shithub: dav1d

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Only perform stack allocation on WIN64 in ipred_filter_avx2

Makes it possible to use <32-byte stack alignment on non-Windows systems.

The stack space is used to store xmm registers which is only required
on 64-bit Windows.

--- a/src/x86/ipred.asm

+++ b/src/x86/ipred.asm

@@ -2249,10 +2249,12 @@

     RET

 ALIGN function_align

 .w16:

+%if WIN64

     %assign stack_offset stack_offset - stack_size_padded

     %assign xmm_regs_used 15

     %assign stack_size_padded 0x98

     SUB                 rsp, stack_size_padded

+%endif

     sub                  hd, 2

     TAIL_CALL .w16_main, 0

 .w16_main: