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SHARED_GLOBAL now marked volatile and has memory clobber for safety

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This commit is contained in:
Ross Owen
2013-09-11 12:05:25 +01:00
parent c17db023ce
commit 3d8193af40
1 changed files with 9 additions and 9 deletions
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10
module_usb_audio/usb_buffer/xc_ptr.h
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@@ -14,10 +14,10 @@ inline xc_ptr array_to_xc_ptr(const unsigned a[])
return x; return x;
} }
#define write_via_xc_ptr(p,x) asm("stw %0, %1[0]"::"r"(x),"r"(p)) #define write_via_xc_ptr(p,x) asm volatile("stw %0, %1[0]"::"r"(x),"r"(p))
#define write_via_xc_ptr_indexed(p,i,x) asm("stw %0, %1[%2]"::"r"(x),"r"(p),"r"(i)) #define write_via_xc_ptr_indexed(p,i,x) asm volatile("stw %0, %1[%2]"::"r"(x),"r"(p),"r"(i))
#define write_byte_via_xc_ptr_indexed(p,i,x) asm("st8 %0, %1[%2]"::"r"(x),"r"(p),"r"(i)) #define write_byte_via_xc_ptr_indexed(p,i,x) asm volatile("st8 %0, %1[%2]"::"r"(x),"r"(p),"r"(i))
// No immediate st8 format // No immediate st8 format
#define write_byte_via_xc_ptr(p,x) write_byte_via_xc_ptr_indexed(p, 0, x) #define write_byte_via_xc_ptr(p,x) write_byte_via_xc_ptr_indexed(p, 0, x)
@@ -28,7 +28,7 @@ inline xc_ptr array_to_xc_ptr(const unsigned a[])
// No immediate ld8u format // No immediate ld8u format
#define read_byte_via_xc_ptr(x,p) read_byte_via_xc_ptr_indexed(x, p, 0) #define read_byte_via_xc_ptr(x,p) read_byte_via_xc_ptr_indexed(x, p, 0)
#define GET_SHARED_GLOBAL(x, g) asm("ldw %0, dp[" #g "]":"=r"(x)) #define GET_SHARED_GLOBAL(x, g) asm volatile("ldw %0, dp[" #g "]":"=r"(x)::"memory")
#define SET_SHARED_GLOBAL(g, v) asm("stw %0, dp[" #g "]"::"r"(v)) #define SET_SHARED_GLOBAL(g, v) asm volatile("stw %0, dp[" #g "]"::"r"(v):"memory")
#endif #endif