| Message ID | 20240722193818.50824-1-remi@remlab.net |
|---|---|
| State | New |
| Headers | show |
| Series | [FFmpeg-devel,1/6] lavu/riscv: assembly for zicfilp LPAD | expand |
| Context | Check | Description |
|---|---|---|
| andriy/make_x86 | success | Make finished |
| andriy/make_fate_x86 | success | Make fate finished |
diff --git a/libavutil/riscv/asm.S b/libavutil/riscv/asm.S index 2cf4f7b7ab..37fd7d3b03 100644 --- a/libavutil/riscv/asm.S +++ b/libavutil/riscv/asm.S @@ -77,6 +77,12 @@ .endm .endm +#if !defined (__riscv_zicfilp) + .macro lpad lpl + auipc zero, \lpl + .endm +#endif + #if !defined (__riscv_zba) /* SH{1,2,3}ADD definitions for pre-Zba assemblers */ .macro shnadd n, rd, rs1, rs2
This instruction, if aligned on a 4-byte boundary, defines a valid target ("landing pad") for an indirect call or jump. Since this instruction is a HINT, it is safe to assemble even if not included in the target instruction set architecture. The necessary alignment is already provided by the `func` macro. However this still lacks the ELF attribute to indicate that the zicfilp is supported in simple mode. This is left for future work as the ELF specification is not ratified as of yet. This will also nonobviously require the assembler to support zicfilp, insofar as the `tail` pseudo-instruction shall clobber T2 (instead of T1) as its temporary register. --- libavutil/riscv/asm.S | 6 ++++++ 1 file changed, 6 insertions(+)