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Adapt timer code for Coldfire

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--HG--
branch : SDL-1.2
extra : convert_revision : svn%3Ac70aab31-4412-0410-b14c-859654838e24/branches/SDL-1.2%404159
This commit is contained in:
Patrice Mandin 2009-11-07 20:56:09 +00:00
parent 9c7075fc0b
commit 1ccc6106e8
1 changed files with 83 additions and 14 deletions
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97
src/timer/mint/SDL_vbltimer.S
View file

@ -36,14 +36,61 @@
.globl _SDL_MintAudio_hasfpu
/*--- Save/restore FPU context ---*/
#if defined(__mcoldfire__)
#define SAVE_FPU_CONTEXT \
lea sp@(-216),sp; \
fsave sp@; \
fmovel fpiar,sp@-; \
lea sp@(-64),sp; \
fmovemd fp0-fp7,sp@
#define RESTORE_FPU_CONTEXT \
fmovemd sp@,fp0-fp7; \
lea sp@(64),sp; \
fmovel sp@+,fpiar; \
frestore sp@; \
lea sp@(216),sp
#else
#define SAVE_FPU_CONTEXT \
.chip 68k/68881; \
fsave sp@-; \
fmoveml fpcr/fpsr/fpiar,sp@-; \
fmovemx fp0-fp7,sp@-; \
.chip 68k
#define RESTORE_FPU_CONTEXT \
.chip 68k/68881; \
fmovemx sp@+,fp0-fp7; \
fmoveml sp@+,fpcr/fpsr/fpiar; \
frestore sp@+; \
.chip 68k
#endif
/*--- Vector installer ---*/
_SDL_AtariVblInstall:
#if defined(__mcoldfire__)
movel sp@(4),d0
movel d0,my_vector
#else
movel sp@(4),my_vector
#endif
lea _my_vbl,a0
clrw vbl_mutex
#if defined(__mcoldfire__)
movel _hz_200.w,d0
movel d0, _SDL_Atari_hz200
#else
movel _hz_200.w, _SDL_Atari_hz200
#endif
/* Stop interrupts */
@ -58,7 +105,12 @@ bcl_search_place:
movel (a1),d1
beqs place_found
addql #4,a1
#if defined(__mcoldfire__)
subql #1,d0
bpls bcl_search_place
#else
dbra d0,bcl_search_place
#endif
/* Not found */
moveq #1,d0
@ -100,7 +152,12 @@ bcl2_search_place:
moveq #0,d1
next_place:
addql #4,a1
#if defined(__mcoldfire__)
subql #1,d1
bpls bcl_search_place
#else
dbra d1,bcl2_search_place
#endif
/* Restart interrupts */
movew #0x2300,sr
@ -110,25 +167,37 @@ badvector:
/*--- Our vbl ---*/
_my_vbl:
#if defined(__mcoldfire__)
lea sp@(-60),sp
moveml d0-d7/a0-a6,sp@
#else
moveml d0-d7/a0-a6,sp@-
#endif
/* Update _hz_200 */
#if defined(__mcoldfire__)
movel _hz_200.w,d0
movel d0, _SDL_Atari_hz200
#else
movel _hz_200.w, _SDL_Atari_hz200
#endif
/* Verify if this is not already running */
tstw vbl_mutex
bnes vbl_end
#if defined(__mcoldfire__)
movew vbl_mutex,d0
notl d0
movew d0,vbl_mutex
#else
notw vbl_mutex
moveml d0-d7/a0-a6,sp@-
#endif
/* Save FPU if needed */
tstw _SDL_MintAudio_hasfpu
beqs SDL_AtariVbl_nofpu1
.chip 68060
fsave sp@-
fmoveml fpcr/fpsr/fpiar,sp@-
fmovemx fp0-fp7,sp@-
.chip 68000
SAVE_FPU_CONTEXT
SDL_AtariVbl_nofpu1:
movel my_vector,a0
@ -137,17 +206,17 @@ SDL_AtariVbl_nofpu1:
/* Restore FPU if needed */
tstw _SDL_MintAudio_hasfpu
beqs SDL_AtariVbl_Xbios_nofpu2
.chip 68060
fmovemx sp@+,fp0-fp7
fmoveml sp@+,fpcr/fpsr/fpiar
frestore sp@+
.chip 68000
RESTORE_FPU_CONTEXT
SDL_AtariVbl_Xbios_nofpu2:
moveml sp@+,d0-d7/a0-a6
clrw vbl_mutex
vbl_end:
#if defined(__mcoldfire__)
moveml sp@,d0-d7/a0-a6
lea sp@(60),sp
#else
moveml sp@+,d0-d7/a0-a6
#endif
rts
.data