From 8130296428e174698745f9af1ebb576683a0bc4c Mon Sep 17 00:00:00 2001 From: erich Date: Mon, 6 Jun 1994 13:14:03 +0000 Subject: [PATCH] (PROMOTE_MODE): Promote HImode integers as signed. (BYTES_BIG_ENDIAN): Allow target description to override default. (LOAD_EXTEND_OP): When big-endian, HImode loads are sign extended. git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@7447 138bc75d-0d04-0410-961f-82ee72b054a4 --- gcc/config/arm/arm.h | 14 +++++++++++--- 1 file changed, 11 insertions(+), 3 deletions(-) diff --git a/gcc/config/arm/arm.h b/gcc/config/arm/arm.h index bf5e8d1c67c..2898ad3348b 100644 --- a/gcc/config/arm/arm.h +++ b/gcc/config/arm/arm.h @@ -168,6 +168,8 @@ extern enum processor_type arm_cpu; { \ if (MODE == QImode) \ UNSIGNEDP = 1; \ + else if (MODE == HImode) \ + UNSIGNEDP = 0; \ (MODE) = SImode; \ } @@ -197,8 +199,13 @@ extern enum processor_type arm_cpu; in instructions that operate on numbered bit-fields. */ #define BITS_BIG_ENDIAN 0 -/* Define this if most significant byte of a word is the lowest numbered. */ +/* Define this if most significant byte of a word is the lowest numbered. + Most ARM processors are run in little endian mode, but it should now be + possible to build the compiler to support big endian code. (Note: This + is currently a compiler-build-time option, not a run-time one. */ +#ifndef BYTES_BIG_ENDIAN #define BYTES_BIG_ENDIAN 0 +#endif /* Define this if most significant word of a multiword number is the lowest numbered. */ @@ -1129,8 +1136,9 @@ do \ will either zero-extend or sign-extend. The value of this macro should be the code that says which one of the two operations is implicitly done, NIL if none. */ -#define LOAD_EXTEND_OP(MODE) \ - ((MODE) == QImode ? ZERO_EXTEND : NIL) +#define LOAD_EXTEND_OP(MODE) \ + ((MODE) == QImode ? ZERO_EXTEND \ + : ((BYTES_BIG_ENDIAN && (MODE) == HImode) ? SIGN_EXTEND : NIL)) /* Define this if zero-extension is slow (more than one real instruction). On the ARM, it is more than one instruction only if not fetching from -- 2.11.4.GIT