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comparison foosdk/sdk/pfc/fpu.h @ 1:20d02a178406 default tip

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author Paper <paper@tflc.us>
date Mon, 05 Jan 2026 02:15:46 -0500
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0:e9bb126753e7 1:20d02a178406
1 #pragma once
2
3 #ifdef _MSC_VER
4
5 class fpu_control
6 {
7 unsigned old_val;
8 unsigned mask;
9 public:
10 inline fpu_control(unsigned p_mask,unsigned p_val)
11 {
12 mask = p_mask;
13 _controlfp_s(&old_val,p_val,mask);
14 }
15 inline ~fpu_control()
16 {
17 unsigned dummy;
18 _controlfp_s(&dummy,old_val,mask);
19 }
20 };
21
22 class fpu_control_roundnearest : private fpu_control
23 {
24 public:
25 fpu_control_roundnearest() : fpu_control(_MCW_RC,_RC_NEAR) {}
26 };
27
28 class fpu_control_flushdenormal : private fpu_control
29 {
30 public:
31 fpu_control_flushdenormal() : fpu_control(_MCW_DN,_DN_FLUSH) {}
32 };
33
34 class fpu_control_default : private fpu_control
35 {
36 public:
37 fpu_control_default() : fpu_control(_MCW_DN|_MCW_RC,_DN_FLUSH|_RC_NEAR) {}
38 };
39
40 #ifdef _M_IX86
41 class sse_control {
42 public:
43 sse_control(unsigned p_mask,unsigned p_val) : m_mask(p_mask) {
44 __control87_2(p_val,p_mask,NULL,&m_oldval);
45 }
46 ~sse_control() {
47 __control87_2(m_oldval,m_mask,NULL,&m_oldval);
48 }
49 private:
50 unsigned m_mask,m_oldval;
51 };
52 class sse_control_flushdenormal : private sse_control {
53 public:
54 sse_control_flushdenormal() : sse_control(_MCW_DN,_DN_FLUSH) {}
55 };
56 #endif
57
58 #endif