[FFmpeg-cvslog] lavu/riscv: fallback macros for SH{1, 2, 3}ADD

[Rémi Denis-Courmont]

ffmpeg | branch: master | Rémi Denis-Courmont <remi at remlab.net> | Mon Sep 26 17:52:27 2022 +0300| [39357cad37e865b723c7a97adc27d4a6b4388008] | committer: Lynne

lavu/riscv: fallback macros for SH{1, 2, 3}ADD

Those mnemonics require the very latest binutils release at the time of
writing. These macros provide seamless backward compatibility.

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=39357cad37e865b723c7a97adc27d4a6b4388008
---

 libavutil/riscv/asm.S | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)

diff --git a/libavutil/riscv/asm.S b/libavutil/riscv/asm.S
index dbd97f40a4..de5e1ad0a6 100644
--- a/libavutil/riscv/asm.S
+++ b/libavutil/riscv/asm.S
@@ -75,3 +75,22 @@
                 .purgem endconst
             .endm
         .endm
+
+#if !defined (__riscv_zba)
+        /* SH{1,2,3}ADD definitions for pre-Zba assemblers */
+        .macro  shnadd n, rd, rs1, rs2
+        .insn r OP, 2 * \n, 16, \rd, \rs1, \rs2
+        .endm
+
+        .macro  sh1add rd, rs1, rs2
+        shnadd  1, \rd, \rs1, \rs2
+        .endm
+
+        .macro  sh2add rd, rs1, rs2
+        shnadd  2, \rd, \rs1, \rs2
+        .endm
+
+        .macro  sh3add rd, rs1, rs2
+        shnadd  3, \rd, \rs1, \rs2
+        .endm
+#endif