diff options
Diffstat (limited to 'ports/risc-v32/gnu/src/tx_initialize_low_level.S')
| -rw-r--r-- | ports/risc-v32/gnu/src/tx_initialize_low_level.S | 9 |
1 files changed, 5 insertions, 4 deletions
diff --git a/ports/risc-v32/gnu/src/tx_initialize_low_level.S b/ports/risc-v32/gnu/src/tx_initialize_low_level.S index 2940f215..ca97ba62 100644 --- a/ports/risc-v32/gnu/src/tx_initialize_low_level.S +++ b/ports/risc-v32/gnu/src/tx_initialize_low_level.S @@ -62,8 +62,7 @@ __tx_free_memory_start: /**************************************************************************/ /* VOID _tx_initialize_low_level(VOID) { */ - .weak _tx_initialize_low_level - .weak _tx_initialize_low_level + .weak _tx_initialize_low_level // Weak: a BSP definition overrides this default _tx_initialize_low_level: /* Save the system stack pointer. */ @@ -79,8 +78,10 @@ _tx_initialize_low_level: la t1, _tx_initialize_unused_memory // Pickup address of unused memory sw t0, 0(t1) // Save unused memory address - /* Initialize floating point control/status register if floating point is enabled. */ -#ifdef __riscv_flen + /* Initialize floating point state if floating point is enabled. */ +#if defined(__riscv_float_abi_double) + li t0, 0x2000 // mstatus.FS = Initial (bits 14:13 = 01) + csrrs zero, mstatus, t0 // Enable the FP unit before touching fcsr li t0, 0 csrw fcsr, t0 // Clear FP control/status register #endif |