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GET /api/1.2/patches/2234618/?format=api
{ "id": 2234618, "url": "http://patchwork.ozlabs.org/api/1.2/patches/2234618/?format=api", "web_url": "http://patchwork.ozlabs.org/project/qemu-devel/patch/20260507221717.486023-19-richard.henderson@linaro.org/", "project": { "id": 14, "url": "http://patchwork.ozlabs.org/api/1.2/projects/14/?format=api", "name": "QEMU Development", "link_name": "qemu-devel", "list_id": "qemu-devel.nongnu.org", "list_email": "qemu-devel@nongnu.org", "web_url": "", "scm_url": "", "webscm_url": "", "list_archive_url": "", "list_archive_url_format": "", "commit_url_format": "" }, "msgid": "<20260507221717.486023-19-richard.henderson@linaro.org>", "list_archive_url": null, "date": "2026-05-07T22:17:17", "name": "[18/18] fpu: Reorg float_status", "commit_ref": null, "pull_url": null, "state": "new", "archived": false, "hash": "17e7d4d89d969f6889b3fc6950e2283333b7863c", "submitter": { "id": 72104, "url": "http://patchwork.ozlabs.org/api/1.2/people/72104/?format=api", "name": "Richard Henderson", "email": "richard.henderson@linaro.org" }, "delegate": null, "mbox": "http://patchwork.ozlabs.org/project/qemu-devel/patch/20260507221717.486023-19-richard.henderson@linaro.org/mbox/", "series": [ { "id": 503289, "url": "http://patchwork.ozlabs.org/api/1.2/series/503289/?format=api", "web_url": "http://patchwork.ozlabs.org/project/qemu-devel/list/?series=503289", "date": "2026-05-07T22:16:59", "name": "fpu: Compress float_status", "version": 1, "mbox": "http://patchwork.ozlabs.org/series/503289/mbox/" } ], "comments": "http://patchwork.ozlabs.org/api/patches/2234618/comments/", "check": "pending", "checks": "http://patchwork.ozlabs.org/api/patches/2234618/checks/", "tags": {}, "related": [], "headers": { "Return-Path": "<qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org>", "X-Original-To": "incoming@patchwork.ozlabs.org", "Delivered-To": "patchwork-incoming@legolas.ozlabs.org", "Authentication-Results": [ "legolas.ozlabs.org;\n\tdkim=pass (2048-bit key;\n unprotected) header.d=linaro.org header.i=@linaro.org header.a=rsa-sha256\n header.s=google header.b=i74wCC1r;\n\tdkim-atps=neutral", "legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=nongnu.org\n (client-ip=209.51.188.17; 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helo=mail-oo1-xc30.google.com", "X-Spam_score_int": "-20", "X-Spam_score": "-2.1", "X-Spam_bar": "--", "X-Spam_report": "(-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1,\n DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1,\n RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001,\n SPF_PASS=-0.001 autolearn=ham autolearn_force=no", "X-Spam_action": "no action", "X-BeenThere": "qemu-devel@nongnu.org", "X-Mailman-Version": "2.1.29", "Precedence": "list", "List-Id": "qemu development <qemu-devel.nongnu.org>", "List-Unsubscribe": "<https://lists.nongnu.org/mailman/options/qemu-devel>,\n <mailto:qemu-devel-request@nongnu.org?subject=unsubscribe>", "List-Archive": "<https://lists.nongnu.org/archive/html/qemu-devel>", "List-Post": "<mailto:qemu-devel@nongnu.org>", "List-Help": "<mailto:qemu-devel-request@nongnu.org?subject=help>", "List-Subscribe": "<https://lists.nongnu.org/mailman/listinfo/qemu-devel>,\n <mailto:qemu-devel-request@nongnu.org?subject=subscribe>", "Errors-To": "qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org", "Sender": "qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org" }, "content": "Use bitfields to compress float_status from 18 bytes down to 8 bytes.\n\nSigned-off-by: Richard Henderson <richard.henderson@linaro.org>\n---\n include/fpu/softfloat-types.h | 53 ++++++++++++++++++++++-------------\n 1 file changed, 33 insertions(+), 20 deletions(-)", "diff": "diff --git a/include/fpu/softfloat-types.h b/include/fpu/softfloat-types.h\nindex b83f67defc..d77f48f6b0 100644\n--- a/include/fpu/softfloat-types.h\n+++ b/include/fpu/softfloat-types.h\n@@ -327,7 +327,7 @@ typedef enum __attribute__((__packed__)) {\n * This is a flag which can be ORed in with any of the above\n * DNaN behaviour options.\n */\n- float_infzeronan_suppress_invalid = (1 << 7),\n+ float_infzeronan_suppress_invalid = (1 << 2),\n } FloatInfZeroNaNRule;\n \n /*\n@@ -402,22 +402,39 @@ typedef enum __attribute__((__packed__)) {\n */\n \n typedef struct float_status {\n- FloatExceptionFlags float_exception_flags;\n- FloatRoundMode float_rounding_mode;\n- FloatX80RoundPrec floatx80_rounding_precision;\n- FloatX80Behaviour floatx80_behaviour;\n- Float2NaNPropRule float_2nan_prop_rule;\n- Float3NaNPropRule float_3nan_prop_rule;\n- FloatInfZeroNaNRule float_infzeronan_rule;\n- FloatSNaNRule float_snan_rule;\n- bool tininess_before_rounding;\n+ FloatExceptionFlags float_exception_flags : 16;\n+\n+ /*\n+ * Floating point status controls.\n+ * Items that, in general, may be updated by writes to an architectural\n+ * floating point control register.\n+ */\n+ FloatRoundMode float_rounding_mode : 3;\n+ FloatX80RoundPrec floatx80_rounding_precision : 2;\n /* should denormalised results go to zero and set output_denormal_flushed? */\n- bool flush_to_zero;\n- /* do we detect and flush denormal results before or after rounding? */\n- bool ftz_before_rounding;\n+ bool flush_to_zero : 1;\n /* should denormalised inputs go to zero and set input_denormal_flushed? */\n- bool flush_inputs_to_zero;\n- bool default_nan_mode;\n+ bool flush_inputs_to_zero : 1;\n+ /* should default nans be produced instead of propagating an input nan? */\n+ bool default_nan_mode : 1;\n+ /* should overflowed results subtract re_bias to its exponent? */\n+ bool rebias_overflow : 1;\n+ /* should underflowed results add re_bias to its exponent? */\n+ bool rebias_underflow : 1;\n+\n+ /*\n+ * Floating point behaviour controls.\n+ * Items that, in general, will be set at cpu realization because\n+ * the behaviour is baked into the specific hardware implementation.\n+ */\n+ bool tininess_before_rounding : 1;\n+ /* do we detect and flush denormal results before or after rounding? */\n+ bool ftz_before_rounding : 1;\n+ FloatSNaNRule float_snan_rule : 2;\n+ Float2NaNPropRule float_2nan_prop_rule : 3;\n+ Float3NaNPropRule float_3nan_prop_rule : 7;\n+ FloatInfZeroNaNRule float_infzeronan_rule: 3;\n+ FloatX80Behaviour floatx80_behaviour : 5;\n /*\n * The pattern to use for the default NaN. Here the high bit specifies\n * the default NaN's sign bit, and bits 6..0 specify the high bits of the\n@@ -427,11 +444,7 @@ typedef struct float_status {\n * this to the correct non-zero value, or we will assert when trying to\n * create a default NaN.\n */\n- uint8_t default_nan_pattern;\n- /* should overflowed results subtract re_bias to its exponent? */\n- bool rebias_overflow;\n- /* should underflowed results add re_bias to its exponent? */\n- bool rebias_underflow;\n+ unsigned default_nan_pattern : 8;\n } float_status;\n \n #endif /* SOFTFLOAT_TYPES_H */\n", "prefixes": [ "18/18" ] }