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MIPS: mipsregs: Parse fp and sp register by name in parse_r

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parse_r helper is used to parse register number from oprand,
it only handles oprand which use number to refer register before.

However compiler may use $gp and $sp to reference register 29 and
30. Handle this situation by adding relevant match name.

Fixes compilation error:
{standard input}: Assembler messages:
{standard input}:1937: Error: Unable to parse register name $fp

Signed-off-by: Jiaxun Yang <jiaxun.yang@flygoat.com>
Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
This commit is contained in:
Jiaxun Yang 2023-04-09 11:43:06 +01:00 committed by Thomas Bogendoerfer
parent 188942f05c
commit af43e871c9
1 changed files with 5 additions and 2 deletions
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7
arch/mips/include/asm/mipsregs.h
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@ -1422,11 +1422,13 @@ static inline int mm_insn_16bit(u16 insn)
*/
/* Match an individual register number and assign to \var */
#define _IFC_REG(n) \
".ifc \\r, $" #n "\n\t" \
#define _IFC_REG_NAME(name, n) \
".ifc \\r, $" #name "\n\t" \
"\\var = " #n "\n\t" \
".endif\n\t"
#define _IFC_REG(n) _IFC_REG_NAME(n, n)
#define _ASM_SET_PARSE_R \
".macro parse_r var r\n\t" \
"\\var = -1\n\t" \
@ -1438,6 +1440,7 @@ static inline int mm_insn_16bit(u16 insn)
_IFC_REG(20) _IFC_REG(21) _IFC_REG(22) _IFC_REG(23) \
_IFC_REG(24) _IFC_REG(25) _IFC_REG(26) _IFC_REG(27) \
_IFC_REG(28) _IFC_REG(29) _IFC_REG(30) _IFC_REG(31) \
_IFC_REG_NAME(sp, 29) _IFC_REG_NAME(fp, 30) \
".iflt \\var\n\t" \
".error \"Unable to parse register name \\r\"\n\t" \
".endif\n\t" \