X\n", imm);
+
+	uint32_t instr = 0x90000000;
+	instr |= (pc4 * 5 + 11) & 0x1F;
+	instr |= (imm & 3) << 29;
+	instr |= (imm >> 2) << 5;
+
+	put32le(instr);
+}
+
+
+extern int
+main(void)
+{
+	putbl(0);
+	putbl(0x03FFFFFF);
+	putbl(0x03FFFFFE);
+	putbl(0x03FFFFFD);
+
+	putbl(3);
+	putbl(2);
+	putbl(1);
+	putbl(0);
+
+
+	putbl(0x02000001);
+	putbl(0x02000000);
+	putbl(0x01FFFFFF);
+	putbl(0x01FFFFFE);
+
+	putbl(0x01111117);
+	putbl(0x01111116);
+	putbl(0x01111115);
+	putbl(0x01111114);
+
+
+	putbl(0x02222227);
+	putbl(0x02222226);
+	putbl(0x02222225);
+	putbl(0x02222224);
+
+	putbl(0U - pc4);
+	putbl(0U - pc4);
+	putbl(0U - pc4);
+	putbl(0U - pc4);
+
+	putadrp32(0x00);
+	putadrp32(0x05);
+	putadrp32(0x15);
+	putadrp32(0x25);
+
+	for (unsigned rep = 0; rep < 2; ++rep) {
+		while ((pc4 << 2) & 4095)
+			put32le(0x55555555U);
+
+		for (unsigned i = 10; i <= 21; ++i) {
+			const uint32_t neg = (0x1FFF00 >> (21 - i)) & ~255U;
+			const uint32_t plus = 1U << (i - 1);
+			putadrp32(0x000000 | plus);
+			putadrp32(0x000005 | plus);
+			putadrp32(0x0000FE | plus);
+			putadrp32(0x0000FF | plus);
+
+			putadrp32(0x000000 | neg);
+			putadrp32(0x000005 | neg);
+			putadrp32(0x0000FE | neg);
+			putadrp32(0x0000FF | neg);
+		}
+	}
+
+	return 0;
+}
-- 
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