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Use $at as temporary register for mips/loongson CPUCFG read 

Some compilers (namely LLVM) are not happy with clobbering
registers in inline assembly.
Use $at as temporary register and explicitly use noat
hint.

Signed-off-by: Jiaxun Yang <jiaxun.yang@flygoat.com>
This commit is contained in:
Jiaxun Yang 2022-07-31 18:42:51 +01:00
parent 19d4f90c44
commit b633eb79f2
1 changed files with 8 additions and 5 deletions
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13
driver/others/dynamic_mips64.c
View File

@ -97,13 +97,16 @@ static gotoblas_t *force_coretype(char *coretype) {
static gotoblas_t *get_coretype_from_cpucfg(void) { static gotoblas_t *get_coretype_from_cpucfg(void) {
int flag = 0; int flag = 0;
__asm__ volatile( __asm__ volatile(
".set push \n\t"
".set noat \n\t"
".insn \n\t" ".insn \n\t"
"dli $8, 0x01 \n\t" "dli $1, 0x01 \n\t"
".word (0xc9084918) \n\t" ".word (0xc8080118) \n\t"
"usw $9, 0x00(%0) \n\t" "move %0, $1 \n\t"
".set pop \n\t"
: "=r"(flag)
:
: :
: "r"(&flag)
: "memory"
); );
if (flag & MSA_MASK) if (flag & MSA_MASK)
return (&gotoblas_LOONGSON3R4); return (&gotoblas_LOONGSON3R4);