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29 lines
661 B
C
29 lines
661 B
C
/* https://stackoverflow.com/questions/53960240/armv8-floating-point-output-inline-assembly */
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#include <assert.h>
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int main(void) {
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float my_float = 1.5;
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__asm__ (
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"vmov s0, 1.0;"
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"vadd.f32 %[my_float], %[my_float], s0;"
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: [my_float] "+t" (my_float)
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:
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: "s0"
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);
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assert(my_float == 2.5);
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/* Undocumented %P
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* https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89482
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*/
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double my_double = 1.5;
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__asm__ (
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"vmov.f64 d0, 1.0;"
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"vadd.f64 %P[my_double], %P[my_double], d0;"
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: [my_double] "+w" (my_double)
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:
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: "d0"
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);
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assert(my_double == 2.5);
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}
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