Shift Right Algebraic Word Immediate

int SRAWI(int RS, int SH)
{
    // n <- SH
    int n = SH;
    // r <- ROTL32((RS)32:63, 64-n)
    int r = (RS << (32-n))|(RS >> (32 - (32-n)));
    // m <- MASK(n+32, 63)
    u32 m = GenerateMask32(n, 31);
    // s <- (RS)32
    // if bit 0 == 1 fill s with all 1's
    // else s is all 0's
    u32 s = ((RS & 0x80000000) == 0x80000000) ? -1:0;
    // RA <- r&m | s&~m
    int RA = r&m | s&~m;
    return RA;
}