RFR: 8320347: Emulate vblendvp[sd] on ECore [v7]

Mon Nov 27 15:18:13 UTC 2023

On Mon, 27 Nov 2023 05:46:26 GMT, Jatin Bhateja <jbhateja at openjdk.org> wrote:

> There are few other usages of variable blends in following methods, please call new macro assembly routines in its place. C2_MacroAssembler::vector_cast_double_to_int_special_cases_avx C2_MacroAssembler::vector_count_leading_zeros_int_avx C2_MacroAssembler::vector_cast_float_to_int_special_cases_avx

I considered it. To change it however, I need to understand what each of those functions are doing, write (of find) a test case and verify that the test case is indeed verifying my change (i.e. both functional assembly logs and performance benchmark).. 

(It looks like the new macro assembler should be 'completely safe' but.. just looking at this PR, I would rather be thorough)

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PR Comment: https://git.openjdk.org/jdk/pull/16716#issuecomment-1828031522