From: Frédéric Recoules frederic.recoules@orange.fr
Main changes are: - move 'size' and 'old_ebx' to the output list since they are clobbered - add the "memory" keyword since input pointers are dereferenced - add mmx registers in the clobber list and add an initialization for mm1 - add ebx in clobbers via a set of macro when GCC is newer than 5.0 (it will work for other compilers or non-PIC mode too)
Minor changes are: - keep consistent the token numbering in the template - remove the manual save/restore ebx when it is in the clobber list - allows 'dst_step', 'src_step' and 'sum_step' to be given by immediates - allows 'size' to be given by register (e.g. ebp) - add "cc" keyword since the eflag register is clobbered
Signed-off-by: Frédéric Recoules frederic.recoules@orange.fr --- src/pcm/pcm_dmix_i386.h | 168 ++++++++++++++++++++++------------------ 1 file changed, 93 insertions(+), 75 deletions(-)
diff --git a/src/pcm/pcm_dmix_i386.h b/src/pcm/pcm_dmix_i386.h index 2778cb1d..af2f4630 100644 --- a/src/pcm/pcm_dmix_i386.h +++ b/src/pcm/pcm_dmix_i386.h @@ -26,6 +26,13 @@ * */
+#define COMMA , +#if __GNUC__ < 5 && defined(__PIC__) +# define GCC_PIC_SWITCH(before,after) before +#else +# define GCC_PIC_SWITCH(before,after) after +#endif + /* * for plain i386 */ @@ -47,13 +54,14 @@ static void MIX_AREAS_16(unsigned int size, __asm__ __volatile__ ( "\n"
- "\tmovl %%ebx, %7\n" /* ebx is GOT pointer (-fPIC) */ + /* ebx is GOT pointer (-fPIC) */ + GCC_PIC_SWITCH("\tmovl %%ebx, %1\n",) /* * initialization, load ESI, EDI, EBX registers */ - "\tmovl %1, %%edi\n" - "\tmovl %2, %%esi\n" - "\tmovl %3, %%ebx\n" + "\tmovl %2, %%edi\n" + "\tmovl %3, %%esi\n" + "\tmovl %4, %%ebx\n" "\tcmpl $0, %0\n" "\tjnz 2f\n" "\tjmp 7f\n" @@ -64,9 +72,9 @@ static void MIX_AREAS_16(unsigned int size, */ "\t.p2align 4,,15\n" "1:" - "\tadd %4, %%edi\n" - "\tadd %5, %%esi\n" - "\tadd %6, %%ebx\n" + "\tadd %5, %%edi\n" + "\tadd %6, %%esi\n" + "\tadd %7, %%ebx\n"
/* * sample = *src; @@ -138,15 +146,16 @@ static void MIX_AREAS_16(unsigned int size, "\tjnz 4b\n" "\tdecl %0\n" "\tjnz 1b\n" - - "7:" - "\tmovl %7, %%ebx\n" /* ebx is GOT pointer (-fPIC) */
- : /* no output regs */ - : "m" (size), "m" (dst), "m" (src), - "m" (sum), "m" (dst_step), "m" (src_step), - "m" (sum_step), "m" (old_ebx) - : "esi", "edi", "edx", "ecx", "eax" + "7:" + /* ebx is GOT pointer (-fPIC) */ + GCC_PIC_SWITCH("\tmovl %1, %%ebx\n",) + + : "+&rm" (size), GCC_PIC_SWITCH("=m","=X") (old_ebx) + : "m" (dst), "m" (src), "m" (sum), + "im" (dst_step), "im" (src_step), "im" (sum_step) + : "esi", "edi", "edx", "ecx", GCC_PIC_SWITCH(,"ebx"COMMA) "eax", + "memory", "cc" ); }
@@ -171,22 +180,24 @@ static void MIX_AREAS_16_MMX(unsigned int size, __asm__ __volatile__ ( "\n"
- "\tmovl %%ebx, %7\n" /* ebx is GOT pointer (-fPIC) */ + /* ebx is GOT pointer (-fPIC) */ + GCC_PIC_SWITCH("\tmovl %%ebx, %1\n",) /* - * initialization, load ESI, EDI, EBX registers + * initialization, load ESI, EDI, EBX registers, clear MM1 */ - "\tmovl %1, %%edi\n" - "\tmovl %2, %%esi\n" - "\tmovl %3, %%ebx\n" + "\tpxor %%mm1, %%mm1\n" + "\tmovl %2, %%edi\n" + "\tmovl %3, %%esi\n" + "\tmovl %4, %%ebx\n" "\tcmpl $0, %0\n" "\tjnz 2f\n" "\tjmp 5f\n"
"\t.p2align 4,,15\n" "1:" - "\tadd %4, %%edi\n" - "\tadd %5, %%esi\n" - "\tadd %6, %%ebx\n" + "\tadd %5, %%edi\n" + "\tadd %6, %%esi\n" + "\tadd %7, %%ebx\n"
"2:" /* @@ -230,13 +241,14 @@ static void MIX_AREAS_16_MMX(unsigned int size, "\tjnz 1b\n" "\temms\n" "5:" - "\tmovl %7, %%ebx\n" /* ebx is GOT pointer (-fPIC) */ - - : /* no output regs */ - : "m" (size), "m" (dst), "m" (src), - "m" (sum), "m" (dst_step), "m" (src_step), - "m" (sum_step), "m" (old_ebx) - : "esi", "edi", "edx", "ecx", "eax" + /* ebx is GOT pointer (-fPIC) */ + GCC_PIC_SWITCH("\tmovl %1, %%ebx\n",) + + : "+&rm" (size), GCC_PIC_SWITCH("=m","=X") (old_ebx) + : "m" (dst), "m" (src), "m" (sum), + "im" (dst_step), "im" (src_step), "im" (sum_step) + : "esi", "edi", "edx", "ecx", GCC_PIC_SWITCH(,"ebx"COMMA) "eax", + "mm0", "mm1", "memory", "cc" ); }
@@ -261,13 +273,14 @@ static void MIX_AREAS_32(unsigned int size, __asm__ __volatile__ ( "\n"
- "\tmovl %%ebx, %7\n" /* ebx is GOT pointer (-fPIC) */ + /* ebx is GOT pointer (-fPIC) */ + GCC_PIC_SWITCH("\tmovl %%ebx, %1\n",) /* * initialization, load ESI, EDI, EBX registers */ - "\tmovl %1, %%edi\n" - "\tmovl %2, %%esi\n" - "\tmovl %3, %%ebx\n" + "\tmovl %2, %%edi\n" + "\tmovl %3, %%esi\n" + "\tmovl %4, %%ebx\n" "\tcmpl $0, %0\n" "\tjnz 1f\n" "\tjmp 6f\n" @@ -337,19 +350,20 @@ static void MIX_AREAS_32(unsigned int size, */ "\tdecl %0\n" "\tjz 6f\n" - "\tadd %4, %%edi\n" - "\tadd %5, %%esi\n" - "\tadd %6, %%ebx\n" + "\tadd %5, %%edi\n" + "\tadd %6, %%esi\n" + "\tadd %7, %%ebx\n" "\tjmp 1b\n" - - "6:" - "\tmovl %7, %%ebx\n" /* ebx is GOT pointer (-fPIC) */
- : /* no output regs */ - : "m" (size), "m" (dst), "m" (src), - "m" (sum), "m" (dst_step), "m" (src_step), - "m" (sum_step), "m" (old_ebx) - : "esi", "edi", "edx", "ecx", "eax" + "6:" + /* ebx is GOT pointer (-fPIC) */ + GCC_PIC_SWITCH("\tmovl %1, %%ebx\n",) + + : "+&rm" (size), GCC_PIC_SWITCH("=m","=X") (old_ebx) + : "m" (dst), "m" (src), "m" (sum), + "im" (dst_step), "im" (src_step), "im" (sum_step) + : "esi", "edi", "edx", "ecx", GCC_PIC_SWITCH(,"ebx"COMMA) "eax", + "memory", "cc" ); }
@@ -374,13 +388,14 @@ static void MIX_AREAS_24(unsigned int size, __asm__ __volatile__ ( "\n"
- "\tmovl %%ebx, %7\n" /* ebx is GOT pointer (-fPIC) */ + /* ebx is GOT pointer (-fPIC) */ + GCC_PIC_SWITCH("\tmovl %%ebx, %1\n",) /* * initialization, load ESI, EDI, EBX registers */ - "\tmovl %1, %%edi\n" - "\tmovl %2, %%esi\n" - "\tmovl %3, %%ebx\n" + "\tmovl %2, %%edi\n" + "\tmovl %3, %%esi\n" + "\tmovl %4, %%ebx\n" "\tcmpl $0, %0\n" "\tjnz 1f\n" "\tjmp 6f\n" @@ -443,19 +458,20 @@ static void MIX_AREAS_24(unsigned int size, */ "\tdecl %0\n" "\tjz 6f\n" - "\tadd %4, %%edi\n" - "\tadd %5, %%esi\n" - "\tadd %6, %%ebx\n" + "\tadd %5, %%edi\n" + "\tadd %6, %%esi\n" + "\tadd %7, %%ebx\n" "\tjmp 1b\n" - - "6:" - "\tmovl %7, %%ebx\n" /* ebx is GOT pointer (-fPIC) */
- : /* no output regs */ - : "m" (size), "m" (dst), "m" (src), - "m" (sum), "m" (dst_step), "m" (src_step), - "m" (sum_step), "m" (old_ebx) - : "esi", "edi", "edx", "ecx", "eax" + "6:" + /* ebx is GOT pointer (-fPIC) */ + GCC_PIC_SWITCH("\tmovl %1, %%ebx\n",) + + : "+&rm" (size), GCC_PIC_SWITCH("=m","=X") (old_ebx) + : "m" (dst), "m" (src), "m" (sum), + "im" (dst_step), "im" (src_step), "im" (sum_step) + : "esi", "edi", "edx", "ecx", GCC_PIC_SWITCH(,"ebx"COMMA) "eax", + "memory", "cc" ); }
@@ -480,13 +496,14 @@ static void MIX_AREAS_24_CMOV(unsigned int size, __asm__ __volatile__ ( "\n"
- "\tmovl %%ebx, %7\n" /* ebx is GOT pointer (-fPIC) */ + /* ebx is GOT pointer (-fPIC) */ + GCC_PIC_SWITCH("\tmovl %%ebx, %1\n",) /* * initialization, load ESI, EDI, EBX registers */ - "\tmovl %1, %%edi\n" - "\tmovl %2, %%esi\n" - "\tmovl %3, %%ebx\n" + "\tmovl %2, %%edi\n" + "\tmovl %3, %%esi\n" + "\tmovl %4, %%ebx\n" "\tcmpl $0, %0\n" "\tjz 6f\n"
@@ -541,19 +558,20 @@ static void MIX_AREAS_24_CMOV(unsigned int size, /* * while (size-- > 0) */ - "\tadd %4, %%edi\n" - "\tadd %5, %%esi\n" - "\tadd %6, %%ebx\n" + "\tadd %5, %%edi\n" + "\tadd %6, %%esi\n" + "\tadd %7, %%ebx\n" "\tdecl %0\n" "\tjnz 1b\n" - - "6:" - "\tmovl %7, %%ebx\n" /* ebx is GOT pointer (-fPIC) */
- : /* no output regs */ - : "m" (size), "m" (dst), "m" (src), - "m" (sum), "m" (dst_step), "m" (src_step), - "m" (sum_step), "m" (old_ebx) - : "esi", "edi", "edx", "ecx", "eax" + "6:" + /* ebx is GOT pointer (-fPIC) */ + GCC_PIC_SWITCH("\tmovl %1, %%ebx\n",) + + : "+&rm" (size), GCC_PIC_SWITCH("=m","=X") (old_ebx) + : "m" (dst), "m" (src), "m" (sum), + "im" (dst_step), "im" (src_step), "im" (sum_step) + : "esi", "edi", "edx", "ecx", GCC_PIC_SWITCH(,"ebx"COMMA) "eax", + "memory", "cc" ); }