From: Nathan Moinvaziri <nathan@nathanm.com>
Date: Tue, 13 Jan 2026 00:44:48 +0000 (-0800)
Subject: Fix space indentation formatting in crc32_zbc
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=625613fd09139f3c42a7bc910d303f10e9dca2bb;p=thirdparty%2Fzlib-ng.git

Fix space indentation formatting in crc32_zbc
---

diff --git a/arch/riscv/crc32_zbc.c b/arch/riscv/crc32_zbc.c
index 570c0a664..c56ba1d99 100644
--- a/arch/riscv/crc32_zbc.c
+++ b/arch/riscv/crc32_zbc.c
@@ -20,85 +20,84 @@
 #define CONSTANT_RU 0x1F7011641ULL
 
 static inline uint64_t clmul(uint64_t a, uint64_t b) {
-  uint64_t res;
-  __asm__ volatile("clmul %0, %1, %2" : "=r"(res) : "r"(a), "r"(b));
-  return res;
+    uint64_t res;
+    __asm__ volatile("clmul %0, %1, %2" : "=r"(res) : "r"(a), "r"(b));
+    return res;
 }
 
 static inline uint64_t clmulh(uint64_t a, uint64_t b) {
-  uint64_t res;
-  __asm__ volatile("clmulh %0, %1, %2" : "=r"(res) : "r"(a), "r"(b));
-  return res;
+    uint64_t res;
+    __asm__ volatile("clmulh %0, %1, %2" : "=r"(res) : "r"(a), "r"(b));
+    return res;
 }
 
 Z_FORCEINLINE static uint32_t crc32_clmul_impl(uint64_t crc, const unsigned char *buf, uint64_t len) {
-  const uint64_t *buf64 = (const uint64_t *)buf;
-  uint64_t low = buf64[0] ^ crc;
-  uint64_t high = buf64[1];
+    const uint64_t *buf64 = (const uint64_t *)buf;
+    uint64_t low = buf64[0] ^ crc;
+    uint64_t high = buf64[1];
 
-  if (len < 16)
-    goto finish_fold;
-  len -= 16;
-  buf64 += 2;
+    if (len < 16)
+        goto finish_fold;
+    len -= 16;
+    buf64 += 2;
 
-  // process each 16-byte block
-  while (len >= 16) {
-    uint64_t t2 = clmul(CONSTANT_R4, high);
-    uint64_t t3 = clmulh(CONSTANT_R4, high);
+    // process each 16-byte block
+    while (len >= 16) {
+        uint64_t t2 = clmul(CONSTANT_R4, high);
+        uint64_t t3 = clmulh(CONSTANT_R4, high);
 
-    uint64_t t0_new = clmul(CONSTANT_R3, low);
-    uint64_t t1_new = clmulh(CONSTANT_R3, low);
+        uint64_t t0_new = clmul(CONSTANT_R3, low);
+        uint64_t t1_new = clmulh(CONSTANT_R3, low);
 
-    // Combine the results and XOR with new data
-    low = t0_new ^ t2;
-    high = t1_new ^ t3;
-    low ^= buf64[0];
-    high ^= buf64[1];
+        // Combine the results and XOR with new data
+        low = t0_new ^ t2;
+        high = t1_new ^ t3;
+        low ^= buf64[0];
+        high ^= buf64[1];
 
-    buf64 += 2;
-    len -= 16;
-  }
+        buf64 += 2;
+        len -= 16;
+    }
 
 finish_fold:
-  // Fold the 128-bit result into 64 bits
-  uint64_t fold_t3 = clmulh(low, CONSTANT_R4);
-  uint64_t fold_t2 = clmul(low, CONSTANT_R4);
-  low = high ^ fold_t2;
-  high = fold_t3;
-
-  // Combine the low and high parts and perform polynomial reduction
-  uint64_t combined = (low >> 32) | ((high & MASK32) << 32);
-  uint64_t reduced_low = clmul(low & MASK32, CONSTANT_R5) ^ combined;
-
-  // Barrett reduction step
-  uint64_t barrett = clmul(reduced_low & MASK32, CONSTANT_RU) & MASK32;
-  barrett = clmul(barrett, CRCPOLY_TRUE_LE_FULL);
-  uint64_t final = barrett ^ reduced_low;
-
-  // Return the high 32 bits as the final CRC
-  return (uint32_t)(final >> 32);
+    // Fold the 128-bit result into 64 bits
+    uint64_t fold_t3 = clmulh(low, CONSTANT_R4);
+    uint64_t fold_t2 = clmul(low, CONSTANT_R4);
+    low = high ^ fold_t2;
+    high = fold_t3;
+
+    // Combine the low and high parts and perform polynomial reduction
+    uint64_t combined = (low >> 32) | ((high & MASK32) << 32);
+    uint64_t reduced_low = clmul(low & MASK32, CONSTANT_R5) ^ combined;
+
+    // Barrett reduction step
+    uint64_t barrett = clmul(reduced_low & MASK32, CONSTANT_RU) & MASK32;
+    barrett = clmul(barrett, CRCPOLY_TRUE_LE_FULL);
+    uint64_t final = barrett ^ reduced_low;
+
+    // Return the high 32 bits as the final CRC
+    return (uint32_t)(final >> 32);
 }
 
-Z_INTERNAL uint32_t crc32_riscv64_zbc(uint32_t crc, const uint8_t *buf,
-                                      size_t len) {
-  if (len < CLMUL_MIN_LEN) {
-    return crc32_braid(crc, buf, len);
-  }
-
-  uint64_t unaligned_length = len % CLMUL_CHUNK_LEN;
-  if (unaligned_length) {
-    crc = crc32_braid(crc, buf, unaligned_length);
-    buf += unaligned_length;
-    len -= unaligned_length;
-  }
-  crc ^= 0xFFFFFFFF;
-  crc = crc32_clmul_impl(crc, buf, len);
-  return crc ^ 0xFFFFFFFF;
+Z_INTERNAL uint32_t crc32_riscv64_zbc(uint32_t crc, const uint8_t *buf, size_t len) {
+    if (len < CLMUL_MIN_LEN) {
+        return crc32_braid(crc, buf, len);
+    }
+
+    uint64_t unaligned_length = len % CLMUL_CHUNK_LEN;
+    if (unaligned_length) {
+        crc = crc32_braid(crc, buf, unaligned_length);
+        buf += unaligned_length;
+        len -= unaligned_length;
+    }
+    crc ^= 0xFFFFFFFF;
+    crc = crc32_clmul_impl(crc, buf, len);
+    return crc ^ 0xFFFFFFFF;
 }
 
 Z_INTERNAL uint32_t crc32_copy_riscv64_zbc(uint32_t crc, uint8_t *dst, const uint8_t *src, size_t len) {
-  crc = crc32_riscv64_zbc(crc, src, len);
-  memcpy(dst, src, len);
-  return crc;
+    crc = crc32_riscv64_zbc(crc, src, len);
+    memcpy(dst, src, len);
+    return crc;
 }
 #endif