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dosbox-wii/src/fpu/fpu_instructions_x86.h

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2009-11-10 09:56:18 +01:00
/*
* Copyright (C) 2002-2009 The DOSBox Team
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
/* $Id: fpu_instructions_x86.h,v 1.7 2009-05-27 09:15:41 qbix79 Exp $ */
// #define WEAK_EXCEPTIONS
#if defined (_MSC_VER)
#ifdef WEAK_EXCEPTIONS
#define clx
#else
#define clx fclex
#endif
#ifdef WEAK_EXCEPTIONS
#define FPUD_LOAD(op,szI,szA) \
__asm { \
__asm mov ebx, store_to \
__asm shl ebx, 4 \
__asm op szI PTR fpu.p_regs[128].m1 \
__asm fstp TBYTE PTR fpu.p_regs[ebx].m1 \
}
#else
#define FPUD_LOAD(op,szI,szA) \
Bit16u new_sw; \
__asm { \
__asm mov eax, 8 \
__asm shl eax, 4 \
__asm mov ebx, store_to \
__asm shl ebx, 4 \
__asm fclex \
__asm op szI PTR fpu.p_regs[eax].m1 \
__asm fnstsw new_sw \
__asm fstp TBYTE PTR fpu.p_regs[ebx].m1 \
} \
fpu.sw=(new_sw&0xffbf)|(fpu.sw&0x80ff);
#endif
#ifdef WEAK_EXCEPTIONS
#define FPUD_LOAD_EA(op,szI,szA) \
__asm { \
__asm op szI PTR fpu.p_regs[128].m1 \
}
#else
#define FPUD_LOAD_EA(op,szI,szA) \
Bit16u new_sw; \
__asm { \
__asm mov eax, 8 \
__asm shl eax, 4 \
__asm fclex \
__asm op szI PTR fpu.p_regs[eax].m1 \
__asm fnstsw new_sw \
} \
fpu.sw=(new_sw&0xffbf)|(fpu.sw&0x80ff);
#endif
#ifdef WEAK_EXCEPTIONS
#define FPUD_STORE(op,szI,szA) \
Bit16u save_cw; \
__asm { \
__asm fnstcw save_cw \
__asm mov eax, TOP \
__asm fldcw fpu.cw_mask_all \
__asm shl eax, 4 \
__asm fld TBYTE PTR fpu.p_regs[eax].m1 \
__asm op szI PTR fpu.p_regs[128].m1 \
__asm fldcw save_cw \
}
#else
#define FPUD_STORE(op,szI,szA) \
Bit16u new_sw,save_cw; \
__asm { \
__asm fnstcw save_cw \
__asm fldcw fpu.cw_mask_all \
__asm mov eax, TOP \
__asm shl eax, 4 \
__asm mov ebx, 8 \
__asm shl ebx, 4 \
__asm fld TBYTE PTR fpu.p_regs[eax].m1 \
__asm clx \
__asm op szI PTR fpu.p_regs[ebx].m1 \
__asm fnstsw new_sw \
__asm fldcw save_cw \
} \
fpu.sw=(new_sw&exc_mask)|(fpu.sw&0x80ff);
#endif
// handles fsin,fcos,f2xm1,fchs,fabs
#define FPUD_TRIG(op) \
Bit16u new_sw; \
__asm { \
__asm mov eax, TOP \
__asm shl eax, 4 \
__asm fld TBYTE PTR fpu.p_regs[eax].m1 \
__asm clx \
__asm op \
__asm fnstsw new_sw \
__asm fstp TBYTE PTR fpu.p_regs[eax].m1 \
} \
fpu.sw=(new_sw&exc_mask)|(fpu.sw&0x80ff);
// handles fsincos
#define FPUD_SINCOS() \
Bit16u new_sw; \
__asm { \
__asm mov eax, TOP \
__asm mov ebx, eax \
__asm dec ebx \
__asm and ebx, 7 \
__asm shl eax, 4 \
__asm shl ebx, 4 \
__asm fld TBYTE PTR fpu.p_regs[eax].m1 \
__asm clx \
__asm fsincos \
__asm fnstsw new_sw \
__asm mov cx, new_sw \
__asm and ch, 0x04 \
__asm jnz argument_too_large1 \
__asm fstp TBYTE PTR fpu.p_regs[ebx].m1 \
__asm fstp TBYTE PTR fpu.p_regs[eax].m1 \
__asm jmp end_sincos \
__asm argument_too_large1: \
__asm fstp st(0) \
__asm end_sincos: \
} \
fpu.sw=(new_sw&exc_mask)|(fpu.sw&0x80ff); \
if ((new_sw&0x0400)==0) FPU_PREP_PUSH();
// handles fptan
#define FPUD_PTAN() \
Bit16u new_sw; \
__asm { \
__asm mov eax, TOP \
__asm mov ebx, eax \
__asm dec ebx \
__asm and ebx, 7 \
__asm shl eax, 4 \
__asm shl ebx, 4 \
__asm fld TBYTE PTR fpu.p_regs[eax].m1 \
__asm clx \
__asm fptan \
__asm fnstsw new_sw \
__asm mov cx, new_sw \
__asm and ch, 0x04 \
__asm jnz argument_too_large2 \
__asm fstp TBYTE PTR fpu.p_regs[ebx].m1 \
__asm fstp TBYTE PTR fpu.p_regs[eax].m1 \
__asm jmp end_ptan \
__asm argument_too_large2: \
__asm fstp st(0) \
__asm end_ptan: \
} \
fpu.sw=(new_sw&exc_mask)|(fpu.sw&0x80ff); \
if ((new_sw&0x0400)==0) FPU_PREP_PUSH();
// handles fxtract
#ifdef WEAK_EXCEPTIONS
#define FPUD_XTRACT \
__asm { \
__asm mov eax, TOP \
__asm mov ebx, eax \
__asm dec ebx \
__asm and ebx, 7 \
__asm shl eax, 4 \
__asm shl ebx, 4 \
__asm fld TBYTE PTR fpu.p_regs[eax].m1 \
__asm fxtract \
__asm fstp TBYTE PTR fpu.p_regs[ebx].m1 \
__asm fstp TBYTE PTR fpu.p_regs[eax].m1 \
} \
FPU_PREP_PUSH();
#else
#define FPUD_XTRACT \
Bit16u new_sw; \
__asm { \
__asm mov eax, TOP \
__asm mov ebx, eax \
__asm dec ebx \
__asm and ebx, 7 \
__asm shl eax, 4 \
__asm shl ebx, 4 \
__asm fld TBYTE PTR fpu.p_regs[eax].m1 \
__asm fclex \
__asm fxtract \
__asm fnstsw new_sw \
__asm fstp TBYTE PTR fpu.p_regs[ebx].m1 \
__asm fstp TBYTE PTR fpu.p_regs[eax].m1 \
} \
fpu.sw=(new_sw&0xffbf)|(fpu.sw&0x80ff); \
FPU_PREP_PUSH();
#endif
// handles fadd,fmul,fsub,fsubr
#ifdef WEAK_EXCEPTIONS
#define FPUD_ARITH1(op) \
Bit16u save_cw; \
__asm { \
__asm fnstcw save_cw \
__asm mov eax, op1 \
__asm shl eax, 4 \
__asm fldcw fpu.cw_mask_all \
__asm mov ebx, op2 \
__asm shl ebx, 4 \
__asm fld TBYTE PTR fpu.p_regs[eax].m1 \
__asm fld TBYTE PTR fpu.p_regs[ebx].m1 \
__asm op st(1), st(0) \
__asm fstp TBYTE PTR fpu.p_regs[eax].m1 \
__asm fldcw save_cw \
}
#else
#define FPUD_ARITH1(op) \
Bit16u new_sw,save_cw; \
__asm { \
__asm fnstcw save_cw \
__asm fldcw fpu.cw_mask_all \
__asm mov eax, op1 \
__asm shl eax, 4 \
__asm mov ebx, op2 \
__asm shl ebx, 4 \
__asm fld TBYTE PTR fpu.p_regs[eax].m1 \
__asm fld TBYTE PTR fpu.p_regs[ebx].m1 \
__asm clx \
__asm op st(1), st(0) \
__asm fnstsw new_sw \
__asm fstp TBYTE PTR fpu.p_regs[eax].m1 \
__asm fldcw save_cw \
} \
fpu.sw=(new_sw&exc_mask)|(fpu.sw&0x80ff);
#endif
// handles fadd,fmul,fsub,fsubr
#ifdef WEAK_EXCEPTIONS
#define FPUD_ARITH1_EA(op) \
Bit16u save_cw; \
__asm { \
__asm fnstcw save_cw \
__asm mov eax, op1 \
__asm fldcw fpu.cw_mask_all \
__asm shl eax, 4 \
__asm fld TBYTE PTR fpu.p_regs[eax].m1 \
__asm fxch \
__asm op st(1), st(0) \
__asm fstp TBYTE PTR fpu.p_regs[eax].m1 \
__asm fldcw save_cw \
}
#else
#define FPUD_ARITH1_EA(op) \
Bit16u new_sw,save_cw; \
__asm { \
__asm fnstcw save_cw \
__asm fldcw fpu.cw_mask_all \
__asm mov eax, op1 \
__asm shl eax, 4 \
__asm fld TBYTE PTR fpu.p_regs[eax].m1 \
__asm fxch \
__asm clx \
__asm op st(1), st(0) \
__asm fnstsw new_sw \
__asm fstp TBYTE PTR fpu.p_regs[eax].m1 \
__asm fldcw save_cw \
} \
fpu.sw=(new_sw&exc_mask)|(fpu.sw&0x80ff);
#endif
// handles fsqrt,frndint
#ifdef WEAK_EXCEPTIONS
#define FPUD_ARITH2(op) \
Bit16u save_cw; \
__asm { \
__asm fnstcw save_cw \
__asm mov eax, TOP \
__asm fldcw fpu.cw_mask_all \
__asm shl eax, 4 \
__asm fld TBYTE PTR fpu.p_regs[eax].m1 \
__asm op \
__asm fstp TBYTE PTR fpu.p_regs[eax].m1 \
__asm fldcw save_cw \
}
#else
#define FPUD_ARITH2(op) \
Bit16u new_sw,save_cw; \
__asm { \
__asm fnstcw save_cw \
__asm fldcw fpu.cw_mask_all \
__asm mov eax, TOP \
__asm shl eax, 4 \
__asm fld TBYTE PTR fpu.p_regs[eax].m1 \
__asm clx \
__asm op \
__asm fnstsw new_sw \
__asm fstp TBYTE PTR fpu.p_regs[eax].m1 \
__asm fldcw save_cw \
} \
fpu.sw=(new_sw&exc_mask)|(fpu.sw&0x80ff);
#endif
// handles fdiv,fdivr
#ifdef WEAK_EXCEPTIONS
#define FPUD_ARITH3(op) \
Bit16u save_cw; \
__asm { \
__asm fnstcw save_cw \
__asm mov eax, op1 \
__asm shl eax, 4 \
__asm fldcw fpu.cw_mask_all \
__asm mov ebx, op2 \
__asm shl ebx, 4 \
__asm fld TBYTE PTR fpu.p_regs[eax].m1 \
__asm fld TBYTE PTR fpu.p_regs[ebx].m1 \
__asm op st(1), st(0) \
__asm fstp TBYTE PTR fpu.p_regs[eax].m1 \
__asm fldcw save_cw \
}
#else
#define FPUD_ARITH3(op) \
Bit16u new_sw,save_cw; \
__asm { \
__asm fnstcw save_cw \
__asm fldcw fpu.cw_mask_all \
__asm mov eax, op1 \
__asm shl eax, 4 \
__asm mov ebx, op2 \
__asm shl ebx, 4 \
__asm fld TBYTE PTR fpu.p_regs[eax].m1 \
__asm fld TBYTE PTR fpu.p_regs[ebx].m1 \
__asm fclex \
__asm op st(1), st(0) \
__asm fnstsw new_sw \
__asm fstp TBYTE PTR fpu.p_regs[eax].m1 \
__asm fldcw save_cw \
} \
fpu.sw=(new_sw&0xffbf)|(fpu.sw&0x80ff);
#endif
// handles fdiv,fdivr
#ifdef WEAK_EXCEPTIONS
#define FPUD_ARITH3_EA(op) \
Bit16u save_cw; \
__asm { \
__asm fnstcw save_cw \
__asm mov eax, op1 \
__asm fldcw fpu.cw_mask_all \
__asm shl eax, 4 \
__asm fld TBYTE PTR fpu.p_regs[eax].m1 \
__asm fxch \
__asm op st(1), st(0) \
__asm fstp TBYTE PTR fpu.p_regs[eax].m1 \
__asm fldcw save_cw \
}
#else
#define FPUD_ARITH3_EA(op) \
Bit16u new_sw,save_cw; \
__asm { \
__asm fnstcw save_cw \
__asm mov eax, op1 \
__asm fldcw fpu.cw_mask_all \
__asm shl eax, 4 \
__asm fld TBYTE PTR fpu.p_regs[eax].m1 \
__asm fxch \
__asm fclex \
__asm op st(1), st(0) \
__asm fnstsw new_sw \
__asm fstp TBYTE PTR fpu.p_regs[eax].m1 \
__asm fldcw save_cw \
} \
fpu.sw=(new_sw&0xffbf)|(fpu.sw&0x80ff);
#endif
// handles fprem,fprem1,fscale
#define FPUD_REMINDER(op) \
Bit16u new_sw; \
__asm { \
__asm mov eax, TOP \
__asm mov ebx, eax \
__asm inc ebx \
__asm and ebx, 7 \
__asm shl ebx, 4 \
__asm shl eax, 4 \
__asm fld TBYTE PTR fpu.p_regs[ebx].m1 \
__asm fld TBYTE PTR fpu.p_regs[eax].m1 \
__asm fclex \
__asm op \
__asm fnstsw new_sw \
__asm fstp TBYTE PTR fpu.p_regs[eax].m1 \
__asm fstp st(0) \
} \
fpu.sw=(new_sw&0xffbf)|(fpu.sw&0x80ff);
// handles fcom,fucom
#define FPUD_COMPARE(op) \
Bit16u new_sw; \
__asm { \
__asm mov ebx, op2 \
__asm mov eax, op1 \
__asm shl ebx, 4 \
__asm shl eax, 4 \
__asm fld TBYTE PTR fpu.p_regs[ebx].m1 \
__asm fld TBYTE PTR fpu.p_regs[eax].m1 \
__asm clx \
__asm op \
__asm fnstsw new_sw \
} \
fpu.sw=(new_sw&exc_mask)|(fpu.sw&0x80ff);
#define FPUD_COMPARE_EA(op) \
Bit16u new_sw; \
__asm { \
__asm mov eax, op1 \
__asm shl eax, 4 \
__asm fld TBYTE PTR fpu.p_regs[eax].m1 \
__asm clx \
__asm op \
__asm fnstsw new_sw \
} \
fpu.sw=(new_sw&exc_mask)|(fpu.sw&0x80ff);
// handles fxam,ftst
#define FPUD_EXAMINE(op) \
Bit16u new_sw; \
__asm { \
__asm mov eax, TOP \
__asm shl eax, 4 \
__asm fld TBYTE PTR fpu.p_regs[eax].m1 \
__asm clx \
__asm op \
__asm fnstsw new_sw \
__asm fstp st(0) \
} \
fpu.sw=(new_sw&exc_mask)|(fpu.sw&0x80ff);
// handles fpatan,fyl2xp1
#ifdef WEAK_EXCEPTIONS
#define FPUD_WITH_POP(op) \
__asm { \
__asm mov eax, TOP \
__asm mov ebx, eax \
__asm inc ebx \
__asm and ebx, 7 \
__asm shl ebx, 4 \
__asm shl eax, 4 \
__asm fld TBYTE PTR fpu.p_regs[ebx].m1 \
__asm fld TBYTE PTR fpu.p_regs[eax].m1 \
__asm op \
__asm fstp TBYTE PTR fpu.p_regs[ebx].m1 \
} \
FPU_FPOP();
#else
#define FPUD_WITH_POP(op) \
Bit16u new_sw; \
__asm { \
__asm mov eax, TOP \
__asm mov ebx, eax \
__asm inc ebx \
__asm and ebx, 7 \
__asm shl ebx, 4 \
__asm shl eax, 4 \
__asm fld TBYTE PTR fpu.p_regs[ebx].m1 \
__asm fld TBYTE PTR fpu.p_regs[eax].m1 \
__asm fclex \
__asm op \
__asm fnstsw new_sw \
__asm fstp TBYTE PTR fpu.p_regs[ebx].m1 \
} \
fpu.sw=(new_sw&0xffbf)|(fpu.sw&0x80ff); \
FPU_FPOP();
#endif
// handles fyl2x
#ifdef WEAK_EXCEPTIONS
#define FPUD_FYL2X(op) \
__asm { \
__asm mov eax, TOP \
__asm mov ebx, eax \
__asm inc ebx \
__asm and ebx, 7 \
__asm shl ebx, 4 \
__asm shl eax, 4 \
__asm fld TBYTE PTR fpu.p_regs[ebx].m1 \
__asm fld TBYTE PTR fpu.p_regs[eax].m1 \
__asm op \
__asm fstp TBYTE PTR fpu.p_regs[ebx].m1 \
} \
FPU_FPOP();
#else
#define FPUD_FYL2X(op) \
Bit16u new_sw; \
__asm { \
__asm mov eax, TOP \
__asm mov ebx, eax \
__asm inc ebx \
__asm and ebx, 7 \
__asm shl ebx, 4 \
__asm shl eax, 4 \
__asm fld TBYTE PTR fpu.p_regs[ebx].m1 \
__asm fld TBYTE PTR fpu.p_regs[eax].m1 \
__asm fclex \
__asm op \
__asm fnstsw new_sw \
__asm fstp TBYTE PTR fpu.p_regs[ebx].m1 \
} \
fpu.sw=(new_sw&0xffbf)|(fpu.sw&0x80ff); \
FPU_FPOP();
#endif
// load math constants
#define FPUD_LOAD_CONST(op) \
FPU_PREP_PUSH(); \
__asm { \
__asm mov eax, TOP \
__asm shl eax, 4 \
__asm clx \
__asm op \
__asm fstp TBYTE PTR fpu.p_regs[eax].m1 \
} \
#else
#ifdef WEAK_EXCEPTIONS
#define clx
#else
#define clx "fclex"
#endif
#ifdef WEAK_EXCEPTIONS
#define FPUD_LOAD(op,szI,szA) \
__asm__ volatile ( \
"movl $128, %%eax \n" \
"shl $4, %0 \n" \
#op #szA " (%1, %%eax) \n" \
"fstpt (%1, %0) " \
: \
: "r" (store_to), "r" (fpu.p_regs) \
: "eax", "memory" \
);
#else
#define FPUD_LOAD(op,szI,szA) \
Bit16u new_sw; \
__asm__ volatile ( \
"movl $8, %%eax \n" \
"shl $4, %%eax \n" \
"shl $4, %1 \n" \
"fclex \n" \
#op #szA " (%2, %%eax) \n" \
"fnstsw %0 \n" \
"fstpt (%2, %1) " \
: "=m" (new_sw) \
: "r" (store_to), "r" (fpu.p_regs) \
: "eax", "memory" \
); \
fpu.sw=(new_sw&0xffbf)|(fpu.sw&0x80ff);
#endif
#ifdef WEAK_EXCEPTIONS
#define FPUD_LOAD_EA(op,szI,szA) \
__asm__ volatile ( \
"movl $128, %%eax \n" \
#op #szA " (%0, %%eax) \n" \
: \
: "r" (fpu.p_regs) \
: "eax", "memory" \
);
#else
#define FPUD_LOAD_EA(op,szI,szA) \
Bit16u new_sw; \
__asm__ volatile ( \
"movl $8, %%eax \n" \
"shl $4, %%eax \n" \
"fclex \n" \
#op #szA " (%1, %%eax) \n" \
"fnstsw %0 \n" \
: "=m" (new_sw) \
: "r" (fpu.p_regs) \
: "eax", "memory" \
); \
fpu.sw=(new_sw&0xffbf)|(fpu.sw&0x80ff);
#endif
#ifdef WEAK_EXCEPTIONS
#define FPUD_STORE(op,szI,szA) \
Bit16u save_cw; \
__asm__ volatile ( \
"fnstcw %0 \n" \
"shll $4, %1 \n" \
"fldcw %3 \n" \
"movl $128, %%eax \n" \
"fldt (%2, %1) \n" \
#op #szA " (%2, %%eax) \n" \
"fldcw %0 " \
: "=m" (save_cw) \
: "r" (TOP), "r" (fpu.p_regs), "m" (fpu.cw_mask_all) \
: "eax", "memory" \
);
#else
#define FPUD_STORE(op,szI,szA) \
Bit16u new_sw,save_cw; \
__asm__ volatile ( \
"fnstcw %1 \n" \
"fldcw %4 \n" \
"shll $4, %2 \n" \
"movl $8, %%eax \n" \
"shl $4, %%eax \n" \
"fldt (%3, %2) \n" \
clx" \n" \
#op #szA " (%3, %%eax) \n" \
"fnstsw %0 \n" \
"fldcw %1 " \
: "=m" (new_sw), "=m" (save_cw) \
: "r" (TOP), "r" (fpu.p_regs), "m" (fpu.cw_mask_all) \
: "eax", "memory" \
); \
fpu.sw=(new_sw&exc_mask)|(fpu.sw&0x80ff);
#endif
// handles fsin,fcos,f2xm1,fchs,fabs
#define FPUD_TRIG(op) \
Bit16u new_sw; \
__asm__ volatile ( \
"shll $4, %1 \n" \
"fldt (%2, %1) \n" \
clx" \n" \
#op" \n" \
"fnstsw %0 \n" \
"fstpt (%2, %1) " \
: "=m" (new_sw) \
: "r" (TOP), "r" (fpu.p_regs) \
: "memory" \
); \
fpu.sw=(new_sw&exc_mask)|(fpu.sw&0x80ff);
// handles fsincos
#define FPUD_SINCOS() \
Bit16u new_sw; \
__asm__ volatile ( \
"movl %1, %%eax \n" \
"shll $4, %1 \n" \
"decl %%eax \n" \
"andl $7, %%eax \n" \
"shll $4, %%eax \n" \
"fldt (%2, %1) \n" \
clx" \n" \
"fsincos \n" \
"fnstsw %0 \n" \
"fstpt (%2, %%eax) \n" \
"movw %0, %%ax \n" \
"sahf \n" \
"jp argument_too_large1 \n" \
"fstpt (%2, %1) \n" \
"argument_too_large1: " \
: "=m" (new_sw) \
: "r" (TOP), "r" (fpu.p_regs) \
: "eax", "cc", "memory" \
); \
fpu.sw=(new_sw&exc_mask)|(fpu.sw&0x80ff); \
if ((new_sw&0x0400)==0) FPU_PREP_PUSH();
// handles fptan
#define FPUD_PTAN() \
Bit16u new_sw; \
__asm__ volatile ( \
"movl %1, %%eax \n" \
"shll $4, %1 \n" \
"decl %%eax \n" \
"andl $7, %%eax \n" \
"shll $4, %%eax \n" \
"fldt (%2, %1) \n" \
clx" \n" \
"fptan \n" \
"fnstsw %0 \n" \
"fstpt (%2, %%eax) \n" \
"movw %0, %%ax \n" \
"sahf \n" \
"jp argument_too_large2 \n" \
"fstpt (%2, %1) \n" \
"argument_too_large2: " \
: "=m" (new_sw) \
: "r" (TOP), "r" (fpu.p_regs) \
: "eax", "cc", "memory" \
); \
fpu.sw=(new_sw&exc_mask)|(fpu.sw&0x80ff); \
if ((new_sw&0x0400)==0) FPU_PREP_PUSH();
// handles fxtract
#ifdef WEAK_EXCEPTIONS
#define FPUD_XTRACT \
__asm__ volatile ( \
"movl %0, %%eax \n" \
"shll $4, %0 \n" \
"decl %%eax \n" \
"andl $7, %%eax \n" \
"shll $4, %%eax \n" \
"fldt (%1, %0) \n" \
"fxtract \n" \
"fstpt (%1, %%eax) \n" \
"fstpt (%1, %0) " \
: \
: "r" (TOP), "r" (fpu.p_regs) \
: "eax", "memory" \
); \
FPU_PREP_PUSH();
#else
#define FPUD_XTRACT \
Bit16u new_sw; \
__asm__ volatile ( \
"movl %1, %%eax \n" \
"shll $4, %1 \n" \
"decl %%eax \n" \
"andl $7, %%eax \n" \
"shll $4, %%eax \n" \
"fldt (%2, %1) \n" \
"fclex \n" \
"fxtract \n" \
"fnstsw %0 \n" \
"fstpt (%2, %%eax) \n" \
"fstpt (%2, %1) " \
: "=m" (new_sw) \
: "r" (TOP), "r" (fpu.p_regs) \
: "eax", "memory" \
); \
fpu.sw=(new_sw&0xffbf)|(fpu.sw&0x80ff); \
FPU_PREP_PUSH();
#endif
// handles fadd,fmul,fsub,fsubr
#ifdef WEAK_EXCEPTIONS
#define FPUD_ARITH1(op) \
Bit16u save_cw; \
__asm__ volatile ( \
"fnstcw %0 \n" \
"fldcw %4 \n" \
"shll $4, %2 \n" \
"shll $4, %1 \n" \
"fldt (%3, %2) \n" \
"fldt (%3, %1) \n" \
#op" \n" \
"fstpt (%3, %1) \n" \
"fldcw %0 " \
: "=m" (save_cw) \
: "r" (op1), "r" (op2), "r" (fpu.p_regs), "m" (fpu.cw_mask_all) \
: "memory" \
);
#else
#define FPUD_ARITH1(op) \
Bit16u new_sw,save_cw; \
__asm__ volatile ( \
"fnstcw %1 \n" \
"fldcw %5 \n" \
"shll $4, %3 \n" \
"shll $4, %2 \n" \
"fldt (%4, %3) \n" \
"fldt (%4, %2) \n" \
clx" \n" \
#op" \n" \
"fnstsw %0 \n" \
"fstpt (%4, %2) \n" \
"fldcw %1 " \
: "=m" (new_sw), "=m" (save_cw) \
: "r" (op1), "r" (op2), "r" (fpu.p_regs), "m" (fpu.cw_mask_all) \
: "memory" \
); \
fpu.sw=(new_sw&exc_mask)|(fpu.sw&0x80ff);
#endif
// handles fadd,fmul,fsub,fsubr
#ifdef WEAK_EXCEPTIONS
#define FPUD_ARITH1_EA(op) \
Bit16u save_cw; \
__asm__ volatile ( \
"fnstcw %0 \n" \
"fldcw %3 \n" \
"shll $4, %1 \n" \
"fldt (%2, %1) \n" \
#op" \n" \
"fstpt (%2, %1) \n" \
"fldcw %0 " \
: "=m" (save_cw) \
: "r" (op1), "r" (fpu.p_regs), "m" (fpu.cw_mask_all) \
: "memory" \
);
#else
#define FPUD_ARITH1_EA(op) \
Bit16u new_sw,save_cw; \
__asm__ volatile ( \
"fnstcw %1 \n" \
"fldcw %4 \n" \
"shll $4, %2 \n" \
"fldt (%3, %2) \n" \
clx" \n" \
#op" \n" \
"fnstsw %0 \n" \
"fstpt (%3, %2) \n" \
"fldcw %1 " \
: "=m" (new_sw), "=m" (save_cw) \
: "r" (op1), "r" (fpu.p_regs), "m" (fpu.cw_mask_all) \
: "memory" \
); \
fpu.sw=(new_sw&exc_mask)|(fpu.sw&0x80ff);
#endif
// handles fsqrt,frndint
#ifdef WEAK_EXCEPTIONS
#define FPUD_ARITH2(op) \
Bit16u save_cw; \
__asm__ volatile ( \
"fnstcw %0 \n" \
"fldcw %3 \n" \
"shll $4, %1 \n" \
"fldt (%2, %1) \n" \
#op" \n" \
"fstpt (%2, %1) \n" \
"fldcw %0 " \
: "=m" (save_cw) \
: "r" (TOP), "r" (fpu.p_regs), "m" (fpu.cw_mask_all) \
: "memory" \
);
#else
#define FPUD_ARITH2(op) \
Bit16u new_sw,save_cw; \
__asm__ volatile ( \
"fnstcw %1 \n" \
"fldcw %4 \n" \
"shll $4, %2 \n" \
"fldt (%3, %2) \n" \
clx" \n" \
#op" \n" \
"fnstsw %0 \n" \
"fstpt (%3, %2) \n" \
"fldcw %1 " \
: "=m" (new_sw), "=m" (save_cw) \
: "r" (TOP), "r" (fpu.p_regs), "m" (fpu.cw_mask_all) \
: "memory" \
); \
fpu.sw=(new_sw&exc_mask)|(fpu.sw&0x80ff);
#endif
// handles fdiv,fdivr
#ifdef WEAK_EXCEPTIONS
#define FPUD_ARITH3(op) \
Bit16u save_cw; \
__asm__ volatile ( \
"fnstcw %0 \n" \
"fldcw %4 \n" \
"shll $4, %2 \n" \
"shll $4, %1 \n" \
"fldt (%3, %2) \n" \
"fldt (%3, %1) \n" \
#op" \n" \
"fstpt (%3, %1) \n" \
"fldcw %0 " \
: "=m" (save_cw) \
: "r" (op1), "r" (op2), "r" (fpu.p_regs), "m" (fpu.cw_mask_all) \
: "memory" \
);
#else
#define FPUD_ARITH3(op) \
Bit16u new_sw,save_cw; \
__asm__ volatile ( \
"fnstcw %1 \n" \
"fldcw %5 \n" \
"shll $4, %3 \n" \
"shll $4, %2 \n" \
"fldt (%4, %3) \n" \
"fldt (%4, %2) \n" \
"fclex \n" \
#op" \n" \
"fnstsw %0 \n" \
"fstpt (%4, %2) \n" \
"fldcw %1 " \
: "=m" (new_sw), "=m" (save_cw) \
: "r" (op1), "r" (op2), "r" (fpu.p_regs), "m" (fpu.cw_mask_all) \
: "memory" \
); \
fpu.sw=(new_sw&0xffbf)|(fpu.sw&0x80ff);
#endif
// handles fdiv,fdivr
#ifdef WEAK_EXCEPTIONS
#define FPUD_ARITH3_EA(op) \
Bit16u save_cw; \
__asm__ volatile ( \
"fnstcw %0 \n" \
"fldcw %3 \n" \
"shll $4, %1 \n" \
"fldt (%2, %1) \n" \
#op" \n" \
"fstpt (%2, %1) \n" \
"fldcw %0 " \
: "=m" (save_cw) \
: "r" (op1), "r" (fpu.p_regs), "m" (fpu.cw_mask_all) \
: "memory" \
);
#else
#define FPUD_ARITH3_EA(op) \
Bit16u new_sw,save_cw; \
__asm__ volatile ( \
"fnstcw %1 \n" \
"fldcw %4 \n" \
"shll $4, %2 \n" \
"fldt (%3, %2) \n" \
"fclex \n" \
#op" \n" \
"fnstsw %0 \n" \
"fstpt (%3, %2) \n" \
"fldcw %1 " \
: "=m" (new_sw), "=m" (save_cw) \
: "r" (op1), "r" (fpu.p_regs), "m" (fpu.cw_mask_all) \
: "memory" \
); \
fpu.sw=(new_sw&0xffbf)|(fpu.sw&0x80ff);
#endif
// handles fprem,fprem1,fscale
#define FPUD_REMINDER(op) \
Bit16u new_sw; \
__asm__ volatile ( \
"movl %1, %%eax \n" \
"incl %%eax \n" \
"andl $7, %%eax \n" \
"shll $4, %%eax \n" \
"shll $4, %1 \n" \
"fldt (%2, %%eax) \n" \
"fldt (%2, %1) \n" \
"fclex \n" \
#op" \n" \
"fnstsw %0 \n" \
"fstpt (%2, %1) \n" \
"fstp %%st(0) " \
: "=m" (new_sw) \
: "r" (TOP), "r" (fpu.p_regs) \
: "eax", "memory" \
); \
fpu.sw=(new_sw&0xffbf)|(fpu.sw&0x80ff);
// handles fcom,fucom
#define FPUD_COMPARE(op) \
Bit16u new_sw; \
__asm__ volatile ( \
"shll $4, %2 \n" \
"shll $4, %1 \n" \
"fldt (%3, %2) \n" \
"fldt (%3, %1) \n" \
clx" \n" \
#op" \n" \
"fnstsw %0 " \
: "=m" (new_sw) \
: "r" (op1), "r" (op2), "r" (fpu.p_regs) \
: "memory" \
); \
fpu.sw=(new_sw&exc_mask)|(fpu.sw&0x80ff);
// handles fcom,fucom
#define FPUD_COMPARE_EA(op) \
Bit16u new_sw; \
__asm__ volatile ( \
"shll $4, %1 \n" \
"fldt (%2, %1) \n" \
clx" \n" \
#op" \n" \
"fnstsw %0 " \
: "=m" (new_sw) \
: "r" (op1), "r" (fpu.p_regs) \
: "memory" \
); \
fpu.sw=(new_sw&exc_mask)|(fpu.sw&0x80ff);
// handles fxam,ftst
#define FPUD_EXAMINE(op) \
Bit16u new_sw; \
__asm__ volatile ( \
"shll $4, %1 \n" \
"fldt (%2, %1) \n" \
clx" \n" \
#op" \n" \
"fnstsw %0 \n" \
"fstp %%st(0) " \
: "=m" (new_sw) \
: "r" (TOP), "r" (fpu.p_regs) \
: "memory" \
); \
fpu.sw=(new_sw&exc_mask)|(fpu.sw&0x80ff);
// handles fpatan,fyl2xp1
#ifdef WEAK_EXCEPTIONS
#define FPUD_WITH_POP(op) \
__asm__ volatile ( \
"movl %0, %%eax \n" \
"incl %%eax \n" \
"andl $7, %%eax \n" \
"shll $4, %%eax \n" \
"shll $4, %0 \n" \
"fldt (%1, %%eax) \n" \
"fldt (%1, %0) \n" \
#op" \n" \
"fstpt (%1, %%eax) \n" \
: \
: "r" (TOP), "r" (fpu.p_regs) \
: "eax", "memory" \
); \
FPU_FPOP();
#else
#define FPUD_WITH_POP(op) \
Bit16u new_sw; \
__asm__ volatile ( \
"movl %1, %%eax \n" \
"incl %%eax \n" \
"andl $7, %%eax \n" \
"shll $4, %%eax \n" \
"shll $4, %1 \n" \
"fldt (%2, %%eax) \n" \
"fldt (%2, %1) \n" \
"fclex \n" \
#op" \n" \
"fnstsw %0 \n" \
"fstpt (%2, %%eax) \n" \
: "=m" (new_sw) \
: "r" (TOP), "r" (fpu.p_regs) \
: "eax", "memory" \
); \
fpu.sw=(new_sw&0xffbf)|(fpu.sw&0x80ff); \
FPU_FPOP();
#endif
// handles fyl2x
#ifdef WEAK_EXCEPTIONS
#define FPUD_FYL2X(op) \
__asm__ volatile ( \
"movl %0, %%eax \n" \
"incl %%eax \n" \
"andl $7, %%eax \n" \
"shll $4, %%eax \n" \
"shll $4, %0 \n" \
"fldt (%1, %%eax) \n" \
"fldt (%1, %0) \n" \
#op" \n" \
"fstpt (%1, %%eax) \n" \
: \
: "r" (TOP), "r" (fpu.p_regs) \
: "eax", "memory" \
); \
FPU_FPOP();
#else
#define FPUD_FYL2X(op) \
Bit16u new_sw; \
__asm__ volatile ( \
"movl %1, %%eax \n" \
"incl %%eax \n" \
"andl $7, %%eax \n" \
"shll $4, %%eax \n" \
"shll $4, %1 \n" \
"fldt (%2, %%eax) \n" \
"fldt (%2, %1) \n" \
"fclex \n" \
#op" \n" \
"fnstsw %0 \n" \
"fstpt (%2, %%eax) \n" \
: "=m" (new_sw) \
: "r" (TOP), "r" (fpu.p_regs) \
: "eax", "memory" \
); \
fpu.sw=(new_sw&0xffbf)|(fpu.sw&0x80ff); \
FPU_FPOP();
#endif
// load math constants
#define FPUD_LOAD_CONST(op) \
FPU_PREP_PUSH(); \
__asm__ volatile ( \
"shll $4, %0 \n" \
clx" \n" \
#op" \n" \
"fstpt (%1, %0) \n" \
: \
: "r" (TOP), "r" (fpu.p_regs) \
: "memory" \
);
#endif
#ifdef WEAK_EXCEPTIONS
const Bit16u exc_mask=0x7f00;
#else
const Bit16u exc_mask=0xffbf;
#endif
static void FPU_FINIT(void) {
FPU_SetCW(0x37F);
fpu.sw=0;
TOP=FPU_GET_TOP();
fpu.tags[0]=TAG_Empty;
fpu.tags[1]=TAG_Empty;
fpu.tags[2]=TAG_Empty;
fpu.tags[3]=TAG_Empty;
fpu.tags[4]=TAG_Empty;
fpu.tags[5]=TAG_Empty;
fpu.tags[6]=TAG_Empty;
fpu.tags[7]=TAG_Empty;
fpu.tags[8]=TAG_Valid; // is only used by us
}
static void FPU_FCLEX(void){
fpu.sw&=0x7f00; //should clear exceptions
}
static void FPU_FNOP(void){
}
static void FPU_PREP_PUSH(void){
TOP = (TOP - 1) &7;
fpu.tags[TOP]=TAG_Valid;
}
static void FPU_FPOP(void){
fpu.tags[TOP]=TAG_Empty;
TOP = ((TOP+1)&7);
}
static void FPU_FLD_F32(PhysPt addr,Bitu store_to) {
fpu.p_regs[8].m1 = mem_readd(addr);
FPUD_LOAD(fld,DWORD,s)
}
static void FPU_FLD_F32_EA(PhysPt addr) {
fpu.p_regs[8].m1 = mem_readd(addr);
FPUD_LOAD_EA(fld,DWORD,s)
}
static void FPU_FLD_F64(PhysPt addr,Bitu store_to) {
fpu.p_regs[8].m1 = mem_readd(addr);
fpu.p_regs[8].m2 = mem_readd(addr+4);
FPUD_LOAD(fld,QWORD,l)
}
static void FPU_FLD_F64_EA(PhysPt addr) {
fpu.p_regs[8].m1 = mem_readd(addr);
fpu.p_regs[8].m2 = mem_readd(addr+4);
FPUD_LOAD_EA(fld,QWORD,l)
}
static void FPU_FLD_F80(PhysPt addr) {
fpu.p_regs[TOP].m1 = mem_readd(addr);
fpu.p_regs[TOP].m2 = mem_readd(addr+4);
fpu.p_regs[TOP].m3 = mem_readw(addr+8);
FPU_SET_C1(0);
}
static void FPU_FLD_I16(PhysPt addr,Bitu store_to) {
fpu.p_regs[8].m1 = (Bit32u)mem_readw(addr);
FPUD_LOAD(fild,WORD,)
}
static void FPU_FLD_I16_EA(PhysPt addr) {
fpu.p_regs[8].m1 = (Bit32u)mem_readw(addr);
FPUD_LOAD_EA(fild,WORD,)
}
static void FPU_FLD_I32(PhysPt addr,Bitu store_to) {
fpu.p_regs[8].m1 = mem_readd(addr);
FPUD_LOAD(fild,DWORD,l)
}
static void FPU_FLD_I32_EA(PhysPt addr) {
fpu.p_regs[8].m1 = mem_readd(addr);
FPUD_LOAD_EA(fild,DWORD,l)
}
static void FPU_FLD_I64(PhysPt addr,Bitu store_to) {
fpu.p_regs[8].m1 = mem_readd(addr);
fpu.p_regs[8].m2 = mem_readd(addr+4);
FPUD_LOAD(fild,QWORD,q)
}
static void FPU_FBLD(PhysPt addr,Bitu store_to) {
fpu.p_regs[8].m1 = mem_readd(addr);
fpu.p_regs[8].m2 = mem_readd(addr+4);
fpu.p_regs[8].m3 = mem_readw(addr+8);
FPUD_LOAD(fbld,TBYTE,)
}
static void FPU_FST_F32(PhysPt addr) {
FPUD_STORE(fstp,DWORD,s)
mem_writed(addr,fpu.p_regs[8].m1);
}
static void FPU_FST_F64(PhysPt addr) {
FPUD_STORE(fstp,QWORD,l)
mem_writed(addr,fpu.p_regs[8].m1);
mem_writed(addr+4,fpu.p_regs[8].m2);
}
static void FPU_FST_F80(PhysPt addr) {
mem_writed(addr,fpu.p_regs[TOP].m1);
mem_writed(addr+4,fpu.p_regs[TOP].m2);
mem_writew(addr+8,fpu.p_regs[TOP].m3);
FPU_SET_C1(0);
}
static void FPU_FST_I16(PhysPt addr) {
FPUD_STORE(fistp,WORD,)
mem_writew(addr,(Bit16u)fpu.p_regs[8].m1);
}
static void FPU_FST_I32(PhysPt addr) {
FPUD_STORE(fistp,DWORD,l)
mem_writed(addr,fpu.p_regs[8].m1);
}
static void FPU_FST_I64(PhysPt addr) {
FPUD_STORE(fistp,QWORD,q)
mem_writed(addr,fpu.p_regs[8].m1);
mem_writed(addr+4,fpu.p_regs[8].m2);
}
static void FPU_FBST(PhysPt addr) {
FPUD_STORE(fbstp,TBYTE,)
mem_writed(addr,fpu.p_regs[8].m1);
mem_writed(addr+4,fpu.p_regs[8].m2);
mem_writew(addr+8,fpu.p_regs[8].m3);
}
static void FPU_FSIN(void){
FPUD_TRIG(fsin)
}
static void FPU_FSINCOS(void){
FPUD_SINCOS()
}
static void FPU_FCOS(void){
FPUD_TRIG(fcos)
}
static void FPU_FSQRT(void){
FPUD_ARITH2(fsqrt)
}
static void FPU_FPATAN(void){
FPUD_WITH_POP(fpatan)
}
static void FPU_FPTAN(void){
FPUD_PTAN()
}
static void FPU_FADD(Bitu op1, Bitu op2){
FPUD_ARITH1(faddp)
}
static void FPU_FADD_EA(Bitu op1){
FPUD_ARITH1_EA(faddp)
}
static void FPU_FDIV(Bitu op1, Bitu op2){
FPUD_ARITH3(fdivp)
}
static void FPU_FDIV_EA(Bitu op1){
FPUD_ARITH3_EA(fdivp)
}
static void FPU_FDIVR(Bitu op1, Bitu op2){
FPUD_ARITH3(fdivrp)
}
static void FPU_FDIVR_EA(Bitu op1){
FPUD_ARITH3_EA(fdivrp)
}
static void FPU_FMUL(Bitu op1, Bitu op2){
FPUD_ARITH1(fmulp)
}
static void FPU_FMUL_EA(Bitu op1){
FPUD_ARITH1_EA(fmulp)
}
static void FPU_FSUB(Bitu op1, Bitu op2){
FPUD_ARITH1(fsubp)
}
static void FPU_FSUB_EA(Bitu op1){
FPUD_ARITH1_EA(fsubp)
}
static void FPU_FSUBR(Bitu op1, Bitu op2){
FPUD_ARITH1(fsubrp)
}
static void FPU_FSUBR_EA(Bitu op1){
FPUD_ARITH1_EA(fsubrp)
}
static void FPU_FXCH(Bitu stv, Bitu other){
FPU_Tag tag = fpu.tags[other];
fpu.tags[other] = fpu.tags[stv];
fpu.tags[stv] = tag;
Bit32u m1s = fpu.p_regs[other].m1;
Bit32u m2s = fpu.p_regs[other].m2;
Bit16u m3s = fpu.p_regs[other].m3;
fpu.p_regs[other].m1 = fpu.p_regs[stv].m1;
fpu.p_regs[other].m2 = fpu.p_regs[stv].m2;
fpu.p_regs[other].m3 = fpu.p_regs[stv].m3;
fpu.p_regs[stv].m1 = m1s;
fpu.p_regs[stv].m2 = m2s;
fpu.p_regs[stv].m3 = m3s;
FPU_SET_C1(0);
}
static void FPU_FST(Bitu stv, Bitu other){
fpu.tags[other] = fpu.tags[stv];
fpu.p_regs[other].m1 = fpu.p_regs[stv].m1;
fpu.p_regs[other].m2 = fpu.p_regs[stv].m2;
fpu.p_regs[other].m3 = fpu.p_regs[stv].m3;
FPU_SET_C1(0);
}
static void FPU_FCOM(Bitu op1, Bitu op2){
FPUD_COMPARE(fcompp)
}
static void FPU_FCOM_EA(Bitu op1){
FPUD_COMPARE_EA(fcompp)
}
static void FPU_FUCOM(Bitu op1, Bitu op2){
FPUD_COMPARE(fucompp)
}
static void FPU_FRNDINT(void){
FPUD_ARITH2(frndint)
}
static void FPU_FPREM(void){
FPUD_REMINDER(fprem)
}
static void FPU_FPREM1(void){
FPUD_REMINDER(fprem1)
}
static void FPU_FXAM(void){
FPUD_EXAMINE(fxam)
// handle empty registers (C1 set to sign in any way!)
if(fpu.tags[TOP] == TAG_Empty) {
FPU_SET_C3(1);FPU_SET_C2(0);FPU_SET_C0(1);
return;
}
}
static void FPU_F2XM1(void){
FPUD_TRIG(f2xm1)
}
static void FPU_FYL2X(void){
FPUD_FYL2X(fyl2x)
}
static void FPU_FYL2XP1(void){
FPUD_WITH_POP(fyl2xp1)
}
static void FPU_FSCALE(void){
FPUD_REMINDER(fscale)
}
static void FPU_FSTENV(PhysPt addr){
FPU_SET_TOP(TOP);
if(!cpu.code.big) {
mem_writew(addr+0,static_cast<Bit16u>(fpu.cw));
mem_writew(addr+2,static_cast<Bit16u>(fpu.sw));
mem_writew(addr+4,static_cast<Bit16u>(FPU_GetTag()));
} else {
mem_writed(addr+0,static_cast<Bit32u>(fpu.cw));
mem_writed(addr+4,static_cast<Bit32u>(fpu.sw));
mem_writed(addr+8,static_cast<Bit32u>(FPU_GetTag()));
}
}
static void FPU_FLDENV(PhysPt addr){
Bit16u tag;
Bit32u tagbig;
Bitu cw;
if(!cpu.code.big) {
cw = mem_readw(addr+0);
fpu.sw = mem_readw(addr+2);
tag = mem_readw(addr+4);
} else {
cw = mem_readd(addr+0);
fpu.sw = (Bit16u)mem_readd(addr+4);
tagbig = mem_readd(addr+8);
tag = static_cast<Bit16u>(tagbig);
}
FPU_SetTag(tag);
FPU_SetCW(cw);
TOP=FPU_GET_TOP();
}
static void FPU_FSAVE(PhysPt addr){
FPU_FSTENV(addr);
Bitu start=(cpu.code.big?28:14);
for(Bitu i=0;i<8;i++){
mem_writed(addr+start,fpu.p_regs[STV(i)].m1);
mem_writed(addr+start+4,fpu.p_regs[STV(i)].m2);
mem_writew(addr+start+8,fpu.p_regs[STV(i)].m3);
start+=10;
}
FPU_FINIT();
}
static void FPU_FRSTOR(PhysPt addr){
FPU_FLDENV(addr);
Bitu start=(cpu.code.big?28:14);
for(Bitu i=0;i<8;i++){
fpu.p_regs[STV(i)].m1 = mem_readd(addr+start);
fpu.p_regs[STV(i)].m2 = mem_readd(addr+start+4);
fpu.p_regs[STV(i)].m3 = mem_readw(addr+start+8);
start+=10;
}
}
static void FPU_FXTRACT(void) {
FPUD_XTRACT
}
static void FPU_FCHS(void){
FPUD_TRIG(fchs)
}
static void FPU_FABS(void){
FPUD_TRIG(fabs)
}
static void FPU_FTST(void){
FPUD_EXAMINE(ftst)
}
static void FPU_FLD1(void){
FPUD_LOAD_CONST(fld1)
}
static void FPU_FLDL2T(void){
FPUD_LOAD_CONST(fldl2t)
}
static void FPU_FLDL2E(void){
FPUD_LOAD_CONST(fldl2e)
}
static void FPU_FLDPI(void){
FPUD_LOAD_CONST(fldpi)
}
static void FPU_FLDLG2(void){
FPUD_LOAD_CONST(fldlg2)
}
static void FPU_FLDLN2(void){
FPUD_LOAD_CONST(fldln2)
}
static void FPU_FLDZ(void){
FPUD_LOAD_CONST(fldz)
fpu.tags[TOP]=TAG_Zero;
}
Reference in New Issue Copy Permalink