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authorLeo <thinkabit.ukim@gmail.com>2020-03-27 05:43:51 -0300
committerLeo <thinkabit.ukim@gmail.com>2020-03-29 15:55:31 +0000
commit7453fb90a39e6cfc2dc52b0ccf9c5c3389ac5d26 (patch)
treebf9235f9579a385523144f956fca181a31726724 /community/libmad/Provide-Thumb-2-alternative-code-for-MAD_F_MLN.patch
parent3d0b17a8c708cccc63661f7864632e65431dab8f (diff)
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community/libmad: move from main
Diffstat (limited to 'community/libmad/Provide-Thumb-2-alternative-code-for-MAD_F_MLN.patch')
-rw-r--r--community/libmad/Provide-Thumb-2-alternative-code-for-MAD_F_MLN.patch34
1 files changed, 34 insertions, 0 deletions
diff --git a/community/libmad/Provide-Thumb-2-alternative-code-for-MAD_F_MLN.patch b/community/libmad/Provide-Thumb-2-alternative-code-for-MAD_F_MLN.patch
new file mode 100644
index 0000000000..46415107d2
--- /dev/null
+++ b/community/libmad/Provide-Thumb-2-alternative-code-for-MAD_F_MLN.patch
@@ -0,0 +1,34 @@
+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; \