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Add macros for reading and writing from xc pointers without indexing as there are no immediate formats for that.

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This commit is contained in:
Russell Gallop
2011-08-17 16:31:54 +01:00
parent b821b92041
commit d67788ab83
1 changed files with 4 additions and 0 deletions
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4
module_usb_aud_shared/usb_buffer/xc_ptr.h
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@@ -13,11 +13,15 @@ inline xc_ptr array_to_xc_ptr(unsigned a[]) {
#define write_via_xc_ptr_indexed(p,i,x) asm("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))
// No immediate st8 format
#define write_byte_via_xc_ptr(p,x) write_byte_via_xc_ptr_indexed(p, 0, x)
#define read_via_xc_ptr(x,p) asm("ldw %0, %1[0]":"=r"(x):"r"(p));
#define read_via_xc_ptr_indexed(x,p,i) asm("ldw %0, %1[%2]":"=r"(x):"r"(p),"r"(i));
#define read_byte_via_xc_ptr_indexed(x,p,i) asm("ld8u %0, %1[%2]":"=r"(x):"r"(p),"r"(i));
// No immediate ld8u format
#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 SET_SHARED_GLOBAL(g, v) asm("stw %0, dp[" #g "]"::"r"(v))