Closed Bug 921490 Opened 11 years ago Closed 11 years ago

Ionmonkey ARM: fix the negative zero check path in convertFloat32ToInt32

Categories

(Core :: JavaScript Engine, defect)

ARM
All
defect
Not set
normal

Tracking

()

RESOLVED FIXED
mozilla27

People

(Reporter: dougc, Assigned: dougc)

References

Details

Attachments

(1 file)

The current code generates the following for convertFloat32ToInt32 with the error noted: 0x405137b8: vcvt.s32.f32 s2, s0 0x405137bc: vmov r1, s2 0x405137c0: vcvt.f32.s32 s2, s2 0x405137c4: vcmp.f32 s0, s2 0x405137c8: vmrs APSR_nzcv, fpscr 0x405137cc: bne 0x405138e4 0x405137d0: cmp r1, #0 0x405137d4: vmoveq.32 r1, d0[0] <<<< error 0x405137d8: cmpeq r1, #-2147483648 ; 0x80000000 0x405137ec: beq 0x405138e4 0x405137e0: cmp r1, #7 The follow appears to be what is needed: 0x40513a44: vldr s0, [pc, #204] ; 0x40513b18 0x40513a48: vcvt.s32.f32 s2, s0 0x40513a4c: vmov r1, s2 0x40513a50: vcvt.f32.s32 s2, s2 0x40513a54: vcmp.f32 s0, s2 0x40513a58: vmrs APSR_nzcv, fpscr 0x40513a5c: bne 0x40513bc8 0x40513a60: cmp r1, #0 0x40513a64: vmoveq r1, s0 <<<< Correction 0x40513a68: cmpeq r1, #-2147483648 ; 0x80000000 0x40513a6c: beq 0x40513bc8
Attachment #811143 - Flags: review?(bbouvier)
Comment on attachment 811143 [details] [diff] [review] Fix the negative zero check path in convertFloat32ToInt32 Review of attachment 811143 [details] [diff] [review]: ----------------------------------------------------------------- I clearly think Marty is more qualified for this review than I am.
Attachment #811143 - Flags: review?(bbouvier) → review?(mrosenberg)
Comment on attachment 811143 [details] [diff] [review] Fix the negative zero check path in convertFloat32ToInt32 Review of attachment 811143 [details] [diff] [review]: ----------------------------------------------------------------- I swear, I'm actually on vacation.
Attachment #811143 - Flags: review?(mrosenberg) → review+
Keywords: checkin-needed
Status: NEW → RESOLVED
Closed: 11 years ago
Resolution: --- → FIXED
Target Milestone: --- → mozilla27
You need to log in before you can comment on or make changes to this bug.

Attachment

General

Created:
Updated:
Size: