38 lines
1.1 KiB
C
38 lines
1.1 KiB
C
/* DN(X) generates 2**N copies of asm instruction X. */
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#define D0(X) X
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#define D1(X) X "\n\t" X
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#define D2(X) D1 (D1 (X))
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#define D3(X) D2 (D1 (X))
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#define D4(X) D2 (D2 (X))
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#define D5(X) D4 (D1 (X))
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#define D6(X) D4 (D2 (X))
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#define D7(X) D4 (D2 (D1 (X)))
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#define D8(X) D4 (D4 (X))
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#define D9(X) D8 (D1 (X))
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#define D10(X) D8 (D2 (X))
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#define D11(X) D8 (D2 (D1 (X)))
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#define D12(X) D8 (D4 (X))
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#define D13(X) D8 (D4 (D1 (X)))
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#define D14(X) D8 (D4 (D2 (X)))
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/* Emit something that is 0x1fff8 bytes long, which is the largest
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permissible range for non-MIPS16 forward branches. */
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#define OCCUPY_0x1fff8 \
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asm (D14 ("nop") "\n\t" \
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D13 ("nop") "\n\t" \
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D12 ("nop") "\n\t" \
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D11 ("nop") "\n\t" \
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D10 ("nop") "\n\t" \
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D9 ("nop") "\n\t" \
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D8 ("nop") "\n\t" \
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D7 ("nop") "\n\t" \
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D6 ("nop") "\n\t" \
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D5 ("nop") "\n\t" \
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D4 ("nop") "\n\t" \
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D3 ("nop") "\n\t" \
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D2 ("nop") "\n\t" \
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D1 ("nop"))
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/* Likewise emit something that is 0x1fffc bytes long. */
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#define OCCUPY_0x1fffc do { asm ("nop"); OCCUPY_0x1fff8; } while (0)
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