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Thu, 22 Sep 2022 13:12:17 -0700 (PDT) From: James Almer To: ffmpeg-devel@ffmpeg.org Date: Thu, 22 Sep 2022 17:12:05 -0300 Message-Id: <20220922201205.5880-1-jamrial@gmail.com> X-Mailer: git-send-email 2.37.3 In-Reply-To: <20220922185834.5700-2-jamrial@gmail.com> References: <20220922185834.5700-2-jamrial@gmail.com> MIME-Version: 1.0 Subject: [FFmpeg-devel] [PATCH 3/3] x86/lpc: use fused negative multiply-add instructions where useful X-BeenThere: ffmpeg-devel@ffmpeg.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: FFmpeg development discussions and patches List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Reply-To: FFmpeg development discussions and patches Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: ffmpeg-devel-bounces@ffmpeg.org Sender: "ffmpeg-devel" Archived-At: List-Archive: List-Post: Signed-off-by: James Almer --- libavcodec/x86/lpc.asm | 17 +++++++++++++++-- 1 file changed, 15 insertions(+), 2 deletions(-) diff --git a/libavcodec/x86/lpc.asm b/libavcodec/x86/lpc.asm index 61a5796e5d..a585c17ef5 100644 --- a/libavcodec/x86/lpc.asm +++ b/libavcodec/x86/lpc.asm @@ -79,11 +79,12 @@ cglobal lpc_apply_welch_window, 3, 5, 8, data, len, out, off1, off2 .loop_o: movapd m1, m6 - mulpd m2, m0, m0 - subpd m1, m2 %if cpuflag(avx2) + fnmaddpd m1, m0, m0, m1 vpermpd m2, m1, q0123 %else + mulpd m2, m0, m0 + subpd m1, m2 shufpd m2, m1, m1, 01b %endif @@ -116,8 +117,12 @@ cglobal lpc_apply_welch_window, 3, 5, 8, data, len, out, off1, off2 .loop_o_scalar: movapd xm1, xm6 +%if cpuflag(avx2) + fnmaddpd xm1, xm0, xm0, xm1 +%else mulpd xm2, xm0, xm0 subpd xm1, xm2 +%endif cvtdq2pd xm3, [dataq + off1q] cvtdq2pd xm4, [dataq + off2q] @@ -174,8 +179,12 @@ cglobal lpc_apply_welch_window, 3, 5, 8, data, len, out, off1, off2 .loop_e: movapd m1, m6 +%if cpuflag(avx2) + fnmaddpd m1, m0, m0, m1 +%else mulpd m2, m0, m0 subpd m1, m2 +%endif %if cpuflag(avx2) vpermpd m2, m1, q0123 %else @@ -210,8 +219,12 @@ cglobal lpc_apply_welch_window, 3, 5, 8, data, len, out, off1, off2 .loop_e_scalar: movapd xm1, xm6 +%if cpuflag(avx2) + fnmaddpd xm1, xm0, xm0, xm1 +%else mulpd xm2, xm0, xm0 subpd xm1, xm2 +%endif cvtdq2pd xm3, [dataq + off1q] cvtdq2pd xm4, [dataq + off2q] -- 2.37.3 _______________________________________________ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-devel To unsubscribe, visit link above, or email ffmpeg-devel-request@ffmpeg.org with subject "unsubscribe".