From bad11e92a4ed847603910f204ded741141f2e178 Mon Sep 17 00:00:00 2001
From: Nick Shipp <nick@shipp.ninja>
Date: Sat, 3 Jun 2017 00:44:10 -0400
Subject: Name ymm variables

---
 tools/splitwords.c | 20 ++++++++++----------
 1 file changed, 10 insertions(+), 10 deletions(-)

diff --git a/tools/splitwords.c b/tools/splitwords.c
index 5cf7f04..108b819 100644
--- a/tools/splitwords.c
+++ b/tools/splitwords.c
@@ -26,7 +26,7 @@ main(void)
     struct stat st;
     size_t bytes;
     __m256i *cur, *end;
-    __m256i ymm0, ymm1, ymm2, ymm3, ymm4;
+    __m256i data, mask, space, newline, swap;
     uint64_t it;
 
     if (stat(PATH, &st) == -1) {
@@ -39,7 +39,7 @@ main(void)
         perror("open " PATH);
     }
 
-    mem = (char *)mmap(0, st.st_size, PROT_READ|PROT_WRITE, MAP_PRIVATE, fd, 0);
+    mem = (char *)mmap(0, st.st_size, PROT_READ|PROT_WRITE, MAP_SHARED, fd, 0);
 
     if (mem == MAP_FAILED) {
         perror("mmap");
@@ -51,11 +51,11 @@ main(void)
     end = (__m256i *)(mem + st.st_size);
 
     /*
-     * ymm2 = 32x 0010 0000 
-     * ymm3 = 32x 0000 1010
+     * space = 32x 0010 0000 
+     * newline = 32x 0000 1010
      */
-    ymm2 = _mm256_set1_epi8(' ');
-    ymm3 = _mm256_set1_epi8('\n');
+    space = _mm256_set1_epi8(' ');
+    newline = _mm256_set1_epi8('\n');
 
     /*
      * In 32-byte chunks,
@@ -66,10 +66,10 @@ main(void)
      */
     it = __rdtsc();
     for (cur=(__m256i *)mem;cur < end;cur++) {
-        ymm0 = _mm256_load_si256(cur);
-        ymm1 = _mm256_cmpeq_epi8(ymm0, ymm2);
-        ymm4 = _mm256_blendv_epi8(ymm0, ymm3, ymm1);
-        _mm256_store_si256(cur, ymm4);
+        data = _mm256_load_si256(cur);
+        mask = _mm256_cmpeq_epi8(data, space);
+        swap = _mm256_blendv_epi8(data, newline, mask);
+        _mm256_store_si256(cur, swap);
     }
     printf("%10.6f cycles/byte\n",
             (double)(__rdtsc() - it) / st.st_size);
-- 
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