136 lines
2.2 KiB
C
136 lines
2.2 KiB
C
/* Copyright (C) 1998 Cygnus Solutions */
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/* COP2 function test, with non-expert inline assembly */
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/* globals */
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int num_ok = 0;
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int num_errors = 0;
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float data_array[128] __attribute__((aligned(16)));
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/* macros */
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#define TEST(x) do_test(x, #x, __LINE__)
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/* prototypes */
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void enable_cop2();
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void test00();
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void do_test(int ok, const char* test, int line);
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/* Utility functions */
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void
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enable_cop2()
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{
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asm volatile (".set noat");
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asm volatile ("mfc0 $1,$12; dli $2,0x40000000; or $1,$2,$2; mtc0 $1,$12"
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: /* no outputs */
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: /* no inputs */
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: "$1", "$2" /* clobbered */);
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asm volatile (".set at");
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}
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void
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do_test(int ok, const char* test, int line)
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{
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static int test_num = 0;
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printf("[%d @ %d] (%s): ", ++test_num, line, test);
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if(ok)
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{
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num_ok ++;
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printf("ok\n");
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}
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else
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{
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num_errors ++;
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printf("ko\n");
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}
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}
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/* Tests */
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/* test00: test LQC2/SQC2 data non-corruption */
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void test00()
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{
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volatile float* data = & data_array[0];
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volatile float* data2 = & data_array[4];
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/* stuff some initial values */
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data[0] = -10.0;
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data[1] = +10.0;
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data[2] = -20.0;
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data[3] = +20.0;
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/* save values */
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asm volatile ("lqc2 vf01,%0"
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: /* no output */
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: "m" (data[0]) /* input */
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: "memory" /* clobbered */);
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/* test no clobbering */
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TEST(data[0] == -10.0f);
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TEST(data[1] == +10.0f);
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TEST(data[2] == -20.0f);
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TEST(data[3] == +20.0f);
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/* overwrite with VU constants */
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asm volatile ("sqc2 vf00,%0"
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: /* no outputs */
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: "m" (data[0]) /* input */
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: "memory" /* clobbered */);
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/* test proper values */
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TEST(data[0] == 0.0f);
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TEST(data[1] == 0.5f);
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TEST(data[2] == -1.0f);
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TEST(data[3] == +1.0f);
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/* read back original array values */
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asm volatile ("sqc2 vf01,%0"
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: /* no outputs */
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: "m" (data2[0]) /* input */
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: "memory" /* clobbered */);
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/* printf("%f,%f,%f,%f\n", data2[0], data2[1], data2[2], data2[3]); */
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/* test proper values */
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TEST(data2[0] == -10.0f);
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TEST(data2[1] == +10.0f);
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TEST(data2[2] == -20.0f);
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TEST(data2[3] == +20.0f);
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}
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/* Mainline */
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int main()
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{
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enable_cop2();
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/* tests */
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test00();
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/* summarize */
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printf("%d ok, %d bad\n", num_ok, num_errors);
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if(num_errors > 0)
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exit(47);
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else
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exit(0);
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}
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