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| Fixes Thumb2-related build failure
|
| Patch below comes from the Debian libmad package.
|
| Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
|
| From: Dave Martin
| Subject: "rsc" doesnt exist anymore in thumb2
|
| diff --git a/fixed.h b/fixed.h
| index 4b58abf..ba4bc26 100644
| --- a/fixed.h
| +++ b/fixed.h
| @@ -275,12 +275,25 @@ mad_fixed_t mad_f_mul_inline(mad_fixed_t x, mad_fixed_t y)
| : "+r" (lo), "+r" (hi) \
| : "%r" (x), "r" (y))
|
| +#ifdef __thumb__
| +/* In Thumb-2, the RSB-immediate instruction is only allowed with a zero
| + operand. If needed this code can also support Thumb-1
| + (simply append "s" to the end of the second two instructions). */
| +# define MAD_F_MLN(hi, lo) \
| + asm ("rsbs %0, %0, #0\n\t" \
| + "sbc %1, %1, %1\n\t" \
| + "sub %1, %1, %2" \
| + : "+&r" (lo), "=&r" (hi) \
| + : "r" (hi) \
| + : "cc")
| +#else /* ! __thumb__ */
| # define MAD_F_MLN(hi, lo) \
| asm ("rsbs %0, %2, #0\n\t" \
| "rsc %1, %3, #0" \
| - : "=r" (lo), "=r" (hi) \
| + : "=&r" (lo), "=r" (hi) \
| : "0" (lo), "1" (hi) \
| : "cc")
| +#endif /* __thumb__ */
|
| # define mad_f_scale64(hi, lo) \
| ({ mad_fixed_t __result; \
|
|
