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Diffstat (limited to 'Src/ns-eel2/glue_x86.h')
-rw-r--r--Src/ns-eel2/glue_x86.h524
1 files changed, 524 insertions, 0 deletions
diff --git a/Src/ns-eel2/glue_x86.h b/Src/ns-eel2/glue_x86.h
new file mode 100644
index 00000000..dd1a101b
--- /dev/null
+++ b/Src/ns-eel2/glue_x86.h
@@ -0,0 +1,524 @@
+#ifndef _NSEEL_GLUE_X86_H_
+#define _NSEEL_GLUE_X86_H_
+
+#include <intrin.h>
+
+#define GLUE_MAX_FPSTACK_SIZE 8
+
+// endOfInstruction is end of jump with relative offset, offset is offset from end of instruction to jump to
+#define GLUE_JMP_SET_OFFSET(endOfInstruction,offset) (((int *)(endOfInstruction))[-1] = (offset))
+
+static const unsigned char GLUE_JMP_NC[] = { 0xE9, 0,0,0,0, }; // jmp<offset>
+static const unsigned char GLUE_JMP_IF_P1_Z[] = {0x85, 0xC0, 0x0F, 0x84, 0,0,0,0 }; // test eax, eax, jz
+static const unsigned char GLUE_JMP_IF_P1_NZ[] = {0x85, 0xC0, 0x0F, 0x85, 0,0,0,0 }; // test eax, eax, jnz
+
+#define GLUE_FUNC_ENTER_SIZE 0
+#define GLUE_FUNC_LEAVE_SIZE 0
+const static unsigned int GLUE_FUNC_ENTER[1];
+const static unsigned int GLUE_FUNC_LEAVE[1];
+
+ // x86
+ // stack is 16 byte aligned
+ // when pushing values to stack, alignment pushed first, then value (value is at the lower address)
+ // when pushing pointers to stack, alignment pushed first, then pointer (pointer is at the lower address)
+
+ static const unsigned char GLUE_PUSH_P1PTR_AS_VALUE[] =
+ {
+ 0x83, 0xEC, 8, /* sub esp, 8 */
+ 0xff, 0x70, 0x4, /* push dword [eax+4] */
+ 0xff, 0x30, /* push dword [eax] */
+ };
+
+ static int GLUE_POP_VALUE_TO_ADDR(unsigned char *buf, void *destptr)
+ {
+ if (buf)
+ {
+ *buf++ = 0xB8; *(void **) buf = destptr; buf+=4; // mov eax, directvalue
+
+ *buf++ = 0x8f; *buf++ = 0x00; // pop dword [eax]
+ *buf++ = 0x8f; *buf++ = 0x40; *buf++ = 4; // pop dword [eax+4]
+
+ *buf++ = 0x59; // pop ecx (alignment)
+ *buf++ = 0x59; // pop ecx (alignment)
+ }
+
+ return 12;
+ }
+
+ static int GLUE_COPY_VALUE_AT_P1_TO_PTR(unsigned char *buf, void *destptr)
+ {
+ if (buf)
+ {
+ *buf++ = 0x8B; *buf++ = 0x38; // mov edi, [eax]
+ *buf++ = 0x8B; *buf++ = 0x48; *buf++ = 0x04; // mov ecx, [eax+4]
+
+
+ *buf++ = 0xB8; *(void **) buf = destptr; buf+=4; // mov eax, directvalue
+ *buf++ = 0x89; *buf++ = 0x38; // mov [eax], edi
+ *buf++ = 0x89; *buf++ = 0x48; *buf++ = 0x04; // mov [eax+4], ecx
+ }
+
+ return 2 + 3 + 5 + 2 + 3;
+ }
+
+ static int GLUE_POP_FPSTACK_TO_PTR(unsigned char *buf, void *destptr)
+ {
+ if (buf)
+ {
+ *buf++ = 0xB8; *(void **) buf = destptr; buf+=4; // mov eax, directvalue
+ *buf++ = 0xDD; *buf++ = 0x18; // fstp qword [eax]
+ }
+ return 1+4+2;
+ }
+
+
+ #define GLUE_MOV_PX_DIRECTVALUE_SIZE 5
+ #define GLUE_MOV_PX_DIRECTVALUE_TOSTACK_SIZE 6 // length when wv == -1
+
+ static void GLUE_MOV_PX_DIRECTVALUE_GEN(void *b, INT_PTR v, int wv)
+ {
+ if (wv==-1)
+ {
+ const static unsigned char t[2] = {0xDD, 0x05};
+ memcpy(b,t,2);
+ b= ((unsigned char *)b)+2;
+ }
+ else
+ {
+ const static unsigned char tab[3] = {
+ 0xB8 /* mov eax, dv*/,
+ 0xBF /* mov edi, dv */ ,
+ 0xB9 /* mov ecx, dv */
+ };
+ *((unsigned char *)b) = tab[wv]; // mov eax, dv
+ b= ((unsigned char *)b)+1;
+ }
+ *(INT_PTR *)b = v;
+ }
+ const static unsigned char GLUE_PUSH_P1[4]={0x83, 0xEC, 12, 0x50}; // sub esp, 12, push eax
+
+ #define GLUE_STORE_P1_TO_STACK_AT_OFFS_SIZE(x) 7
+ static void GLUE_STORE_P1_TO_STACK_AT_OFFS(void *b, int offs)
+ {
+ ((unsigned char *)b)[0] = 0x89; // mov [esp+offs], eax
+ ((unsigned char *)b)[1] = 0x84;
+ ((unsigned char *)b)[2] = 0x24;
+ *(int *)((unsigned char *)b+3) = offs;
+ }
+
+ #define GLUE_MOVE_PX_STACKPTR_SIZE 2
+ static void GLUE_MOVE_PX_STACKPTR_GEN(void *b, int wv)
+ {
+ static const unsigned char tab[3][GLUE_MOVE_PX_STACKPTR_SIZE]=
+ {
+ { 0x89, 0xe0 }, // mov eax, esp
+ { 0x89, 0xe7 }, // mov edi, esp
+ { 0x89, 0xe1 }, // mov ecx, esp
+ };
+ memcpy(b,tab[wv],GLUE_MOVE_PX_STACKPTR_SIZE);
+ }
+
+ #define GLUE_MOVE_STACK_SIZE 6
+ static void GLUE_MOVE_STACK(void *b, int amt)
+ {
+ ((unsigned char *)b)[0] = 0x81;
+ if (amt <0)
+ {
+ ((unsigned char *)b)[1] = 0xEC;
+ *(int *)((char*)b+2) = -amt; // sub esp, -amt
+ }
+ else
+ {
+ ((unsigned char *)b)[1] = 0xc4;
+ *(int *)((char*)b+2) = amt; // add esp, amt
+ }
+ }
+
+
+ #define GLUE_POP_PX_SIZE 4
+ static void GLUE_POP_PX(void *b, int wv)
+ {
+ static const unsigned char tab[3][GLUE_POP_PX_SIZE]=
+ {
+ {0x58,/*pop eax*/ 0x83, 0xC4, 12 /* add esp, 12*/},
+ {0x5F,/*pop edi*/ 0x83, 0xC4, 12},
+ {0x59,/*pop ecx*/ 0x83, 0xC4, 12},
+ };
+ memcpy(b,tab[wv],GLUE_POP_PX_SIZE);
+ }
+
+ #define GLUE_SET_PX_FROM_P1_SIZE 2
+ static void GLUE_SET_PX_FROM_P1(void *b, int wv)
+ {
+ static const unsigned char tab[3][GLUE_SET_PX_FROM_P1_SIZE]={
+ {0x90,0x90}, // should never be used! (nopnop)
+ {0x89,0xC7}, // mov edi, eax
+ {0x89,0xC1}, // mov ecx, eax
+ };
+ memcpy(b,tab[wv],GLUE_SET_PX_FROM_P1_SIZE);
+ }
+
+ #define GLUE_POP_FPSTACK_SIZE 2
+ static const unsigned char GLUE_POP_FPSTACK[2] = { 0xDD, 0xD8 }; // fstp st0
+
+ static const unsigned char GLUE_POP_FPSTACK_TOSTACK[] = {
+ 0x83, 0xEC, 16, // sub esp, 16
+ 0xDD, 0x1C, 0x24 // fstp qword (%esp)
+ };
+
+ static const unsigned char GLUE_POP_STACK_TO_FPSTACK[] = {
+ 0xDD, 0x04, 0x24, // fld qword (%esp)
+ 0x83, 0xC4, 16 // add esp, 16
+ };
+
+ static const unsigned char GLUE_POP_FPSTACK_TO_WTP[] = {
+ 0xDD, 0x1E, /* fstp qword [esi] */
+ 0x83, 0xC6, 8, /* add esi, 8 */
+ };
+
+ #define GLUE_SET_PX_FROM_WTP_SIZE 2
+ static void GLUE_SET_PX_FROM_WTP(void *b, int wv)
+ {
+ static const unsigned char tab[3][GLUE_SET_PX_FROM_WTP_SIZE]={
+ {0x89,0xF0}, // mov eax, esi
+ {0x89,0xF7}, // mov edi, esi
+ {0x89,0xF1}, // mov ecx, esi
+ };
+ memcpy(b,tab[wv],GLUE_SET_PX_FROM_WTP_SIZE);
+ }
+
+ #define GLUE_PUSH_VAL_AT_PX_TO_FPSTACK_SIZE 2
+ static void GLUE_PUSH_VAL_AT_PX_TO_FPSTACK(void *b, int wv)
+ {
+ static const unsigned char tab[3][GLUE_PUSH_VAL_AT_PX_TO_FPSTACK_SIZE]={
+ {0xDD,0x00}, // fld qword [eax]
+ {0xDD,0x07}, // fld qword [edi]
+ {0xDD,0x01}, // fld qword [ecx]
+ };
+ memcpy(b,tab[wv],GLUE_PUSH_VAL_AT_PX_TO_FPSTACK_SIZE);
+ }
+
+#define GLUE_POP_FPSTACK_TO_WTP_TO_PX_SIZE (GLUE_SET_PX_FROM_WTP_SIZE + sizeof(GLUE_POP_FPSTACK_TO_WTP))
+static void GLUE_POP_FPSTACK_TO_WTP_TO_PX(unsigned char *buf, int wv)
+{
+ GLUE_SET_PX_FROM_WTP(buf,wv);
+ memcpy(buf + GLUE_SET_PX_FROM_WTP_SIZE,GLUE_POP_FPSTACK_TO_WTP,sizeof(GLUE_POP_FPSTACK_TO_WTP));
+};
+
+
+const static unsigned char GLUE_RET=0xC3;
+
+static int GLUE_RESET_WTP(unsigned char *out, void *ptr)
+{
+ if (out)
+ {
+ *out++ = 0xBE; // mov esi, constant
+ memcpy(out,&ptr,sizeof(void *));
+ out+=sizeof(void *);
+ }
+ return 1+sizeof(void *);
+}
+
+
+#ifdef _MSC_VER
+#pragma warning(push)
+#pragma warning(disable: 4731)
+#endif
+
+#define GLUE_TABPTR_IGNORED
+#define GLUE_CALL_CODE(bp, cp, rt) do { \
+ if (h->compile_flags&NSEEL_CODE_COMPILE_FLAG_NOFPSTATE) eel_callcode32_fast(cp, rt); \
+ else eel_callcode32(cp, rt);\
+ } while(0)
+
+static void eel_callcode32(INT_PTR cp, INT_PTR ramptr)
+{
+ #ifndef NSEEL_EEL1_COMPAT_MODE
+ short oldsw, newsw;
+ #endif
+ #ifdef _MSC_VER
+
+ __asm
+ {
+#ifndef NSEEL_EEL1_COMPAT_MODE
+ fnstcw [oldsw]
+ mov ax, [oldsw]
+ or ax, 0xE3F // 53 or 64 bit precision (depending on whether 0x100 is set), trunc, and masking all exceptions
+ mov [newsw], ax
+ fldcw [newsw]
+#endif
+
+ mov eax, cp
+ mov ebx, ramptr
+
+ pushad
+ mov ebp, esp
+ and esp, -16
+
+ // on win32, which _MSC_VER implies, we keep things aligned to 16 bytes, and if we call a win32 function,
+ // the stack is 16 byte aligned before the call, meaning that if calling a function with no frame pointer,
+ // the stack would be aligned to a 16 byte boundary +4, which isn't good for performance. Having said that,
+ // normally we compile with frame pointers (which brings that to 16 byte + 8, which is fine), or ICC, which
+ // for nontrivial functions will align the stack itself (for very short functions, it appears to weigh the
+ // cost of aligning the stack vs that of the slower misaligned double accesses).
+
+ // it may be worthwhile (at some point) to put some logic in the code that calls out to functions
+ // (generic1parm etc) to detect which alignment would be most optimal.
+ sub esp, 12
+ call eax
+ mov esp, ebp
+ popad
+#ifndef NSEEL_EEL1_COMPAT_MODE
+ fldcw [oldsw]
+#endif
+ };
+
+ #else // gcc x86
+ __asm__(
+#ifndef NSEEL_EEL1_COMPAT_MODE
+ "fnstcw %2\n"
+ "movw %2, %%ax\n"
+ "orw $0xE3F, %%ax\n" // 53 or 64 bit precision (depending on whether 0x100 is set), trunc, and masking all exceptions
+ "movw %%ax, %3\n"
+ "fldcw %3\n"
+#endif
+ "pushl %%ebx\n"
+ "movl %%ecx, %%ebx\n"
+ "pushl %%ebp\n"
+ "movl %%esp, %%ebp\n"
+ "andl $-16, %%esp\n" // align stack to 16 bytes
+ "subl $12, %%esp\n" // call will push 4 bytes on stack, align for that
+ "call *%%edx\n"
+ "leave\n"
+ "popl %%ebx\n"
+#ifndef NSEEL_EEL1_COMPAT_MODE
+ "fldcw %2\n"
+#endif
+ ::
+ "d" (cp), "c" (ramptr)
+#ifndef NSEEL_EEL1_COMPAT_MODE
+ , "m" (oldsw), "m" (newsw)
+#endif
+ : "%eax","%esi","%edi");
+ #endif //gcc x86
+}
+
+void eel_enterfp(int s[2])
+{
+ #ifdef _MSC_VER
+ __asm
+ {
+ mov ecx, s
+ fnstcw [ecx]
+ mov ax, [ecx]
+ or ax, 0xE3F // 53 or 64 bit precision (depending on whether 0x100 is set), trunc, and masking all exceptions
+ mov [ecx+4], ax
+ fldcw [ecx+4]
+ };
+ #else
+ __asm__(
+ "fnstcw (%%ecx)\n"
+ "movw (%%ecx), %%ax\n"
+ "orw $0xE3F, %%ax\n" // 53 or 64 bit precision (depending on whether 0x100 is set), trunc, and masking all exceptions
+ "movw %%ax, 4(%%ecx)\n"
+ "fldcw 4(%%ecx)\n"
+ :: "c" (s) : "%eax");
+ #endif
+}
+void eel_leavefp(int s[2])
+{
+ #ifdef _MSC_VER
+ __asm
+ {
+ mov ecx, s
+ fldcw [ecx]
+ };
+ #else
+ __asm__(
+ "fldcw (%%ecx)\n"
+ :: "c" (s) : "%eax");
+ #endif
+}
+
+static void eel_callcode32_fast(INT_PTR cp, INT_PTR ramptr)
+{
+ #ifdef _MSC_VER
+
+ __asm
+ {
+ mov eax, cp
+ mov ebx, ramptr
+
+ pushad
+ mov ebp, esp
+ and esp, -16
+
+ // on win32, which _MSC_VER implies, we keep things aligned to 16 bytes, and if we call a win32 function,
+ // the stack is 16 byte aligned before the call, meaning that if calling a function with no frame pointer,
+ // the stack would be aligned to a 16 byte boundary +4, which isn't good for performance. Having said that,
+ // normally we compile with frame pointers (which brings that to 16 byte + 8, which is fine), or ICC, which
+ // for nontrivial functions will align the stack itself (for very short functions, it appears to weigh the
+ // cost of aligning the stack vs that of the slower misaligned double accesses).
+
+ // it may be worthwhile (at some point) to put some logic in the code that calls out to functions
+ // (generic1parm etc) to detect which alignment would be most optimal.
+ sub esp, 12
+ call eax
+ mov esp, ebp
+ popad
+ };
+
+ #else // gcc x86
+ __asm__(
+ "pushl %%ebx\n"
+ "movl %%ecx, %%ebx\n"
+ "pushl %%ebp\n"
+ "movl %%esp, %%ebp\n"
+ "andl $-16, %%esp\n" // align stack to 16 bytes
+ "subl $12, %%esp\n" // call will push 4 bytes on stack, align for that
+ "call *%%edx\n"
+ "leave\n"
+ "popl %%ebx\n"
+ ::
+ "d" (cp), "c" (ramptr)
+ : "%eax","%esi","%edi");
+ #endif //gcc x86
+}
+
+#ifdef _MSC_VER
+#pragma warning(pop)
+#endif
+
+
+static unsigned char *EEL_GLUE_set_immediate(void *_p, INT_PTR newv)
+{
+ char *p=(char*)_p;
+ INT_PTR scan = 0xFEFEFEFE;
+ while (*(INT_PTR *)p != scan) p++;
+ *(INT_PTR *)p = newv;
+ return (unsigned char *) (((INT_PTR*)p)+1);
+}
+
+#define INT_TO_LECHARS(x) ((x)&0xff),(((x)>>8)&0xff), (((x)>>16)&0xff), (((x)>>24)&0xff)
+
+
+#define GLUE_INLINE_LOOPS
+
+static const unsigned char GLUE_LOOP_LOADCNT[]={
+ 0xDB, 0x1E, //fistp dword [esi]
+ 0x8B, 0x0E, // mov ecx, [esi]
+ 0x81, 0xf9, 1,0,0,0, // cmp ecx, 1
+ 0x0F, 0x8C, 0,0,0,0, // JL <skipptr>
+};
+
+#if NSEEL_LOOPFUNC_SUPPORT_MAXLEN > 0
+#define GLUE_LOOP_CLAMPCNT_SIZE sizeof(GLUE_LOOP_CLAMPCNT)
+static const unsigned char GLUE_LOOP_CLAMPCNT[]={
+ 0x81, 0xf9, INT_TO_LECHARS(NSEEL_LOOPFUNC_SUPPORT_MAXLEN), // cmp ecx, NSEEL_LOOPFUNC_SUPPORT_MAXLEN
+ 0x0F, 0x8C, 5,0,0,0, // JL over-the-mov
+ 0xB9, INT_TO_LECHARS(NSEEL_LOOPFUNC_SUPPORT_MAXLEN), // mov ecx, NSEEL_LOOPFUNC_SUPPORT_MAXLEN
+};
+#else
+
+#define GLUE_LOOP_CLAMPCNT_SIZE 0
+#define GLUE_LOOP_CLAMPCNT ""
+
+#endif
+
+#define GLUE_LOOP_BEGIN_SIZE sizeof(GLUE_LOOP_BEGIN)
+static const unsigned char GLUE_LOOP_BEGIN[]={
+ 0x56, //push esi
+ 0x51, // push ecx
+ 0x81, 0xEC, 0x08, 0,0,0, // sub esp, 8
+};
+static const unsigned char GLUE_LOOP_END[]={
+ 0x81, 0xC4, 0x08, 0,0,0, // add esp, 8
+ 0x59, //pop ecx
+ 0x5E, // pop esi
+ 0x49, // dec ecx
+ 0x0f, 0x85, 0,0,0,0, // jnz ...
+};
+
+
+#if NSEEL_LOOPFUNC_SUPPORT_MAXLEN > 0
+#define GLUE_WHILE_SETUP_SIZE sizeof(GLUE_WHILE_SETUP)
+static const unsigned char GLUE_WHILE_SETUP[]={
+ 0xB9, INT_TO_LECHARS(NSEEL_LOOPFUNC_SUPPORT_MAXLEN), // mov ecx, NSEEL_LOOPFUNC_SUPPORT_MAXLEN
+};
+static const unsigned char GLUE_WHILE_BEGIN[]={
+ 0x56, //push esi
+ 0x51, // push ecx
+ 0x81, 0xEC, 0x08, 0,0,0, // sub esp, 8
+};
+static const unsigned char GLUE_WHILE_END[]={
+ 0x81, 0xC4, 0x08, 0,0,0, // add esp, 8
+ 0x59, //pop ecx
+ 0x5E, // pop esi
+
+
+ 0x49, // dec ecx
+ 0x0f, 0x84, 0,0,0,0, // jz endpt
+};
+
+
+#else
+
+#define GLUE_WHILE_SETUP_SIZE 0
+#define GLUE_WHILE_SETUP ""
+#define GLUE_WHILE_END_NOJUMP
+static const unsigned char GLUE_WHILE_BEGIN[]={
+ 0x56, //push esi
+ 0x81, 0xEC, 12, 0,0,0, // sub esp, 12
+};
+static const unsigned char GLUE_WHILE_END[]={
+ 0x81, 0xC4, 12, 0,0,0, // add esp, 12
+ 0x5E, // pop esi
+};
+
+#endif
+
+static const unsigned char GLUE_WHILE_CHECK_RV[] = {
+ 0x85, 0xC0, // test eax, eax
+ 0x0F, 0x85, 0,0,0,0 // jnz looppt
+};
+
+static const unsigned char GLUE_SET_P1_Z[] = { 0x29, 0xC0 }; // sub eax, eax
+static const unsigned char GLUE_SET_P1_NZ[] = { 0xb0, 0x01 }; // mov al, 1
+
+#define GLUE_HAS_FXCH
+static const unsigned char GLUE_FXCH[] = {0xd9, 0xc9};
+
+#define GLUE_HAS_FLDZ
+static const unsigned char GLUE_FLDZ[] = {0xd9, 0xee};
+#define GLUE_HAS_FLD1
+static const unsigned char GLUE_FLD1[] = {0xd9, 0xe8};
+
+static EEL_F negativezeropointfive=-0.5f;
+static EEL_F onepointfive=1.5f;
+#define GLUE_INVSQRT_NEEDREPL &negativezeropointfive, &onepointfive,
+
+
+#define GLUE_HAS_NATIVE_TRIGSQRTLOG
+
+static void *GLUE_realAddress(void *fn, void *fn_e, int *size)
+{
+ static const unsigned char sig[12] = { 0x89, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90 };
+ unsigned char *p = (unsigned char *)fn;
+
+ #if defined(_DEBUG) && defined(_MSC_VER)
+ if (*p == 0xE9) // this means jump to the following address (debug stub)
+ {
+ p += 5 + *(int *)(p+1);
+ }
+ #endif
+
+ while (memcmp(p,sig,sizeof(sig))) p++;
+ p+=sizeof(sig);
+ fn = p;
+
+ while (memcmp(p,sig,sizeof(sig))) p++;
+ *size = p - (unsigned char *)fn;
+ return fn;
+}
+
+#endif
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