error when using Conditional instruction - STM32f103

Maybe write an assembler function, instead of using assembler in a C function?

But i don't want to use BL instruction. It's cause performance is reduce. I only use some instruction such as add,sub.... and save N,OV,Z flag in APSW register. Of course i can use assembler function but i don't know how to make it as a inline function.

Are you sure it supports ANDEQ/ORREQ in the manner you're using them?

"For the Cortex-M3, the conditional execution suffixes are usually used for branch instructions.
However, other instructions can also be used with the conditional execution suffixes if they
are inside an IF-THEN instruction block."

Are you using ITTEE or ITE, etc? If you want commentary on the code that fails, you'll need to post the failing code.

thank you. It's my fault. I don't use IT instruction but compiler generated it so i don't get any problem. But __forinline does not work. complier generate BL.W UpdateMathFlag instruction so i add push,pop,bx to make it work

here my code __forceinline __asm void UpdateMathFlag(uint8_t* status)
{ PUSH {r1} LDR r1,[r0]

IT EQ ORREQ r1,#0x01 ; zero flag

IT VS ORRVS r1,#0x02 ; Overflow Flag

IT MI ORRMI r1,#0x04 ; negative flag

STRB r1,[r0] POP {R1} BX LR
}

here my C version after add IT instruction.

__inline void UpdateMathFlag2(uint8_t* status)
{ uint32_t temp; __asm { push {r1} LDRB temp,[status] BIC temp,#0x07

IT EQ ORREQ temp,#1

IT VS ORRVS temp,#2

IT MI ORRMI temp,#4

STRB temp,[status] }
}

Now no error occurs but Keil ARM C/C++ complier is stop working and say :internal fault in function which calls UpdateMathFlag2.

__forceinline __asm void UpdateMathFlag(uint8_t* status)
{ PUSH {r1} LDR r1,[r0]

IT EQ ORREQ r1,#0x01 ; zero flag

IT VS ORRVS r1,#0x02 ; Overflow Flag

IT MI ORRMI r1,#0x04 ; negative flag

STRB r1,[r0] POP {R1} BX LR
}

__inline void UpdateMathFlag2(uint8_t* status)
{ uint32_t temp;
__asm { LDRB temp,[status] BIC temp,#0x07 IT EQ ORREQ temp,#1 IT VS ORRVS temp,#2 IT MI ORRMI temp,#4 STRB temp,[status] }
}