Re: [PATCH] riscv: thead: Add sign/zero extension support for th.ext and th.extu

[Jeff Law via Gcc-patches]

On 3/15/23 06:24, Christoph Muellner wrote:

From: Christoph Müllner <christoph.muell...@vrull.eu>

The current support of the bitfield-extraction instructions
th.ext and th.extu (XTheadBb extension) only covers sign_extract
and zero_extract. This patch add support for sign_extend and
zero_extend to avoid any shifts for sign or zero extensions.

gcc/ChangeLog:

        * config/riscv/riscv.md:
        * config/riscv/thead.md (*extend<SHORT:mode><SUPERQI:mode>2_th_ext):
        (*zero_extendsidi2_th_extu):
        (*zero_extendhi<GPR:mode>2_th_extu):

gcc/testsuite/ChangeLog:

        * gcc.target/riscv/xtheadbb-ext-1.c: New test.
        * gcc.target/riscv/xtheadbb-extu-1.c: New test.

OK.  Though the main part of the ChangeLog needs some content ;-)

jeff