[PATCH] [inline assembly] fix pcm_dmix_i386.h assembly chunk interfaces
Takashi Iwai
tiwai at suse.de
Mon Apr 27 15:47:02 CEST 2020
On Mon, 27 Apr 2020 09:36:04 +0200,
frederic.recoules at univ-grenoble-alpes.fr wrote:
>
> From: Frédéric Recoules <frederic.recoules at 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 at orange.fr>
When I apply this and build for i386 with gcc9, I got the following
error:
pcm_dmix_i386.h: In function 'mix_areas_16_mmx':
pcm_dmix_i386.h:180:2: error: unknown register name 'mm1' in 'asm'
180 | __asm__ __volatile__ (
| ^~~~~~~
pcm_dmix_i386.h:180:2: error: unknown register name 'mm0' in 'asm'
In file included from pcm_dmix_i386.c:31,
from pcm_dmix.c:144:
pcm_dmix_i386.h: In function 'remix_areas_16_mmx':
pcm_dmix_i386.h:180:2: error: unknown register name 'mm1' in 'asm'
180 | __asm__ __volatile__ (
| ^~~~~~~
....
Could you check those errors?
thanks,
Takashi
> ---
> 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"
> );
> }
> --
> 2.17.1
>
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