From: Srinivas Pokala <Pokala.Srinivas@ibm.com>
Date: Fri, 14 Nov 2025 13:21:37 +0000 (+0100)
Subject: math: switch s390x math.Pow to generic implementation
X-Git-Tag: go1.26rc1~243
X-Git-Url: http://www.git.cypherpunks.su/?a=commitdiff_plain;h=489d3dafb791df8297f71ecf4e2c3c84ea11f6f2;p=gostls13.git

math: switch s390x math.Pow to generic implementation

The s390x assembly implementation of math.Pow incorrectly handles
certain subnormal cases. This change switches the function to use the
generic implementation instead.

Updates #76247

Cq-Include-Trybots: luci.golang.try:gotip-linux-s390x
Change-Id: I794339080d5a7acf79bbffaeb0214809006fd30c
Reviewed-on: https://go-review.googlesource.com/c/go/+/720540
Reviewed-by: Vishwanatha HD <vishwanatha.hd@ibm.com>
Reviewed-by: Michael Pratt <mpratt@google.com>
Auto-Submit: Michael Pratt <mpratt@google.com>
Reviewed-by: Kiran M Vijay IBM <kiran.m.vijay@ibm.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Mark Freeman <markfreeman@google.com>
---

diff --git a/src/math/arith_s390x.go b/src/math/arith_s390x.go
index 129156a9f6..2fda82fff4 100644
--- a/src/math/arith_s390x.go
+++ b/src/math/arith_s390x.go
@@ -129,7 +129,7 @@ func archExpm1(x float64) float64
 func expm1TrampolineSetup(x float64) float64
 func expm1Asm(x float64) float64
 
-const haveArchPow = true
+const haveArchPow = false
 
 func archPow(x, y float64) float64
 func powTrampolineSetup(x, y float64) float64