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| author | WANG Xuerui <git@xen0n.name> | 2023-06-29 15:58:43 +0300 |
|---|---|---|
| committer | Huacai Chen <chenhuacai@loongson.cn> | 2023-06-29 15:58:43 +0300 |
| commit | 38bb46f94544c5385bc35aa2bfc776dcf53a7b5d (patch) | |
| tree | a9874bea832ce2e5665ce63c8214d55bb938fde0 /arch | |
| parent | 24da0249d950bbf97a8513daf414b48548b8bbe9 (diff) | |
| download | linux-38bb46f94544c5385bc35aa2bfc776dcf53a7b5d.tar.xz | |
LoongArch: Prepare for assemblers with proper FCSR class support
The GNU assembler (as of 2.40) mis-treats FCSR operands as GPRs, but
the LLVM IAS does not. Probe for this and refer to FCSRs as "$fcsrNN"
if support is present.
Signed-off-by: WANG Xuerui <git@xen0n.name>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/loongarch/Kconfig | 3 | ||||
| -rw-r--r-- | arch/loongarch/include/asm/fpregdef.h | 7 | ||||
| -rw-r--r-- | arch/loongarch/include/asm/loongarch.h | 9 |
3 files changed, 18 insertions, 1 deletions
diff --git a/arch/loongarch/Kconfig b/arch/loongarch/Kconfig index d38b066fc931..86fdd7a42cd1 100644 --- a/arch/loongarch/Kconfig +++ b/arch/loongarch/Kconfig @@ -241,6 +241,9 @@ config SCHED_OMIT_FRAME_POINTER config AS_HAS_EXPLICIT_RELOCS def_bool $(as-instr,x:pcalau12i \$t0$(comma)%pc_hi20(x)) +config AS_HAS_FCSR_CLASS + def_bool $(as-instr,movfcsr2gr \$t0$(comma)\$fcsr0) + menu "Kernel type and options" source "kernel/Kconfig.hz" diff --git a/arch/loongarch/include/asm/fpregdef.h b/arch/loongarch/include/asm/fpregdef.h index b6be527831dd..e56610ae8592 100644 --- a/arch/loongarch/include/asm/fpregdef.h +++ b/arch/loongarch/include/asm/fpregdef.h @@ -40,6 +40,7 @@ #define fs6 $f30 #define fs7 $f31 +#ifndef CONFIG_AS_HAS_FCSR_CLASS /* * Current binutils expects *GPRs* at FCSR position for the FCSR * operation instructions, so define aliases for those used. @@ -48,5 +49,11 @@ #define fcsr1 $r1 #define fcsr2 $r2 #define fcsr3 $r3 +#else +#define fcsr0 $fcsr0 +#define fcsr1 $fcsr1 +#define fcsr2 $fcsr2 +#define fcsr3 $fcsr3 +#endif #endif /* _ASM_FPREGDEF_H */ diff --git a/arch/loongarch/include/asm/loongarch.h b/arch/loongarch/include/asm/loongarch.h index 35e8a52fea11..e90c222374d0 100644 --- a/arch/loongarch/include/asm/loongarch.h +++ b/arch/loongarch/include/asm/loongarch.h @@ -1441,11 +1441,18 @@ __BUILD_CSR_OP(tlbidx) #define EXCCODE_INT_START 64 #define EXCCODE_INT_END (EXCCODE_INT_START + EXCCODE_INT_NUM - 1) -/* FPU register names */ +/* FPU Status Register Names */ +#ifndef CONFIG_AS_HAS_FCSR_CLASS #define LOONGARCH_FCSR0 $r0 #define LOONGARCH_FCSR1 $r1 #define LOONGARCH_FCSR2 $r2 #define LOONGARCH_FCSR3 $r3 +#else +#define LOONGARCH_FCSR0 $fcsr0 +#define LOONGARCH_FCSR1 $fcsr1 +#define LOONGARCH_FCSR2 $fcsr2 +#define LOONGARCH_FCSR3 $fcsr3 +#endif /* FPU Status Register Values */ #define FPU_CSR_RSVD 0xe0e0fce0 |