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MIPS: XPA: Allow use of $0 (zero) to MTHC0

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Tweak __writex_32bit_c0_register() to allow the compiler to use $0 (the
zero register) as an input to the mthc0 instruction.

Signed-off-by: James Hogan <[email protected]>
Cc: Ralf Baechle <[email protected]>
Cc: [email protected]
Patchwork: https://patchwork.linux-mips.org/patch/17774/
This commit is contained in:
James Hogan 2017-11-22 11:30:31 +00:00
commit 3478ba9969
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1 changed files with 2 additions and 2 deletions
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4
arch/mips/include/asm/mipsregs.h
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@ -1537,10 +1537,10 @@ do { \
" .set push \n" \
" .set mips32r2 \n" \
_ASM_SET_XPA \
" mthc0 %0, $%1 \n" \
" mthc0 %z0, $%1 \n" \
" .set pop \n" \
: \
: "r" (value), "i" (register)); \
: "Jr" (value), "i" (register)); \
} while (0)
#define read_c0_index() __read_32bit_c0_register($0, 0)