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| From: | Blue Swirl |
| Subject: | RE: [Qemu-devel] [PATCH][SPARC] mem_address_not_aligned trap forunaligned PC |
| Date: | Sun, 01 Apr 2007 19:15:14 +0200 |
According to the SPARCv8 and SPARCv9 manuals, the jmpl, rett and return instructions should generate a mem_address_not_aligned trap if either of the low-order two bits of the target address is nonzero.
This is true, but in that case alignment should be enforced for loads ands stores as well. The checks also incur a performance penalty for little advantage. Maybe the checks should be enabled only with a compile/run-time option.
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