From: Doug Evans <dje@gnu.org>
Date: Tue, 21 May 1996 17:25:24 +0000 (+0000)
Subject: (STRUCTURE_SIZE_BOUNDARY): Add comment explaining why it's 32.
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=7d94bb81f0abfe4d470eaee2b3c097b1bbe8b421;p=gcc.git

(STRUCTURE_SIZE_BOUNDARY): Add comment explaining why it's 32.

From-SVN: r12066
---

diff --git a/gcc/config/arm/arm.h b/gcc/config/arm/arm.h
index 68e6a15ef13..d7a22a1f09b 100644
--- a/gcc/config/arm/arm.h
+++ b/gcc/config/arm/arm.h
@@ -400,6 +400,9 @@ extern int arm_arch4;
    && (ALIGN) < BITS_PER_WORD ? BITS_PER_WORD : (ALIGN))
 
 /* Every structures size must be a multiple of 32 bits.  */
+/* This is for compatibility with ARMCC.  ARM SDT Reference Manual
+   (ARM DUI 0020D) page 2-20 says "Structures are aligned on word
+   boundaries".  */
 #define STRUCTURE_SIZE_BOUNDARY 32
 
 /* Non-zero if move instructions will actually fail to work