From 282321b3a43577532abc54dafa60d0d6cfc74fd2 Mon Sep 17 00:00:00 2001 From: Andrew Waterman Date: Mon, 20 Feb 2017 22:28:37 -0800 Subject: Use gcc csr register constraint --- encoding.h | 20 ++++---------------- 1 file changed, 4 insertions(+), 16 deletions(-) diff --git a/encoding.h b/encoding.h index 0beea49..93cf5cf 100644 --- a/encoding.h +++ b/encoding.h @@ -184,30 +184,18 @@ __tmp; }) #define write_csr(reg, val) ({ \ - if (__builtin_constant_p(val) && (unsigned long)(val) < 32) \ - asm volatile ("csrw " #reg ", %0" :: "i"(val)); \ - else \ - asm volatile ("csrw " #reg ", %0" :: "r"(val)); }) + asm volatile ("csrw " #reg ", %0" :: "rK"(val)); }) #define swap_csr(reg, val) ({ unsigned long __tmp; \ - if (__builtin_constant_p(val) && (unsigned long)(val) < 32) \ - asm volatile ("csrrw %0, " #reg ", %1" : "=r"(__tmp) : "i"(val)); \ - else \ - asm volatile ("csrrw %0, " #reg ", %1" : "=r"(__tmp) : "r"(val)); \ + asm volatile ("csrrw %0, " #reg ", %1" : "=r"(__tmp) : "rK"(val)); \ __tmp; }) #define set_csr(reg, bit) ({ unsigned long __tmp; \ - if (__builtin_constant_p(bit) && (unsigned long)(bit) < 32) \ - asm volatile ("csrrs %0, " #reg ", %1" : "=r"(__tmp) : "i"(bit)); \ - else \ - asm volatile ("csrrs %0, " #reg ", %1" : "=r"(__tmp) : "r"(bit)); \ + asm volatile ("csrrs %0, " #reg ", %1" : "=r"(__tmp) : "rK"(bit)); \ __tmp; }) #define clear_csr(reg, bit) ({ unsigned long __tmp; \ - if (__builtin_constant_p(bit) && (unsigned long)(bit) < 32) \ - asm volatile ("csrrc %0, " #reg ", %1" : "=r"(__tmp) : "i"(bit)); \ - else \ - asm volatile ("csrrc %0, " #reg ", %1" : "=r"(__tmp) : "r"(bit)); \ + asm volatile ("csrrc %0, " #reg ", %1" : "=r"(__tmp) : "rK"(bit)); \ __tmp; }) #define rdtime() read_csr(time) -- cgit v1.1