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b8abbbe8df
The change removes some unnecessary and incorrect code for EXTR_S.H. Further, it corrects the mask for shift value in the EXTR_ instructions. It also extends the existing tests so they trigger the issues corrected with the change. Signed-off-by: Petar Jovanovic <petarj@mips.com> Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
87 lines
1.7 KiB
C
87 lines
1.7 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 rt, ach, acl, dsp;
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int result;
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ach = 0x05;
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acl = 0xB4CB;
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result = 0x00007FFF;
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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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"extr_s.h %0, $ac1, 0x03\n\t"
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"rddsp %1\n\t"
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: "=r"(rt), "=r"(dsp)
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: "r"(ach), "r"(acl)
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);
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dsp = (dsp >> 23) & 0x01;
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assert(dsp == 1);
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assert(result == rt);
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ach = 0xffffffff;
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acl = 0x12344321;
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result = 0xFFFF8000;
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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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"extr_s.h %0, $ac1, 0x08\n\t"
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"rddsp %1\n\t"
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: "=r"(rt), "=r"(dsp)
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: "r"(ach), "r"(acl)
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);
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dsp = (dsp >> 23) & 0x01;
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assert(dsp == 1);
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assert(result == rt);
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/* Clear dsp */
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dsp = 0;
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__asm
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("wrdsp %0\n\t"
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:
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: "r"(dsp)
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);
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ach = 0x00;
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acl = 0x4321;
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result = 0x432;
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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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"extr_s.h %0, $ac1, 0x04\n\t"
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"rddsp %1\n\t"
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: "=r"(rt), "=r"(dsp)
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: "r"(ach), "r"(acl)
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);
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dsp = (dsp >> 23) & 0x01;
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assert(dsp == 0);
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assert(result == rt);
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/* Clear dsp */
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dsp = 0;
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__asm
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("wrdsp %0\n\t"
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:
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: "r"(dsp)
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);
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ach = 0x123;
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acl = 0x87654321;
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result = 0x1238;
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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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"extr_s.h %0, $ac1, 28\n\t"
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"rddsp %1\n\t"
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: "=r"(rt), "=r"(dsp)
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: "r"(ach), "r"(acl)
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);
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dsp = (dsp >> 23) & 0x01;
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assert(dsp == 0);
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assert(result == rt);
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return 0;
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}
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