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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; \
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