Add Qlie Pack Archive (.pack) v3.1 unpack support

src/utils/mmx.rs

@@ -0,0 +1,74 @@
+//! MMX Operations in pure Rust
+
+/// Packed Add of Bytes (8-bit integers)
+pub const fn mmx_p_add_b(a: u64, b: u64) -> u64 {
+    let mut mask = 0xFF;
+    let mut r = ((a & mask).wrapping_add(b & mask)) & mask; // First byte
+    mask <<= 8;
+    r |= ((a & mask).wrapping_add(b & mask)) & mask; // Second byte
+    mask <<= 8;
+    r |= ((a & mask).wrapping_add(b & mask)) & mask; // Third byte
+    mask <<= 8;
+    r |= ((a & mask).wrapping_add(b & mask)) & mask; // Fourth byte
+    mask <<= 8;
+    r |= ((a & mask).wrapping_add(b & mask)) & mask; // Fifth byte
+    mask <<= 8;
+    r |= ((a & mask).wrapping_add(b & mask)) & mask; // Sixth byte
+    mask <<= 8;
+    r |= ((a & mask).wrapping_add(b & mask)) & mask; // Seventh byte
+    mask <<= 8;
+    r |= ((a & mask).wrapping_add(b & mask)) & mask; // Eighth byte
+    r
+}
+
+/// Packed Add of Doublewords (32-bit integers)
+pub const fn mmx_p_add_d(a: u64, b: u64) -> u64 {
+    let mut mask = 0xffffffff;
+    let r = ((a & mask).wrapping_add(b & mask)) & mask;
+    mask <<= 32;
+    r | ((a & mask).wrapping_add(b & mask)) & mask
+}
+
+/// Packed Add of Words (16-bit integers)
+pub const fn mmx_p_add_w(a: u64, b: u64) -> u64 {
+    let mut mask = 0xFFFF;
+    let mut r = ((a & mask).wrapping_add(b & mask)) & mask;
+    mask <<= 16;
+    r |= ((a & mask).wrapping_add(b & mask)) & mask;
+    mask <<= 16;
+    r |= ((a & mask).wrapping_add(b & mask)) & mask;
+    mask <<= 16;
+    r |= ((a & mask).wrapping_add(b & mask)) & mask;
+    r
+}
+
+/// Packed Shift Left Logical of Doublewords (32-bit integers)
+pub const fn mmx_p_sll_d(a: u64, mut count: u32) -> u64 {
+    count &= 0x1F;
+    let mut mask = (0xFFFFFFFFu32 << count) as u64;
+    mask |= mask << 32;
+    (a << count) & mask
+}
+
+/// Packed Shift Right Logical of Doublewords (32-bit integers)
+pub const fn mmx_p_srl_d(a: u64, mut count: u32) -> u64 {
+    count &= 0x1F;
+    let mut mask = (0xFFFFFFFFu32 >> count) as u64;
+    mask |= mask << 32;
+    (a >> count) & mask
+}
+
+/// Packed Unpack Low Doubleword
+pub const fn mmx_punpckldq(a: u64, b: u64) -> u64 {
+    (a & 0xFFFFFFFF) | (b & 0xFFFFFFFF) << 32
+}
+
+/// Packed Unpack Low Doubleword with itself
+pub const fn mmx_punpckldq2(a: u64) -> u64 {
+    mmx_punpckldq(a, a)
+}
+
+#[test]
+fn test_mmx() {
+    assert_eq!(mmx_punpckldq(0x1, 0x2), 0x200000001);
+}

src/utils/mod.rs

@@ -21,6 +21,8 @@ pub mod jxl;
 #[cfg(feature = "lossless-audio")]
 pub mod lossless_audio;
 mod macros;
+#[cfg(feature = "utils-mmx")]
+pub mod mmx;
 pub mod name_replacement;
 pub mod num_range;
 #[cfg(feature = "utils-pcm")]