https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87373
--- Comment #31 from Murat Ursavaş <murat.ursavas at gmail dot com> --- (In reply to Murat Ursavaş from comment #28) > > Here's the disassembly of a problematic part: > > 4.9.3 > > 121 NVM_SPI->ROUTE = USART_ROUTE_TXPEN | USART_ROUTE_RXPEN | > USART_ROUTE_CLKPEN | NVM_SPI_LOCATION; > 00029e38: ldr r3,[pc,#0x4c] ; 0x29e84 > 00029e3a: ldr r2,[r3,#0x54] > 00029e3c: movs r2,#0x0 > 00029e3e: orr r2,r2,#0xb > 00029e42: str r2,[r3,#0x54] > > 7.3.1 > > 121 NVM_SPI->ROUTE = USART_ROUTE_TXPEN | USART_ROUTE_RXPEN | > USART_ROUTE_CLKPEN | NVM_SPI_LOCATION; > 0000572e: ldr r3,[pc,#0x70] ; 0x579c > 00005730: ldrb.w r2,[r3,#0x54] > 00005734: movs r2,#0x0 > 00005736: orr r2,r2,#0xb > 0000573a: strb.w r2,[r3,#0x54] > 0000573e: ldrb.w r2,[r3,#0x55] > 00005742: movs r2,#0x0 > 00005744: strb.w r2,[r3,#0x55] > 00005748: ldrb.w r2,[r3,#0x56] > 0000574c: movs r2,#0x0 > 0000574e: strb.w r2,[r3,#0x56] > 00005752: ldrb.w r2,[r3,#0x57] > 00005756: movs r2,#0x0 > 00005758: strb.w r2,[r3,#0x57] My limited assembler knowledge says new one is byte by byte access and should set the register correctly, but somehow it's not. Could actual object code be different than what I see in the disassembly? I'll try to verify it via inspecting the code space.
