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21 lines
800 B
C
21 lines
800 B
C
// SPDX-License-Identifier: Apache-2.0
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// Tactility forces Newlib (see device.py) instead of ESP-IDF 6.x's Picolibc default, but
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// managed_components/espressif__esp_ipa's prebuilt libesp_ipa.a (camera ISP auto-white-balance,
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// linked in for boards with a camera sensor node, e.g. m5stack-tab5) was built against Picolibc
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// and references its __issignalingf(), which Newlib doesn't provide.
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#include <sdkconfig.h>
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#if CONFIG_IDF_TARGET_ESP32P4
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#include <stdint.h>
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int __issignalingf(float x) {
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union { float f; uint32_t i; } u = { .f = x };
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if (((u.i >> 23) & 0xff) != 0xff) {
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return 0; // not NaN or Inf
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}
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// NaN with mantissa MSB clear is signaling; MSB set is quiet.
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return (u.i & 0x007fffff) != 0 && (u.i & 0x00400000) == 0;
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}
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#endif // CONFIG_IDF_TARGET_ESP32P4
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