@@ -162,7 +162,9 @@ AVFixedDSPContext * avpriv_alloc_fixed_dsp(int bit_exact)
fdsp->butterflies_fixed = butterflies_fixed_c;
fdsp->scalarproduct_fixed = scalarproduct_fixed_c;
-#if ARCH_X86
+#if ARCH_RISCV
+ ff_fixed_dsp_init_riscv(fdsp);
+#elif ARCH_X86
ff_fixed_dsp_init_x86(fdsp);
#endif
@@ -161,6 +161,7 @@ typedef struct AVFixedDSPContext {
*/
AVFixedDSPContext * avpriv_alloc_fixed_dsp(int strict);
+void ff_fixed_dsp_init_riscv(AVFixedDSPContext *fdsp);
void ff_fixed_dsp_init_x86(AVFixedDSPContext *fdsp);
/**
@@ -1,3 +1,5 @@
OBJS += riscv/cpu.o \
+ riscv/fixed_dsp_init.o \
+ riscv/fixed_dsp_rvv.o \
riscv/float_dsp_init.o \
riscv/float_dsp_rvv.o
new file mode 100644
@@ -0,0 +1,33 @@
+/*
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include <stdint.h>
+
+#include "libavutil/attributes.h"
+#include "libavutil/cpu.h"
+#include "libavutil/fixed_dsp.h"
+
+void ff_butterflies_fixed_rvv(int *v1, int *v2, int len);
+
+av_cold void ff_fixed_dsp_init_riscv(AVFixedDSPContext *fdsp)
+{
+ int flags = av_get_cpu_flags();
+
+ if (flags & AV_CPU_FLAG_ZVE32X)
+ fdsp->butterflies_fixed = ff_butterflies_fixed_rvv;
+}
new file mode 100644
@@ -0,0 +1,38 @@
+/*
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include "config.h"
+#include "asm.S"
+
+// (a0) = (a0) + (a1), (a1) = (a0) - (a1) [0..a2-1]
+func ff_butterflies_fixed_rvv, zve32x
+1: vsetvli t0, a2, e32, m8, ta, ma
+ slli t1, t0, 2
+ vle32.v v16, (a0)
+ vle32.v v24, (a1)
+ vadd.vv v0, v16, v24
+ vsub.vv v8, v16, v24
+ sub a2, a2, t0
+ vse32.v v0, (a0)
+ add a0, a0, t1
+ vse32.v v8, (a1)
+ add a1, a1, t1
+ bnez a2, 1b
+
+ ret
+endfunc
From: Rémi Denis-Courmont <remi@remlab.net> --- libavutil/fixed_dsp.c | 4 +++- libavutil/fixed_dsp.h | 1 + libavutil/riscv/Makefile | 2 ++ libavutil/riscv/fixed_dsp_init.c | 33 +++++++++++++++++++++++++++ libavutil/riscv/fixed_dsp_rvv.S | 38 ++++++++++++++++++++++++++++++++ 5 files changed, 77 insertions(+), 1 deletion(-) create mode 100644 libavutil/riscv/fixed_dsp_init.c create mode 100644 libavutil/riscv/fixed_dsp_rvv.S