mirror of https://gitee.com/openkylin/qemu.git
74 lines
1.4 KiB
C
74 lines
1.4 KiB
C
#include "io.h"
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int main(void)
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{
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long long rt, dsp;
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long long achi, acli;
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long long res, resdsp;
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achi = 0x87654321;
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acli = 0x12345678;
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res = 0xffffffffffff8000;
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resdsp = 0x1;
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__asm
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("mthi %2, $ac1\n\t"
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"mtlo %3, $ac1\n\t"
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"dextr_s.h %0, $ac1, 0x8\n\t"
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"rddsp %1\n\t"
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: "=r"(rt), "=r"(dsp)
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: "r"(achi), "r"(acli)
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);
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dsp = (dsp >> 23) & 0x1;
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if ((dsp != resdsp) || (rt != res)) {
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printf("1 dextr_s.h error\n");
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return -1;
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}
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achi = 0x77654321;
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acli = 0x12345678;
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res = 0x7fff;
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resdsp = 0x1;
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__asm
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("mthi %2, $ac1\n\t"
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"mtlo %3, $ac1\n\t"
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"dextr_s.h %0, $ac1, 0x8\n\t"
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"rddsp %1\n\t"
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: "=r"(rt), "=r"(dsp)
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: "r"(achi), "r"(acli)
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);
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dsp = (dsp >> 23) & 0x1;
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if ((dsp != resdsp) || (rt != res)) {
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printf("2 dextr_s.h error\n");
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return -1;
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}
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achi = 0x00;
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acli = 0x78;
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res = 0x7;
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resdsp = 0x1;
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__asm
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("mthi %2, $ac1\n\t"
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"mtlo %3, $ac1\n\t"
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"dextr_s.h %0, $ac1, 0x4\n\t"
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"rddsp %1\n\t"
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: "=r"(rt), "=r"(dsp)
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: "r"(achi), "r"(acli)
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);
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dsp = (dsp >> 23) & 0x1;
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if ((dsp != resdsp) || (rt != res)) {
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printf("3 dextr_s.h error\n");
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return -1;
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}
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return 0;
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}
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