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1//===----------------------Hexagon builtin routine ------------------------===//2//3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.4// See https://llvm.org/LICENSE.txt for license information.5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception6//7//===----------------------------------------------------------------------===//8 9#define A r1:010#define B r3:211#define ATMP r5:412 13 14#define Q6_ALIAS(TAG) .global __qdsp_##TAG ; .set __qdsp_##TAG, __hexagon_##TAG15#define END(TAG) .size TAG,.-TAG16 17// Min and Max return A if B is NaN, or B if A is NaN18// Otherwise, they return the smaller or bigger value19//20// If values are equal, we want to favor -0.0 for min and +0.0 for max.21 22// Compares always return false for NaN23// if (isnan(A)) A = B; if (A > B) A = B will only trigger at most one of those options.24 25 .text26 .global __hexagon_mindf327 .global __hexagon_maxdf328 .global fmin29 .type fmin,@function30 .global fmax31 .type fmax,@function32 .type __hexagon_mindf3,@function33 .type __hexagon_maxdf3,@function34 Q6_ALIAS(mindf3)35 Q6_ALIAS(maxdf3)36 .p2align 537__hexagon_mindf3:38fmin:39 {40 p0 = dfclass(A,#0x10) // If A is a number41 p1 = dfcmp.gt(A,B) // AND B > A, don't swap42 ATMP = A43 }44 {45 if (p0) A = B // if A is NaN use B46 if (p1) A = B // gt is always false if either is NaN47 p2 = dfcmp.eq(A,B) // if A == B48 if (!p2.new) jumpr:t r3149 }50 // A == B, return A|B to select -0.0 over 0.051 {52 A = or(ATMP,B)53 jumpr r3154 }55END(__hexagon_mindf3)56 .falign57__hexagon_maxdf3:58fmax:59 {60 p0 = dfclass(A,#0x10)61 p1 = dfcmp.gt(B,A)62 ATMP = A63 }64 {65 if (p0) A = B66 if (p1) A = B67 p2 = dfcmp.eq(A,B)68 if (!p2.new) jumpr:t r3169 }70 // A == B, return A&B to select 0.0 over -0.071 {72 A = and(ATMP,B)73 jumpr r3174 }75END(__hexagon_maxdf3)76