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Fix asm operand has impossible constraints error in modern gcc versions (#956)

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This commit is contained in:
bootsector
2025-01-21 01:43:59 -05:00
committed by GitHub
parent 57d29ae3e5
commit 599f9e2f95
1 changed files with 17 additions and 15 deletions
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32
fpga_io.cpp
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@@ -229,7 +229,7 @@ static int fpgamgr_program_init(void)
#define DIV_ROUND_UP(n,d) (((n) + (d) - 1) / (d))
/* Write the RBF data to FPGA Manager */
static void fpgamgr_program_write(const void *rbf_data, unsigned long rbf_size)
static void fpgamgr_program_write(const void *rbf_data, size_t rbf_size)
{
uint32_t src = (uint32_t)rbf_data;
uint32_t dst = (uint32_t)MAP_ADDR(SOCFPGA_FPGAMGRDATA_ADDRESS);
@@ -239,21 +239,23 @@ static void fpgamgr_program_write(const void *rbf_data, unsigned long rbf_size)
/* Number of loops for 4-byte long copying + trailing bytes */
uint32_t loops4 = DIV_ROUND_UP(rbf_size % 32, 4);
__asm volatile(
"1: ldmia %0!,{r0-r7} \n"
" stmia %1!,{r0-r7} \n"
" sub %1, #32 \n"
" subs %2, #1 \n"
" bne 1b \n"
" cmp %3, #0 \n"
" beq 3f \n"
"2: ldr %2, [%0], #4 \n"
" str %2, [%1] \n"
" subs %3, #1 \n"
" bne 2b \n"
"3: nop \n"
asm volatile(
" cmp %2, #0\n"
" beq 2f\n"
"1: ldmia %0!, {r4-r11}\n"
" stmia %1!, {r4-r11}\n"
" sub %1, #32\n"
" subs %2, #1\n"
" bne 1b\n"
"2: cmp %3, #0\n"
" beq 4f\n"
"3: ldr %2, [%0], #4\n"
" str %2, [%1]\n"
" subs %3, #1\n"
" bne 3b\n"
"4: nop\n"
: "+r"(src), "+r"(dst), "+r"(loops32), "+r"(loops4) :
: "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7", "cc");
: "r4", "r5", "r6", "r7", "r8", "r9", "r10", "r11", "cc");
}
/* Ensure the FPGA entering config done */