Staging
v0.5.1
v0.5.1
https://github.com/torvalds/linux
Revision 0dfa1c12f300d06f95d861d2718ef198e37473a6 authored by James Hogan on 20 May 2016, 22:28:37 UTC, committed by Ralf Baechle on 28 May 2016, 10:35:09 UTC
To allow simplification of macros which use inline assembly to
explicitly encode instructions, add a few simple abstractions to
mipsregs.h which expand to specific microMIPS or normal MIPS encodings
depending on what type of kernel is being built:
_ASM_INSN_IF_MIPS(_enc) : Emit a 32bit MIPS instruction if microMIPS is
not enabled.
_ASM_INSN32_IF_MM(_enc) : Emit a 32bit microMIPS instruction if enabled.
_ASM_INSN16_IF_MM(_enc) : Emit a 16bit microMIPS instruction if enabled.
The macros can be used one after another since the MIPS / microMIPS
macros are mutually exclusive, for example:
__asm__ __volatile__(
".set push\n\t"
".set noat\n\t"
"# mfgc0 $1, $%1, %2\n\t"
_ASM_INSN_IF_MIPS(0x40610000 | %1 << 11 | %2)
_ASM_INSN32_IF_MM(0x002004fc | %1 << 16 | %2 << 11)
"move %0, $1\n\t"
".set pop"
: "=r" (__res)
: "i" (source), "i" (sel));
Signed-off-by: James Hogan <james.hogan@imgtec.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/13310/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
1 parent 4939788
Tip revision: 0dfa1c12f300d06f95d861d2718ef198e37473a6 authored by James Hogan on 20 May 2016, 22:28:37 UTC
MIPS: Add inline asm encoding helpers
MIPS: Add inline asm encoding helpers
Tip revision: 0dfa1c1
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