From 5d1954365b9c1010372dfc020afb7ff7450b4e14 Mon Sep 17 00:00:00 2001
From: Stanislaw Halik <sthalik@misaki.pl>
Date: Wed, 11 Oct 2023 17:53:25 +0200
Subject: a

---
 compat/int-hash.cpp | 35 ++++++++---------------------------
 compat/int-hash.hpp |  4 ++--
 2 files changed, 10 insertions(+), 29 deletions(-)

(limited to 'compat')

diff --git a/compat/int-hash.cpp b/compat/int-hash.cpp
index 79b5dfad..f9ae19c1 100644
--- a/compat/int-hash.cpp
+++ b/compat/int-hash.cpp
@@ -35,41 +35,22 @@ fm_UNROLL_8
 
 } // namespace
 
-#define fnvhash_64_ROUND() do { hash *= 0x01000193u; hash ^= (uint8_t)*str++; } while(false)
-
-uint64_t fnvhash_64(const void* str_, size_t size)
+uint64_t fnvhash_32(const void* buf, size_t size)
 {
-    const auto *str = (const char*)str_;
+    const auto *str = (const char*)buf, *const end = str + size;
     uint32_t hash = 0x811c9dc5u;
-    size_t full = size / 8;
-    for (size_t i = 0; i < full; i++)
-    {
-        fnvhash_64_ROUND();
-        fnvhash_64_ROUND();
-        fnvhash_64_ROUND();
-        fnvhash_64_ROUND();
-        fnvhash_64_ROUND();
-        fnvhash_64_ROUND();
-        fnvhash_64_ROUND();
-        fnvhash_64_ROUND();
-    }
-    switch (size & 7u)
+fm_UNROLL_8
+    for (; str != end; ++str)
     {
-    case 7: fnvhash_64_ROUND(); [[fallthrough]];
-    case 6: fnvhash_64_ROUND(); [[fallthrough]];
-    case 5: fnvhash_64_ROUND(); [[fallthrough]];
-    case 4: fnvhash_64_ROUND(); [[fallthrough]];
-    case 3: fnvhash_64_ROUND(); [[fallthrough]];
-    case 2: fnvhash_64_ROUND(); [[fallthrough]];
-    case 1: fnvhash_64_ROUND(); [[fallthrough]];
-    case 0: break;
+        hash *= 0x01000193u;
+        hash ^= (uint8_t)*str;
     }
     return hash;
 }
 
-uint64_t fnvhash_32(const void* str_, size_t size)
+uint64_t fnvhash_64(const void* buf, size_t size)
 {
-    const auto *str = (const char*)str_, *end = str + size;
+    const auto *str = (const char*)buf, *const end = str + size;
     uint64_t hash = 0xcbf29ce484222325u;
 fm_UNROLL_4
     for (; str != end; ++str)
diff --git a/compat/int-hash.hpp b/compat/int-hash.hpp
index 6a6cbcd4..86fc6a45 100644
--- a/compat/int-hash.hpp
+++ b/compat/int-hash.hpp
@@ -5,7 +5,7 @@ namespace floormat {
 size_t int_hash(uint32_t x) noexcept;
 size_t int_hash(uint64_t x) noexcept;
 
-uint64_t fnvhash_64(const void* str, size_t size);
-uint64_t fnvhash_32(const void* str, size_t size);
+uint64_t fnvhash_64(const void* buf, size_t size);
+uint64_t fnvhash_32(const void* buf, size_t size);
 
 } // namespace floormat
-- 
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