blob: eb3c13d6286568d0c7053a7500faffaa088e28e8 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
|
From: Aurelien Jarno <aurelien@aurel32.net>
Date: Sat, 3 Nov 2018 00:46:06 +0100
Subject: bn_mul.h: require at least ARMv6 to enable the ARM DSP code
Commit 16b1bd89326e "bn_mul.h: add ARM DSP optimized MULADDC code"
added some ARM DSP instructions that was assumed to always be available
when __ARM_FEATURE_DSP is defined to 1. Unfortunately it appears that
the ARMv5TE architecture (GCC flag -march=armv5te) supports the DSP
instructions, but only in Thumb mode and not in ARM mode, despite
defining __ARM_FEATURE_DSP in both cases.
This patch fixes the build issue by requiring at least ARMv6 in addition
to the DSP feature.
[jcowgill: Cherry-picked from upstream PR #2169]
---
include/mbedtls/bn_mul.h | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/include/mbedtls/bn_mul.h b/include/mbedtls/bn_mul.h
index c33bd8d..748975e 100644
--- a/include/mbedtls/bn_mul.h
+++ b/include/mbedtls/bn_mul.h
@@ -642,7 +642,8 @@
"r6", "r7", "r8", "r9", "cc" \
);
-#elif defined (__ARM_FEATURE_DSP) && (__ARM_FEATURE_DSP == 1)
+#elif (__ARM_ARCH >= 6) && \
+ defined (__ARM_FEATURE_DSP) && (__ARM_FEATURE_DSP == 1)
#define MULADDC_INIT \
asm(
|
