derek.holloway
7502bf64a4
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67 lines
1.4 KiB
ArmAsm
67 lines
1.4 KiB
ArmAsm
// Test result extraction of mac instructions.
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// Test basic edge values
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// UNSIGNED FRACTIONAL mode into SINGLE destination register
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// test ops: "+="
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# mach: bfin
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.include "testutils.inc"
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start
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// load r0=0x80000001
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// load r1=0x80007fff
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// load r2=0xf000ffff
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// load r3=0x0000007f
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// load r4=0x00000080
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loadsym P0, data0;
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R0 = [ P0 ++ ];
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R1 = [ P0 ++ ];
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R2 = [ P0 ++ ];
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R3 = [ P0 ++ ];
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R4 = [ P0 ++ ];
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// extraction with no saturation (truncate)
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// 0x8000 * 0x7fff = 0x003fff8000 -> 0x3fff
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A1 = A0 = 0;
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R5.H = (A1 += R0.H * R1.L), R5.L = (A0 += R0.H * R1.L) (TFU);
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DBGA ( R5.L , 0x3fff );
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DBGA ( R5.H , 0x3fff );
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// extraction with no saturation (round)
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// 0x8000 * 0x7fff = 0x003fff8000 -> 0x4000
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A1 = A0 = 0;
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R5.H = (A1 += R0.H * R1.L), R5.L = (A0 += R0.H * R1.L) (FU);
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DBGA ( R5.L , 0x4000 );
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DBGA ( R5.H , 0x4000 );
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// extraction with no saturation
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// 0xffff * 0xffff = 0x00fffe0001 -> 0xfffe
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A1 = A0 = 0;
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R5.H = (A1 += R2.L * R2.L), R5.L = (A0 += R2.L * R2.L) (FU);
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DBGA ( R5.L , 0xfffe );
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DBGA ( R5.H , 0xfffe );
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// extraction with saturation
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//0x7ffffe0001 -> 0xffff
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A1 = A0 = 0;
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A1.x = R3.L;
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A0.x = R3.L;
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R5.H = (A1 += R2.L * R2.L), R5.L = (A0 += R2.L * R2.L) (FU);
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DBGA ( R5.L , 0xffff );
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DBGA ( R5.H , 0xffff );
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pass
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.data
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data0:
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.dw 0x0001
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.dw 0x8000
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.dw 0x7fff
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.dw 0x8000
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.dw 0xffff
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.dw 0xf000
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.dw 0x007f
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.dw 0x0000
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.dw 0x0080
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.dw 0x0000
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