[FFmpeg-devel] [PATCH 4/4] x86inc: Enable AVX emulation in additional cases
Henrik Gramner
henrik at gramner.com
Mon Apr 18 19:03:44 CEST 2016
From: Anton Mitrofanov <BugMaster at narod.ru>
Allows emulation to work when dst is equal to src2 as long as the
instruction is commutative, e.g. `addps m0, m1, m0`.
---
libavutil/x86/x86inc.asm | 21 +++++++++++++--------
1 file changed, 13 insertions(+), 8 deletions(-)
diff --git a/libavutil/x86/x86inc.asm b/libavutil/x86/x86inc.asm
index 0bcfeb3..b2e9c60 100644
--- a/libavutil/x86/x86inc.asm
+++ b/libavutil/x86/x86inc.asm
@@ -1130,14 +1130,12 @@ INIT_XMM
%if __emulate_avx
%xdefine __src1 %7
%xdefine __src2 %8
- %ifnidn %6, %7
- %if %0 >= 9
- CHECK_AVX_INSTR_EMU {%1 %6, %7, %8, %9}, %6, %8, %9
- %else
- CHECK_AVX_INSTR_EMU {%1 %6, %7, %8}, %6, %8
- %endif
- %if %5 && %4 == 0
- %ifnnum sizeof%8
+ %if %5 && %4 == 0
+ %ifnidn %6, %7
+ %ifidn %6, %8
+ %xdefine __src1 %8
+ %xdefine __src2 %7
+ %elifnnum sizeof%8
; 3-operand AVX instructions with a memory arg can only have it in src2,
; whereas SSE emulation prefers to have it in src1 (i.e. the mov).
; So, if the instruction is commutative with a memory arg, swap them.
@@ -1145,6 +1143,13 @@ INIT_XMM
%xdefine __src2 %7
%endif
%endif
+ %endif
+ %ifnidn %6, __src1
+ %if %0 >= 9
+ CHECK_AVX_INSTR_EMU {%1 %6, %7, %8, %9}, %6, __src2, %9
+ %else
+ CHECK_AVX_INSTR_EMU {%1 %6, %7, %8}, %6, __src2
+ %endif
%if __sizeofreg == 8
MOVQ %6, __src1
%elif %3
--
1.9.1
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