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/* for VFP */
#define VMRS(fp, cpu) WORD $(0xeef00a10 | (fp)<<16 | (cpu)<<12) /* FP → arm */
#define VMSR(cpu, fp) WORD $(0xeee00a10 | (fp)<<16 | (cpu)<<12) /* arm → FP */
#define Fpscr 1
TEXT tramp(SB), 1, $0
MOVW fn+4(FP), R1 /* func to exec */
MOVW arg+8(FP), R2 /* argument */
SUB $8, R0 /* new stack */
MOVW R0, SP
MOVW R2, R0
BL (R1)
MOVW $0, R0
BL _exits(SB)
RET
TEXT vstack(SB), 1, $0
MOVW ustack(SB), SP
BL exectramp(SB)
RET
TEXT FPsave(SB), 1, $0
VMRS(Fpscr, 1)
MOVW R1, 0(R0)
RET
TEXT FPrestore(SB), 1, $0
MOVW (R0), R0
VMSR(0, Fpscr)
RET
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