[Libre-soc-bugs] [Bug 980] Implement C-based Power ISA pseudocode compiler

[bugzilla-daemon at libre-soc.org]

https://bugs.libre-soc.org/show_bug.cgi?id=980

Jacob Lifshay <programmerjake at gmail.com> changed:

           What    |Removed                     |Added
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                 CC|                            |programmerjake at gmail.com

--- Comment #3 from Jacob Lifshay <programmerjake at gmail.com> ---
i recommend using memcpy instead of *(uint16_t)addr, since it avoids C language
UB and generally gets compiled to a single load/store, not a function call:
https://gcc.godbolt.org/z/sj9o1novn

#include <stdint.h>
#include <string.h>

uint16_t load(uint8_t *mem, uint64_t EA) {
    uint16_t retval;
    memcpy(&retval, &mem[EA], 2);
    return retval;
}

load:                                   # @load
        lhzx 3, 3, 4
        blr
        .long   0
        .quad   0

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