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[libcpu][cortex-a] Replace FPU init loop with rt_memset

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Co-authored-by: BernardXiong <1241087+BernardXiong@users.noreply.github.com>
This commit is contained in:
copilot-swe-agent[bot]
2025-11-11 01:31:53 +00:00
parent 4dc072c04c
commit 06eae477b8
1 changed files with 2 additions and 7 deletions
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9
libcpu/arm/cortex-a/stack.c
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@@ -31,9 +31,6 @@ rt_uint8_t *rt_hw_stack_init(void *tentry, void *parameter,
rt_uint8_t *stack_addr, void *texit)
{
rt_uint32_t *stk;
#ifdef RT_USING_FPU
rt_uint32_t i;
#endif
stack_addr += sizeof(rt_uint32_t);
stack_addr = (rt_uint8_t *)RT_ALIGN_DOWN((rt_uint32_t)stack_addr, 8);
@@ -67,10 +64,8 @@ rt_uint8_t *rt_hw_stack_init(void *tentry, void *parameter,
/* FPU context initialization matches context_gcc.S restore order:
* Stack layout (high to low): FPEXC -> FPSCR -> D16-D31 -> D0-D15
*/
for (i = 0; i < VFP_DATA_NR; i++)
{
*(--stk) = 0; /* Initialize D0-D31 (64 words for 32 double regs) */
}
stk -= VFP_DATA_NR;
rt_memset(stk, 0, VFP_DATA_NR * sizeof(rt_uint32_t)); /* Initialize D0-D31 (64 words for 32 double regs) */
*(--stk) = 0; /* FPSCR: Floating-Point Status and Control Register */
*(--stk) = 0x40000000; /* FPEXC: Enable FPU (bit 30 = EN) */
#endif