d36c231f4b
This change corrects rounding and saturation of Q31 fractional value in mipsdsp_trunc16_sat16_round(). Overflow detection was incorrect for the corner case for PRECRQ_RS.PH, and this test case is also part of the change. Signed-off-by: Petar Jovanovic <petar.jovanovic@imgtec.com> Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
52 lines
952 B
C
52 lines
952 B
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 rd, rs, rt;
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int dsp;
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int result;
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rs = 0x12345678;
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rt = 0x87654321;
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result = 0x12348765;
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__asm
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("wrdsp $0\n\t"
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"precrq_rs.ph.w %0, %1, %2\n\t"
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: "=r"(rd)
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: "r"(rs), "r"(rt)
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);
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assert(result == rd);
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rs = 0x7FFFC678;
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rt = 0x865432A0;
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result = 0x7FFF8654;
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__asm
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("wrdsp $0\n\t"
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"precrq_rs.ph.w %0, %2, %3\n\t"
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"rddsp %1\n\t"
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: "=r"(rd), "=r"(dsp)
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: "r"(rs), "r"(rt)
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);
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assert(((dsp >> 22) & 0x01) == 1);
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assert(result == rd);
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rs = 0xBEEFFEED;
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rt = 0x7FFF8000;
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result = 0xBEF07FFF;
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__asm
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("wrdsp $0\n\t"
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"precrq_rs.ph.w %0, %2, %3\n\t"
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"rddsp %1\n\t"
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: "=r"(rd), "=r"(dsp)
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: "r"(rs), "r"(rt)
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);
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assert(((dsp >> 22) & 0x01) == 1);
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assert(result == rd);
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return 0;
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}
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