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arch/loongarch: add lsx/lasx SIMD dependency on fpu64

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Since the LoongArch64 introduction in commit [1], the Kconfig menus
allows selecting lsx and lasx SIMD options independently of the FPU
configuration.

When lsx or lasx SIMD is selected and FPU is "none", host-gcc-initial
is failing at configuration time, with error:

    --with-simd=lasx conflicts with --with-fpu=none

According to the gcc configuration script [2], lsx and lasx values
are valid only if FPU is 64.

This commit adds the missing "depends on BR2_LOONGARCH_FPU_64" for
BR2_LOONGARCH_SIMD_LSX and BR2_LOONGARCH_SIMD_LASX options.

Fixes:
https://autobuild.buildroot.org/results/d159645dab9206dd46f45e79241fc8a950bd0326/

[1] 54895db9c1
[2] https://gcc.gnu.org/git/?p=gcc.git;a=blob;f=gcc/config.gcc;h=a6f6efec4e103301225ef74c2d1159933d1c9cf8;hb=1757c320badc92c0628eafcd07d54585659692ed#l5163

Cc: Jiaxun Yang <jiaxun.yang@flygoat.com>
Reviewed-by: Jiaxun Yang <jiaxun.yang@flygoat.com>
Signed-off-by: Julien Olivain <ju.o@free.fr>
This commit is contained in:
Julien Olivain
2025-07-06 12:58:59 +02:00
parent accb006d9b
commit 279cd77865
1 changed files with 2 additions and 0 deletions
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arch/Config.in.loongarch
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@@ -59,12 +59,14 @@ config BR2_LOONGARCH_SIMD_NONE
config BR2_LOONGARCH_SIMD_LSX
bool "LSX"
depends on BR2_LOONGARCH_FPU_64
help
Enable generating instructions from the 128-bit LoongArch SIMD
Extension (LSX).
config BR2_LOONGARCH_SIMD_LASX
bool "LASX"
depends on BR2_LOONGARCH_FPU_64
help
Enable generating instructions from the 256-bit LoongArch
Advanced SIMD Extension (LASX) and the 128-bit LoongArch