| // Copyright 2009 The Go Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style |
| // license that can be found in the LICENSE file. |
| |
| #include "zasm_GOOS_GOARCH.h" |
| |
| TEXT _rt0_386(SB),7,$0 |
| // copy arguments forward on an even stack |
| MOVL argc+0(FP), AX |
| MOVL argv+4(FP), BX |
| SUBL $128, SP // plenty of scratch |
| ANDL $~15, SP |
| MOVL AX, 120(SP) // save argc, argv away |
| MOVL BX, 124(SP) |
| |
| // set default stack bounds. |
| // _cgo_init may update stackguard. |
| MOVL $runtime·g0(SB), BP |
| LEAL (-64*1024+104)(SP), BX |
| MOVL BX, g_stackguard(BP) |
| MOVL SP, g_stackbase(BP) |
| |
| // find out information about the processor we're on |
| MOVL $0, AX |
| CPUID |
| CMPL AX, $0 |
| JE nocpuinfo |
| MOVL $1, AX |
| CPUID |
| MOVL CX, runtime·cpuid_ecx(SB) |
| MOVL DX, runtime·cpuid_edx(SB) |
| nocpuinfo: |
| |
| // if there is an _cgo_init, call it to let it |
| // initialize and to set up GS. if not, |
| // we set up GS ourselves. |
| MOVL _cgo_init(SB), AX |
| TESTL AX, AX |
| JZ needtls |
| MOVL $setmg_gcc<>(SB), BX |
| MOVL BX, 4(SP) |
| MOVL BP, 0(SP) |
| CALL AX |
| // skip runtime·ldt0setup(SB) and tls test after _cgo_init for non-windows |
| CMPL runtime·iswindows(SB), $0 |
| JEQ ok |
| needtls: |
| // skip runtime·ldt0setup(SB) and tls test on Plan 9 in all cases |
| CMPL runtime·isplan9(SB), $1 |
| JEQ ok |
| |
| // set up %gs |
| CALL runtime·ldt0setup(SB) |
| |
| // store through it, to make sure it works |
| get_tls(BX) |
| MOVL $0x123, g(BX) |
| MOVL runtime·tls0(SB), AX |
| CMPL AX, $0x123 |
| JEQ ok |
| MOVL AX, 0 // abort |
| ok: |
| // set up m and g "registers" |
| get_tls(BX) |
| LEAL runtime·g0(SB), CX |
| MOVL CX, g(BX) |
| LEAL runtime·m0(SB), AX |
| MOVL AX, m(BX) |
| |
| // save m->g0 = g0 |
| MOVL CX, m_g0(AX) |
| |
| CALL runtime·emptyfunc(SB) // fault if stack check is wrong |
| |
| // convention is D is always cleared |
| CLD |
| |
| CALL runtime·check(SB) |
| |
| // saved argc, argv |
| MOVL 120(SP), AX |
| MOVL AX, 0(SP) |
| MOVL 124(SP), AX |
| MOVL AX, 4(SP) |
| CALL runtime·args(SB) |
| CALL runtime·osinit(SB) |
| CALL runtime·hashinit(SB) |
| CALL runtime·schedinit(SB) |
| |
| // create a new goroutine to start program |
| PUSHL $runtime·main·f(SB) // entry |
| PUSHL $0 // arg size |
| CALL runtime·newproc(SB) |
| POPL AX |
| POPL AX |
| |
| // start this M |
| CALL runtime·mstart(SB) |
| |
| INT $3 |
| RET |
| |
| DATA runtime·main·f+0(SB)/4,$runtime·main(SB) |
| GLOBL runtime·main·f(SB),8,$4 |
| |
| TEXT runtime·breakpoint(SB),7,$0 |
| INT $3 |
| RET |
| |
| TEXT runtime·asminit(SB),7,$0 |
| // Linux and MinGW start the FPU in extended double precision. |
| // Other operating systems use double precision. |
| // Change to double precision to match them, |
| // and to match other hardware that only has double. |
| PUSHL $0x27F |
| FLDCW 0(SP) |
| POPL AX |
| RET |
| |
| /* |
| * go-routine |
| */ |
| |
| // void gosave(Gobuf*) |
| // save state in Gobuf; setjmp |
| TEXT runtime·gosave(SB), 7, $0 |
| MOVL 4(SP), AX // gobuf |
| LEAL 4(SP), BX // caller's SP |
| MOVL BX, gobuf_sp(AX) |
| MOVL 0(SP), BX // caller's PC |
| MOVL BX, gobuf_pc(AX) |
| get_tls(CX) |
| MOVL g(CX), BX |
| MOVL BX, gobuf_g(AX) |
| RET |
| |
| // void gogo(Gobuf*, uintptr) |
| // restore state from Gobuf; longjmp |
| TEXT runtime·gogo(SB), 7, $0 |
| MOVL 8(SP), AX // return 2nd arg |
| MOVL 4(SP), BX // gobuf |
| MOVL gobuf_g(BX), DX |
| MOVL 0(DX), CX // make sure g != nil |
| get_tls(CX) |
| MOVL DX, g(CX) |
| MOVL gobuf_sp(BX), SP // restore SP |
| MOVL gobuf_pc(BX), BX |
| JMP BX |
| |
| // void gogocall(Gobuf*, void (*fn)(void), uintptr r0) |
| // restore state from Gobuf but then call fn. |
| // (call fn, returning to state in Gobuf) |
| TEXT runtime·gogocall(SB), 7, $0 |
| MOVL 12(SP), DX // context |
| MOVL 8(SP), AX // fn |
| MOVL 4(SP), BX // gobuf |
| MOVL gobuf_g(BX), DI |
| get_tls(CX) |
| MOVL DI, g(CX) |
| MOVL 0(DI), CX // make sure g != nil |
| MOVL gobuf_sp(BX), SP // restore SP |
| MOVL gobuf_pc(BX), BX |
| PUSHL BX |
| JMP AX |
| POPL BX // not reached |
| |
| // void gogocallfn(Gobuf*, FuncVal*) |
| // restore state from Gobuf but then call fn. |
| // (call fn, returning to state in Gobuf) |
| TEXT runtime·gogocallfn(SB), 7, $0 |
| MOVL 8(SP), DX // fn |
| MOVL 4(SP), BX // gobuf |
| MOVL gobuf_g(BX), DI |
| get_tls(CX) |
| MOVL DI, g(CX) |
| MOVL 0(DI), CX // make sure g != nil |
| MOVL gobuf_sp(BX), SP // restore SP |
| MOVL gobuf_pc(BX), BX |
| PUSHL BX |
| MOVL 0(DX), BX |
| JMP BX |
| POPL BX // not reached |
| |
| // void mcall(void (*fn)(G*)) |
| // Switch to m->g0's stack, call fn(g). |
| // Fn must never return. It should gogo(&g->sched) |
| // to keep running g. |
| TEXT runtime·mcall(SB), 7, $0 |
| MOVL fn+0(FP), DI |
| |
| get_tls(CX) |
| MOVL g(CX), AX // save state in g->gobuf |
| MOVL 0(SP), BX // caller's PC |
| MOVL BX, (g_sched+gobuf_pc)(AX) |
| LEAL 4(SP), BX // caller's SP |
| MOVL BX, (g_sched+gobuf_sp)(AX) |
| MOVL AX, (g_sched+gobuf_g)(AX) |
| |
| // switch to m->g0 & its stack, call fn |
| MOVL m(CX), BX |
| MOVL m_g0(BX), SI |
| CMPL SI, AX // if g == m->g0 call badmcall |
| JNE 2(PC) |
| CALL runtime·badmcall(SB) |
| MOVL SI, g(CX) // g = m->g0 |
| MOVL (g_sched+gobuf_sp)(SI), SP // sp = m->g0->gobuf.sp |
| PUSHL AX |
| CALL DI |
| POPL AX |
| CALL runtime·badmcall2(SB) |
| RET |
| |
| /* |
| * support for morestack |
| */ |
| |
| // Called during function prolog when more stack is needed. |
| TEXT runtime·morestack(SB),7,$0 |
| // Cannot grow scheduler stack (m->g0). |
| get_tls(CX) |
| MOVL m(CX), BX |
| MOVL m_g0(BX), SI |
| CMPL g(CX), SI |
| JNE 2(PC) |
| INT $3 |
| |
| MOVL DX, m_cret(BX) |
| |
| // frame size in DI |
| // arg size in AX |
| // Save in m. |
| MOVL DI, m_moreframesize(BX) |
| MOVL AX, m_moreargsize(BX) |
| |
| // Called from f. |
| // Set m->morebuf to f's caller. |
| MOVL 4(SP), DI // f's caller's PC |
| MOVL DI, (m_morebuf+gobuf_pc)(BX) |
| LEAL 8(SP), CX // f's caller's SP |
| MOVL CX, (m_morebuf+gobuf_sp)(BX) |
| MOVL CX, m_moreargp(BX) |
| get_tls(CX) |
| MOVL g(CX), SI |
| MOVL SI, (m_morebuf+gobuf_g)(BX) |
| |
| // Set m->morepc to f's PC. |
| MOVL 0(SP), AX |
| MOVL AX, m_morepc(BX) |
| |
| // Call newstack on m->g0's stack. |
| MOVL m_g0(BX), BP |
| MOVL BP, g(CX) |
| MOVL (g_sched+gobuf_sp)(BP), AX |
| MOVL -4(AX), BX // fault if CALL would, before smashing SP |
| MOVL AX, SP |
| CALL runtime·newstack(SB) |
| MOVL $0, 0x1003 // crash if newstack returns |
| RET |
| |
| // Called from reflection library. Mimics morestack, |
| // reuses stack growth code to create a frame |
| // with the desired args running the desired function. |
| // |
| // func call(fn *byte, arg *byte, argsize uint32). |
| TEXT reflect·call(SB), 7, $0 |
| get_tls(CX) |
| MOVL m(CX), BX |
| |
| // Save our caller's state as the PC and SP to |
| // restore when returning from f. |
| MOVL 0(SP), AX // our caller's PC |
| MOVL AX, (m_morebuf+gobuf_pc)(BX) |
| LEAL 4(SP), AX // our caller's SP |
| MOVL AX, (m_morebuf+gobuf_sp)(BX) |
| MOVL g(CX), AX |
| MOVL AX, (m_morebuf+gobuf_g)(BX) |
| |
| // Set up morestack arguments to call f on a new stack. |
| // We set f's frame size to 1, as a hint to newstack |
| // that this is a call from reflect·call. |
| // If it turns out that f needs a larger frame than |
| // the default stack, f's usual stack growth prolog will |
| // allocate a new segment (and recopy the arguments). |
| MOVL 4(SP), AX // fn |
| MOVL 8(SP), DX // arg frame |
| MOVL 12(SP), CX // arg size |
| |
| MOVL AX, m_morepc(BX) // f's PC |
| MOVL DX, m_moreargp(BX) // f's argument pointer |
| MOVL CX, m_moreargsize(BX) // f's argument size |
| MOVL $1, m_moreframesize(BX) // f's frame size |
| |
| // Call newstack on m->g0's stack. |
| MOVL m_g0(BX), BP |
| get_tls(CX) |
| MOVL BP, g(CX) |
| MOVL (g_sched+gobuf_sp)(BP), SP |
| CALL runtime·newstack(SB) |
| MOVL $0, 0x1103 // crash if newstack returns |
| RET |
| |
| |
| // Return point when leaving stack. |
| TEXT runtime·lessstack(SB), 7, $0 |
| // Save return value in m->cret |
| get_tls(CX) |
| MOVL m(CX), BX |
| MOVL AX, m_cret(BX) |
| |
| // Call oldstack on m->g0's stack. |
| MOVL m_g0(BX), BP |
| MOVL BP, g(CX) |
| MOVL (g_sched+gobuf_sp)(BP), SP |
| CALL runtime·oldstack(SB) |
| MOVL $0, 0x1004 // crash if oldstack returns |
| RET |
| |
| |
| // bool cas(int32 *val, int32 old, int32 new) |
| // Atomically: |
| // if(*val == old){ |
| // *val = new; |
| // return 1; |
| // }else |
| // return 0; |
| TEXT runtime·cas(SB), 7, $0 |
| MOVL 4(SP), BX |
| MOVL 8(SP), AX |
| MOVL 12(SP), CX |
| LOCK |
| CMPXCHGL CX, 0(BX) |
| JZ 3(PC) |
| MOVL $0, AX |
| RET |
| MOVL $1, AX |
| RET |
| |
| // bool runtime·cas64(uint64 *val, uint64 *old, uint64 new) |
| // Atomically: |
| // if(*val == *old){ |
| // *val = new; |
| // return 1; |
| // } else { |
| // *old = *val |
| // return 0; |
| // } |
| TEXT runtime·cas64(SB), 7, $0 |
| MOVL 4(SP), BP |
| MOVL 8(SP), SI |
| MOVL 0(SI), AX |
| MOVL 4(SI), DX |
| MOVL 12(SP), BX |
| MOVL 16(SP), CX |
| LOCK |
| CMPXCHG8B 0(BP) |
| JNZ cas64_fail |
| MOVL $1, AX |
| RET |
| cas64_fail: |
| MOVL AX, 0(SI) |
| MOVL DX, 4(SI) |
| MOVL $0, AX |
| RET |
| |
| // bool casp(void **p, void *old, void *new) |
| // Atomically: |
| // if(*p == old){ |
| // *p = new; |
| // return 1; |
| // }else |
| // return 0; |
| TEXT runtime·casp(SB), 7, $0 |
| MOVL 4(SP), BX |
| MOVL 8(SP), AX |
| MOVL 12(SP), CX |
| LOCK |
| CMPXCHGL CX, 0(BX) |
| JZ 3(PC) |
| MOVL $0, AX |
| RET |
| MOVL $1, AX |
| RET |
| |
| // uint32 xadd(uint32 volatile *val, int32 delta) |
| // Atomically: |
| // *val += delta; |
| // return *val; |
| TEXT runtime·xadd(SB), 7, $0 |
| MOVL 4(SP), BX |
| MOVL 8(SP), AX |
| MOVL AX, CX |
| LOCK |
| XADDL AX, 0(BX) |
| ADDL CX, AX |
| RET |
| |
| TEXT runtime·xchg(SB), 7, $0 |
| MOVL 4(SP), BX |
| MOVL 8(SP), AX |
| XCHGL AX, 0(BX) |
| RET |
| |
| TEXT runtime·procyield(SB),7,$0 |
| MOVL 4(SP), AX |
| again: |
| PAUSE |
| SUBL $1, AX |
| JNZ again |
| RET |
| |
| TEXT runtime·atomicstorep(SB), 7, $0 |
| MOVL 4(SP), BX |
| MOVL 8(SP), AX |
| XCHGL AX, 0(BX) |
| RET |
| |
| TEXT runtime·atomicstore(SB), 7, $0 |
| MOVL 4(SP), BX |
| MOVL 8(SP), AX |
| XCHGL AX, 0(BX) |
| RET |
| |
| // uint64 atomicload64(uint64 volatile* addr); |
| // so actually |
| // void atomicload64(uint64 *res, uint64 volatile *addr); |
| TEXT runtime·atomicload64(SB), 7, $0 |
| MOVL 4(SP), BX |
| MOVL 8(SP), AX |
| // MOVQ (%EAX), %MM0 |
| BYTE $0x0f; BYTE $0x6f; BYTE $0x00 |
| // MOVQ %MM0, 0(%EBX) |
| BYTE $0x0f; BYTE $0x7f; BYTE $0x03 |
| // EMMS |
| BYTE $0x0F; BYTE $0x77 |
| RET |
| |
| // void runtime·atomicstore64(uint64 volatile* addr, uint64 v); |
| TEXT runtime·atomicstore64(SB), 7, $0 |
| MOVL 4(SP), AX |
| // MOVQ and EMMS were introduced on the Pentium MMX. |
| // MOVQ 0x8(%ESP), %MM0 |
| BYTE $0x0f; BYTE $0x6f; BYTE $0x44; BYTE $0x24; BYTE $0x08 |
| // MOVQ %MM0, (%EAX) |
| BYTE $0x0f; BYTE $0x7f; BYTE $0x00 |
| // EMMS |
| BYTE $0x0F; BYTE $0x77 |
| // This is essentially a no-op, but it provides required memory fencing. |
| // It can be replaced with MFENCE, but MFENCE was introduced only on the Pentium4 (SSE2). |
| MOVL $0, AX |
| LOCK |
| XADDL AX, (SP) |
| RET |
| |
| // void jmpdefer(fn, sp); |
| // called from deferreturn. |
| // 1. pop the caller |
| // 2. sub 5 bytes from the callers return |
| // 3. jmp to the argument |
| TEXT runtime·jmpdefer(SB), 7, $0 |
| MOVL 4(SP), DX // fn |
| MOVL 8(SP), BX // caller sp |
| LEAL -4(BX), SP // caller sp after CALL |
| SUBL $5, (SP) // return to CALL again |
| MOVL 0(DX), BX |
| JMP BX // but first run the deferred function |
| |
| // Dummy function to use in saved gobuf.PC, |
| // to match SP pointing at a return address. |
| // The gobuf.PC is unused by the contortions here |
| // but setting it to return will make the traceback code work. |
| TEXT return<>(SB),7,$0 |
| RET |
| |
| // asmcgocall(void(*fn)(void*), void *arg) |
| // Call fn(arg) on the scheduler stack, |
| // aligned appropriately for the gcc ABI. |
| // See cgocall.c for more details. |
| TEXT runtime·asmcgocall(SB),7,$0 |
| MOVL fn+0(FP), AX |
| MOVL arg+4(FP), BX |
| MOVL SP, DX |
| |
| // Figure out if we need to switch to m->g0 stack. |
| // We get called to create new OS threads too, and those |
| // come in on the m->g0 stack already. |
| get_tls(CX) |
| MOVL m(CX), BP |
| MOVL m_g0(BP), SI |
| MOVL g(CX), DI |
| CMPL SI, DI |
| JEQ 6(PC) |
| MOVL SP, (g_sched+gobuf_sp)(DI) |
| MOVL $return<>(SB), (g_sched+gobuf_pc)(DI) |
| MOVL DI, (g_sched+gobuf_g)(DI) |
| MOVL SI, g(CX) |
| MOVL (g_sched+gobuf_sp)(SI), SP |
| |
| // Now on a scheduling stack (a pthread-created stack). |
| SUBL $32, SP |
| ANDL $~15, SP // alignment, perhaps unnecessary |
| MOVL DI, 8(SP) // save g |
| MOVL DX, 4(SP) // save SP |
| MOVL BX, 0(SP) // first argument in x86-32 ABI |
| CALL AX |
| |
| // Restore registers, g, stack pointer. |
| get_tls(CX) |
| MOVL 8(SP), DI |
| MOVL DI, g(CX) |
| MOVL 4(SP), SP |
| RET |
| |
| // cgocallback(void (*fn)(void*), void *frame, uintptr framesize) |
| // Turn the fn into a Go func (by taking its address) and call |
| // cgocallback_gofunc. |
| TEXT runtime·cgocallback(SB),7,$12 |
| LEAL fn+0(FP), AX |
| MOVL AX, 0(SP) |
| MOVL frame+4(FP), AX |
| MOVL AX, 4(SP) |
| MOVL framesize+8(FP), AX |
| MOVL AX, 8(SP) |
| MOVL $runtime·cgocallback_gofunc(SB), AX |
| CALL AX |
| RET |
| |
| // cgocallback_gofunc(FuncVal*, void *frame, uintptr framesize) |
| // See cgocall.c for more details. |
| TEXT runtime·cgocallback_gofunc(SB),7,$12 |
| // If m is nil, Go did not create the current thread. |
| // Call needm to obtain one for temporary use. |
| // In this case, we're running on the thread stack, so there's |
| // lots of space, but the linker doesn't know. Hide the call from |
| // the linker analysis by using an indirect call through AX. |
| get_tls(CX) |
| #ifdef GOOS_windows |
| CMPL CX, $0 |
| JNE 3(PC) |
| PUSHL $0 |
| JMP needm |
| #endif |
| MOVL m(CX), BP |
| PUSHL BP |
| CMPL BP, $0 |
| JNE havem |
| needm: |
| MOVL $runtime·needm(SB), AX |
| CALL AX |
| get_tls(CX) |
| MOVL m(CX), BP |
| |
| havem: |
| // Now there's a valid m, and we're running on its m->g0. |
| // Save current m->g0->sched.sp on stack and then set it to SP. |
| // Save current sp in m->g0->sched.sp in preparation for |
| // switch back to m->curg stack. |
| MOVL m_g0(BP), SI |
| PUSHL (g_sched+gobuf_sp)(SI) |
| MOVL SP, (g_sched+gobuf_sp)(SI) |
| |
| // Switch to m->curg stack and call runtime.cgocallbackg |
| // with the three arguments. Because we are taking over |
| // the execution of m->curg but *not* resuming what had |
| // been running, we need to save that information (m->curg->gobuf) |
| // so that we can restore it when we're done. |
| // We can restore m->curg->gobuf.sp easily, because calling |
| // runtime.cgocallbackg leaves SP unchanged upon return. |
| // To save m->curg->gobuf.pc, we push it onto the stack. |
| // This has the added benefit that it looks to the traceback |
| // routine like cgocallbackg is going to return to that |
| // PC (because we defined cgocallbackg to have |
| // a frame size of 12, the same amount that we use below), |
| // so that the traceback will seamlessly trace back into |
| // the earlier calls. |
| MOVL fn+0(FP), AX |
| MOVL frame+4(FP), BX |
| MOVL framesize+8(FP), DX |
| |
| MOVL m_curg(BP), SI |
| MOVL SI, g(CX) |
| MOVL (g_sched+gobuf_sp)(SI), DI // prepare stack as DI |
| |
| // Push gobuf.pc |
| MOVL (g_sched+gobuf_pc)(SI), BP |
| SUBL $4, DI |
| MOVL BP, 0(DI) |
| |
| // Push arguments to cgocallbackg. |
| // Frame size here must match the frame size above |
| // to trick traceback routines into doing the right thing. |
| SUBL $12, DI |
| MOVL AX, 0(DI) |
| MOVL BX, 4(DI) |
| MOVL DX, 8(DI) |
| |
| // Switch stack and make the call. |
| MOVL DI, SP |
| CALL runtime·cgocallbackg(SB) |
| |
| // Restore g->gobuf (== m->curg->gobuf) from saved values. |
| get_tls(CX) |
| MOVL g(CX), SI |
| MOVL 12(SP), BP |
| MOVL BP, (g_sched+gobuf_pc)(SI) |
| LEAL (12+4)(SP), DI |
| MOVL DI, (g_sched+gobuf_sp)(SI) |
| |
| // Switch back to m->g0's stack and restore m->g0->sched.sp. |
| // (Unlike m->curg, the g0 goroutine never uses sched.pc, |
| // so we do not have to restore it.) |
| MOVL m(CX), BP |
| MOVL m_g0(BP), SI |
| MOVL SI, g(CX) |
| MOVL (g_sched+gobuf_sp)(SI), SP |
| POPL (g_sched+gobuf_sp)(SI) |
| |
| // If the m on entry was nil, we called needm above to borrow an m |
| // for the duration of the call. Since the call is over, return it with dropm. |
| POPL BP |
| CMPL BP, $0 |
| JNE 3(PC) |
| MOVL $runtime·dropm(SB), AX |
| CALL AX |
| |
| // Done! |
| RET |
| |
| // void setmg(M*, G*); set m and g. for use by needm. |
| TEXT runtime·setmg(SB), 7, $0 |
| #ifdef GOOS_windows |
| MOVL mm+0(FP), AX |
| CMPL AX, $0 |
| JNE settls |
| MOVL $0, 0x14(FS) |
| RET |
| settls: |
| LEAL m_tls(AX), AX |
| MOVL AX, 0x14(FS) |
| #endif |
| MOVL mm+0(FP), AX |
| get_tls(CX) |
| MOVL mm+0(FP), AX |
| MOVL AX, m(CX) |
| MOVL gg+4(FP), BX |
| MOVL BX, g(CX) |
| RET |
| |
| // void setmg_gcc(M*, G*); set m and g. for use by gcc |
| TEXT setmg_gcc<>(SB), 7, $0 |
| get_tls(AX) |
| MOVL mm+0(FP), DX |
| MOVL DX, m(AX) |
| MOVL gg+4(FP), DX |
| MOVL DX,g (AX) |
| RET |
| |
| // check that SP is in range [g->stackbase, g->stackguard) |
| TEXT runtime·stackcheck(SB), 7, $0 |
| get_tls(CX) |
| MOVL g(CX), AX |
| CMPL g_stackbase(AX), SP |
| JHI 2(PC) |
| INT $3 |
| CMPL SP, g_stackguard(AX) |
| JHI 2(PC) |
| INT $3 |
| RET |
| |
| TEXT runtime·memclr(SB),7,$0 |
| MOVL 4(SP), DI // arg 1 addr |
| MOVL 8(SP), CX // arg 2 count |
| MOVL CX, BX |
| ANDL $3, BX |
| SHRL $2, CX |
| MOVL $0, AX |
| CLD |
| REP |
| STOSL |
| MOVL BX, CX |
| REP |
| STOSB |
| RET |
| |
| TEXT runtime·getcallerpc(SB),7,$0 |
| MOVL x+0(FP),AX // addr of first arg |
| MOVL -4(AX),AX // get calling pc |
| RET |
| |
| TEXT runtime·setcallerpc(SB),7,$0 |
| MOVL x+0(FP),AX // addr of first arg |
| MOVL x+4(FP), BX |
| MOVL BX, -4(AX) // set calling pc |
| RET |
| |
| TEXT runtime·getcallersp(SB), 7, $0 |
| MOVL sp+0(FP), AX |
| RET |
| |
| // int64 runtime·cputicks(void), so really |
| // void runtime·cputicks(int64 *ticks) |
| TEXT runtime·cputicks(SB),7,$0 |
| RDTSC |
| MOVL ret+0(FP), DI |
| MOVL AX, 0(DI) |
| MOVL DX, 4(DI) |
| RET |
| |
| TEXT runtime·ldt0setup(SB),7,$16 |
| // set up ldt 7 to point at tls0 |
| // ldt 1 would be fine on Linux, but on OS X, 7 is as low as we can go. |
| // the entry number is just a hint. setldt will set up GS with what it used. |
| MOVL $7, 0(SP) |
| LEAL runtime·tls0(SB), AX |
| MOVL AX, 4(SP) |
| MOVL $32, 8(SP) // sizeof(tls array) |
| CALL runtime·setldt(SB) |
| RET |
| |
| TEXT runtime·emptyfunc(SB),0,$0 |
| RET |
| |
| TEXT runtime·abort(SB),7,$0 |
| INT $0x3 |
| |
| TEXT runtime·stackguard(SB),7,$0 |
| MOVL SP, DX |
| MOVL DX, sp+0(FP) |
| get_tls(CX) |
| MOVL g(CX), BX |
| MOVL g_stackguard(BX), DX |
| MOVL DX, limit+4(FP) |
| RET |
| |
| GLOBL runtime·tls0(SB), $32 |
| |
| // hash function using AES hardware instructions |
| TEXT runtime·aeshash(SB),7,$0 |
| MOVL 4(SP), DX // ptr to hash value |
| MOVL 8(SP), CX // size |
| MOVL 12(SP), AX // ptr to data |
| JMP runtime·aeshashbody(SB) |
| |
| TEXT runtime·aeshashstr(SB),7,$0 |
| MOVL 4(SP), DX // ptr to hash value |
| MOVL 12(SP), AX // ptr to string struct |
| MOVL 4(AX), CX // length of string |
| MOVL (AX), AX // string data |
| JMP runtime·aeshashbody(SB) |
| |
| // AX: data |
| // CX: length |
| // DX: ptr to seed input / hash output |
| TEXT runtime·aeshashbody(SB),7,$0 |
| MOVL (DX), X0 // seed to low 32 bits of xmm0 |
| PINSRD $1, CX, X0 // size to next 32 bits of xmm0 |
| MOVO runtime·aeskeysched+0(SB), X2 |
| MOVO runtime·aeskeysched+16(SB), X3 |
| aesloop: |
| CMPL CX, $16 |
| JB aesloopend |
| MOVOU (AX), X1 |
| AESENC X2, X0 |
| AESENC X1, X0 |
| SUBL $16, CX |
| ADDL $16, AX |
| JMP aesloop |
| aesloopend: |
| TESTL CX, CX |
| JE finalize // no partial block |
| |
| TESTL $16, AX |
| JNE highpartial |
| |
| // address ends in 0xxxx. 16 bytes loaded |
| // at this address won't cross a page boundary, so |
| // we can load it directly. |
| MOVOU (AX), X1 |
| ADDL CX, CX |
| PAND masks(SB)(CX*8), X1 |
| JMP partial |
| highpartial: |
| // address ends in 1xxxx. Might be up against |
| // a page boundary, so load ending at last byte. |
| // Then shift bytes down using pshufb. |
| MOVOU -16(AX)(CX*1), X1 |
| ADDL CX, CX |
| PSHUFB shifts(SB)(CX*8), X1 |
| partial: |
| // incorporate partial block into hash |
| AESENC X3, X0 |
| AESENC X1, X0 |
| finalize: |
| // finalize hash |
| AESENC X2, X0 |
| AESENC X3, X0 |
| AESENC X2, X0 |
| MOVL X0, (DX) |
| RET |
| |
| TEXT runtime·aeshash32(SB),7,$0 |
| MOVL 4(SP), DX // ptr to hash value |
| MOVL 12(SP), AX // ptr to data |
| MOVL (DX), X0 // seed |
| PINSRD $1, (AX), X0 // data |
| AESENC runtime·aeskeysched+0(SB), X0 |
| AESENC runtime·aeskeysched+16(SB), X0 |
| AESENC runtime·aeskeysched+0(SB), X0 |
| MOVL X0, (DX) |
| RET |
| |
| TEXT runtime·aeshash64(SB),7,$0 |
| MOVL 4(SP), DX // ptr to hash value |
| MOVL 12(SP), AX // ptr to data |
| MOVQ (AX), X0 // data |
| PINSRD $2, (DX), X0 // seed |
| AESENC runtime·aeskeysched+0(SB), X0 |
| AESENC runtime·aeskeysched+16(SB), X0 |
| AESENC runtime·aeskeysched+0(SB), X0 |
| MOVL X0, (DX) |
| RET |
| |
| |
| // simple mask to get rid of data in the high part of the register. |
| TEXT masks(SB),7,$0 |
| LONG $0x00000000 |
| LONG $0x00000000 |
| LONG $0x00000000 |
| LONG $0x00000000 |
| |
| LONG $0x000000ff |
| LONG $0x00000000 |
| LONG $0x00000000 |
| LONG $0x00000000 |
| |
| LONG $0x0000ffff |
| LONG $0x00000000 |
| LONG $0x00000000 |
| LONG $0x00000000 |
| |
| LONG $0x00ffffff |
| LONG $0x00000000 |
| LONG $0x00000000 |
| LONG $0x00000000 |
| |
| LONG $0xffffffff |
| LONG $0x00000000 |
| LONG $0x00000000 |
| LONG $0x00000000 |
| |
| LONG $0xffffffff |
| LONG $0x000000ff |
| LONG $0x00000000 |
| LONG $0x00000000 |
| |
| LONG $0xffffffff |
| LONG $0x0000ffff |
| LONG $0x00000000 |
| LONG $0x00000000 |
| |
| LONG $0xffffffff |
| LONG $0x00ffffff |
| LONG $0x00000000 |
| LONG $0x00000000 |
| |
| LONG $0xffffffff |
| LONG $0xffffffff |
| LONG $0x00000000 |
| LONG $0x00000000 |
| |
| LONG $0xffffffff |
| LONG $0xffffffff |
| LONG $0x000000ff |
| LONG $0x00000000 |
| |
| LONG $0xffffffff |
| LONG $0xffffffff |
| LONG $0x0000ffff |
| LONG $0x00000000 |
| |
| LONG $0xffffffff |
| LONG $0xffffffff |
| LONG $0x00ffffff |
| LONG $0x00000000 |
| |
| LONG $0xffffffff |
| LONG $0xffffffff |
| LONG $0xffffffff |
| LONG $0x00000000 |
| |
| LONG $0xffffffff |
| LONG $0xffffffff |
| LONG $0xffffffff |
| LONG $0x000000ff |
| |
| LONG $0xffffffff |
| LONG $0xffffffff |
| LONG $0xffffffff |
| LONG $0x0000ffff |
| |
| LONG $0xffffffff |
| LONG $0xffffffff |
| LONG $0xffffffff |
| LONG $0x00ffffff |
| |
| // these are arguments to pshufb. They move data down from |
| // the high bytes of the register to the low bytes of the register. |
| // index is how many bytes to move. |
| TEXT shifts(SB),7,$0 |
| LONG $0x00000000 |
| LONG $0x00000000 |
| LONG $0x00000000 |
| LONG $0x00000000 |
| |
| LONG $0xffffff0f |
| LONG $0xffffffff |
| LONG $0xffffffff |
| LONG $0xffffffff |
| |
| LONG $0xffff0f0e |
| LONG $0xffffffff |
| LONG $0xffffffff |
| LONG $0xffffffff |
| |
| LONG $0xff0f0e0d |
| LONG $0xffffffff |
| LONG $0xffffffff |
| LONG $0xffffffff |
| |
| LONG $0x0f0e0d0c |
| LONG $0xffffffff |
| LONG $0xffffffff |
| LONG $0xffffffff |
| |
| LONG $0x0e0d0c0b |
| LONG $0xffffff0f |
| LONG $0xffffffff |
| LONG $0xffffffff |
| |
| LONG $0x0d0c0b0a |
| LONG $0xffff0f0e |
| LONG $0xffffffff |
| LONG $0xffffffff |
| |
| LONG $0x0c0b0a09 |
| LONG $0xff0f0e0d |
| LONG $0xffffffff |
| LONG $0xffffffff |
| |
| LONG $0x0b0a0908 |
| LONG $0x0f0e0d0c |
| LONG $0xffffffff |
| LONG $0xffffffff |
| |
| LONG $0x0a090807 |
| LONG $0x0e0d0c0b |
| LONG $0xffffff0f |
| LONG $0xffffffff |
| |
| LONG $0x09080706 |
| LONG $0x0d0c0b0a |
| LONG $0xffff0f0e |
| LONG $0xffffffff |
| |
| LONG $0x08070605 |
| LONG $0x0c0b0a09 |
| LONG $0xff0f0e0d |
| LONG $0xffffffff |
| |
| LONG $0x07060504 |
| LONG $0x0b0a0908 |
| LONG $0x0f0e0d0c |
| LONG $0xffffffff |
| |
| LONG $0x06050403 |
| LONG $0x0a090807 |
| LONG $0x0e0d0c0b |
| LONG $0xffffff0f |
| |
| LONG $0x05040302 |
| LONG $0x09080706 |
| LONG $0x0d0c0b0a |
| LONG $0xffff0f0e |
| |
| LONG $0x04030201 |
| LONG $0x08070605 |
| LONG $0x0c0b0a09 |
| LONG $0xff0f0e0d |
| |
| TEXT runtime·memeq(SB),7,$0 |
| MOVL a+0(FP), SI |
| MOVL b+4(FP), DI |
| MOVL count+8(FP), BX |
| JMP runtime·memeqbody(SB) |
| |
| |
| TEXT bytes·Equal(SB),7,$0 |
| MOVL a_len+4(FP), BX |
| MOVL b_len+16(FP), CX |
| XORL AX, AX |
| CMPL BX, CX |
| JNE eqret |
| MOVL a+0(FP), SI |
| MOVL b+12(FP), DI |
| CALL runtime·memeqbody(SB) |
| eqret: |
| MOVB AX, ret+24(FP) |
| RET |
| |
| // a in SI |
| // b in DI |
| // count in BX |
| TEXT runtime·memeqbody(SB),7,$0 |
| XORL AX, AX |
| |
| CMPL BX, $4 |
| JB small |
| |
| // 64 bytes at a time using xmm registers |
| hugeloop: |
| CMPL BX, $64 |
| JB bigloop |
| TESTL $0x4000000, runtime·cpuid_edx(SB) // check for sse2 |
| JE bigloop |
| MOVOU (SI), X0 |
| MOVOU (DI), X1 |
| MOVOU 16(SI), X2 |
| MOVOU 16(DI), X3 |
| MOVOU 32(SI), X4 |
| MOVOU 32(DI), X5 |
| MOVOU 48(SI), X6 |
| MOVOU 48(DI), X7 |
| PCMPEQB X1, X0 |
| PCMPEQB X3, X2 |
| PCMPEQB X5, X4 |
| PCMPEQB X7, X6 |
| PAND X2, X0 |
| PAND X6, X4 |
| PAND X4, X0 |
| PMOVMSKB X0, DX |
| ADDL $64, SI |
| ADDL $64, DI |
| SUBL $64, BX |
| CMPL DX, $0xffff |
| JEQ hugeloop |
| RET |
| |
| // 4 bytes at a time using 32-bit register |
| bigloop: |
| CMPL BX, $4 |
| JBE leftover |
| MOVL (SI), CX |
| MOVL (DI), DX |
| ADDL $4, SI |
| ADDL $4, DI |
| SUBL $4, BX |
| CMPL CX, DX |
| JEQ bigloop |
| RET |
| |
| // remaining 0-4 bytes |
| leftover: |
| MOVL -4(SI)(BX*1), CX |
| MOVL -4(DI)(BX*1), DX |
| CMPL CX, DX |
| SETEQ AX |
| RET |
| |
| small: |
| CMPL BX, $0 |
| JEQ equal |
| |
| LEAL 0(BX*8), CX |
| NEGL CX |
| |
| MOVL SI, DX |
| CMPB DX, $0xfc |
| JA si_high |
| |
| // load at SI won't cross a page boundary. |
| MOVL (SI), SI |
| JMP si_finish |
| si_high: |
| // address ends in 111111xx. Load up to bytes we want, move to correct position. |
| MOVL -4(SI)(BX*1), SI |
| SHRL CX, SI |
| si_finish: |
| |
| // same for DI. |
| MOVL DI, DX |
| CMPB DX, $0xfc |
| JA di_high |
| MOVL (DI), DI |
| JMP di_finish |
| di_high: |
| MOVL -4(DI)(BX*1), DI |
| SHRL CX, DI |
| di_finish: |
| |
| SUBL SI, DI |
| SHLL CX, DI |
| equal: |
| SETEQ AX |
| RET |
