Collect the maximum error for fetch/unpack tests, and ratio of flipped to total bits for pack tests.
Add lenient thresholds for S3TC tests. --- progs/gallium/unit/u_format_test.c | 163 +++++++++++++++++++----------------- 1 files changed, 86 insertions(+), 77 deletions(-) diff --git a/progs/gallium/unit/u_format_test.c b/progs/gallium/unit/u_format_test.c index 53e0284..1911dad 100644 --- a/progs/gallium/unit/u_format_test.c +++ b/progs/gallium/unit/u_format_test.c @@ -36,22 +36,48 @@ #include "util/u_format_s3tc.h" +static float +float_error(float x, float y) +{ + return fabsf(y - x); +} + +static float +byte_error(uint8_t x, uint8_t y) +{ + return float_error(x / 255.0, y / 255.0); +} + +/* this is done in this terrible way only because these are unit tests. + * a real implementation must use a lookup table, or the mask/shift/add + * algorithm in the Linux source + * it should also use the builtin/intrinsic if available + */ +static unsigned +popcnt8(uint8_t v) +{ + unsigned i; + unsigned cnt = 0; + for(i = 0; i < 8; ++i) + cnt += ((v >> i) & 1); + return cnt; +} + static boolean -compare_float(float x, float y) +print_max_error(const struct util_format_description *format_desc, float max_error) { - float error = y - x; + if(max_error <= FLT_EPSILON) + return TRUE; - if (error < 0.0f) - error = -error; + printf("MAX ABS ERROR: %f float, %.1f 8scaled\n", max_error, max_error * 255.0); - if (error > FLT_EPSILON) { - return FALSE; - } + /* compression tests aren't currently perfect, so be lenient here */ + if(format_desc->layout == UTIL_FORMAT_LAYOUT_S3TC && max_error < 0.01f) + return TRUE; - return TRUE; + return FALSE; } - static void print_packed(const struct util_format_description *format_desc, const char *prefix, @@ -69,6 +95,31 @@ print_packed(const struct util_format_description *format_desc, printf("%s", suffix); } +static boolean +print_packed_results(const struct util_format_description *format_desc, const struct util_format_test_case *test, uint8_t* packed) +{ + unsigned flipped_bits = 0; + unsigned total_bits = 0; + float flipped_bits_ratio; + unsigned i; + for (i = 0; i < format_desc->block.bits/8; ++i) { + flipped_bits += popcnt8((test->packed[i] ^ packed[i]) & test->mask[i]); + total_bits += popcnt8(test->mask[i]); + } + + flipped_bits_ratio = (float)flipped_bits / total_bits; + + if (flipped_bits) + printf("FLIPPED BITS: %u (%u %%)\n", flipped_bits, (unsigned)(flipped_bits_ratio * 100.0)); + + /* TODO: S3TC threshold is random */ + if (flipped_bits_ratio > (format_desc->layout == UTIL_FORMAT_LAYOUT_S3TC ? 0.1 : 0)) { + print_packed(format_desc, "FAILED: ", packed, " obtained\n"); + print_packed(format_desc, " ", test->packed, " expected\n"); + return FALSE; + } + return TRUE; +} static void print_unpacked_doubl(const struct util_format_description *format_desc, @@ -94,7 +145,7 @@ print_unpacked_doubl(const struct util_format_description *format_desc, static void print_unpacked_float(const struct util_format_description *format_desc, const char *prefix, - const float unpacked[UTIL_FORMAT_MAX_UNPACKED_HEIGHT][UTIL_FORMAT_MAX_UNPACKED_WIDTH][4], + float unpacked[UTIL_FORMAT_MAX_UNPACKED_HEIGHT][UTIL_FORMAT_MAX_UNPACKED_WIDTH][4], const char *suffix) { unsigned i, j; @@ -115,7 +166,7 @@ print_unpacked_float(const struct util_format_description *format_desc, static void print_unpacked_8unorm(const struct util_format_description *format_desc, const char *prefix, - const uint8_t unpacked[][UTIL_FORMAT_MAX_UNPACKED_WIDTH][4], + uint8_t unpacked[][UTIL_FORMAT_MAX_UNPACKED_WIDTH][4], const char *suffix) { unsigned i, j; @@ -138,26 +189,23 @@ test_format_fetch_float(const struct util_format_description *format_desc, { float unpacked[UTIL_FORMAT_MAX_UNPACKED_HEIGHT][UTIL_FORMAT_MAX_UNPACKED_WIDTH][4] = { { { 0 } } }; unsigned i, j, k; - boolean success; + float max_error = 0.0f; - success = TRUE; for (i = 0; i < format_desc->block.height; ++i) { for (j = 0; j < format_desc->block.width; ++j) { format_desc->fetch_float(unpacked[i][j], test->packed, j, i); - for (k = 0; k < 4; ++k) { - if (!compare_float(test->unpacked[i][j][k], unpacked[i][j][k])) { - success = FALSE; - } - } + for (k = 0; k < 4; ++k) + max_error = MAX2(max_error, float_error(test->unpacked[i][j][k], unpacked[i][j][k])); } } - if (!success) { + if (!print_max_error(format_desc, max_error)) { print_unpacked_float(format_desc, "FAILED: ", unpacked, " obtained\n"); print_unpacked_doubl(format_desc, " ", test->unpacked, " expected\n"); + return FALSE; } - return success; + return TRUE; } @@ -167,27 +215,24 @@ test_format_unpack_float(const struct util_format_description *format_desc, { float unpacked[UTIL_FORMAT_MAX_UNPACKED_HEIGHT][UTIL_FORMAT_MAX_UNPACKED_WIDTH][4] = { { { 0 } } }; unsigned i, j, k; - boolean success; + float max_error = 0.0f; format_desc->unpack_float(&unpacked[0][0][0], sizeof unpacked[0], test->packed, 0, format_desc->block.width, format_desc->block.height); - success = TRUE; for (i = 0; i < format_desc->block.height; ++i) { for (j = 0; j < format_desc->block.width; ++j) { - for (k = 0; k < 4; ++k) { - if (!compare_float(test->unpacked[i][j][k], unpacked[i][j][k])) { - success = FALSE; - } - } + for (k = 0; k < 4; ++k) + max_error = MAX2(max_error, float_error(test->unpacked[i][j][k], unpacked[i][j][k])); } } - if (!success) { + if (!print_max_error(format_desc, max_error)) { print_unpacked_float(format_desc, "FAILED: ", unpacked, " obtained\n"); print_unpacked_doubl(format_desc, " ", test->unpacked, " expected\n"); + return FALSE; } - return success; + return TRUE; } @@ -199,16 +244,10 @@ test_format_pack_float(const struct util_format_description *format_desc, float unpacked[UTIL_FORMAT_MAX_UNPACKED_HEIGHT][UTIL_FORMAT_MAX_UNPACKED_WIDTH][4]; uint8_t packed[UTIL_FORMAT_MAX_PACKED_BYTES]; unsigned i, j, k; - boolean success; - if (test->format == PIPE_FORMAT_DXT1_RGBA) { - /* - * Skip S3TC as packed representation is not canonical. - * - * TODO: Do a round trip conversion. - */ + /* XXX: this test is broken */ + if (test->format == PIPE_FORMAT_DXT1_RGBA) return TRUE; - } memset(packed, 0, sizeof packed); for (i = 0; i < format_desc->block.height; ++i) { @@ -221,17 +260,7 @@ test_format_pack_float(const struct util_format_description *format_desc, format_desc->pack_float(packed, 0, &unpacked[0][0][0], sizeof unpacked[0], format_desc->block.width, format_desc->block.height); - success = TRUE; - for (i = 0; i < format_desc->block.bits/8; ++i) - if ((test->packed[i] & test->mask[i]) != (packed[i] & test->mask[i])) - success = FALSE; - - if (!success) { - print_packed(format_desc, "FAILED: ", packed, " obtained\n"); - print_packed(format_desc, " ", test->packed, " expected\n"); - } - - return success; + return print_packed_results(format_desc, test, packed); } @@ -266,29 +295,26 @@ test_format_unpack_8unorm(const struct util_format_description *format_desc, uint8_t unpacked[UTIL_FORMAT_MAX_UNPACKED_HEIGHT][UTIL_FORMAT_MAX_UNPACKED_WIDTH][4] = { { { 0 } } }; uint8_t expected[UTIL_FORMAT_MAX_UNPACKED_HEIGHT][UTIL_FORMAT_MAX_UNPACKED_WIDTH][4] = { { { 0 } } }; unsigned i, j, k; - boolean success; + float max_error; format_desc->unpack_8unorm(&unpacked[0][0][0], sizeof unpacked[0], test->packed, 0, 1, 1); convert_float_to_8unorm(&expected[0][0][0], &test->unpacked[0][0][0]); - success = TRUE; for (i = 0; i < format_desc->block.height; ++i) { for (j = 0; j < format_desc->block.width; ++j) { - for (k = 0; k < 4; ++k) { - if (expected[i][j][k] != unpacked[i][j][k]) { - success = FALSE; - } - } + for (k = 0; k < 4; ++k) + max_error = MAX2(max_error, byte_error(expected[i][j][k], unpacked[i][j][k])); } } - if (!success) { + if (!print_max_error(format_desc, max_error)) { print_unpacked_8unorm(format_desc, "FAILED: ", unpacked, " obtained\n"); print_unpacked_8unorm(format_desc, " ", expected, " expected\n"); + return FALSE; } - return success; + return TRUE; } @@ -298,17 +324,10 @@ test_format_pack_8unorm(const struct util_format_description *format_desc, { uint8_t unpacked[UTIL_FORMAT_MAX_UNPACKED_HEIGHT][UTIL_FORMAT_MAX_UNPACKED_WIDTH][4]; uint8_t packed[UTIL_FORMAT_MAX_PACKED_BYTES]; - unsigned i; - boolean success; - if (test->format == PIPE_FORMAT_DXT1_RGBA) { - /* - * Skip S3TC as packed representation is not canonical. - * - * TODO: Do a round trip conversion. - */ + /* XXX: this test is broken */ + if (test->format == PIPE_FORMAT_DXT1_RGBA) return TRUE; - } if (!convert_float_to_8unorm(&unpacked[0][0][0], &test->unpacked[0][0][0])) { /* @@ -321,17 +340,7 @@ test_format_pack_8unorm(const struct util_format_description *format_desc, format_desc->pack_8unorm(packed, 0, &unpacked[0][0][0], sizeof unpacked[0], 1, 1); - success = TRUE; - for (i = 0; i < format_desc->block.bits/8; ++i) - if ((test->packed[i] & test->mask[i]) != (packed[i] & test->mask[i])) - success = FALSE; - - if (!success) { - print_packed(format_desc, "FAILED: ", packed, " obtained\n"); - print_packed(format_desc, " ", test->packed, " expected\n"); - } - - return success; + return print_packed_results(format_desc, test, packed); } -- 1.7.0.1.147.g6d84b ------------------------------------------------------------------------------ Download Intel® Parallel Studio Eval Try the new software tools for yourself. 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