diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/runtime/asm_s390x.s | 1 | ||||
| -rw-r--r-- | src/runtime/os_linux_s390x.go | 15 |
2 files changed, 16 insertions, 0 deletions
diff --git a/src/runtime/asm_s390x.s b/src/runtime/asm_s390x.s index a7f414ef91..a8e1424bf1 100644 --- a/src/runtime/asm_s390x.s +++ b/src/runtime/asm_s390x.s @@ -142,6 +142,7 @@ nocgo: // argc/argv are already prepared on stack BL runtime·args(SB) + BL runtime·checkS390xCPU(SB) BL runtime·osinit(SB) BL runtime·schedinit(SB) diff --git a/src/runtime/os_linux_s390x.go b/src/runtime/os_linux_s390x.go index b9651f186c..0a1d95975e 100644 --- a/src/runtime/os_linux_s390x.go +++ b/src/runtime/os_linux_s390x.go @@ -6,6 +6,10 @@ package runtime import "internal/cpu" +const ( + _HWCAP_VX = 1 << 11 // vector facility +) + func archauxv(tag, val uintptr) { switch tag { case _AT_HWCAP: @@ -14,3 +18,14 @@ func archauxv(tag, val uintptr) { } func osArchInit() {} + +func checkS390xCPU() { + // Check if the present z-system has the hardware capability to carryout + // floating point operations. Check if hwcap reflects CPU capability for the + // necessary floating point hardware (HasVX) availability. + // Starting with Go1.19, z13 is the minimum machine level for running Go on LoZ + if cpu.HWCap&_HWCAP_VX == 0 { + print("runtime: This CPU has no floating point hardware, so this program cannot be run. \n") + exit(1) + } +} |