From: Frédéric Recoules frederic.recoules@orange.fr
- initialize mm1 with 0s; - add mm0 and mm1 in the clobber list if the compiler is aware of the mmx technology; - otherwise, add the mmx aliased x87 floating point register in the clobbers.
Note: produce exactly the same binary output except for mm1 initialization implying address shifts.
Signed-off-by: Frédéric Recoules frederic.recoules@orange.fr --- src/pcm/pcm_dmix_i386.h | 9 ++++++++- src/pcm/pcm_dmix_x86_64.h | 9 ++++++++- 2 files changed, 16 insertions(+), 2 deletions(-)
diff --git a/src/pcm/pcm_dmix_i386.h b/src/pcm/pcm_dmix_i386.h index 3ea0737d..d9bf8f50 100644 --- a/src/pcm/pcm_dmix_i386.h +++ b/src/pcm/pcm_dmix_i386.h @@ -173,8 +173,9 @@ static void MIX_AREAS_16_MMX(unsigned int size,
"\tmovl %%ebx, %[old_ebx]\n" /* ebx is GOT pointer (-fPIC) */ /* - * initialization, load ESI, EDI, EBX registers + * initialization, load ESI, EDI, EBX registers and clear MM1 */ + "\tpxor %%mm1, %%mm1\n" "\tmovl %[dst], %%edi\n" "\tmovl %[src], %%esi\n" "\tmovl %[sum], %%ebx\n" @@ -237,6 +238,12 @@ static void MIX_AREAS_16_MMX(unsigned int size, [dst_step] "m" (dst_step), [src_step] "m" (src_step), [sum_step] "m" (sum_step) : "esi", "edi", "edx", "ecx", "eax", "memory", "cc" +# ifdef HAVE_MMX + , "mm0", "mm1" +# else + , "st", "st(1)", "st(2)", "st(3)", + "st(4)", "st(5)", "st(6)", "st(7)" +# endif ); }
diff --git a/src/pcm/pcm_dmix_x86_64.h b/src/pcm/pcm_dmix_x86_64.h index 7f711547..8ad1b2a0 100644 --- a/src/pcm/pcm_dmix_x86_64.h +++ b/src/pcm/pcm_dmix_x86_64.h @@ -50,8 +50,9 @@ static void MIX_AREAS_16(unsigned int size,
"\tmovq %%rbx, %[old_rbx]\n" /* - * initialization, load RSI, RDI, RBX registers + * initialization, load RSI, RDI, RBX registers and clear MM1 */ + "\tpxor %%mm1, %%mm1\n" "\tmovq %[dst], %%rdi\n" "\tmovq %[src], %%rsi\n" "\tmovq %[sum], %%rbx\n" @@ -119,6 +120,12 @@ static void MIX_AREAS_16(unsigned int size, [dst_step] "m" (dst_step), [src_step] "m" (src_step), [sum_step] "m" (sum_step) : "rsi", "rdi", "edx", "ecx", "eax", "memory", "cc" +# ifdef HAVE_MMX + , "mm0", "mm1" +# else + , "st", "st(1)", "st(2)", "st(3)", + "st(4)", "st(5)", "st(6)", "st(7)" +# endif ); }
-- 2.17.1