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-rw-r--r--libco/ppc.c407
1 files changed, 0 insertions, 407 deletions
diff --git a/libco/ppc.c b/libco/ppc.c
deleted file mode 100644
index f6cb536..0000000
--- a/libco/ppc.c
+++ /dev/null
@@ -1,407 +0,0 @@
-/*
- libco.ppc (2010-10-17)
- author: blargg
- license: public domain
-*/
-
-/* PowerPC 32/64 using embedded or external asm, with optional
-floating-point and AltiVec save/restore */
-
-#define LIBCO_C
-#include <libco.h>
-#include <stdlib.h>
-#include <stdint.h>
-#include <string.h>
-
-#define LIBCO_MPROTECT (__unix__ && !LIBCO_PPC_ASM)
-
-#if LIBCO_MPROTECT
- #include <unistd.h>
- #include <sys/mman.h>
-#endif
-
-/* State format (offsets in 32-bit words)
-
-+0 Pointer to swap code
- Rest of function descriptor for entry function
-+8 PC
-+10 SP
- Special regs
- GPRs
- FPRs
- VRs
- stack
-*/
-
-enum { state_size = 1024 };
-enum { above_stack = 2048 };
-enum { stack_align = 256 };
-
-static thread_local cothread_t co_active_handle = 0;
-
-/**** Determine environment ****/
-
-#define LIBCO_PPC64 (_ARCH_PPC64 || __PPC64__ || __ppc64__ || __powerpc64__)
-
-/* Whether function calls are indirect through a descriptor,
-or are directly to function */
-#ifndef LIBCO_PPCDESC
- #if !_CALL_SYSV && (_CALL_AIX || _CALL_AIXDESC || LIBCO_PPC64)
- #define LIBCO_PPCDESC 1
- #endif
-#endif
-
-#ifdef LIBCO_PPC_ASM
-
- #ifdef __cplusplus
- extern "C"
- #endif
-
- /* Swap code is in ppc.S */
- void co_swap_asm( cothread_t, cothread_t );
- #define CO_SWAP_ASM( x, y ) co_swap_asm( x, y )
-
-#else
-
-/* Swap code is here in array. Please leave dieassembly comments,
-as they make it easy to see what it does, and reorder instructions
-if one wants to see whether that improves performance. */
-static const uint32_t libco_ppc_code [] = {
-#if LIBCO_PPC64
- 0x7d000026, /* mfcr r8 */
- 0xf8240028, /* std r1,40(r4) */
- 0x7d2802a6, /* mflr r9 */
- 0xf9c40048, /* std r14,72(r4) */
- 0xf9e40050, /* std r15,80(r4) */
- 0xfa040058, /* std r16,88(r4) */
- 0xfa240060, /* std r17,96(r4) */
- 0xfa440068, /* std r18,104(r4) */
- 0xfa640070, /* std r19,112(r4) */
- 0xfa840078, /* std r20,120(r4) */
- 0xfaa40080, /* std r21,128(r4) */
- 0xfac40088, /* std r22,136(r4) */
- 0xfae40090, /* std r23,144(r4) */
- 0xfb040098, /* std r24,152(r4) */
- 0xfb2400a0, /* std r25,160(r4) */
- 0xfb4400a8, /* std r26,168(r4) */
- 0xfb6400b0, /* std r27,176(r4) */
- 0xfb8400b8, /* std r28,184(r4) */
- 0xfba400c0, /* std r29,192(r4) */
- 0xfbc400c8, /* std r30,200(r4) */
- 0xfbe400d0, /* std r31,208(r4) */
- 0xf9240020, /* std r9,32(r4) */
- 0xe8e30020, /* ld r7,32(r3) */
- 0xe8230028, /* ld r1,40(r3) */
- 0x48000009, /* bl 1 */
- 0x7fe00008, /* trap */
- 0x91040030,/*1:stw r8,48(r4) */
- 0x80c30030, /* lwz r6,48(r3) */
- 0x7ce903a6, /* mtctr r7 */
- 0xe9c30048, /* ld r14,72(r3) */
- 0xe9e30050, /* ld r15,80(r3) */
- 0xea030058, /* ld r16,88(r3) */
- 0xea230060, /* ld r17,96(r3) */
- 0xea430068, /* ld r18,104(r3) */
- 0xea630070, /* ld r19,112(r3) */
- 0xea830078, /* ld r20,120(r3) */
- 0xeaa30080, /* ld r21,128(r3) */
- 0xeac30088, /* ld r22,136(r3) */
- 0xeae30090, /* ld r23,144(r3) */
- 0xeb030098, /* ld r24,152(r3) */
- 0xeb2300a0, /* ld r25,160(r3) */
- 0xeb4300a8, /* ld r26,168(r3) */
- 0xeb6300b0, /* ld r27,176(r3) */
- 0xeb8300b8, /* ld r28,184(r3) */
- 0xeba300c0, /* ld r29,192(r3) */
- 0xebc300c8, /* ld r30,200(r3) */
- 0xebe300d0, /* ld r31,208(r3) */
- 0x7ccff120, /* mtcr r6 */
-#else
- 0x7d000026, /* mfcr r8 */
- 0x90240028, /* stw r1,40(r4) */
- 0x7d2802a6, /* mflr r9 */
- 0x91a4003c, /* stw r13,60(r4) */
- 0x91c40040, /* stw r14,64(r4) */
- 0x91e40044, /* stw r15,68(r4) */
- 0x92040048, /* stw r16,72(r4) */
- 0x9224004c, /* stw r17,76(r4) */
- 0x92440050, /* stw r18,80(r4) */
- 0x92640054, /* stw r19,84(r4) */
- 0x92840058, /* stw r20,88(r4) */
- 0x92a4005c, /* stw r21,92(r4) */
- 0x92c40060, /* stw r22,96(r4) */
- 0x92e40064, /* stw r23,100(r4) */
- 0x93040068, /* stw r24,104(r4) */
- 0x9324006c, /* stw r25,108(r4) */
- 0x93440070, /* stw r26,112(r4) */
- 0x93640074, /* stw r27,116(r4) */
- 0x93840078, /* stw r28,120(r4) */
- 0x93a4007c, /* stw r29,124(r4) */
- 0x93c40080, /* stw r30,128(r4) */
- 0x93e40084, /* stw r31,132(r4) */
- 0x91240020, /* stw r9,32(r4) */
- 0x80e30020, /* lwz r7,32(r3) */
- 0x80230028, /* lwz r1,40(r3) */
- 0x48000009, /* bl 1 */
- 0x7fe00008, /* trap */
- 0x91040030,/*1:stw r8,48(r4) */
- 0x80c30030, /* lwz r6,48(r3) */
- 0x7ce903a6, /* mtctr r7 */
- 0x81a3003c, /* lwz r13,60(r3) */
- 0x81c30040, /* lwz r14,64(r3) */
- 0x81e30044, /* lwz r15,68(r3) */
- 0x82030048, /* lwz r16,72(r3) */
- 0x8223004c, /* lwz r17,76(r3) */
- 0x82430050, /* lwz r18,80(r3) */
- 0x82630054, /* lwz r19,84(r3) */
- 0x82830058, /* lwz r20,88(r3) */
- 0x82a3005c, /* lwz r21,92(r3) */
- 0x82c30060, /* lwz r22,96(r3) */
- 0x82e30064, /* lwz r23,100(r3) */
- 0x83030068, /* lwz r24,104(r3) */
- 0x8323006c, /* lwz r25,108(r3) */
- 0x83430070, /* lwz r26,112(r3) */
- 0x83630074, /* lwz r27,116(r3) */
- 0x83830078, /* lwz r28,120(r3) */
- 0x83a3007c, /* lwz r29,124(r3) */
- 0x83c30080, /* lwz r30,128(r3) */
- 0x83e30084, /* lwz r31,132(r3) */
- 0x7ccff120, /* mtcr r6 */
-#endif
-
-#ifndef LIBCO_PPC_NOFP
- 0xd9c400e0, /* stfd f14,224(r4) */
- 0xd9e400e8, /* stfd f15,232(r4) */
- 0xda0400f0, /* stfd f16,240(r4) */
- 0xda2400f8, /* stfd f17,248(r4) */
- 0xda440100, /* stfd f18,256(r4) */
- 0xda640108, /* stfd f19,264(r4) */
- 0xda840110, /* stfd f20,272(r4) */
- 0xdaa40118, /* stfd f21,280(r4) */
- 0xdac40120, /* stfd f22,288(r4) */
- 0xdae40128, /* stfd f23,296(r4) */
- 0xdb040130, /* stfd f24,304(r4) */
- 0xdb240138, /* stfd f25,312(r4) */
- 0xdb440140, /* stfd f26,320(r4) */
- 0xdb640148, /* stfd f27,328(r4) */
- 0xdb840150, /* stfd f28,336(r4) */
- 0xdba40158, /* stfd f29,344(r4) */
- 0xdbc40160, /* stfd f30,352(r4) */
- 0xdbe40168, /* stfd f31,360(r4) */
- 0xc9c300e0, /* lfd f14,224(r3) */
- 0xc9e300e8, /* lfd f15,232(r3) */
- 0xca0300f0, /* lfd f16,240(r3) */
- 0xca2300f8, /* lfd f17,248(r3) */
- 0xca430100, /* lfd f18,256(r3) */
- 0xca630108, /* lfd f19,264(r3) */
- 0xca830110, /* lfd f20,272(r3) */
- 0xcaa30118, /* lfd f21,280(r3) */
- 0xcac30120, /* lfd f22,288(r3) */
- 0xcae30128, /* lfd f23,296(r3) */
- 0xcb030130, /* lfd f24,304(r3) */
- 0xcb230138, /* lfd f25,312(r3) */
- 0xcb430140, /* lfd f26,320(r3) */
- 0xcb630148, /* lfd f27,328(r3) */
- 0xcb830150, /* lfd f28,336(r3) */
- 0xcba30158, /* lfd f29,344(r3) */
- 0xcbc30160, /* lfd f30,352(r3) */
- 0xcbe30168, /* lfd f31,360(r3) */
-#endif
-
-#ifdef __ALTIVEC__
- 0x7ca042a6, /* mfvrsave r5 */
- 0x39040180, /* addi r8,r4,384 */
- 0x39240190, /* addi r9,r4,400 */
- 0x70a00fff, /* andi. r0,r5,4095 */
- 0x90a40034, /* stw r5,52(r4) */
- 0x4182005c, /* beq- 2 */
- 0x7e8041ce, /* stvx v20,r0,r8 */
- 0x39080020, /* addi r8,r8,32 */
- 0x7ea049ce, /* stvx v21,r0,r9 */
- 0x39290020, /* addi r9,r9,32 */
- 0x7ec041ce, /* stvx v22,r0,r8 */
- 0x39080020, /* addi r8,r8,32 */
- 0x7ee049ce, /* stvx v23,r0,r9 */
- 0x39290020, /* addi r9,r9,32 */
- 0x7f0041ce, /* stvx v24,r0,r8 */
- 0x39080020, /* addi r8,r8,32 */
- 0x7f2049ce, /* stvx v25,r0,r9 */
- 0x39290020, /* addi r9,r9,32 */
- 0x7f4041ce, /* stvx v26,r0,r8 */
- 0x39080020, /* addi r8,r8,32 */
- 0x7f6049ce, /* stvx v27,r0,r9 */
- 0x39290020, /* addi r9,r9,32 */
- 0x7f8041ce, /* stvx v28,r0,r8 */
- 0x39080020, /* addi r8,r8,32 */
- 0x7fa049ce, /* stvx v29,r0,r9 */
- 0x39290020, /* addi r9,r9,32 */
- 0x7fc041ce, /* stvx v30,r0,r8 */
- 0x7fe049ce, /* stvx v31,r0,r9 */
- 0x80a30034,/*2:lwz r5,52(r3) */
- 0x39030180, /* addi r8,r3,384 */
- 0x39230190, /* addi r9,r3,400 */
- 0x70a00fff, /* andi. r0,r5,4095 */
- 0x7ca043a6, /* mtvrsave r5 */
- 0x4d820420, /* beqctr */
- 0x7e8040ce, /* lvx v20,r0,r8 */
- 0x39080020, /* addi r8,r8,32 */
- 0x7ea048ce, /* lvx v21,r0,r9 */
- 0x39290020, /* addi r9,r9,32 */
- 0x7ec040ce, /* lvx v22,r0,r8 */
- 0x39080020, /* addi r8,r8,32 */
- 0x7ee048ce, /* lvx v23,r0,r9 */
- 0x39290020, /* addi r9,r9,32 */
- 0x7f0040ce, /* lvx v24,r0,r8 */
- 0x39080020, /* addi r8,r8,32 */
- 0x7f2048ce, /* lvx v25,r0,r9 */
- 0x39290020, /* addi r9,r9,32 */
- 0x7f4040ce, /* lvx v26,r0,r8 */
- 0x39080020, /* addi r8,r8,32 */
- 0x7f6048ce, /* lvx v27,r0,r9 */
- 0x39290020, /* addi r9,r9,32 */
- 0x7f8040ce, /* lvx v28,r0,r8 */
- 0x39080020, /* addi r8,r8,32 */
- 0x7fa048ce, /* lvx v29,r0,r9 */
- 0x39290020, /* addi r9,r9,32 */
- 0x7fc040ce, /* lvx v30,r0,r8 */
- 0x7fe048ce, /* lvx v31,r0,r9 */
-#endif
-
- 0x4e800420, /* bctr */
-};
-
- #if LIBCO_PPCDESC
- /* Function call goes through indirect descriptor */
- #define CO_SWAP_ASM( x, y ) \
- ((void (*)( cothread_t, cothread_t )) (uintptr_t) x)( x, y )
- #else
- /* Function call goes directly to code */
- #define CO_SWAP_ASM( x, y ) \
- ((void (*)( cothread_t, cothread_t )) (uintptr_t) libco_ppc_code)( x, y )
- #endif
-
-#endif
-
-static uint32_t* co_create_( unsigned size, uintptr_t entry )
-{
- uint32_t* t = (uint32_t*) malloc( size );
-
- (void) entry;
-
- #if LIBCO_PPCDESC
- if ( t )
- {
- /* Copy entry's descriptor */
- memcpy( t, (void*) entry, sizeof (void*) * 3 );
-
- /* Set function pointer to swap routine */
- #ifdef LIBCO_PPC_ASM
- *(const void**) t = *(void**) &co_swap_asm;
- #else
- *(const void**) t = libco_ppc_code;
- #endif
- }
- #endif
-
- return t;
-}
-
-cothread_t co_create( unsigned int size, void (*entry_)( void ) )
-{
- uintptr_t entry = (uintptr_t) entry_;
- uint32_t* t = NULL;
-
- /* Be sure main thread was successfully allocated */
- if ( co_active() )
- {
- size += state_size + above_stack + stack_align;
- t = co_create_( size, entry );
- }
-
- if ( t )
- {
- uintptr_t sp;
- int shift;
-
- /* Save current registers into new thread, so that any special ones will
- have proper values when thread is begun */
- CO_SWAP_ASM( t, t );
-
- #if LIBCO_PPCDESC
- /* Get real address */
- entry = (uintptr_t) *(void**) entry;
- #endif
-
- /* Put stack near end of block, and align */
- sp = (uintptr_t) t + size - above_stack;
- sp -= sp % stack_align;
-
- /* On PPC32, we save and restore GPRs as 32 bits. For PPC64, we
- save and restore them as 64 bits, regardless of the size the ABI
- uses. So, we manually write pointers at the proper size. We always
- save and restore at the same address, and since PPC is big-endian,
- we must put the low byte first on PPC32. */
-
- /* If uintptr_t is 32 bits, >>32 is undefined behavior, so we do two shifts
- and don't have to care how many bits uintptr_t is. */
- #if LIBCO_PPC64
- shift = 16;
- #else
- shift = 0;
- #endif
-
- /* Set up so entry will be called on next swap */
- t [8] = (uint32_t) (entry >> shift >> shift);
- t [9] = (uint32_t) entry;
-
- t [10] = (uint32_t) (sp >> shift >> shift);
- t [11] = (uint32_t) sp;
- }
-
- return t;
-}
-
-void co_delete( cothread_t t )
-{
- free(t);
-}
-
-static void co_init_( void )
-{
-#if LIBCO_MPROTECT
- /* TODO: pre- and post-pad PPC code so that this doesn't make other
- data executable and writable */
- long page_size = sysconf( _SC_PAGESIZE );
- if ( page_size > 0 )
- {
- uintptr_t align = page_size;
- uintptr_t begin = (uintptr_t) libco_ppc_code;
- uintptr_t end = begin + sizeof libco_ppc_code;
-
- /* Align beginning and end */
- end += align - 1;
- end -= end % align;
- begin -= begin % align;
-
- mprotect( (void*) begin, end - begin, PROT_READ | PROT_WRITE | PROT_EXEC );
- }
-#endif
-
- co_active_handle = co_create_( state_size, (uintptr_t) &co_switch );
-}
-
-cothread_t co_active(void)
-{
- if (!co_active_handle)
- co_init_();
-
- return co_active_handle;
-}
-
-void co_switch(cothread_t t)
-{
- cothread_t old = co_active_handle;
- co_active_handle = t;
-
- CO_SWAP_ASM( t, old );
-}
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