arti
7cd9a48ee3
Add a runtime marker test for 32x32 multiply, the 16x16 MPYU path, signed and unsigned divide/remainder, and for sumto/squares compiled through the ordinary tms-clang -O2 driver. The linked assembly is also checked for MPYS/MPYU/ DIVS/DIVU and for a surviving sumto loop.
31 lines
773 B
C
31 lines
773 B
C
/* m4 loop.c -- an ordinary -O2 loop test. The driver wrapper disables
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* IndVarSimplify's exit-value replacement (-replexitval=never): this target has
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* no i64, and the closed form of sumto turns into an i33 multiply that llc
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* cannot select. The loops themselves must survive and run.
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*
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* Markers (0x20 bits apart, written by loop_test):
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* 018A8100 sumto(10) == 55
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* 018A8120 squares(5) == 30
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*/
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#define MARK(n) (*(volatile unsigned int *)(0x018A8000u + (n)*0x20u))
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int sumto(int n) {
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int s = 0, i;
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for (i = 1; i <= n; i++)
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s += i;
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return s;
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}
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int squares(int n) {
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int s = 0, i;
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for (i = 0; i < n; i++)
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s += i * i;
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return s;
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}
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int loop_test(void) {
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MARK(8) = (unsigned)sumto(10);
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MARK(9) = (unsigned)squares(5);
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return 0;
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}
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