mirror of
https://github.com/nArnoSNES/tcc-65816.git
synced 2024-05-31 22:41:28 +00:00
60 lines
1.5 KiB
C
60 lines
1.5 KiB
C
/* PR target/7042. When reorg.c changed branches into return insns, it
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completely forgot about any current_function_epilogue_delay_list and
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dropped those insns. Uncovered on cris-axis-elf, where an insn in an
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epilogue delay-slot set the return-value register with the testcase
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below. Derived from ghostscript-6.52 (GPL) by hp@axis.com. */
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typedef struct font_hints_s {
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int axes_swapped;
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int x_inverted, y_inverted;
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} font_hints;
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typedef struct gs_fixed_point_s {
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long x, y;
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} gs_fixed_point;
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int
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line_hints(const font_hints *fh, const gs_fixed_point *p0,
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const gs_fixed_point *p1)
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{
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long dx = p1->x - p0->x;
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long dy = p1->y - p0->y;
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long adx, ady;
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int xi = fh->x_inverted, yi = fh->y_inverted;
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int hints;
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if (xi)
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dx = -dx;
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if (yi)
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dy = -dy;
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if (fh->axes_swapped) {
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long t = dx;
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int ti = xi;
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dx = dy, xi = yi;
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dy = t, yi = ti;
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}
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adx = dx < 0 ? -dx : dx;
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ady = dy < 0 ? -dy : dy;
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if (dy != 0 && (adx <= ady >> 4)) {
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hints = dy > 0 ? 2 : 1;
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if (xi)
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hints ^= 3;
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} else if (dx != 0 && (ady <= adx >> 4)) {
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hints = dx < 0 ? 8 : 4;
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if (yi)
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hints ^= 12;
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} else
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hints = 0;
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return hints;
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}
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int main ()
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{
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static font_hints fh[] = {{0, 1, 0}, {0, 0, 1}, {0, 0, 0}};
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static gs_fixed_point gsf[]
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= {{0x30000, 0x13958}, {0x30000, 0x18189},
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{0x13958, 0x30000}, {0x18189, 0x30000}};
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if (line_hints (fh, gsf, gsf + 1) != 1
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|| line_hints (fh + 1, gsf + 2, gsf + 3) != 8
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|| line_hints (fh + 2, gsf + 2, gsf + 3) != 4)
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abort ();
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exit (0);
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}
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