Integrated: 8321215: Incorrect x86 instruction encoding for VSIB addressing mode

Tue Dec 5 16:42:54 UTC 2023

On Mon, 4 Dec 2023 19:09:33 GMT, Sandhya Viswanathan <sviswanathan at openjdk.org> wrote:

> For instructions that use VSIB addressing mode (gather/scatter), the assembler incorrectly sets EVEX.X bit when the VSIB vector register is in the range XMM16 - XMM23. The EVEX.X bit should only be set when bit 3 of the register encoding is 1,  i.e. if the register encoding is 8 - 15 or 24 - 31.

This pull request has now been integrated.

Changeset: 027b5dbb
Author:    Sandhya Viswanathan <sviswanathan at openjdk.org>
URL:       https://git.openjdk.org/jdk/commit/027b5dbb6a299e49d3dcbe67d529d6edc67f16d9
Stats:     1 line in 1 file changed: 0 ins; 0 del; 1 mod

8321215: Incorrect x86 instruction encoding for VSIB addressing mode

Reviewed-by: shade, thartmann

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PR: https://git.openjdk.org/jdk/pull/16957