47 lines
1.1 KiB
C
47 lines
1.1 KiB
C
#include<stdio.h>
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#include<assert.h>
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int main()
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{
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int dsp_i, dsp_o;
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int ccond_i, outflag_i, efi_i, c_i, scount_i, pos_i;
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int ccond_o, outflag_o, efi_o, c_o, scount_o, pos_o;
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ccond_i = 0x0000000C; /* 4 */
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outflag_i = 0x0000001B; /* 3 */
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efi_i = 0x00000001; /* 5 */
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c_i = 0x00000001; /* 2 */
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scount_i = 0x0000000F; /* 1 */
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pos_i = 0x0000000C; /* 0 */
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dsp_i = (ccond_i << 24) | \
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(outflag_i << 16) | \
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(efi_i << 14) | \
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(c_i << 13) | \
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(scount_i << 7) | \
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pos_i;
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__asm
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("wrdsp %1, 0x3F\n\t"
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"rddsp %0, 0x3F\n\t"
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: "=r"(dsp_o)
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: "r"(dsp_i)
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);
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ccond_o = (dsp_o >> 24) & 0xFF;
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outflag_o = (dsp_o >> 16) & 0xFF;
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efi_o = (dsp_o >> 14) & 0x01;
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c_o = (dsp_o >> 14) & 0x01;
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scount_o = (dsp_o >> 7) & 0x3F;
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pos_o = dsp_o & 0x1F;
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assert(ccond_o == ccond_i);
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assert(outflag_o == outflag_i);
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assert(efi_o == efi_i);
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assert(c_o == c_i);
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assert(scount_o == scount_i);
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assert(pos_o == pos_i);
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return 0;
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}
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