From a2c47f28132910a1bcad96da19fc48e93385f2bb Mon Sep 17 00:00:00 2001
From: Chanry <scrdyx@163.com>
Date: Sun, 14 Jul 2019 19:58:10 +0800
Subject: [PATCH] calculate M value wrongly

if E is equal to 24, the result is correct; otherwise, result wrong. M cannot be calculated in that way.
---
 chapter2/code/floats/float-f2i.c | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/chapter2/code/floats/float-f2i.c b/chapter2/code/floats/float-f2i.c
index e3a1088e..d07a1757 100644
--- a/chapter2/code/floats/float-f2i.c
+++ b/chapter2/code/floats/float-f2i.c
@@ -49,12 +49,11 @@ int float_f2i(float_bits f) {
     num = 0x80000000;
   } else {
     E = exp - bias;
-    M = frac | 0x800000;
     if (E > 23) {
-      num = M << (E - 23);
+      num = (1 << E) | (frac << (E - 23));
     } else {
       /* whether sig is 1 or 0, round to zero */
-      num = M >> (23 - E);
+      num = (1 << E) | (frac >> (23 - E));
     }
   }