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vp9: don't keep a stack pointer if we don't need it.

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This saves one register in a few cases on 32bit builds with unaligned
stack (e.g. MSVC), making the code slightly easier to maintain.

(Can someone please test this on 32bit+msvc and confirm make fate-vp9
and tests/checkasm/checkasm still work after this patch?)
This commit is contained in:
Ronald S. Bultje 2015-10-06 08:38:17 -04:00
parent b3b6665c60
commit ce78729033
1 changed files with 5 additions and 15 deletions
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20
libavcodec/x86/vp9intrapred_16bpp.asm
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@ -601,7 +601,7 @@ cglobal vp9_ipred_tm_16x16_12, 4, 4, 8, dst, stride, l, a
jmp mangle(private_prefix %+ _ %+ vp9_ipred_tm_16x16_10 %+ SUFFIX).body
INIT_XMM sse2
cglobal vp9_ipred_tm_32x32_10, 4, 4, 10, 32 * ARCH_X86_32, dst, stride, l, a
cglobal vp9_ipred_tm_32x32_10, 4, 4, 10, 32 * -ARCH_X86_32, dst, stride, l, a
mova m0, [pw_1023]
.body:
pxor m1, m1
@ -655,7 +655,7 @@ cglobal vp9_ipred_tm_32x32_10, 4, 4, 10, 32 * ARCH_X86_32, dst, stride, l, a
jge .loop
RET
cglobal vp9_ipred_tm_32x32_12, 4, 4, 10, 32 * ARCH_X86_32, dst, stride, l, a
cglobal vp9_ipred_tm_32x32_12, 4, 4, 10, 32 * -ARCH_X86_32, dst, stride, l, a
mova m0, [pw_4095]
jmp mangle(private_prefix %+ _ %+ vp9_ipred_tm_32x32_10 %+ SUFFIX).body
@ -945,7 +945,7 @@ cglobal vp9_ipred_dr_16x16_16, 4, 4, 7, dst, stride, l, a
RET
cglobal vp9_ipred_dr_32x32_16, 4, 5, 10 + notcpuflag(ssse3), \
%1 * ARCH_X86_32 * mmsize, dst, stride, l, a
%1 * ARCH_X86_32 * -mmsize, dst, stride, l, a
mova m0, [aq+mmsize*3] ; a[24-31]
movu m1, [aq+mmsize*3-2] ; a[23-30]
psrldq m2, m0, 2 ; a[25-31].
@ -1634,13 +1634,8 @@ cglobal vp9_ipred_hu_16x16_16, 3, 4, 6 + notcpuflag(ssse3), dst, stride, l, a
jg .loop
RET
%if ARCH_X86_64 || HAVE_ALIGNED_STACK
cglobal vp9_ipred_hu_32x32_16, 3, 7, 10 + notcpuflag(ssse3), \
%1 * mmsize * ARCH_X86_32, dst, stride, l, a
%else
cglobal vp9_ipred_hu_32x32_16, 3, 6, 10 + notcpuflag(ssse3), \
%1 * mmsize * ARCH_X86_32, dst, stride, l, a
%endif
%1 * -mmsize * ARCH_X86_32, dst, stride, l, a
mova m2, [lq+mmsize*0+0]
movu m1, [lq+mmsize*0+2]
movu m0, [lq+mmsize*0+4]
@ -1671,12 +1666,7 @@ cglobal vp9_ipred_hu_32x32_16, 3, 6, 10 + notcpuflag(ssse3), \
SBUTTERFLY wd, 7, 6, 0
pshufd m1, m1, q3333
UNSCRATCH 0, 9, rsp+1*mmsize
%if ARCH_X86_64 || HAVE_ALIGNED_STACK
DEFINE_ARGS dst, stride, cnt, stride3, stride4, stride20, stride28
%else
DEFINE_ARGS dst, stride, stride3, stride4, stride20, stride28
%define cntd dword r0m
%endif
lea stride3q, [strideq*3]
lea stride4q, [strideq*4]
lea stride28q, [stride4q*8]
@ -1902,7 +1892,7 @@ cglobal vp9_ipred_hd_16x16_16, 4, 4, 8, dst, stride, l, a
RET
cglobal vp9_ipred_hd_32x32_16, 4, 4 + 3 * ARCH_X86_64, 14, \
10 * mmsize * ARCH_X86_32, dst, stride, l, a
10 * -mmsize * ARCH_X86_32, dst, stride, l, a
mova m2, [lq+mmsize*0+0]
movu m1, [lq+mmsize*0+2]
movu m0, [lq+mmsize*0+4]