*/
\f
#define LANGUAGE_ASSEMBLY
-#include "validate.h"
#include "sbcl.h"
-
-/* Minimize conditionalization for different OS naming schemes. */
-#if defined __linux__ || defined __FreeBSD__ /* (but *not* OpenBSD) */
+#include "validate.h"
+#include "genesis/closure.h"
+#include "genesis/funcallable-instance.h"
+#include "genesis/fdefn.h"
+#include "genesis/static-symbols.h"
+#include "genesis/symbol.h"
+#include "genesis/thread.h"
+
+/* Minimize conditionalization for different OS naming schemes.
+ *
+ * (As of sbcl-0.8.10, this seems no longer to be much of an issue,
+ * since everyone has converged on ELF. If this generality really
+ * turns out not to matter, perhaps it's just clutter we could get
+ * rid of? -- WHN 2004-04-18)
+ *
+ * (Except Win32, which is unlikely ever to be ELF, sorry. -- AB 2005-12-08)
+ */
+#if defined __linux__ || defined __FreeBSD__ || defined __NetBSD__ || defined __OpenBSD__ || defined __sun
#define GNAME(var) var
#else
#define GNAME(var) _##var
#endif
-/* Get the right type of alignment. Linux and FreeBSD (but not OpenBSD)
- * want alignment in bytes. */
-#if defined(__linux__) || defined(__FreeBSD__)
+/* Get the right type of alignment. Linux, FreeBSD and NetBSD (but not OpenBSD)
+ * want alignment in bytes.
+ *
+ * (As in the GNAME() definitions above, as of sbcl-0.8.10, this seems
+ * no longer to be much of an issue, since everyone has converged on
+ * the same value. If this generality really turns out not to
+ * matter any more, perhaps it's just clutter we could get
+ * rid of? -- WHN 2004-04-18)
+ */
+#if defined(__linux__) || defined(__FreeBSD__) || defined(__NetBSD__) || defined(__OpenBSD__) || defined(__sun) || defined(LISP_FEATURE_WIN32)
#define align_4byte 4
#define align_8byte 8
#define align_16byte 16
#define align_16byte 4
#endif
+/*
+ * The assembler used for win32 doesn't like .type or .size directives,
+ * so we want to conditionally kill them out. So let's wrap them in macros
+ * that are defined to be no-ops on win32. Hopefully this still works on
+ * other platforms.
+ */
+#if !defined(LISP_FEATURE_WIN32) && !defined(LISP_FEATURE_DARWIN)
+#define TYPE(name) .type name,@function
+#define SIZE(name) .size name,.-name
+#else
+#define TYPE(name)
+#define SIZE(name)
+#endif
+
+/*
+ * x86/darwin (as of MacOS X 10.4.5) doesn't reliably file signal
+ * handlers (SIGTRAP or Mach exception handlers) for 0xCC, wo we have
+ * to use ud2 instead. ud2 is an undefined opcode, #x0b0f, or
+ * 0F 0B in low-endian notation, that causes SIGILL to fire. We check
+ * for this instruction in the SIGILL handler and if we see it, we
+ * advance the EIP by two bytes to skip over ud2 instruction and
+ * call sigtrap_handler. */
+#if defined(LISP_FEATURE_DARWIN)
+#define END()
+#define TRAP ud2
+#else
+#define END() .end
+#define TRAP int3
+#endif
+
.text
- .global GNAME(foreign_function_call_active)
-
+ .globl GNAME(all_threads)
\f
/*
* A call to call_into_c preserves esi, edi, and ebp.
* floats.
*
* This should work for Lisp calls C calls Lisp calls C..
+ *
+ * FIXME & OAOOM: This duplicates call-out in src/compiler/x86/c-call.lisp,
+ * so if you tweak this, change that too!
*/
.text
.align align_16byte,0x90
- .global GNAME(call_into_c)
- .type GNAME(call_into_c),@function
+ .globl GNAME(call_into_c)
+ TYPE(GNAME(call_into_c))
GNAME(call_into_c):
- movl $1,GNAME(foreign_function_call_active)
-
/* Save the return Lisp address in ebx. */
popl %ebx
fstp %st(0)
fstp %st(0)
- call *%eax # normal callout using Lisp stack
-
- movl %eax,%ecx # remember integer return value
+ call *%eax # normal callout using Lisp stack
+ movl %eax,%ecx # remember integer return value
/* Check for a return FP value. */
fxam
- fnstsw %eax
+ fnstsw %ax
andl $0x4500,%eax
cmpl $0x4100,%eax
jne Lfp_rtn_value
/* Restore the return value. */
movl %ecx,%eax # maybe return value
- movl $0,GNAME(foreign_function_call_active)
/* Return. */
jmp *%ebx
/* We don't need to restore eax, because the result is in st(0). */
- movl $0,GNAME(foreign_function_call_active)
-/* Return. */
+/* Return. FIXME: It would be nice to restructure this to use RET. */
jmp *%ebx
- .size GNAME(call_into_c), . - GNAME(call_into_c)
+ SIZE(GNAME(call_into_c))
\f
.text
- .global GNAME(call_into_lisp)
- .type GNAME(call_into_lisp),@function
+ .globl GNAME(call_into_lisp_first_time)
+ TYPE(GNAME(call_into_lisp_first_time))
+
+/* The *ALIEN-STACK* pointer is set up on the first call_into_lisp when
+ * the stack changes. We don't worry too much about saving registers
+ * here, because we never expect to return from the initial call to lisp
+ * anyway */
+
+ .align align_16byte,0x90
+GNAME(call_into_lisp_first_time):
+ pushl %ebp # Save old frame pointer.
+ movl %esp,%ebp # Establish new frame.
+#ifndef LISP_FEATURE_WIN32
+ movl %esp,ALIEN_STACK + SYMBOL_VALUE_OFFSET
+ movl GNAME(all_threads),%eax
+ /* pthread machinery takes care of this for other threads */
+ movl THREAD_CONTROL_STACK_END_OFFSET(%eax) ,%esp
+#else
+/* Win32 -really- doesn't like you switching stacks out from under it. */
+ movl GNAME(all_threads),%eax
+#endif
+ jmp Lstack
+\f
+ .text
+ .globl GNAME(call_into_lisp)
+ TYPE(GNAME(call_into_lisp))
/* The C conventions require that ebx, esi, edi, and ebp be preserved
* across function calls. */
-/* The *ALIEN-STACK* pointer is set up on the first call_into_lisp when
- * the stack changes. */
.align align_16byte,0x90
GNAME(call_into_lisp):
pushl %ebp # Save old frame pointer.
movl %esp,%ebp # Establish new frame.
-
+Lstack:
/* Save the NPX state */
fwait # Catch any pending NPX exceptions.
subl $108,%esp # Make room for the NPX state.
- fnsave (%esp) # resets NPX
+ fnsave (%esp) # save and reset NPX
movl (%esp),%eax # Load NPX control word.
- andl $0xfffff3ff,%eax # Set rounding mode to nearest.
- orl $0x00000300,%eax # Set precision to 64 bits.
+ andl $0xfffff2ff,%eax # Set rounding mode to nearest.
+ orl $0x00000200,%eax # Set precision to 64 bits. (53-bit mantissa)
pushl %eax
fldcw (%esp) # Recover modes.
popl %eax
xorl %esi,%esi # third arg
/* no longer in function call */
- movl %eax, GNAME(foreign_function_call_active)
-
movl %esp,%ebx # remember current stack
- cmpl $CONTROL_STACK_START,%esp
- jbe ChangeToLispStack
- cmpl $CONTROL_STACK_END,%esp
- jbe OnLispStack
-ChangeToLispStack:
- /* Setup the *alien-stack* pointer */
- movl %esp,ALIEN_STACK + SYMBOL_VALUE_OFFSET
- movl $CONTROL_STACK_END,%esp # new stack
-OnLispStack:
pushl %ebx # Save entry stack on (maybe) new stack.
/* Establish Lisp args. */
Ldone:
/* Registers eax, ecx, edx, edi, and esi are now live. */
+#ifdef LISP_FEATURE_WIN32
+ /* Establish an SEH frame. */
+#ifdef LISP_FEATURE_SB_THREAD
+ /* FIXME: need to save BSP here. */
+#error "need to save BSP here, but don't know how yet."
+#else
+ pushl BINDING_STACK_POINTER + SYMBOL_VALUE_OFFSET
+#endif
+ pushl $GNAME(exception_handler_wrapper)
+ pushl %fs:0
+ movl %esp, %fs:0
+#endif
+
/* Alloc new frame. */
mov %esp,%ebx # The current sp marks start of new frame.
push %ebp # fp in save location S0
sub $8,%esp # Ensure 3 slots are allocated, one above.
mov %ebx,%ebp # Switch to new frame.
- /* Indirect the closure. */
- call *CLOSURE_FUNCTION_OFFSET(%eax)
+ call *CLOSURE_FUN_OFFSET(%eax)
- /* Multi-value return; blow off any extra values. */
+ /* If the function returned multiple values, it will return to
+ this point. Lose them */
+ jnc LsingleValue
mov %ebx, %esp
- /* single value return */
+LsingleValue:
+ /* A singled value function returns here */
+
+#ifdef LISP_FEATURE_WIN32
+ /* Remove our SEH frame. */
+ popl %fs:0
+ add $8, %esp
+#endif
/* Restore the stack, in case there was a stack change. */
popl %esp # c-sp
popl %ebp # c-sp
movl %edx,%eax # c-val
ret
- .size GNAME(call_into_lisp), . - GNAME(call_into_lisp)
+ SIZE(GNAME(call_into_lisp))
\f
/* support for saving and restoring the NPX state from C */
.text
- .global GNAME(fpu_save)
- .type GNAME(fpu_save),@function
+ .globl GNAME(fpu_save)
+ TYPE(GNAME(fpu_save))
.align 2,0x90
GNAME(fpu_save):
movl 4(%esp),%eax
fnsave (%eax) # Save the NPX state. (resets NPX)
ret
- .size GNAME(fpu_save),.-GNAME(fpu_save)
+ SIZE(GNAME(fpu_save))
- .global GNAME(fpu_restore)
- .type GNAME(fpu_restore),@function
+ .globl GNAME(fpu_restore)
+ TYPE(GNAME(fpu_restore))
.align 2,0x90
GNAME(fpu_restore):
movl 4(%esp),%eax
frstor (%eax) # Restore the NPX state.
ret
- .size GNAME(fpu_restore),.-GNAME(fpu_restore)
+ SIZE(GNAME(fpu_restore))
\f
/*
* the undefined-function trampoline
*/
.text
.align align_4byte,0x90
- .global GNAME(undefined_tramp)
- .type GNAME(undefined_tramp),@function
+ .globl GNAME(undefined_tramp)
+ TYPE(GNAME(undefined_tramp))
+ .byte 0, 0, 0, SIMPLE_FUN_HEADER_WIDETAG
GNAME(undefined_tramp):
- int3
+ TRAP
.byte trap_Error
.byte 2
-#ifdef type_LongFloat
- .byte 24
-#else
- .byte 23
-#endif
+ .byte UNDEFINED_FUN_ERROR
.byte sc_DescriptorReg # eax in the Descriptor-reg SC
ret
- .size GNAME(undefined_tramp), .-GNAME(undefined_tramp)
+ SIZE(GNAME(undefined_tramp))
/*
* the closure trampoline
*/
.text
.align align_4byte,0x90
- .global GNAME(closure_tramp)
- .type GNAME(closure_tramp),@function
+ .globl GNAME(closure_tramp)
+ TYPE(GNAME(closure_tramp))
+ .byte 0, 0, 0, SIMPLE_FUN_HEADER_WIDETAG
GNAME(closure_tramp):
- movl FDEFN_FUNCTION_OFFSET(%eax),%eax
+ movl FDEFN_FUN_OFFSET(%eax),%eax
/* FIXME: The '*' after "jmp" in the next line is from PVE's
* patch posted to the CMU CL mailing list Oct 6, 1999. It looks
* reasonable, and it certainly seems as though if CMU CL needs it,
* SBCL needs it too, but I haven't actually verified that it's
* right. It would be good to find a way to force the flow of
* control through here to test it. */
- jmp *CLOSURE_FUNCTION_OFFSET(%eax)
- .size GNAME(closure_tramp), .-GNAME(closure_tramp)
+ jmp *CLOSURE_FUN_OFFSET(%eax)
+ SIZE(GNAME(closure_tramp))
+ .text
+ .align align_4byte,0x90
+ .globl GNAME(funcallable_instance_tramp)
+ TYPE(GNAME(funcallable_instance_tramp))
+GNAME(funcallable_instance_tramp):
+ movl FUNCALLABLE_INSTANCE_FUNCTION_OFFSET(%eax),%eax
+ /* KLUDGE: on this platform, whatever kind of function is in %rax
+ * now, the first word of it contains the address to jump to. */
+ jmp *CLOSURE_FUN_OFFSET(%eax)
+ SIZE(GNAME(funcallable_instance_tramp))
+
/*
- * function-end breakpoint magic
+ * fun-end breakpoint magic
*/
.text
- .global GNAME(function_end_breakpoint_guts)
+ .globl GNAME(fun_end_breakpoint_guts)
.align align_4byte
-GNAME(function_end_breakpoint_guts):
+GNAME(fun_end_breakpoint_guts):
/* Multiple Value return */
- jmp multiple_value_return
+ jc multiple_value_return
/* Single value return: The eventual return will now use the
multiple values return convention but with a return values
count of one. */
movl %esp,%ebx # Setup ebx - the ofp.
subl $4,%esp # Allocate one stack slot for the return value
movl $4,%ecx # Setup ecx for one return value.
- movl $NIL,%edi # default second value
- movl $NIL,%esi # default third value
+ movl $(NIL),%edi # default second value
+ movl $(NIL),%esi # default third value
multiple_value_return:
- .global GNAME(function_end_breakpoint_trap)
-GNAME(function_end_breakpoint_trap):
- int3
- .byte trap_FunctionEndBreakpoint
+ .globl GNAME(fun_end_breakpoint_trap)
+GNAME(fun_end_breakpoint_trap):
+ TRAP
+ .byte trap_FunEndBreakpoint
hlt # We should never return here.
- .global GNAME(function_end_breakpoint_end)
-GNAME(function_end_breakpoint_end):
+ .globl GNAME(fun_end_breakpoint_end)
+GNAME(fun_end_breakpoint_end):
\f
- .global GNAME(do_pending_interrupt)
- .type GNAME(do_pending_interrupt),@function
+ .globl GNAME(do_pending_interrupt)
+ TYPE(GNAME(do_pending_interrupt))
.align align_4byte,0x90
GNAME(do_pending_interrupt):
- int3
+ TRAP
.byte trap_PendingInterrupt
ret
- .size GNAME(do_pending_interrupt),.-GNAME(do_pending_interrupt)
+ SIZE(GNAME(do_pending_interrupt))
\f
-#ifdef WANT_CGC
-/* This is a copy function which is optimized for the Pentium and
- * works OK on 486 as well. This assumes (does not check) that the
- * input byte count is a multiple of 8 bytes (one Lisp object).
- * This code takes advantage of pairing in the Pentium as well
- * as the 128-bit cache line.
- */
- .global GNAME(fastcopy16)
- .type GNAME(fastcopy16),@function
- .align align_4byte,0x90
-GNAME(fastcopy16):
- pushl %ebp
- movl %esp,%ebp
- movl 8(%ebp), %edx # dst
- movl 12(%ebp),%eax # src
- movl 16(%ebp),%ecx # bytes
- pushl %ebx
- pushl %esi
- pushl %edi
- movl %edx,%edi
- movl %eax,%esi
- sarl $3,%ecx # number 8-byte units
- testl $1,%ecx # odd?
- jz Lquad
- movl (%esi),%eax
- movl 4(%esi),%ebx
- movl %eax,(%edi)
- movl %ebx,4(%edi)
- leal 8(%esi),%esi
- leal 8(%edi),%edi
-Lquad: sarl $1,%ecx # count 16-byte units
- jz Lend
- movl %ecx,%ebp # use ebp for loop counter
- .align align_16byte,0x90
-Ltop:
- movl (%edi),%eax # prefetch! MAJOR Pentium win..
- movl (%esi),%eax
- movl 4(%esi),%ebx
- movl 8(%esi),%ecx
- movl 12(%esi),%edx
- movl %eax, (%edi)
- movl %ebx, 4(%edi)
- movl %ecx, 8(%edi)
- movl %edx,12(%edi)
- leal 16(%esi),%esi
- leal 16(%edi),%edi
- decl %ebp
- jnz Ltop # non-prefixed jump saves cycles
-Lend:
- popl %edi
- popl %esi
- popl %ebx
- popl %ebp
- ret
- .size GNAME(fastcopy16),.-GNAME(fastcopy16)
-#endif
-\f
-#ifdef GENCGC
-/* This is a fast bzero using the FPU. The first argument is the start
- * address which needs to be aligned on an 8 byte boundary, the second
- * argument is the number of bytes, which must be a nonzero multiple
- * of 8 bytes. */
- .text
- .globl GNAME(i586_bzero)
- .type GNAME(i586_bzero),@function
- .align align_4byte,0x90
-GNAME(i586_bzero):
- movl 4(%esp),%edx # Load the start address.
- movl 8(%esp),%eax # Load the number of bytes.
- fldz
-l1: fstl 0(%edx)
- addl $8,%edx
- subl $8,%eax
- jnz l1
- fstp %st(0)
- ret
- .size GNAME(i586_bzero),.-GNAME(i586_bzero)
-#endif
-\f
-
-/*
- * Allocate bytes and return the start of the allocated space
+/* Allocate bytes and return the start of the allocated space
* in the specified destination register.
*
* In the general case the size will be in the destination register.
* All registers must be preserved except the destination.
* The C conventions will preserve ebx, esi, edi, and ebp.
* So only eax, ecx, and edx need special care here.
+ *
+ * ALLOC factors out the logic of calling alloc(): stack alignment, etc.
+ *
+ * DEFINE_ALLOC_TO_FOO defines an alloction routine.
*/
-
- .globl GNAME(alloc_to_eax)
- .type GNAME(alloc_to_eax),@function
- .align align_4byte,0x90
-GNAME(alloc_to_eax):
- pushl %ecx # Save ecx and edx as C could destroy them.
- pushl %edx
- pushl %eax # Push the size.
- call GNAME(alloc)
- addl $4,%esp # Pop the size arg.
- popl %edx # Restore ecx and edx.
- popl %ecx
- ret
- .size GNAME(alloc_to_eax),.-GNAME(alloc_to_eax)
-
- .globl GNAME(alloc_8_to_eax)
- .type GNAME(alloc_8_to_eax),@function
- .align align_4byte,0x90
-GNAME(alloc_8_to_eax):
- pushl %ecx # Save ecx and edx as C could destroy them.
- pushl %edx
- pushl $8 # Push the size.
- call GNAME(alloc)
- addl $4,%esp # Pop the size arg.
- popl %edx # Restore ecx and edx.
- popl %ecx
- ret
- .size GNAME(alloc_8_to_eax),.-GNAME(alloc_8_to_eax)
-
- .globl GNAME(alloc_8_to_eax)
- .type GNAME(alloc_8_to_eax),@function
- .align align_4byte,0x90
-
- .globl GNAME(alloc_16_to_eax)
- .type GNAME(alloc_16_to_eax),@function
- .align align_4byte,0x90
-GNAME(alloc_16_to_eax):
- pushl %ecx # Save ecx and edx as C could destroy them.
- pushl %edx
- pushl $16 # Push the size.
- call GNAME(alloc)
- addl $4,%esp # Pop the size arg.
- popl %edx # Restore ecx and edx.
- popl %ecx
- ret
- .size GNAME(alloc_16_to_eax),.-GNAME(alloc_16_to_eax)
-
- .globl GNAME(alloc_to_ecx)
- .type GNAME(alloc_to_ecx),@function
- .align align_4byte,0x90
-GNAME(alloc_to_ecx):
- pushl %eax # Save eax and edx as C could destroy them.
- pushl %edx
- pushl %ecx # Push the size.
- call GNAME(alloc)
- addl $4,%esp # Pop the size arg.
- movl %eax,%ecx # Set up the destination.
- popl %edx # Restore eax and edx.
- popl %eax
- ret
- .size GNAME(alloc_to_ecx),.-GNAME(alloc_to_ecx)
-
- .globl GNAME(alloc_8_to_ecx)
- .type GNAME(alloc_8_to_ecx),@function
- .align align_4byte,0x90
-GNAME(alloc_8_to_ecx):
- pushl %eax # Save eax and edx as C could destroy them.
- pushl %edx
- pushl $8 # Push the size.
- call GNAME(alloc)
- addl $4,%esp # Pop the size arg.
- movl %eax,%ecx # Set up the destination.
- popl %edx # Restore eax and edx.
- popl %eax
- ret
- .size GNAME(alloc_8_to_ecx),.-GNAME(alloc_8_to_ecx)
-
- .globl GNAME(alloc_16_to_ecx)
- .type GNAME(alloc_16_to_ecx),@function
- .align align_4byte,0x90
-GNAME(alloc_16_to_ecx):
- pushl %eax # Save eax and edx as C could destroy them.
- pushl %edx
- pushl $16 # Push the size.
- call GNAME(alloc)
- addl $4,%esp # Pop the size arg.
- movl %eax,%ecx # Set up the destination.
- popl %edx # Restore eax and edx.
- popl %eax
- ret
- .size GNAME(alloc_16_to_ecx),.-GNAME(alloc_16_to_ecx)
-
- .globl GNAME(alloc_to_edx)
- .type GNAME(alloc_to_edx),@function
- .align align_4byte,0x90
-GNAME(alloc_to_edx):
- pushl %eax # Save eax and ecx as C could destroy them.
- pushl %ecx
- pushl %edx # Push the size.
- call GNAME(alloc)
- addl $4,%esp # Pop the size arg.
- movl %eax,%edx # Set up the destination.
- popl %ecx # Restore eax and ecx.
- popl %eax
- ret
- .size GNAME(alloc_to_edx),.-GNAME(alloc_to_edx)
-
- .globl GNAME(alloc_8_to_edx)
- .type GNAME(alloc_8_to_edx),@function
- .align align_4byte,0x90
-GNAME(alloc_8_to_edx):
- pushl %eax # Save eax and ecx as C could destroy them.
- pushl %ecx
- pushl $8 # Push the size.
- call GNAME(alloc)
- addl $4,%esp # Pop the size arg.
- movl %eax,%edx # Set up the destination.
- popl %ecx # Restore eax and ecx.
- popl %eax
- ret
- .size GNAME(alloc_8_to_edx),.-GNAME(alloc_8_to_edx)
-
- .globl GNAME(alloc_16_to_edx)
- .type GNAME(alloc_16_to_edx),@function
- .align align_4byte,0x90
-GNAME(alloc_16_to_edx):
- pushl %eax # Save eax and ecx as C could destroy them.
- pushl %ecx
- pushl $16 # Push the size.
- call GNAME(alloc)
- addl $4,%esp # Pop the size arg.
- movl %eax,%edx # Set up the destination.
- popl %ecx # Restore eax and ecx.
- popl %eax
- ret
- .size GNAME(alloc_16_to_edx),.-GNAME(alloc_16_to_edx)
-
-
-
- .globl GNAME(alloc_to_ebx)
- .type GNAME(alloc_to_ebx),@function
- .align align_4byte,0x90
-GNAME(alloc_to_ebx):
- pushl %eax # Save eax, ecx, and edx as C could destroy them.
- pushl %ecx
- pushl %edx
- pushl %ebx # Push the size.
- call GNAME(alloc)
- addl $4,%esp # Pop the size arg.
- movl %eax,%ebx # Set up the destination.
- popl %edx # Restore eax, ecx and edx.
- popl %ecx
- popl %eax
- ret
- .size GNAME(alloc_to_ebx),.-GNAME(alloc_to_ebx)
-
- .globl GNAME(alloc_8_to_ebx)
- .type GNAME(alloc_8_to_ebx),@function
- .align align_4byte,0x90
-GNAME(alloc_8_to_ebx):
- pushl %eax # Save eax, ecx, and edx as C could destroy them.
- pushl %ecx
- pushl %edx
- pushl $8 # Push the size.
- call GNAME(alloc)
- addl $4,%esp # Pop the size arg.
- movl %eax,%ebx # Set up the destination.
- popl %edx # Restore eax, ecx and edx.
- popl %ecx
- popl %eax
- ret
- .size GNAME(alloc_8_to_ebx),.-GNAME(alloc_8_to_ebx)
-
- .globl GNAME(alloc_16_to_ebx)
- .type GNAME(alloc_16_to_ebx),@function
- .align align_4byte,0x90
-GNAME(alloc_16_to_ebx):
- pushl %eax # Save eax, ecx, and edx as C could destroy them.
- pushl %ecx
- pushl %edx
- pushl $16 # Push the size
- call GNAME(alloc)
- addl $4,%esp # pop the size arg.
- movl %eax,%ebx # setup the destination.
- popl %edx # Restore eax, ecx and edx.
- popl %ecx
- popl %eax
- ret
- .size GNAME(alloc_16_to_ebx),.-GNAME(alloc_16_to_ebx)
-
-
-
- .globl GNAME(alloc_to_esi)
- .type GNAME(alloc_to_esi),@function
- .align align_4byte,0x90
-GNAME(alloc_to_esi):
- pushl %eax # Save eax, ecx, and edx as C could destroy them.
- pushl %ecx
- pushl %edx
- pushl %esi # Push the size
- call GNAME(alloc)
- addl $4,%esp # pop the size arg.
- movl %eax,%esi # setup the destination.
- popl %edx # Restore eax, ecx and edx.
- popl %ecx
- popl %eax
- ret
- .size GNAME(alloc_to_esi),.-GNAME(alloc_to_esi)
-
- .globl GNAME(alloc_8_to_esi)
- .type GNAME(alloc_8_to_esi),@function
- .align align_4byte,0x90
-GNAME(alloc_8_to_esi):
- pushl %eax # Save eax, ecx, and edx as C could destroy them.
- pushl %ecx
- pushl %edx
- pushl $8 # Push the size
- call GNAME(alloc)
- addl $4,%esp # pop the size arg.
- movl %eax,%esi # setup the destination.
- popl %edx # Restore eax, ecx and edx.
- popl %ecx
- popl %eax
- ret
- .size GNAME(alloc_8_to_esi),.-GNAME(alloc_8_to_esi)
-
- .globl GNAME(alloc_16_to_esi)
- .type GNAME(alloc_16_to_esi),@function
- .align align_4byte,0x90
-GNAME(alloc_16_to_esi):
- pushl %eax # Save eax, ecx, and edx as C could destroy them.
- pushl %ecx
- pushl %edx
- pushl $16 # Push the size
- call GNAME(alloc)
- addl $4,%esp # pop the size arg.
- movl %eax,%esi # setup the destination.
- popl %edx # Restore eax, ecx and edx.
- popl %ecx
- popl %eax
- ret
- .size GNAME(alloc_16_to_esi),.-GNAME(alloc_16_to_esi)
-
-
- .globl GNAME(alloc_to_edi)
- .type GNAME(alloc_to_edi),@function
- .align align_4byte,0x90
-GNAME(alloc_to_edi):
- pushl %eax # Save eax, ecx, and edx as C could destroy them.
- pushl %ecx
- pushl %edx
- pushl %edi # Push the size
- call GNAME(alloc)
- addl $4,%esp # pop the size arg.
- movl %eax,%edi # setup the destination.
- popl %edx # Restore eax, ecx and edx.
- popl %ecx
- popl %eax
- ret
- .size GNAME(alloc_to_edi),.-GNAME(alloc_to_edi)
-
- .globl GNAME(alloc_8_to_edi)
- .type GNAME(alloc_8_to_edi),@function
- .align align_4byte,0x90
-GNAME(alloc_8_to_edi):
- pushl %eax # Save eax, ecx, and edx as C could destroy them.
- pushl %ecx
- pushl %edx
- pushl $8 # Push the size
- call GNAME(alloc)
- addl $4,%esp # pop the size arg.
- movl %eax,%edi # setup the destination.
- popl %edx # Restore eax, ecx and edx.
- popl %ecx
- popl %eax
- ret
- .size GNAME(alloc_8_to_edi),.-GNAME(alloc_8_to_edi)
-
- .globl GNAME(alloc_16_to_edi)
- .type GNAME(alloc_16_to_edi),@function
- .align align_4byte,0x90
-GNAME(alloc_16_to_edi):
- pushl %eax # Save eax, ecx, and edx as C could destroy them.
- pushl %ecx
- pushl %edx
- pushl $16 # Push the size
- call GNAME(alloc)
- addl $4,%esp # pop the size arg.
- movl %eax,%edi # setup the destination.
- popl %edx # Restore eax, ecx and edx.
- popl %ecx
- popl %eax
- ret
- .size GNAME(alloc_16_to_edi),.-GNAME(alloc_16_to_edi)
-
-
-\f
-#ifdef GENCGC
+#ifdef LISP_FEATURE_DARWIN
+#define ALLOC(size) \
+ pushl %ebp; /* Save EBP */ \
+ movl %esp,%ebp; /* Save ESP to EBP */ \
+ andl $0xfffffff0,%esp; /* Align stack */ \
+ pushl $0; /* Padding */ \
+ pushl size; /* Argument to alloc */ \
+ call GNAME(alloc); \
+ movl %ebp,%esp; /* Restore ESP from EBP */ \
+ popl %ebp; /* Restore EBP */
+#else
+#define ALLOC(size) \
+ pushl size; /* Argument to alloc */ \
+ call GNAME(alloc); \
+ addl $4,%esp; /* Pop argument */
+#endif
-/* These routines are called from Lisp when an inline allocation
- * overflows. Every register except the result needs to be preserved.
+#define DEFINE_ALLOC_TO_EAX(name,size) \
+ .globl GNAME(name); \
+ TYPE(GNAME(name)); \
+ .align align_4byte,0x90; \
+GNAME(name): \
+ pushl %ecx; /* Save ECX and EDX */ \
+ pushl %edx; \
+ ALLOC(size) \
+ popl %edx; /* Restore ECX and EDX */ \
+ popl %ecx; \
+ ret; \
+ SIZE(GNAME(name))
+
+#define DEFINE_ALLOC_TO_ECX(name,size) \
+ .globl GNAME(name); \
+ TYPE(GNAME(name)); \
+ .align align_4byte,0x90; \
+GNAME(name): \
+ pushl %eax; /* Save EAX and EDX */ \
+ pushl %edx; \
+ ALLOC(size) \
+ movl %eax,%ecx; /* Result to destination */ \
+ popl %edx; \
+ popl %eax; \
+ ret; \
+ SIZE(GNAME(name))
+
+#define DEFINE_ALLOC_TO_EDX(name,size) \
+ .globl GNAME(name); \
+ TYPE(GNAME(name)); \
+ .align align_4byte,0x90; \
+GNAME(name): \
+ pushl %eax; /* Save EAX and ECX */ \
+ pushl %ecx; \
+ ALLOC(size) \
+ movl %eax,%edx; /* Restore EAX and ECX */ \
+ popl %ecx; \
+ popl %eax; \
+ ret; \
+ SIZE(GNAME(name))
+
+#define DEFINE_ALLOC_TO_REG(name,reg,size) \
+ .globl GNAME(name); \
+ TYPE(GNAME(name)); \
+ .align align_4byte,0x90; \
+GNAME(name): \
+ pushl %eax; /* Save EAX, ECX, and EDX */ \
+ pushl %ecx; \
+ pushl %edx; \
+ ALLOC(size) \
+ movl %eax,reg; /* Restore them */ \
+ popl %edx; \
+ popl %ecx; \
+ popl %eax; \
+ ret; \
+ SIZE(GNAME(name))
+
+DEFINE_ALLOC_TO_EAX(alloc_to_eax,%eax)
+DEFINE_ALLOC_TO_EAX(alloc_8_to_eax,$8)
+DEFINE_ALLOC_TO_EAX(alloc_16_to_eax,$16)
+
+DEFINE_ALLOC_TO_ECX(alloc_to_ecx,%ecx)
+DEFINE_ALLOC_TO_ECX(alloc_8_to_ecx,$8)
+DEFINE_ALLOC_TO_ECX(alloc_16_to_ecx,$16)
+
+DEFINE_ALLOC_TO_EDX(alloc_to_edx,%edx)
+DEFINE_ALLOC_TO_EDX(alloc_8_to_edx,$8)
+DEFINE_ALLOC_TO_EDX(alloc_16_to_edx,$16)
+
+DEFINE_ALLOC_TO_REG(alloc_to_ebx,%ebx,%ebx)
+DEFINE_ALLOC_TO_REG(alloc_8_to_ebx,%ebx,$8)
+DEFINE_ALLOC_TO_REG(alloc_16_to_ebx,%ebx,$16)
+
+DEFINE_ALLOC_TO_REG(alloc_to_esi,%esi,%esi)
+DEFINE_ALLOC_TO_REG(alloc_8_to_esi,%esi,$8)
+DEFINE_ALLOC_TO_REG(alloc_16_to_esi,%esi,$16)
+
+DEFINE_ALLOC_TO_REG(alloc_to_edi,%edi,%edi)
+DEFINE_ALLOC_TO_REG(alloc_8_to_edi,%edi,$8)
+DEFINE_ALLOC_TO_REG(alloc_16_to_edi,%edi,$16)
+
+/* Called from lisp when an inline allocation overflows.
+ * Every register except the result needs to be preserved.
* We depend on C to preserve ebx, esi, edi, and ebp.
* But where necessary must save eax, ecx, edx. */
+#ifdef LISP_FEATURE_SB_THREAD
+#define START_REGION %fs:THREAD_ALLOC_REGION_OFFSET
+#else
+#define START_REGION GNAME(boxed_region)
+#endif
+
+#define ALLOC_OVERFLOW(size) \
+ /* Calculate the size for the allocation. */ \
+ subl START_REGION,size; \
+ ALLOC(size)
+
/* This routine handles an overflow with eax=crfp+size. So the
- * size=eax-crfp. */
- .align align_4byte
- .globl GNAME(alloc_overflow_eax)
- .type GNAME(alloc_overflow_eax),@function
+ size=eax-crfp. */
+ .align align_4byte
+ .globl GNAME(alloc_overflow_eax)
+ TYPE(GNAME(alloc_overflow_eax))
GNAME(alloc_overflow_eax):
- pushl %ecx # Save ecx
- pushl %edx # Save edx
- /* Calculate the size for the allocation. */
- subl GNAME(current_region_free_pointer),%eax
- pushl %eax # Push the size
- call GNAME(alloc)
- addl $4,%esp # pop the size arg.
- popl %edx # Restore edx.
- popl %ecx # Restore ecx.
- addl $6,(%esp) # Adjust the return address to skip the next inst.
- ret
- .size GNAME(alloc_overflow_eax),.-GNAME(alloc_overflow_eax)
-
-/* This routine handles an overflow with ecx=crfp+size. So the
- * size=ecx-crfp. */
- .align align_4byte
- .globl GNAME(alloc_overflow_ecx)
- .type GNAME(alloc_overflow_ecx),@function
+ pushl %ecx # Save ecx
+ pushl %edx # Save edx
+ ALLOC_OVERFLOW(%eax)
+ popl %edx # Restore edx.
+ popl %ecx # Restore ecx.
+ ret
+ SIZE(GNAME(alloc_overflow_eax))
+
+ .align align_4byte
+ .globl GNAME(alloc_overflow_ecx)
+ TYPE(GNAME(alloc_overflow_ecx))
GNAME(alloc_overflow_ecx):
- pushl %eax # Save eax
- pushl %edx # Save edx
- /* Calculate the size for the allocation. */
- subl GNAME(current_region_free_pointer),%ecx
- pushl %ecx # Push the size
- call GNAME(alloc)
- addl $4,%esp # pop the size arg.
- movl %eax,%ecx # setup the destination.
- popl %edx # Restore edx.
- popl %eax # Restore eax.
- addl $6,(%esp) # Adjust the return address to skip the next inst.
- ret
- .size GNAME(alloc_overflow_ecx),.-GNAME(alloc_overflow_ecx)
-
-/* This routine handles an overflow with edx=crfp+size. So the
- * size=edx-crfp. */
- .align align_4byte
- .globl GNAME(alloc_overflow_edx)
- .type GNAME(alloc_overflow_edx),@function
+ pushl %eax # Save eax
+ pushl %edx # Save edx
+ ALLOC_OVERFLOW(%ecx)
+ movl %eax,%ecx # setup the destination.
+ popl %edx # Restore edx.
+ popl %eax # Restore eax.
+ ret
+ SIZE(GNAME(alloc_overflow_ecx))
+
+ .align align_4byte
+ .globl GNAME(alloc_overflow_edx)
+ TYPE(GNAME(alloc_overflow_edx))
GNAME(alloc_overflow_edx):
- pushl %eax # Save eax
- pushl %ecx # Save ecx
- /* Calculate the size for the allocation. */
- subl GNAME(current_region_free_pointer),%edx
- pushl %edx # Push the size
- call GNAME(alloc)
- addl $4,%esp # pop the size arg.
- movl %eax,%edx # setup the destination.
- popl %ecx # Restore ecx.
- popl %eax # Restore eax.
- addl $6,(%esp) # Adjust the return address to skip the next inst.
- ret
- .size GNAME(alloc_overflow_edx),.-GNAME(alloc_overflow_edx)
+ pushl %eax # Save eax
+ pushl %ecx # Save ecx
+ ALLOC_OVERFLOW(%edx)
+ movl %eax,%edx # setup the destination.
+ popl %ecx # Restore ecx.
+ popl %eax # Restore eax.
+ ret
+ SIZE(GNAME(alloc_overflow_edx))
/* This routine handles an overflow with ebx=crfp+size. So the
- * size=ebx-crfp. */
- .align align_4byte
- .globl GNAME(alloc_overflow_ebx)
- .type GNAME(alloc_overflow_ebx),@function
+ size=ebx-crfp. */
+ .align align_4byte
+ .globl GNAME(alloc_overflow_ebx)
+ TYPE(GNAME(alloc_overflow_ebx))
GNAME(alloc_overflow_ebx):
- pushl %eax # Save eax
- pushl %ecx # Save ecx
- pushl %edx # Save edx
- /* Calculate the size for the allocation. */
- subl GNAME(current_region_free_pointer),%ebx
- pushl %ebx # Push the size
- call GNAME(alloc)
- addl $4,%esp # pop the size arg.
- movl %eax,%ebx # setup the destination.
- popl %edx # Restore edx.
- popl %ecx # Restore ecx.
- popl %eax # Restore eax.
- addl $6,(%esp) # Adjust the return address to skip the next inst.
- ret
- .size GNAME(alloc_overflow_ebx),.-GNAME(alloc_overflow_ebx)
+ pushl %eax # Save eax
+ pushl %ecx # Save ecx
+ pushl %edx # Save edx
+ ALLOC_OVERFLOW(%ebx)
+ movl %eax,%ebx # setup the destination.
+ popl %edx # Restore edx.
+ popl %ecx # Restore ecx.
+ popl %eax # Restore eax.
+ ret
+ SIZE(GNAME(alloc_overflow_ebx))
/* This routine handles an overflow with esi=crfp+size. So the
- * size=esi-crfp. */
- .align align_4byte
- .globl GNAME(alloc_overflow_esi)
- .type GNAME(alloc_overflow_esi),@function
+ size=esi-crfp. */
+ .align align_4byte
+ .globl GNAME(alloc_overflow_esi)
+ TYPE(GNAME(alloc_overflow_esi))
GNAME(alloc_overflow_esi):
- pushl %eax # Save eax
- pushl %ecx # Save ecx
- pushl %edx # Save edx
- /* Calculate the size for the allocation. */
- subl GNAME(current_region_free_pointer),%esi
- pushl %esi # Push the size
- call GNAME(alloc)
- addl $4,%esp # pop the size arg.
- movl %eax,%esi # setup the destination.
- popl %edx # Restore edx.
- popl %ecx # Restore ecx.
- popl %eax # Restore eax.
- addl $6,(%esp) # Adjust the return address to skip the next inst.
- ret
- .size GNAME(alloc_overflow_esi),.-GNAME(alloc_overflow_esi)
-
-/* This routine handles an overflow with edi=crfp+size. So the
- * size=edi-crfp. */
- .align align_4byte
- .globl GNAME(alloc_overflow_edi)
- .type GNAME(alloc_overflow_edi),@function
+ pushl %eax # Save eax
+ pushl %ecx # Save ecx
+ pushl %edx # Save edx
+ ALLOC_OVERFLOW(%esi)
+ movl %eax,%esi # setup the destination.
+ popl %edx # Restore edx.
+ popl %ecx # Restore ecx.
+ popl %eax # Restore eax.
+ ret
+ SIZE(GNAME(alloc_overflow_esi))
+
+ .align align_4byte
+ .globl GNAME(alloc_overflow_edi)
+ TYPE(GNAME(alloc_overflow_edi))
GNAME(alloc_overflow_edi):
- pushl %eax # Save eax
- pushl %ecx # Save ecx
- pushl %edx # Save edx
- /* Calculate the size for the allocation. */
- subl GNAME(current_region_free_pointer),%edi
- pushl %edi # Push the size
- call GNAME(alloc)
- addl $4,%esp # pop the size arg.
- movl %eax,%edi # setup the destination.
- popl %edx # Restore edx.
- popl %ecx # Restore ecx.
- popl %eax # Restore eax.
- addl $6,(%esp) # Adjust the return address to skip the next inst.
+ pushl %eax # Save eax
+ pushl %ecx # Save ecx
+ pushl %edx # Save edx
+ ALLOC_OVERFLOW(%edi)
+ movl %eax,%edi # setup the destination.
+ popl %edx # Restore edx.
+ popl %ecx # Restore ecx.
+ popl %eax # Restore eax.
+ ret
+ SIZE(GNAME(alloc_overflow_edi))
+
+
+#ifdef LISP_FEATURE_WIN32
+ /* The guts of the exception-handling system doesn't use
+ * frame pointers, which manages to throw off backtraces
+ * rather badly. So here we grab the (known-good) EBP
+ * and EIP from the exception context and use it to fake
+ * up a stack frame which will skip over the system SEH
+ * code. */
+ .align align_4byte
+ .globl GNAME(exception_handler_wrapper)
+ TYPE(GNAME(exception_handler_wrapper))
+GNAME(exception_handler_wrapper):
+ /* Context layout is: */
+ /* 7 dwords before FSA. (0x1c) */
+ /* 8 dwords and 0x50 bytes in the FSA. (0x70/0x8c) */
+ /* 4 dwords segregs. (0x10/0x9c) */
+ /* 6 dwords non-stack GPRs. (0x18/0xb4) */
+ /* EBP (at 0xb4) */
+ /* EIP (at 0xb8) */
+#define CONTEXT_EBP_OFFSET 0xb4
+#define CONTEXT_EIP_OFFSET 0xb8
+ /* some other stuff we don't care about. */
+ pushl %ebp
+ movl 0x10(%esp), %ebp /* context */
+ pushl CONTEXT_EIP_OFFSET(%ebp)
+ pushl CONTEXT_EBP_OFFSET(%ebp)
+ movl %esp, %ebp
+ pushl 0x1c(%esp)
+ pushl 0x1c(%esp)
+ pushl 0x1c(%esp)
+ pushl 0x1c(%esp)
+ call GNAME(handle_exception)
+ lea 8(%ebp), %esp
+ popl %ebp
ret
- .size GNAME(alloc_overflow_edi),.-GNAME(alloc_overflow_edi)
+ SIZE(GNAME(exception_handler_wrapper))
+#endif
+#ifdef LISP_FEATURE_DARWIN
+ .align align_4byte
+ .globl GNAME(call_into_lisp_tramp)
+ TYPE(GNAME(call_into_lisp_tramp))
+GNAME(call_into_lisp_tramp):
+ /* 1. build the stack frame from the block that's pointed to by ECX
+ 2. free the block
+ 3. set ECX to 0
+ 4. call the function via call_into_lisp
+ */
+ pushl 0(%ecx) /* return address */
+
+ pushl %ebp
+ movl %esp, %ebp
+
+ pushl 32(%ecx) /* eflags */
+ pushl 28(%ecx) /* EAX */
+ pushl 20(%ecx) /* ECX */
+ pushl 16(%ecx) /* EDX */
+ pushl 24(%ecx) /* EBX */
+ pushl $0 /* popal is going to ignore esp */
+ pushl %ebp /* is this right?? */
+ pushl 12(%ecx) /* ESI */
+ pushl 8(%ecx) /* EDI */
+ pushl $0 /* args for call_into_lisp */
+ pushl $0
+ pushl 4(%ecx) /* function to call */
+
+ /* free our save block */
+ pushl %ecx /* reserve sufficient space on stack for args */
+ pushl %ecx
+ andl $0xfffffff0, %esp /* align stack */
+ movl $0x40, 4(%esp)
+ movl %ecx, (%esp)
+ call GNAME(os_invalidate)
+
+ /* call call_into_lisp */
+ leal -48(%ebp), %esp
+ call GNAME(call_into_lisp)
+
+ /* Clean up our mess */
+ leal -36(%ebp), %esp
+ popal
+ popfl
+ leave
+ ret
+
+ SIZE(call_into_lisp_tramp)
#endif
+
+ .align align_4byte,0x90
+ .globl GNAME(post_signal_tramp)
+ TYPE(GNAME(post_signal_tramp))
+GNAME(post_signal_tramp):
+ /* this is notionally the second half of a function whose first half
+ * doesn't exist. This is where call_into_lisp returns when called
+ * using return_to_lisp_function */
+ addl $12,%esp /* clear call_into_lisp args from stack */
+ popal /* restore registers */
+ popfl
+#ifdef LISP_FEATURE_DARWIN
+ /* skip two padding words */
+ addl $8,%esp
+#endif
+ leave
+ ret
+ SIZE(GNAME(post_signal_tramp))
- .end
+
+ /* fast_bzero implementations and code to detect which implementation
+ * to use.
+ */
+\f
+ .globl GNAME(fast_bzero_pointer)
+ .data
+ .align align_4byte
+GNAME(fast_bzero_pointer):
+ /* Variable containing a pointer to the bzero function to use.
+ * Initially points to a basic function. Change this variable
+ * to fast_bzero_detect if OS supports SSE. */
+ .long GNAME(fast_bzero_base)
+\f
+ .text
+ .align align_8byte,0x90
+ .globl GNAME(fast_bzero)
+ TYPE(GNAME(fast_bzero))
+GNAME(fast_bzero):
+ /* Indirect function call */
+ jmp *GNAME(fast_bzero_pointer)
+ SIZE(GNAME(fast_bzero))
+
+\f
+ .text
+ .align align_8byte,0x90
+ .globl GNAME(fast_bzero_detect)
+ TYPE(GNAME(fast_bzero_detect))
+GNAME(fast_bzero_detect):
+ /* Decide whether to use SSE, MMX or REP version */
+ push %eax /* CPUID uses EAX-EDX */
+ push %ebx
+ push %ecx
+ push %edx
+ mov $1, %eax
+ cpuid
+ test $0x04000000, %edx /* SSE2 needed for MOVNTDQ */
+ jnz Lsse2
+ /* Originally there was another case here for using the
+ * MOVNTQ instruction for processors that supported MMX but
+ * not SSE2. This turned out to be a loss especially on
+ * Athlons (where this instruction is apparently microcoded
+ * somewhat slowly). So for simplicity revert to REP STOSL
+ * for all non-SSE2 processors.
+ */
+Lbase:
+ movl $(GNAME(fast_bzero_base)), GNAME(fast_bzero_pointer)
+ jmp Lrestore
+Lsse2:
+ movl $(GNAME(fast_bzero_sse)), GNAME(fast_bzero_pointer)
+ jmp Lrestore
+
+Lrestore:
+ pop %edx
+ pop %ecx
+ pop %ebx
+ pop %eax
+ jmp *GNAME(fast_bzero_pointer)
+
+ SIZE(GNAME(fast_bzero_detect))
+
+\f
+ .text
+ .align align_8byte,0x90
+ .globl GNAME(fast_bzero_sse)
+ TYPE(GNAME(fast_bzero_sse))
+
+GNAME(fast_bzero_sse):
+ /* A fast routine for zero-filling blocks of memory that are
+ * guaranteed to start and end at a 4096-byte aligned address.
+ */
+ push %esi /* Save temporary registers */
+ push %edi
+ mov 16(%esp), %esi /* Parameter: amount of bytes to fill */
+ mov 12(%esp), %edi /* Parameter: start address */
+ shr $6, %esi /* Amount of 64-byte blocks to copy */
+ jz Lend_sse /* If none, stop */
+ movups %xmm7, -16(%esp) /* Save XMM register */
+ xorps %xmm7, %xmm7 /* Zero the XMM register */
+ jmp Lloop_sse
+ .align align_16byte
+Lloop_sse:
+
+ /* Copy the 16 zeroes from xmm7 to memory, 4 times. MOVNTDQ is the
+ * non-caching double-quadword moving variant, i.e. the memory areas
+ * we're touching are not fetched into the L1 cache, since we're just
+ * going to overwrite the memory soon anyway.
+ */
+ movntdq %xmm7, 0(%edi)
+ movntdq %xmm7, 16(%edi)
+ movntdq %xmm7, 32(%edi)
+ movntdq %xmm7, 48(%edi)
+
+ add $64, %edi /* Advance pointer */
+ dec %esi /* Decrement 64-byte block count */
+ jnz Lloop_sse
+ movups -16(%esp), %xmm7 /* Restore the XMM register */
+ sfence /* Ensure that weakly ordered writes are flushed. */
+Lend_sse:
+ mov 12(%esp), %esi /* Parameter: start address */
+ prefetcht0 0(%esi) /* Prefetch the start of the block into cache,
+ * since it's likely to be used immediately. */
+ pop %edi /* Restore temp registers */
+ pop %esi
+ ret
+ SIZE(GNAME(fast_bzero_sse))
+
+\f
+ .text
+ .align align_8byte,0x90
+ .globl GNAME(fast_bzero_base)
+ TYPE(GNAME(fast_bzero_base))
+
+GNAME(fast_bzero_base):
+ /* A fast routine for zero-filling blocks of memory that are
+ * guaranteed to start and end at a 4096-byte aligned address.
+ */
+ push %eax /* Save temporary registers */
+ push %ecx
+ push %edi
+ mov 20(%esp), %ecx /* Parameter: amount of bytes to fill */
+ mov 16(%esp), %edi /* Parameter: start address */
+ xor %eax, %eax /* Zero EAX */
+ shr $2, %ecx /* Amount of 4-byte blocks to copy */
+ jz Lend_base
+
+ rep
+ stosl /* Store EAX to *EDI, ECX times, incrementing
+ * EDI by 4 after each store */
+
+Lend_base:
+ pop %edi /* Restore temp registers */
+ pop %ecx
+ pop %eax
+ ret
+ SIZE(GNAME(fast_bzero_base))
+
+\f
+ END()
projects / sbcl.git / blobdiff