diff mbox series

[v2,1/4] riscv: Add X register names to gpr-nums

Message ID 20220831172500.752195-2-ajones@ventanamicro.com (mailing list archive)
State New, archived
Headers show
Series riscv: Introduce support for defining instructions | expand

Commit Message

Andrew Jones Aug. 31, 2022, 5:24 p.m. UTC 
When encoding instructions it's sometimes necessary to set a
register field to a precise number. This is easiest to do using
the x<num> naming.

Signed-off-by: Andrew Jones <ajones@ventanamicro.com>
Reviewed-by: Anup Patel <anup@brainfault.org>
---
 arch/riscv/include/asm/gpr-num.h | 8 ++++++++
 1 file changed, 8 insertions(+)

Comments

Anup Patel Sept. 2, 2022, 6:51 a.m. UTC | #1 
On Wed, Aug 31, 2022 at 10:55 PM Andrew Jones <ajones@ventanamicro.com> wrote:
>
> When encoding instructions it's sometimes necessary to set a
> register field to a precise number. This is easiest to do using
> the x<num> naming.
>
> Signed-off-by: Andrew Jones <ajones@ventanamicro.com>
> Reviewed-by: Anup Patel <anup@brainfault.org>

I have queued this patch for Linux-6.1

Thanks,
Anup

> ---
>  arch/riscv/include/asm/gpr-num.h | 8 ++++++++
>  1 file changed, 8 insertions(+)
>
> diff --git a/arch/riscv/include/asm/gpr-num.h b/arch/riscv/include/asm/gpr-num.h
> index dfee2829fc7c..efeb5edf8a3a 100644
> --- a/arch/riscv/include/asm/gpr-num.h
> +++ b/arch/riscv/include/asm/gpr-num.h
> @@ -3,6 +3,11 @@
>  #define __ASM_GPR_NUM_H
>
>  #ifdef __ASSEMBLY__
> +
> +       .irp    num,0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31
> +       .equ    .L__gpr_num_x\num, \num
> +       .endr
> +
>         .equ    .L__gpr_num_zero,       0
>         .equ    .L__gpr_num_ra,         1
>         .equ    .L__gpr_num_sp,         2
> @@ -39,6 +44,9 @@
>  #else /* __ASSEMBLY__ */
>
>  #define __DEFINE_ASM_GPR_NUMS                                  \
> +"      .irp    num,0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31\n" \
> +"      .equ    .L__gpr_num_x\\num, \\num\n"                    \
> +"      .endr\n"                                                \
>  "      .equ    .L__gpr_num_zero,       0\n"                    \
>  "      .equ    .L__gpr_num_ra,         1\n"                    \
>  "      .equ    .L__gpr_num_sp,         2\n"                    \
> --
> 2.37.2
>
diff mbox series

Patch

diff --git a/arch/riscv/include/asm/gpr-num.h b/arch/riscv/include/asm/gpr-num.h
index dfee2829fc7c..efeb5edf8a3a 100644
--- a/arch/riscv/include/asm/gpr-num.h
+++ b/arch/riscv/include/asm/gpr-num.h
@@ -3,6 +3,11 @@ 
 #define __ASM_GPR_NUM_H
 
 #ifdef __ASSEMBLY__
+
+	.irp	num,0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31
+	.equ	.L__gpr_num_x\num, \num
+	.endr
+
 	.equ	.L__gpr_num_zero,	0
 	.equ	.L__gpr_num_ra,		1
 	.equ	.L__gpr_num_sp,		2
@@ -39,6 +44,9 @@ 
 #else /* __ASSEMBLY__ */
 
 #define __DEFINE_ASM_GPR_NUMS					\
+"	.irp	num,0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31\n" \
+"	.equ	.L__gpr_num_x\\num, \\num\n"			\
+"	.endr\n"						\
 "	.equ	.L__gpr_num_zero,	0\n"			\
 "	.equ	.L__gpr_num_ra,		1\n"			\
 "	.equ	.L__gpr_num_sp,		2\n"			\