From ee1720b99dfb5964962f2346406a4e3e88374a68 Mon Sep 17 00:00:00 2001 From: Roland Scheidegger Date: Tue, 8 Dec 2009 19:13:48 +0100 Subject: gallium: fix more potential strict aliasing issues In particular, gcc man page warns that union a_union { int i; double d; }; int f() { double d = 3.0; return ((union a_union *) &d)->i; } "might" not be ok (why not?), even though it doesn't seem to generate any warnings. Hence don't use this and do the extra step to actually use assignment to get the values in/out of the union. This changes parts of 3456f9149b3009fcfce80054759d05883d3c4ee5. --- src/gallium/state_trackers/vega/vg_translate.c | 190 ++++++++++++++++++------- 1 file changed, 136 insertions(+), 54 deletions(-) (limited to 'src/gallium/state_trackers/vega') diff --git a/src/gallium/state_trackers/vega/vg_translate.c b/src/gallium/state_trackers/vega/vg_translate.c index 5051d83831..03575ca3dd 100644 --- a/src/gallium/state_trackers/vega/vg_translate.c +++ b/src/gallium/state_trackers/vega/vg_translate.c @@ -474,6 +474,7 @@ void _vega_unpack_float_span_rgba(struct vg_context *ctx, VGfloat rgba[][4]) { VGint i; + union util_color uc; switch (dataFormat) { case VG_sRGBX_8888: { @@ -486,8 +487,11 @@ void _vega_unpack_float_span_rgba(struct vg_context *ctx, b = (*src >> 8) & 0xff; a = 0xff; - util_pack_color_ub(r, g, b, a, PIPE_FORMAT_R32G32B32A32_FLOAT, - (union util_color *)rgba[i]); + util_pack_color_ub(r, g, b, a, PIPE_FORMAT_R32G32B32A32_FLOAT, &uc); + rgba[i][0] = uc.f[0]; + rgba[i][1] = uc.f[1]; + rgba[i][2] = uc.f[2]; + rgba[i][3] = uc.f[3]; ++src; } } @@ -502,8 +506,11 @@ void _vega_unpack_float_span_rgba(struct vg_context *ctx, b = (*src >> 8) & 0xff; a = (*src >> 0) & 0xff; - util_pack_color_ub(r, g, b, a, PIPE_FORMAT_R32G32B32A32_FLOAT, - (union util_color *)rgba[i]); + util_pack_color_ub(r, g, b, a, PIPE_FORMAT_R32G32B32A32_FLOAT, &uc); + rgba[i][0] = uc.f[0]; + rgba[i][1] = uc.f[1]; + rgba[i][2] = uc.f[2]; + rgba[i][3] = uc.f[3]; ++src; } return; @@ -519,8 +526,11 @@ void _vega_unpack_float_span_rgba(struct vg_context *ctx, b = (*src >> 8) & 0xff; a = (*src >> 0) & 0xff; - util_pack_color_ub(r, g, b, a, PIPE_FORMAT_R32G32B32A32_FLOAT, - (union util_color *)rgba[i]); + util_pack_color_ub(r, g, b, a, PIPE_FORMAT_R32G32B32A32_FLOAT, &uc); + rgba[i][0] = uc.f[0]; + rgba[i][1] = uc.f[1]; + rgba[i][2] = uc.f[2]; + rgba[i][3] = uc.f[3]; ++src; } return; @@ -536,8 +546,11 @@ void _vega_unpack_float_span_rgba(struct vg_context *ctx, clr[2] = ((*src >> 0) & 31)/31.; clr[3] = 1.f; - util_pack_color(clr, PIPE_FORMAT_R32G32B32A32_FLOAT, - (union util_color *)rgba[i]); + util_pack_color(clr, PIPE_FORMAT_R32G32B32A32_FLOAT, &uc); + rgba[i][0] = uc.f[0]; + rgba[i][1] = uc.f[1]; + rgba[i][2] = uc.f[2]; + rgba[i][3] = uc.f[3]; ++src; } } @@ -552,8 +565,11 @@ void _vega_unpack_float_span_rgba(struct vg_context *ctx, clr[2] = ((*src >> 1) & 31)/31.; clr[3] = ((*src >> 0) & 1)/1.; - util_pack_color(clr, PIPE_FORMAT_R32G32B32A32_FLOAT, - (union util_color *)rgba[i]); + util_pack_color(clr, PIPE_FORMAT_R32G32B32A32_FLOAT, &uc); + rgba[i][0] = uc.f[0]; + rgba[i][1] = uc.f[1]; + rgba[i][2] = uc.f[2]; + rgba[i][3] = uc.f[3]; ++src; } } @@ -568,8 +584,11 @@ void _vega_unpack_float_span_rgba(struct vg_context *ctx, clr[2] = ((*src >> 4) & 15)/15.; clr[3] = ((*src >> 0) & 15)/15.; - util_pack_color(clr, PIPE_FORMAT_R32G32B32A32_FLOAT, - (union util_color *)rgba[i]); + util_pack_color(clr, PIPE_FORMAT_R32G32B32A32_FLOAT, &uc); + rgba[i][0] = uc.f[0]; + rgba[i][1] = uc.f[1]; + rgba[i][2] = uc.f[2]; + rgba[i][3] = uc.f[3]; ++src; } } @@ -578,8 +597,11 @@ void _vega_unpack_float_span_rgba(struct vg_context *ctx, VGubyte *src = (VGubyte *)data; src += offset; for (i = 0; i < n; ++i) { - util_pack_color_ub(0xff, 0xff, 0xff, *src, PIPE_FORMAT_R32G32B32A32_FLOAT, - (union util_color *)rgba[i]); + util_pack_color_ub(0xff, 0xff, 0xff, *src, PIPE_FORMAT_R32G32B32A32_FLOAT, &uc); + rgba[i][0] = uc.f[0]; + rgba[i][1] = uc.f[1]; + rgba[i][2] = uc.f[2]; + rgba[i][3] = uc.f[3]; ++src; } } @@ -594,8 +616,11 @@ void _vega_unpack_float_span_rgba(struct vg_context *ctx, b = (*src >> 8) & 0xff; a = 0xff; - util_pack_color_ub(r, g, b, a, PIPE_FORMAT_R32G32B32A32_FLOAT, - (union util_color *)rgba[i]); + util_pack_color_ub(r, g, b, a, PIPE_FORMAT_R32G32B32A32_FLOAT, &uc); + rgba[i][0] = uc.f[0]; + rgba[i][1] = uc.f[1]; + rgba[i][2] = uc.f[2]; + rgba[i][3] = uc.f[3]; ++src; } } @@ -610,8 +635,11 @@ void _vega_unpack_float_span_rgba(struct vg_context *ctx, b = (*src >> 8) & 0xff; a = (*src >> 0) & 0xff; - util_pack_color_ub(r, g, b, a, PIPE_FORMAT_R32G32B32A32_FLOAT, - (union util_color *)rgba[i]); + util_pack_color_ub(r, g, b, a, PIPE_FORMAT_R32G32B32A32_FLOAT, &uc); + rgba[i][0] = uc.f[0]; + rgba[i][1] = uc.f[1]; + rgba[i][2] = uc.f[2]; + rgba[i][3] = uc.f[3]; ++src; } return; @@ -627,8 +655,11 @@ void _vega_unpack_float_span_rgba(struct vg_context *ctx, b = (*src >> 8) & 0xff; a = (*src >> 0) & 0xff; - util_pack_color_ub(r, g, b, a, PIPE_FORMAT_R32G32B32A32_FLOAT, - (union util_color *)rgba[i]); + util_pack_color_ub(r, g, b, a, PIPE_FORMAT_R32G32B32A32_FLOAT, &uc); + rgba[i][0] = uc.f[0]; + rgba[i][1] = uc.f[1]; + rgba[i][2] = uc.f[2]; + rgba[i][3] = uc.f[3]; ++src; } return; @@ -638,8 +669,11 @@ void _vega_unpack_float_span_rgba(struct vg_context *ctx, VGubyte *src = (VGubyte *)data; src += offset; for (i = 0; i < n; ++i) { - util_pack_color_ub(0xff, 0xff, 0xff, *src, PIPE_FORMAT_R32G32B32A32_FLOAT, - (union util_color *)rgba[i]); + util_pack_color_ub(0xff, 0xff, 0xff, *src, PIPE_FORMAT_R32G32B32A32_FLOAT, &uc); + rgba[i][0] = uc.f[0]; + rgba[i][1] = uc.f[1]; + rgba[i][2] = uc.f[2]; + rgba[i][3] = uc.f[3]; ++src; } } @@ -648,8 +682,11 @@ void _vega_unpack_float_span_rgba(struct vg_context *ctx, VGubyte *src = (VGubyte *)data; src += offset; for (i = 0; i < n; ++i) { - util_pack_color_ub(0xff, 0xff, 0xff, *src, PIPE_FORMAT_R32G32B32A32_FLOAT, - (union util_color *)rgba[i]); + util_pack_color_ub(0xff, 0xff, 0xff, *src, PIPE_FORMAT_R32G32B32A32_FLOAT, &uc); + rgba[i][0] = uc.f[0]; + rgba[i][1] = uc.f[1]; + rgba[i][2] = uc.f[2]; + rgba[i][3] = uc.f[3]; ++src; } } @@ -667,8 +704,11 @@ void _vega_unpack_float_span_rgba(struct vg_context *ctx, clr[2] = clr[0]; clr[3] = 1.f; - util_pack_color(clr, PIPE_FORMAT_R32G32B32A32_FLOAT, - (union util_color *)rgba[i+j]); + util_pack_color(clr, PIPE_FORMAT_R32G32B32A32_FLOAT, &uc); + rgba[i+j][0] = uc.f[0]; + rgba[i+j][1] = uc.f[1]; + rgba[i+j][2] = uc.f[2]; + rgba[i+j][3] = uc.f[3]; } ++src; } @@ -688,8 +728,11 @@ void _vega_unpack_float_span_rgba(struct vg_context *ctx, clr[2] = 0.f; clr[3] = (((*src) & (1<> shift); - util_pack_color(clr, PIPE_FORMAT_R32G32B32A32_FLOAT, - (union util_color *)rgba[i+j]); + util_pack_color(clr, PIPE_FORMAT_R32G32B32A32_FLOAT, &uc); + rgba[i+j][0] = uc.f[0]; + rgba[i+j][1] = uc.f[1]; + rgba[i+j][2] = uc.f[2]; + rgba[i+j][3] = uc.f[3]; } ++src; } @@ -715,8 +758,11 @@ void _vega_unpack_float_span_rgba(struct vg_context *ctx, clr[2] = 0.f; clr[3] = ((*src) & (bitter)) >> shift; - util_pack_color(clr, PIPE_FORMAT_R32G32B32A32_FLOAT, - (union util_color *)rgba[i +j]); + util_pack_color(clr, PIPE_FORMAT_R32G32B32A32_FLOAT, &uc); + rgba[i+j][0] = uc.f[0]; + rgba[i+j][1] = uc.f[1]; + rgba[i+j][2] = uc.f[2]; + rgba[i+j][3] = uc.f[3]; } ++src; } @@ -735,8 +781,11 @@ void _vega_unpack_float_span_rgba(struct vg_context *ctx, g = (*src >> 8) & 0xff; b = (*src >> 0) & 0xff; - util_pack_color_ub(r, g, b, a, PIPE_FORMAT_R32G32B32A32_FLOAT, - (union util_color *)rgba[i]); + util_pack_color_ub(r, g, b, a, PIPE_FORMAT_R32G32B32A32_FLOAT, &uc); + rgba[i][0] = uc.f[0]; + rgba[i][1] = uc.f[1]; + rgba[i][2] = uc.f[2]; + rgba[i][3] = uc.f[3]; ++src; } return; @@ -752,8 +801,11 @@ void _vega_unpack_float_span_rgba(struct vg_context *ctx, g = (*src >> 8) & 0xff; b = (*src >> 0) & 0xff; - util_pack_color_ub(r, g, b, a, PIPE_FORMAT_R32G32B32A32_FLOAT, - (union util_color *)rgba[i]); + util_pack_color_ub(r, g, b, a, PIPE_FORMAT_R32G32B32A32_FLOAT, &uc); + rgba[i][0] = uc.f[0]; + rgba[i][1] = uc.f[1]; + rgba[i][2] = uc.f[2]; + rgba[i][3] = uc.f[3]; ++src; } return; @@ -775,8 +827,11 @@ void _vega_unpack_float_span_rgba(struct vg_context *ctx, g = (*src >> 8) & 0xff; b = (*src >> 0) & 0xff; - util_pack_color_ub(r, g, b, a, PIPE_FORMAT_R32G32B32A32_FLOAT, - (union util_color *)rgba[i]); + util_pack_color_ub(r, g, b, a, PIPE_FORMAT_R32G32B32A32_FLOAT, &uc); + rgba[i][0] = uc.f[0]; + rgba[i][1] = uc.f[1]; + rgba[i][2] = uc.f[2]; + rgba[i][3] = uc.f[3]; ++src; } return; @@ -792,8 +847,11 @@ void _vega_unpack_float_span_rgba(struct vg_context *ctx, g = (*src >> 8) & 0xff; b = (*src >> 0) & 0xff; - util_pack_color_ub(r, g, b, a, PIPE_FORMAT_R32G32B32A32_FLOAT, - (union util_color *)rgba[i]); + util_pack_color_ub(r, g, b, a, PIPE_FORMAT_R32G32B32A32_FLOAT, &uc); + rgba[i][0] = uc.f[0]; + rgba[i][1] = uc.f[1]; + rgba[i][2] = uc.f[2]; + rgba[i][3] = uc.f[3]; ++src; } return; @@ -811,8 +869,11 @@ void _vega_unpack_float_span_rgba(struct vg_context *ctx, r = (*src >> 8) & 0xff; a = (*src >> 0) & 0xff; - util_pack_color_ub(r, g, b, a, PIPE_FORMAT_R32G32B32A32_FLOAT, - (union util_color *)rgba[i]); + util_pack_color_ub(r, g, b, a, PIPE_FORMAT_R32G32B32A32_FLOAT, &uc); + rgba[i][0] = uc.f[0]; + rgba[i][1] = uc.f[1]; + rgba[i][2] = uc.f[2]; + rgba[i][3] = uc.f[3]; ++src; } return; @@ -828,8 +889,11 @@ void _vega_unpack_float_span_rgba(struct vg_context *ctx, r = (*src >> 8) & 0xff; a = (*src >> 0) & 0xff; - util_pack_color_ub(r, g, b, a, PIPE_FORMAT_R32G32B32A32_FLOAT, - (union util_color *)rgba[i]); + util_pack_color_ub(r, g, b, a, PIPE_FORMAT_R32G32B32A32_FLOAT, &uc); + rgba[i][0] = uc.f[0]; + rgba[i][1] = uc.f[1]; + rgba[i][2] = uc.f[2]; + rgba[i][3] = uc.f[3]; ++src; } return; @@ -853,8 +917,11 @@ void _vega_unpack_float_span_rgba(struct vg_context *ctx, r = (*src >> 8) & 0xff; a = (*src >> 0) & 0xff; - util_pack_color_ub(r, g, b, a, PIPE_FORMAT_R32G32B32A32_FLOAT, - (union util_color *)rgba[i]); + util_pack_color_ub(r, g, b, a, PIPE_FORMAT_R32G32B32A32_FLOAT, &uc); + rgba[i][0] = uc.f[0]; + rgba[i][1] = uc.f[1]; + rgba[i][2] = uc.f[2]; + rgba[i][3] = uc.f[3]; ++src; } return; @@ -870,8 +937,11 @@ void _vega_unpack_float_span_rgba(struct vg_context *ctx, r = (*src >> 8) & 0xff; a = (*src >> 0) & 0xff; - util_pack_color_ub(r, g, b, a, PIPE_FORMAT_R32G32B32A32_FLOAT, - (union util_color *)rgba[i]); + util_pack_color_ub(r, g, b, a, PIPE_FORMAT_R32G32B32A32_FLOAT, &uc); + rgba[i][0] = uc.f[0]; + rgba[i][1] = uc.f[1]; + rgba[i][2] = uc.f[2]; + rgba[i][3] = uc.f[3]; ++src; } return; @@ -889,8 +959,11 @@ void _vega_unpack_float_span_rgba(struct vg_context *ctx, g = (*src >> 8) & 0xff; r = (*src >> 0) & 0xff; - util_pack_color_ub(r, g, b, a, PIPE_FORMAT_R32G32B32A32_FLOAT, - (union util_color *)rgba[i]); + util_pack_color_ub(r, g, b, a, PIPE_FORMAT_R32G32B32A32_FLOAT, &uc); + rgba[i][0] = uc.f[0]; + rgba[i][1] = uc.f[1]; + rgba[i][2] = uc.f[2]; + rgba[i][3] = uc.f[3]; ++src; } return; @@ -906,8 +979,11 @@ void _vega_unpack_float_span_rgba(struct vg_context *ctx, g = (*src >> 8) & 0xff; r = (*src >> 0) & 0xff; - util_pack_color_ub(r, g, b, a, PIPE_FORMAT_R32G32B32A32_FLOAT, - (union util_color *)rgba[i]); + util_pack_color_ub(r, g, b, a, PIPE_FORMAT_R32G32B32A32_FLOAT, &uc); + rgba[i][0] = uc.f[0]; + rgba[i][1] = uc.f[1]; + rgba[i][2] = uc.f[2]; + rgba[i][3] = uc.f[3]; ++src; } return; @@ -929,8 +1005,11 @@ void _vega_unpack_float_span_rgba(struct vg_context *ctx, g = (*src >> 8) & 0xff; r = (*src >> 0) & 0xff; - util_pack_color_ub(r, g, b, a, PIPE_FORMAT_R32G32B32A32_FLOAT, - (union util_color *)rgba[i]); + util_pack_color_ub(r, g, b, a, PIPE_FORMAT_R32G32B32A32_FLOAT, &uc); + rgba[i][0] = uc.f[0]; + rgba[i][1] = uc.f[1]; + rgba[i][2] = uc.f[2]; + rgba[i][3] = uc.f[3]; ++src; } return; @@ -946,8 +1025,11 @@ void _vega_unpack_float_span_rgba(struct vg_context *ctx, g = (*src >> 8) & 0xff; r = (*src >> 0) & 0xff; - util_pack_color_ub(r, g, b, a, PIPE_FORMAT_R32G32B32A32_FLOAT, - (union util_color *)rgba[i]); + util_pack_color_ub(r, g, b, a, PIPE_FORMAT_R32G32B32A32_FLOAT, &uc); + rgba[i][0] = uc.f[0]; + rgba[i][1] = uc.f[1]; + rgba[i][2] = uc.f[2]; + rgba[i][3] = uc.f[3]; ++src; } return; -- cgit v1.2.3