Hi everyone,
A student of mine find this problem when trying to do some complex math jobs in two different task.
I checked Hwi_disp_asm.s28. SYS/BIOS only save&restore the fixed-point registers and FPU32 registers.
dispatchMain .macro ; body of dispatcher
; At this point, the following registers have already been saved:
; ** Automatic interrupt context save (see SPRU513C) **
; ST0, T, AL, AH, PL, PH, AR0, AR1, DP, ST1, DBGSTAT, PC, and IER.
; ** Pushed on stack so far **
; XAR4
clrc page0,ovm
spm 0
; Save C context
push ar1h:ar0h
push xar6
push xar7
push xt
.if (.TMS320C2800_FPU32 == 1)
; Save 28FP registers
mov32 *sp++, stf ; Save FPU status reg
mov32 *sp++, r0h ; Save floating point regs
mov32 *sp++, r1h ; only r0h-r3h required here
mov32 *sp++, r2h
mov32 *sp++, r3h
setflg rndf32=1
.endif
; align sp since acc is two words
mov ah,@sp
asp
push acc
; Place intNum in register 'al'
mov al, ar5
sub al, #0xd00 ; al has vect id * 2
lsr al, #1 ; al has vect id
movl xar4, #_ti_sysbios_family_c28_Hwi_dispatchC__I
lcr *xar4
.endm
When wil TI fix this bug?
