i.MX ProcessorsのトピックTag_DIV_use: Not allowed https://community.nxp.com/t5/i-MX-Processors/Tag-DIV-use-Not-allowed/m-p/839107#M128751 <HTML><HEAD></HEAD><BODY><P>Hi：</P><P>我们最近在使用imx6ul时，使用readelf命令查询程序属性时，发现有一个Tag_DIV_use: Not allowed</P><P>查询arm手册这句话的意思是UDIV/SDIV禁止使用。难道是imx6ul不支持这两条指令吗，或者是这句话另有所指？</P></BODY></HTML> Fri, 28 Dec 2018 03:38:10 GMT chinaman 2018-12-28T03:38:10Z Tag_DIV_use: Not allowed https://community.nxp.com/t5/i-MX-Processors/Tag-DIV-use-Not-allowed/m-p/839107#M128751 <HTML><HEAD></HEAD><BODY><P>Hi：</P><P>我们最近在使用imx6ul时，使用readelf命令查询程序属性时，发现有一个Tag_DIV_use: Not allowed</P><P>查询arm手册这句话的意思是UDIV/SDIV禁止使用。难道是imx6ul不支持这两条指令吗，或者是这句话另有所指？</P></BODY></HTML> Fri, 28 Dec 2018 03:38:10 GMT https://community.nxp.com/t5/i-MX-Processors/Tag-DIV-use-Not-allowed/m-p/839107#M128751 chinaman 2018-12-28T03:38:10Z Re: Tag_DIV_use: Not allowed https://community.nxp.com/t5/i-MX-Processors/Tag-DIV-use-Not-allowed/m-p/839108#M128752 <HTML><HEAD></HEAD><BODY><P>for SDIV:Assembler User Guide: SDIV&nbsp; </P><TABLE border="0" cellpadding="0" cellspacing="0"><TBODY><TR><TD class=""><DIV class=""><DIV class=""><DIV><DIV class=""><DIV class=""><SPAN style="font-size: 15px;">This 32-bit Thumb instruction is available in ARMv7-R and ARMv7-M.</SPAN></DIV><DIV class=""><SPAN style="font-size: 15px;">This ARM instruction is optional in ARMv7-R.</SPAN></DIV><DIV class=""><SPAN style="font-size: 15px;">There is no 16-bit Thumb <CODE>SDIV</CODE> instruction.</SPAN></DIV></DIV></DIV></DIV></DIV></TD></TR></TBODY></TABLE><P>IMX6UL is ARM cortex A7</P></BODY></HTML> Sat, 29 Dec 2018 06:31:43 GMT https://community.nxp.com/t5/i-MX-Processors/Tag-DIV-use-Not-allowed/m-p/839108#M128752 joanxie 2018-12-29T06:31:43Z Re: Tag_DIV_use: Not allowed https://community.nxp.com/t5/i-MX-Processors/Tag-DIV-use-Not-allowed/m-p/839109#M128753 <HTML><HEAD></HEAD><BODY><P>Dear Xie:</P><P>&nbsp; &nbsp; 感谢您的回复，imx6q也是A系列的，它为啥没有这个限制呢？</P></BODY></HTML> Wed, 02 Jan 2019 02:24:13 GMT https://community.nxp.com/t5/i-MX-Processors/Tag-DIV-use-Not-allowed/m-p/839109#M128753 chinaman 2019-01-02T02:24:13Z Re: Tag_DIV_use: Not allowed https://community.nxp.com/t5/i-MX-Processors/Tag-DIV-use-Not-allowed/m-p/839110#M128754 <HTML><HEAD></HEAD><BODY><P>IMX6Q 应该也是Tag_DIV_use: Not allowed的</P></BODY></HTML> Wed, 23 Jan 2019 08:50:56 GMT https://community.nxp.com/t5/i-MX-Processors/Tag-DIV-use-Not-allowed/m-p/839110#M128754 joanxie 2019-01-23T08:50:56Z