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[PATCH] [MIPS] Fix operands for microMIPS SW16, SH16 and SB16

From: "Moore, Catherine" <Catherine_Moore at mentor dot com>
To: "gcc-patches at gcc dot gnu dot org" <gcc-patches at gcc dot gnu dot org>
Cc: Richard Sandiford <rdsandiford at googlemail dot com>
Date: Fri, 11 Apr 2014 18:25:15 +0000
Subject: [PATCH] [MIPS] Fix operands for microMIPS SW16, SH16 and SB16
Authentication-results: sourceware.org; auth=none

Hi Richard,

This patch fixes a problem with the SW16, SH16 and SB16 microMIPS instructions.  GCC is incorrectly calculating the length of these instructions if $16 is used as the source operand.  The incorrect length calculation can cause a 32-bit instruction to be placed in a short delay slot.  The assembler does detect this and issues a warning.

This patch changes the allowable registers for the short store instructions to $0, $2-$7, and $17.

Okay to install?  Okay to install for 4.9?

Thanks,
Catherine

Attachment: umips-store.cl
Description: umips-store.cl

Attachment: umips-store.patch
Description: umips-store.patch

Follow-Ups:
- RE: [PATCH] [MIPS] Fix operands for microMIPS SW16, SH16 and SB16
  - From: Matthew Fortune

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