From 94c87bf33c15b2ef8eb36c2048636e621e81aa92 Mon Sep 17 00:00:00 2001
From: "18218461270@163.com" <18218461270@163.com>
Date: Thu, 31 Jul 2025 21:58:10 +0800
Subject: [PATCH] update datalab

---
 labs/datalab/bits.c | 78 ++++++++++++++++++++++-----------------------
 1 file changed, 39 insertions(+), 39 deletions(-)

diff --git a/labs/datalab/bits.c b/labs/datalab/bits.c
index 802fd37..5600b3f 100644
--- a/labs/datalab/bits.c
+++ b/labs/datalab/bits.c
@@ -174,11 +174,11 @@ int isTmax(int x) {
  *   Rating: 2
  */
 int allOddBits(int x) {
-  x = x & (x >> 16);
-  x = x & (x >> 8);
-  x = x & (x >> 4);
-  x = x & (x >> 2);
-  return (x >> 1) & 0x01;
+  x &= x >> 16;
+  x &= x >> 8;
+  x &= x >> 4;
+  x &= x >> 2;
+  return (x >> 1) & 1;
 }
 /* 
  * negate - return -x 
@@ -201,7 +201,7 @@ int negate(int x) {
  *   Rating: 3
  */
 int isAsciiDigit(int x) {
-  x = x ^ 0x30;
+  x ^= 0x30;
   return (!(x >> 4)) & ((~x >> 3) | ((~x >> 2) & (~x >> 1)));
 }
 /* 
@@ -212,8 +212,8 @@ int isAsciiDigit(int x) {
  *   Rating: 3
  */
 int conditional(int x, int y, int z) {
-  x = !x - 1;
-  return (x & y) | (~x & z);
+  x = ~!x + 1;
+  return (~x & y) | (x & z);
 }
 /* 
  * isLessOrEqual - if x <= y  then return 1, else return 0 
@@ -237,11 +237,11 @@ int isLessOrEqual(int x, int y) {
  *   Rating: 4 
  */
 int logicalNeg(int x) {
-  x = x | (x >> 16);
-  x = x | (x >> 8);
-  x = x | (x >> 4);
-  x = x | (x >> 2);
-  x = x | (x >> 1);
+  x |= x >> 16;
+  x |= x >> 8;
+  x |= x >> 4;
+  x |= x >> 2;
+  x |= x >> 1;
   return ~x & 1;
 }
 /* howManyBits - return the minimum number of bits required to represent x in
@@ -258,23 +258,23 @@ int logicalNeg(int x) {
  */
 int howManyBits(int x) {
   int cnt = 1, a;
-  x = x ^ (x >> 31);
+  x ^= x >> 31;
 
   a = !!(x >> 16) << 4;
-  x = x >> a;
-  cnt = cnt + a;
+  x >>= a;
+  cnt += a;
 
   a = !!(x >> 8) << 3;
-  x = x >> a;
-  cnt = cnt + a;
+  x >>= a;
+  cnt += a;
 
   a = !!(x >> 4) << 2;
-  x = x >> a;
-  cnt = cnt + a;
+  x >>= a;
+  cnt += a;
 
   a = !!(x >> 2) << 1;
-  x = x >> a;
-  cnt = cnt + a;
+  x >>= a;
+  cnt += a;
 
   return cnt + !!x + !!(x >> 1);
 }
@@ -293,22 +293,22 @@ int howManyBits(int x) {
 unsigned floatScale2(unsigned uf) {
   unsigned s = uf & 0x80000000, f = uf & 0x007FFFFF, e = (uf >> 23) & 0xFF;
 
-  if (e == 0xFFU) {
+  if (e == 0xFF) {
     return uf;
   }
 
-  if (e == 0U) {
-    if (f == 0U) {
+  if (e == 0) {
+    if (f == 0) {
       return uf;
     } else {
-      e = (f >= 0x00400000U);
-      f = (f << 1) & 0x007FFFFFU;
+      e = f >= 0x00400000;
+      f = (f << 1) & 0x007FFFFF;
       return s | (e << 23) | f;
     }
   }
   
-  e = e + 1;
-  if (e == 0xFFU) {
+  e++;
+  if (e == 0xFF) {
     f = 0;
   }
   return s | (e << 23) | f;
@@ -328,11 +328,11 @@ unsigned floatScale2(unsigned uf) {
 int floatFloat2Int(unsigned uf) {
   unsigned s = uf & 0x80000000, f = uf & 0x007FFFFF, e = (uf >> 23) & 0xFF;
   
-  if (e == 0xFFU) {
-    return 0x80000000U;
+  if (e == 0xFF) {
+    return 0x80000000;
   }
 
-  if (e == 0U) {
+  if (e == 0) {
     return 0;
   } else {
     int E = e - 127;
@@ -340,15 +340,15 @@ int floatFloat2Int(unsigned uf) {
     if (E <= -1) {
       return 0;
     } else if (E <= 30) {
-      f = (f | 0x00800000);
+      f |= 0x00800000;
       if (E >= 23) {
-        f = f << (E - 23);
+        f <<= E - 23;
       } else {
-        f = f >> (23 - E);
+        f >>= 23 - E;
       }
       return s ? -f : f;
     } else {
-      return 0x80000000U;
+      return 0x80000000;
     }
   }
 }
@@ -367,12 +367,12 @@ int floatFloat2Int(unsigned uf) {
  */
 unsigned floatPower2(int x) {
   if (x < -149) {
-    return 0U;
+    return 0;
   } else if (x <= -127) {
-    return 1U << (x + 149);
+    return 1 << (x + 149);
   } else if (x <= 127) {
     return (x + 127) << 23;
   } else {
-    return 0x7F800000U;
+    return 0x7F800000;
   }
 }