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Re: [PATCH] target/s390x: Optimize save_link_info() using extract() TCG


From: Richard Henderson
Subject: Re: [PATCH] target/s390x: Optimize save_link_info() using extract() TCG opcode
Date: Sun, 3 Oct 2021 11:31:47 -0400
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.13.0

On 10/3/21 10:29 AM, Philippe Mathieu-Daudé wrote:
-    tcg_gen_shri_i64(t, psw_mask, 16);
-    tcg_gen_andi_i64(t, t, 0x0f000000);
+    tcg_gen_extract_i64(t, psw_mask, 40, 4);

No, the result should not be at bit 0, but bit 24.


r~



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