forked from 0ad/0ad
janwas
9476dc4ad0
sysdep: remove round; document several functions; use ia32.h header instead of a hack that extern-declared sysdep functions that are implemented as macro-redirection wsdl: add SDL_EnableKeyRepeat stub; group related functions in header together; no longer need OS_WIN wrapper around that This was SVN commit r3115.
139 lines
3.5 KiB
C
Executable File
139 lines
3.5 KiB
C
Executable File
// IA-32 (x86) specific code
|
|
// Copyright (c) 2003 Jan Wassenberg
|
|
//
|
|
// 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.
|
|
//
|
|
// Contact info:
|
|
// Jan.Wassenberg@stud.uni-karlsruhe.de
|
|
// http://www.stud.uni-karlsruhe.de/~urkt/
|
|
|
|
#ifndef IA32_H
|
|
#define IA32_H
|
|
|
|
#if !CPU_IA32
|
|
#error "including ia32.h without CPU_IA32=1"
|
|
#endif
|
|
|
|
#include "lib/types.h"
|
|
|
|
// some of these are implemented in asm, so make sure name mangling is
|
|
// disabled.
|
|
#ifdef __cplusplus
|
|
extern "C" {
|
|
#endif
|
|
|
|
|
|
// call before any of the following functions
|
|
extern void ia32_init();
|
|
|
|
|
|
//
|
|
// fast implementations of some sysdep.h functions; see documentation there
|
|
//
|
|
|
|
extern float ia32_rintf(float f);
|
|
extern double ia32_rint(double f);
|
|
|
|
extern i32 ia32_i32_from_float(float f);
|
|
extern i32 ia32_i32_from_double(double d);
|
|
extern i64 ia32_i64_from_double(double d);
|
|
|
|
extern void* ia32_memcpy(void* dst, const void* src, size_t nbytes); // asm
|
|
|
|
|
|
// FPU control word
|
|
// .. Precision Control:
|
|
#define IA32_MCW_PC 0x0300
|
|
#define IA32_PC_24 0x0000
|
|
// .. Rounding Control:
|
|
#define IA32_MCW_RC 0x0C00
|
|
#define IA32_RC_NEAR 0x0000
|
|
#define IA32_RC_DOWN 0x0400
|
|
#define IA32_RC_UP 0x0800
|
|
#define IA32_RC_CHOP 0x0C00
|
|
// .. Exception Mask:
|
|
#define IA32_MCW_EM 0x003f
|
|
#define IA32_EM_INVALID BIT(0)
|
|
#define IA32_EM_DENORMAL BIT(1)
|
|
#define IA32_EM_ZERODIVIDE BIT(2)
|
|
#define IA32_EM_OVERFLOW BIT(3)
|
|
#define IA32_EM_UNDERFLOW BIT(4)
|
|
#define IA32_EM_INEXACT BIT(5)
|
|
|
|
extern uint ia32_control87(uint new_val, uint mask); // asm
|
|
|
|
|
|
extern u64 rdtsc(void);
|
|
|
|
extern void ia32_debug_break(void);
|
|
|
|
|
|
// CPU caps (128 bits)
|
|
// do not change the order!
|
|
enum CpuCap
|
|
{
|
|
// standard (ecx) - currently only defined by Intel
|
|
SSE3 = 0+0, // Streaming SIMD Extensions 3
|
|
EST = 0+7, // Enhanced Speedstep Technology
|
|
|
|
// standard (edx)
|
|
TSC = 32+4, // TimeStamp Counter
|
|
CMOV = 32+15, // Conditional MOVe
|
|
MMX = 32+23, // MultiMedia eXtensions
|
|
SSE = 32+25, // Streaming SIMD Extensions
|
|
SSE2 = 32+26, // Streaming SIMD Extensions 2
|
|
HT = 32+28, // HyperThreading
|
|
|
|
// extended (ecx)
|
|
|
|
// extended (edx) - currently only defined by AMD
|
|
AMD_MP = 96+19, // MultiProcessing capable; reserved on AMD64
|
|
AMD_3DNOW_PRO = 96+30,
|
|
AMD_3DNOW = 96+31
|
|
};
|
|
|
|
extern bool ia32_cap(CpuCap cap);
|
|
|
|
|
|
extern void ia32_get_cpu_info(void);
|
|
extern void ia32_hook_capabilities(void);
|
|
|
|
|
|
//-----------------------------------------------------------------------------
|
|
// internal use only
|
|
|
|
// write the current execution state (e.g. all register values) into
|
|
// (Win32::CONTEXT*)pcontext (defined as void* to avoid dependency).
|
|
extern void ia32_get_current_context(void* pcontext);
|
|
|
|
extern int ia32_get_call_target(void* ret_addr, void** target);
|
|
|
|
// order in which registers are stored in regs array
|
|
// (do not change! brand string relies on this ordering)
|
|
enum IA32Regs
|
|
{
|
|
EAX,
|
|
EBX,
|
|
ECX,
|
|
EDX
|
|
};
|
|
|
|
// try to call the specified CPUID sub-function. returns true on success or
|
|
// false on failure (i.e. CPUID or the specific function not supported).
|
|
// returns eax, ebx, ecx, edx registers in above order.
|
|
extern bool ia32_cpuid(u32 func, u32* regs);
|
|
|
|
#ifdef __cplusplus
|
|
}
|
|
#endif
|
|
|
|
#endif // #ifndef IA32_H
|