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author | Richard Earnshaw <rearnsha@arm.com> | 2018-05-11 09:28:10 +0000 |
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committer | Richard Earnshaw <rearnsha@gcc.gnu.org> | 2018-05-11 09:28:10 +0000 |
commit | c40a8be80895679e8100e6ed32274bbed57d6543 (patch) | |
tree | 2f37b6ed2587c1087866f1f187be579bcb56c8b9 /gcc/config | |
parent | 1c9ee609dffac3f7d59ac9b8ca725d3cb9769b61 (diff) | |
download | gcc-c40a8be80895679e8100e6ed32274bbed57d6543.zip gcc-c40a8be80895679e8100e6ed32274bbed57d6543.tar.gz gcc-c40a8be80895679e8100e6ed32274bbed57d6543.tar.bz2 |
[arm] PR target/85606 prefer armv6s-m for armv6-m parts
When Arm introduced ARMv6-M there were two variants, ARMv6-M and
ARMv6S-M. The two differed only in support for the SVC instruction.
Later on SVC was then made a mandatory part of ARMv6-M and the
ARMv6S-M name was dropped. GCC and GAS, however still recognize both
names and at least some versions of GAS still distinguish between the
two.
To address this, this patch changes the architecture for the ARMv6-m
cortex parts (m0, m0plus, m1 and the variants will small multiply
units) to use the ARMv6S-M name in conjunction with the assembler.
This avoids problems with them rejecting code that was previously
accepted with older versions of GCC where we did not pass an explicit
architecture string through to the compiler when using -mcpu on the
command line.
PR target/85606
* config/arm/arm-cpus.in: Add comment that ARMv6-m and ARMv6S-m are now
equivalent.
(cortex-m0): Use armv6s-m isa.
(cortex-m0plus): Likewise.
(cortex-m1): Likewise.
(cortex-m0.small-multiply): Likewise.
(cortex-m0plus.small-multiply): Likewise.
(cortex-m1.small-multiply): Likewise.
From-SVN: r260157
Diffstat (limited to 'gcc/config')
-rw-r--r-- | gcc/config/arm/arm-cpus.in | 14 |
1 files changed, 8 insertions, 6 deletions
diff --git a/gcc/config/arm/arm-cpus.in b/gcc/config/arm/arm-cpus.in index cc08f5a..fce30e4 100644 --- a/gcc/config/arm/arm-cpus.in +++ b/gcc/config/arm/arm-cpus.in @@ -446,6 +446,8 @@ begin arch armv6-m isa ARMv6m end arch armv6-m +# This is now equivalent to armv6-m, but we keep it because some +# versions of GAS still distinguish between the two. begin arch armv6s-m tune for cortex-m1 base 6M @@ -1168,21 +1170,21 @@ end cpu arm1156t2f-s begin cpu cortex-m1 cname cortexm1 tune flags LDSCHED - architecture armv6-m + architecture armv6s-m costs v6m end cpu cortex-m1 begin cpu cortex-m0 cname cortexm0 tune flags LDSCHED - architecture armv6-m + architecture armv6s-m costs v6m end cpu cortex-m0 begin cpu cortex-m0plus cname cortexm0plus tune flags LDSCHED - architecture armv6-m + architecture armv6s-m costs v6m end cpu cortex-m0plus @@ -1192,7 +1194,7 @@ begin cpu cortex-m1.small-multiply cname cortexm1smallmultiply tune for cortex-m1 tune flags LDSCHED SMALLMUL - architecture armv6-m + architecture armv6s-m costs v6m end cpu cortex-m1.small-multiply @@ -1200,7 +1202,7 @@ begin cpu cortex-m0.small-multiply cname cortexm0smallmultiply tune for cortex-m0 tune flags LDSCHED SMALLMUL - architecture armv6-m + architecture armv6s-m costs v6m end cpu cortex-m0.small-multiply @@ -1208,7 +1210,7 @@ begin cpu cortex-m0plus.small-multiply cname cortexm0plussmallmultiply tune for cortex-m0plus tune flags LDSCHED SMALLMUL - architecture armv6-m + architecture armv6s-m costs v6m end cpu cortex-m0plus.small-multiply |